OKL-T/6-W12N-C

## **www.murata-ps.com** 

## **- - OKL T/6 W12 Series** 

Programmable Output 6-Amp **i** LGA SMT PoLs 

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Typical unit<br>**----- End of picture text -----**<br>


## **FEATURES** 

- **i** LGA inspectable Land Grid Array 

- 4.5-14Vdc input voltage range 

- Programmable output voltage from 0.591-5.5Vdc 

- Drives up to 300 μF ceramic capacitive loads 

- High power conversion effi ciency at 93% 

- Outstanding thermal derating performance 

- Short circuit and over current protection 

- On/Off control and Power Good signal 

## **PRODUCT OVERVIEW** 

The OKL-T/6-W12 series are miniature non-isolated Point-of-Load (PoL) DC/DC power converters for embedded applications. Featuring inspectable Land Grid Array ( **i** LGA) format, the OKL-T/6-W12 measures only 0.48 x 0.48 x 0.283 inches max. (12.2 x 12.2 x 7.2 mm max.). 

The wide input range is 4.5 to 14 Volts DC. The maximum output current is 6 Amps. Based on fi xed-frequency synchronous buck converter switching topology, the high power conversion 

effi cient Point of Load (PoL) module features programmable output voltage and On/Off control. These converters also include under voltage lock out (UVLO), output short circuit protection, and over-current protections. 

An optional sequence/tracking feature on OKL2-T/6-W12 models allows power sequencing of PoL’s. These units meet all standard UL/EN/IEC 60950-1 safety certifi cations (2nd Edition) and RoHS-6 hazardous substance compliance. 

- Optional Sequence/Tracking operation (OKL2-T/6W12 models) 

- Certifi ed to UL/EN/IEC 60950-1 safety, 2nd Edition 

■ RoHS-6 hazardous substance compliance 

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Connection Diagram<br>+Vin +Vout<br>5 Pe eee 5<br>F1<br>On/Off Sense<br>y© Control — ¢* SwitchingFilters | | | O<br>° Controller ¢ Current Sense |<br>External<br>Trim<br>DC<br>Power Open = On Reference and<br>Source Closed = Off Error Amplifier<br>(Positive  1 trim<br>On/Off)<br>Common Common<br>Sequence/Tracking Power Good out<br>**----- End of picture text -----**<br>


Figure 1. OKL2-T/6-W12 

Note: Murata Power Solutions strongly recommends an external input fuse, F1. See specifi cations. 

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For full details go to<br>a www.murata-ps.com/rohs ©<br>**----- End of picture text -----**<br>


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**MDC_OKL-T/6-W12 Series.C02 Page 1 of 17** 

## **- - OKL T/6 W12 Series** 

Programmable Output 6-Amp **i** LGA SMT PoLs 

|**PERFORMANCE SPECIFICATIONS SUMMARY AND ORDERING GUIDE**|**PERFORMANCE SPECIFICATIONS SUMMARY AND ORDERING GUIDE**|**PERFORMANCE SPECIFICATIONS SUMMARY AND ORDERING GUIDE**|**PERFORMANCE SPECIFICATIONS SUMMARY AND ORDERING GUIDE**|**PERFORMANCE SPECIFICATIONS SUMMARY AND ORDERING GUIDE**|**PERFORMANCE SPECIFICATIONS SUMMARY AND ORDERING GUIDE**|**PERFORMANCE SPECIFICATIONS SUMMARY AND ORDERING GUIDE**|**PERFORMANCE SPECIFICATIONS SUMMARY AND ORDERING GUIDE**|||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|**Model Number**||Output||||||Input|||Eff ciency||On/Off Logic|Seq/Track|Package - Pinout P83|
||Vout<br>(Volts)➀|Iout (Amps,<br>max.)|Power<br>(Watts)|R/N (mV p-p)<br>Max.➃|Regulation (max.)||Vin nom.<br>(Volts)|Range<br>(Volts)➀|Iin, no load<br>(mA)➃|<br>Iin, full load<br>(Amps)|||||Case C83<br>inches (mm)|
||||||Line|Load|||||Min.|Typ.||||
|**OKL-T/6-W12P-C**|0.591-5.5|6|30|20|±0.25%|±0.25%|12|4.5-14|20|2.69|91%|93%|Pos.|no|0.48x0.48x0.283 max<br>(12.2x12.2x7.2)max|
|**OKL-T/6-W12N-C**|0.591-5.5|6|30|20|±0.25%|±0.25%|12|4.5-14|20|2.69|91%|93%|Neg.|no|0.48x0.48x0.283 max<br>(12.2x12.2x7.2)max|
|**OKL2-T/6-W12P-C**|0.591-5.5|6|30|20|±0.25%|±0.25%|12|4.5-14|20|2.69|91%|93%|Pos.|yes|0.48x0.48x0.283 max<br>(12.2x12.2x7.2)max|
|**OKL2-T/6-W12N-C**|0.591-5.5|6|30|20|±0.25%|±0.25%|12|4.5-14|20|2.69|91%|93%|Neg.|yes|0.48x0.48x0.283 max<br>(12.2x12.2x7.2) max|



➀ The output range is limited by Vin. See detailed specs. 

- ➁ All specifi cations are at nominal line voltage, Vout=nominal (5V) and full load, +25 deg.C. unless otherwise noted. 

I/O caps are necessary for our test equipment and may not be needed for your application. 

➂ Use adequate ground plane and copper thickness adjacent to the converter. 

-  Ripple and Noise (R/N) and no-load input current are shown at Vout=1V. See specs for details. 

Output capacitors are 10 μF ceramic. Input cap is 22 μF. See detailed specifi cations. 

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PART NUMBER STRUCTURE<br>OK L 2 - T / 6 - W12 N - C<br>Non-isolated PoL<br>LGA Surface Mount<br>Sequence/tracking RoHS Hazardous<br>Blank = Not installed<br>Substance Compliance<br>2 = Installed<br>C  = RoHS-6 (does not claim EU RoHS exemption<br>Trimmable Output  7b–lead in solder)<br>Voltage Range<br>On/Off Logic<br>0.591-5.5Vdc<br>P = Positive Logic<br>N = Negative Logic<br>Maximum Rated Output Input Voltage Range<br>Current in Amps 4.5-14Vdc<br>**----- End of picture text -----**<br>


## **Product Label** 

Because of the small size of these products,  the product label contains a character-reduced code to indicate the model number and manufacturing date code. Not all items on the label are always used. Please note that the label differs from the product photograph. Here is the layout of the label: 

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Model Number Product Code<br>OKL-T/6-W12P-C L01106<br>**----- End of picture text -----**<br>


|**Model Number**|**Product Code**|
|---|---|
|OKL-T/6-W12P-C|L01106|
|OKL-T/6-W12N-C|L00106|
|OKL2-T/6-W12P-C|L21106|
|OKL2-T/6-W12N-C|L20106|



The manufacturing date code is four characters: 

XXXXXX Product code Mfg. date YMDX   Rev. Revision level code 

Figure 2. Label Artwork Layout 

The label contains three rows of information: 

First character – Last digit of manufacturing year, example 200 **9** Second character – Month code (1 through 9 = Jan-Sep; O, N, D = Oct, Nov, Dec) Third character – Day code (1 through 9 = 1 to 9, 10 = 0 and 11 through 31 = A through Z) Fourth character – Manufacturing information 

First row – Murata Power Solutions logo Second row – Model number product code (see table) Third row – Manufacturing date code and revision level 

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**MDC_OKL-T/6-W12 Series.C02 Page 2 of 17** 

## **- - OKL T/6 W12 Series** 

Programmable Output 6-Amp **i** LGA SMT PoLs 

## **Performance and Functional Specifi cations** 

See Note 1 

||~~**Input**~~<br>Input Voltage Range<br>See Ordering Guide and Note 7.<br>Isolation<br>Not isolated<br>Start-Up Voltage<br>4.2 V<br>Undervoltage Shutdown (see Note 15)<br>3.4 V<br>Overvoltage Shutdown<br>None<br>Ref ected (Back) Ripple Current (Note 2) TBD mA pk-pk<br>Internal Input Filter Type<br>Capacitive<br>Recommended External Fuse<br>10A<br>Reverse Polarity Protection<br>None, install external fuse<br>Input Current:<br>Full Load Conditions<br>See Ordering Guide<br>Inrush Transient<br>TBD A2Sec.<br>Shutdown Mode (Off, UV, OT)<br>1 mA<br>Output in Short Circuit<br>10 mA<br>Low Line (Vin=Vmin)<br>4.54 A.<br>Remote On/Off Control (Note 5)<br>Negative Logic<br>ON = Open pin or -0.2V to +0.3V. max.<br>OFF = +3.5V min. to +Vin max.<br>Positive Logic<br>ON = Open pin (internally pulled up) or<br>+3.5V to +Vin max.<br>OFF = -0.3V to +0.8V. max. or ground<br>Current<br>1 mA max.<br>Tracking/Sequencing (optional)<br>See technical note on page 15<br>Slew Rate<br>2 Volts per millisecond, max.<br>Tracking accuracy, rising input<br>Vout = ±100 mV of Sequence In<br>Tracking accuracy, falling input<br>Vout = ±100 mV of Sequence In|
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## ~~**Output**~~ 

Output Power 30.45W max. Output Voltage Range See Ordering Guide Minimum Loading No minimum load Accuracy (50% load, untrimmed) ±1.5 % of Vnominal Voltage Output Range (Note 13) See Ordering Guide Overvoltage Protection (Note 16) None Temperature Coeffi cient TBD per °C of Vout range Ripple/Noise (20 MHz bandwidth) See Ordering Guide and note 8 Line/Load Regulation See Ordering Guide and note 10 Effi ciency See Ordering Guide 

Maximum Capacitive Loading (Note 14) Cap-ESR=0.001 to 0.01 Ohms 300 μF Cap-ESR >0.01 Ohms 1000 μF 

Current Limit Inception (Note 6) (98% of Vout setting, after warm up) 11 Amps Short Circuit Mode Short Circuit Current Output 10 mA Protection Method Hiccup autorecovery upon overload removal. (Note 17) 

Short Circuit Duration 

Continuous, no damage (output shorted to ground) Converter will start up if the external output voltage is less than Vnominal. 

Prebias Startup 

Power Good output open drain confi guration, 10 mA sink PGood TRUE (HI) (Vset -10%) < Vout < (Vset +10%) PGood FALSE (LO) 0.0V < Vout < 0.4V 

||~~**Dynamic Characteristics**~~<br>Dynamic Load Response<br>50μSec max. to within ±2% of f nal value<br>(50-100% load step, di/dt=1A/µSec)<br>(Note 1)<br>Peak Deviation<br>±450 mV<br>Start-Up Time<br>6 mSec for Vout=nominal (Vin On)<br>(Vin on or On/Off to Vout regulated)<br>6 mSec for Vout=nominal (Remote On/Off)<br>Switching Frequency<br>600 KHz<br>~~**Environmental**~~<br>Calculated MTBF (hours)<br>OKL Models<br>OKL2 Models<br> Telecordia method (4a)<br> 6,229,000<br> 5,896,000<br>Calculated MTBF (hours)<br>MIL-HDBK-217N2 method (4b)<br>4,491,000<br>4,392,000<br>Operating Temperature Range (Ambient, all output ranges)<br>See derating curves<br>-40 to TBD with derating (Note 9)<br>Storage Temperature Range<br>-55 to +125 °C.<br>Thermal Protection/Shutdown<br>Included in PWM<br>MSL Rating<br>2<br>Relative Humidity<br>To 85%/+85°C., non-condensing<br>~~**Physical**~~<br>Outline Dimensions<br>See Mechanical Specif cations<br>Weight<br>0.06 ounces (1.6 grams)<br>Plating Thickness<br>Gold overplate 1.18μ" (0.03μm)<br>on Nickel subplate 118.1μ" (3.0μm)<br>Safety<br>Certif ed to UL/cUL 60950-1, CSA-<br>C22.2 No. 60950-1, IEC/EN 60950-1,<br>2nd Edition<br>Restriction of Hazardous Substances<br>RoHS-6 (does not claim EU RoHS exemption<br>7b–lead in solder)<br>~~**Absolute Maximum Ratings**~~<br>Input Voltage (Continuous or transient)<br>0 V. to +15 Volts max.<br>On/Off Control<br>0 V. min. to +14V max.<br>Input Reverse Polarity Protection<br>None, install external fuse<br>Output Current (Note 7)<br>Current-limited. Devices can withstand a<br>sustained short circuit without damage.<br>The outputs are not intended to accept<br>appreciable reverse current.<br>Storage Temperature<br>-55 to +125 °C.<br>Lead Temperature<br>See soldering specif cations|
|---|---|



Absolute maximums are stress ratings. Exposure of devices to greater than any of any of these conditions may adversely affect long-term reliability. Proper operation under conditions other than those listed in the Performance/Functional Specifi cations Table is not implied nor recommended. 

## **Specifi cation Notes:** 

- (1) Specifi cations are typical at +25 °C, Vin=nominal (+12V.), Vout=nominal (+5V), full load, external caps and natural convection unless otherwise indicated. Extended tests at full power must supply substantial forced airfl ow. 

   - All models are tested and specifi ed with external 10μF ceramic output capacitors and a 22 μF external input capacitor. All capacitors are low ESR types. These capacitors are necessary to accommodate our test equipment and may not be required to achieve specifi ed performance in your applications. However, Murata Power Solutions recommends installation of these capacitors. All models are stable and regulate within spec under no-load conditions. 

- (2) Input Back Ripple Current is tested and specifi ed over a 5 Hz to 20 MHz bandwidth. Input fi ltering is Cin=2 x 100 μF ceramic, Cbus=1000 μF electrolytic, Lbus=1 μH. 

- (3) Note that Maximum Power Derating curves indicate an average current at nominal input voltage. At higher temperatures and/or lower airfl ow, the DC/DC converter will tolerate brief full current outputs if the total RMS current over time does not exceed the Derating curve. 

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**MDC_OKL-T/6-W12 Series.C02 Page 3 of 17** 

## **- - OKL T/6 W12 Series** 

## Programmable Output 6-Amp **i** LGA SMT PoLs 

## **Specifi cation Notes, Cont.:** 

- (4a) Mean Time Before Failure is calculated using the Telcordia (Belcore) SR-332 Method 1, Case 3, ground fi xed conditions, Tpcboard=+25 ˚C, full output load, natural air convection. 

- (4b) Mean Time Before Failure is calculated using the MIL-HDBK-217N2 method, ground benign, +25ºC., full output load, natural convection. 

- (5) The On/Off Control Input should use either a switch or an open collector/open drain transistor referenced to -Input Common.  A logic gate may also be used by applying appropriate external voltages which do not exceed +Vin. 

- (6) Short circuit shutdown begins when the output voltage degrades approximately 2% from the selected setting. 

- (7) Please observe the voltage input and output specifi cations in the Voltage Range Graph on page 17. 

- (8) Output noise may be further reduced by adding an external fi lter. At zero output current, the output may contain low frequency components which exceed the ripple specifi cation. The output may be operated indefi nitely with no load. 

- (9) All models are fully operational and meet published specifi cations, including “cold start” at –40˚ C. 

- (10) Regulation specifi cations describe the deviation as the line input voltage or output load current is varied from a nominal midpoint value to either extreme. 

   - (12) Maximum PC board temperature is measured with the sensor in the center of the converter. 

   - (13) Do not exceed maximum power specifi cations when adjusting the output trim. 

   - (14) The maximum output capacitive loads depend on the the Equivalent Series Resistance (ESR) of the external output capacitor and, to a lesser extent, the distance and series impedance to the load. Larger caps will reduce output noise but may change the transient response.  Newer ceramic caps with very low ESR  may require lower capacitor values to avoid instability. Thoroughly test your capacitors in the application. Please refer to the Output Capacitive Load Application Note. 

   - (15) Do not allow the input voltage to degrade lower than the input undervoltage shutdown voltage at all times. Otherwise, you risk having the converter turn off. The undervoltage shutdown is not latching and will attempt to recover when the input is brought back into normal operating range. 

   - (16) The outputs are not intended to sink appreciable reverse current. 

   - (17) “Hiccup” overcurrent operation repeatedly attempts to restart the converter with a brief, full-current output. If the overcurrent condition still exists, the restart current will be removed and then tried again. This short current pulse prevents overheating and damaging the converter. Once the fault is removed, the converter immediately recovers normal operation. 

- (11) Other input or output voltage ranges will be reviewed under scheduled quantity special order. 

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**MDC_OKL-T/6-W12 Series.C02 Page 4 of 17** 

## **- - OKL T/6 W12 Series** 

Programmable Output 6-Amp **i** LGA SMT PoLs 

## **PERFORMANCE DATA AND OSCILLOGRAMS** 

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Effi ciency vs. Line Voltage and Load Current @ +25˚C. (Vout = 5.0V)<br>**----- End of picture text -----**<br>


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100<br>95<br>90 VIN = 6.5V<br><[™<br>VIN = 12V<br>VIN = 14V<br>85<br>80<br>75<br>0 1 2 3 4 5 6<br>Load Current (Amps)<br>Efficiency (%)<br>**----- End of picture text -----**<br>


On/Off Enable Delay (Vin=12V, Vout=5.0V, Iout=6A, Cload=0) Trace 4=Enable, Trace2=Vout 

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Step Load Transient Response (Vin=12V, Vout=5.0V, Cload=0, Iout=3A to 6A)<br>Trace 2=Vout, 200 mV/div. Trace 4=Iout, 5A/div.<br>**----- End of picture text -----**<br>


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Maximum Current Temperature Derating at Sea Level (Vin=12V, Vout=5.0V)<br>7<br>6<br>5<br>Natural Convection<br>4 65 LFM ‘an<br>100 LFM<br>3<br>2<br>1<br>0<br>20 25 30 35 40 45 50 55 60 65 70 75 80 85 90<br>Ambient Temperature (ºC)<br>Output Current (Amps)<br>**----- End of picture text -----**<br>


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Output Ripple and Noise (Vin=12V, Vout=5.0V, Iout=6A, Cload=0, ScopeBW=20MHz)<br>**----- End of picture text -----**<br>


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Step Load Transient Response (Vin=12V, Vout=5.0V, Cload=0, Iout=6A to 3A)<br>Trace 2=Vout, 200 mV/div. Trace 4=Iout, 5A/div.<br>**----- End of picture text -----**<br>


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**MDC_OKL-T/6-W12 Series.C02 Page 5 of 17** 

## **- - OKL T/6 W12 Series** 

Programmable Output 6-Amp **i** LGA SMT PoLs 

## **PERFORMANCE DATA AND OSCILLOGRAMS** 

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Effi ciency vs. Line Voltage and Load Current @ +25˚C. (Vout = 3.3V)<br>100<br>95<br>90 NN<br>VIN = 4.5V<br>2 <I<br>VIN = 12V<br>85 VIN = 14V<br>80<br>75<br>0 1 2 3 4 5 6<br>Load Current (Amps)<br>Efficiency (%)<br>**----- End of picture text -----**<br>


On/Off Enable Delay (Vin=12V, Vout=3.3V, Iout=6A, Cload=0) Trace 4=Enable, Trace2=Vout 

Step Load Transient Response (Vin=12V, Vout=3.3V, Cload=0, Iout=3A to 6A) Trace 2=Vout, 200 mV/div. Trace 4=Iout, 5A/div. 

Maximum Current Temperature Derating at Sea Level (Vin=12V, Vout=3.3V) 

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7<br>6<br>5<br>Natural Convection SS<br>65 LFM<br>4 100 LFM<br>| ~ —<br>3<br>2<br>1<br>0<br>20 25 30 35 40 45 50 55 60 65 70 75 80 85 90<br>Ambient Temperature (ºC)<br>Output Current (Amps)<br>**----- End of picture text -----**<br>


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Output Ripple and Noise (Vin=12V, Vout=3.3V, Iout=6A, Cload=0, ScopeBW=20MHz)<br>**----- End of picture text -----**<br>


Step Load Transient Response (Vin=12V, Vout=3.3V, Cload=0, Iout=6A to 3A) Trace 2=Vout, 200 mV/div. Trace 4=Iout, 5A/div. 

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**MDC_OKL-T/6-W12 Series.C02 Page 6 of 17** 

## **- - OKL T/6 W12 Series** 

Programmable Output 6-Amp **i** LGA SMT PoLs 

## **PERFORMANCE DATA AND OSCILLOGRAMS** 

Effi ciency vs. Line Voltage and Load Current @ +25˚C. (Vout = 2.5V) 

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100<br>95 <a<br>90<br>= — oS<br>VIN = 4.5V<br>85 VIN = 12V<br>VIN = 14V<br>80<br>75<br>0 1 2 3 4 5 6<br>Load Current (Amps)<br>Efficiency (%)<br>**----- End of picture text -----**<br>


On/Off Enable Delay (Vin=12V, Vout=2.5V, Iout=6A, Cload=0) Trace 4=Enable, Trace2=Vout 

Step Load Transient Response (Vin=12V, Vout=2.5V, Cload=0, Iout=3A to 6A) Trace 2=Vout, 200 mV/div. Trace 4=Iout, 5A/div. 

Maximum Current Temperature Derating at Sea Level (Vin=12V, Vout=2.5V) 

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7<br>6<br>5 ™MN! esSN<br>Natural Convection<br>4 PL 65 LFM |<br>100 LFM<br>3<br>2<br>1<br>0<br>20 25 30 35 40 45 50 55 60 65 70 75 80 85 90<br>Ambient Temperature (ºC)<br>Output Current (Amps)<br>**----- End of picture text -----**<br>


Output Ripple and Noise (Vin=12V, Vout=2.5V, Iout=6A, Cload=0, ScopeBW=20MHz) 

Step Load Transient Response (Vin=12V, Vout=2.5V, Cload=0, Iout=6A to 3A) Trace 2=Vout, 200 mV/div. Trace 4=Iout, 5A/div. 

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**MDC_OKL-T/6-W12 Series.C02 Page 7 of 17** 

## **- - OKL T/6 W12 Series** 

Programmable Output 6-Amp **i** LGA SMT PoLs 

## **PERFORMANCE DATA AND OSCILLOGRAMS** 

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Effi ciency vs. Line Voltage and Load Current @ +25˚C. (Vout = 1.8V)<br>100<br>95<br>Dawe<br>90 4m<br>So<br>85 JSas VIN = 4.5V =ee<br>VIN = 12V<br>VIN = 14V<br>80<br>75<br>0 1 2 3 4 5 6<br>Load Current (Amps)<br>Efficiency (%)<br>**----- End of picture text -----**<br>


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On/Off Enable Delay (Vin=12V, Vout=1.8V, Iout=6A, Cload=0)<br>Trace 4=Enable, Trace2=Vout<br>**----- End of picture text -----**<br>


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Step Load Transient Response (Vin=12V, Vout=1.8V, Cload=0, Iout=3A to 6A)<br>Trace 2=Vout, 200 mV/div. Trace 4=Iout, 5A/div.<br>**----- End of picture text -----**<br>


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Maximum Current Temperature Derating at Sea Level (Vin=12V, Vout=1.8V)<br>7<br>6<br>5 PLN CBs<br>Natural Convection NOS<br>4 100 LFM65 LFM a><<br>3<br>2<br>1<br>0<br>20 25 30 35 40 45 50 55 60 65 70 75 80 85 90<br>Ambient Temperature (ºC)<br>Output Current (Amps)<br>**----- End of picture text -----**<br>


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Output Ripple and Noise (Vin=12V, Vout=1.8V, Iout=6A, Cload=0, ScopeBW=20MHz)<br>**----- End of picture text -----**<br>


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Step Load Transient Response (Vin=12V, Vout=1.8V, Cload=0, Iout=6A to 3A)<br>Trace 2=Vout, 200 mV/div. Trace 4=Iout, 5A/div.<br>**----- End of picture text -----**<br>


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**MDC_OKL-T/6-W12 Series.C02 Page 8 of 17** 

## **- - OKL T/6 W12 Series** 

Programmable Output 6-Amp **i** LGA SMT PoLs 

## **PERFORMANCE DATA AND OSCILLOGRAMS** 

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Effi ciency vs. Line Voltage and Load Current @ +25˚C. (Vout = 1.2V)<br>100<br>95<br>9085 ONa ee<br>80 V IN  = 4.5V<br>VIN = 12V<br>ff<br>75 V IN  = 14V<br>70 /,~——S +} —<br>65<br>0 1 2 3 4 5 6<br>Load Current (Amps)<br>On/Off Enable Delay (Vin=12V, Vout=1.2V, Iout=6A, Cload=0)<br>Trace 4=Enable, Trace2=Vout<br>Efficiency (%)<br>**----- End of picture text -----**<br>


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Step Load Transient Response (Vin=12V, Vout=1.2V, Cload=0, Iout=3A to 6A)<br>Trace 2=Vout, 200 mV/div. Trace 4=Iout, 5A/div.<br>**----- End of picture text -----**<br>


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**----- Start of picture text -----**<br>
Maximum Current Temperature Derating at Sea Level (Vin=12V, Vout=1.2V)<br>7<br>6<br>5<br>Natural Convection<br>65 LFM<br>4 100 LFM a~—<br>3<br>2<br>Pit ey te<br>1<br>0<br>20 25 30 35 40 45 50 55 60 65 70 75 80 85 90<br>Ambient Temperature (ºC)<br>Output Current (Amps)<br>**----- End of picture text -----**<br>


**==> picture [250 x 9] intentionally omitted <==**

**----- Start of picture text -----**<br>
Output Ripple and Noise (Vin=12V, Vout=1.2V, Iout=6A, Cload=0, ScopeBW=20MHz)<br>**----- End of picture text -----**<br>


Step Load Transient Response (Vin=12V, Vout=1.2V, Cload=0, Iout=6A to 3A) Trace 2=Vout, 200 mV/div. Trace 4=Iout, 5A/div. 

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**MDC_OKL-T/6-W12 Series.C02 Page 9 of 17** 

## **- - OKL T/6 W12 Series** 

Programmable Output 6-Amp **i** LGA SMT PoLs 

## **PERFORMANCE DATA AND OSCILLOGRAMS** 

**==> picture [249 x 210] intentionally omitted <==**

**----- Start of picture text -----**<br>
Effi ciency vs. Line Voltage and Load Current @ +25˚C. (Vout = 1.0V)<br>100<br>95<br>90<br>pf— ff} TT<br>85 1<br>ee<br>80 eS—— ee<br>VIN = 4.5V<br>75 OS — VIN = 12V eae<br>VIN = 14V<br>70 an |im|s<br>65<br>60<br>0 1 2 3 4 5 6<br>Load Current (Amps)<br>On/Off Enable Delay (Vin=12V, Vout=1.0V, Iout=6A, Cload=0)<br>Trace 4=Enable, Trace2=Vout<br>Efficiency (%)<br>**----- End of picture text -----**<br>


Step Load Transient Response (Vin=12V, Vout=1.0V, Cload=0, Iout=3A to 6A) Trace 2=Vout, 200 mV/div. Trace 4=Iout, 5A/div. 

**==> picture [222 x 9] intentionally omitted <==**

**----- Start of picture text -----**<br>
Maximum Current Temperature Derating at Sea Level (Vin=12V, Vout=1.0V)<br>**----- End of picture text -----**<br>


**==> picture [236 x 158] intentionally omitted <==**

**----- Start of picture text -----**<br>
7<br>6<br>5 Pia~~] eee,ss|<br>Natural Convection SS<br>65 LFM <<br>4 100 LFM oS<br>3 ~<br>2 PTT ETTPE<br>1<br>0<br>20 25 30 35 40 45 50 55 60 65 70 75 80 85 90<br>Ambient Temperature (ºC)<br>Output Current (Amps)<br>**----- End of picture text -----**<br>


**==> picture [250 x 9] intentionally omitted <==**

**----- Start of picture text -----**<br>
Output Ripple and Noise (Vin=12V, Vout=1.0V, Iout=6A, Cload=0, ScopeBW=20MHz)<br>**----- End of picture text -----**<br>


Step Load Transient Response (Vin=12V, Vout=1.0V, Cload=0, Iout=6A to 3A) Trace 2=Vout, 200 mV/div. Trace 4=Iout, 5A/div. 

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**MDC_OKL-T/6-W12 Series.C02 Page 10 of 17** 

**- - OKL T/6 W12 Series** 

Programmable Output 6-Amp **i** LGA SMT PoLs 

## **MECHANICAL SPECIFICATIONS** 

**==> picture [307 x 203] intentionally omitted <==**

**----- Start of picture text -----**<br>
INPUT/OUTPUT CONNECTIONS<br>Pin Function<br>1 On/Off Control*<br>Bottom  View 2 VIN<br>3 Ground<br>4 VOUT<br>5 Sense<br>6 Trim<br>7 Ground<br>8 No Connection<br>9 Sequence/Tracking**<br>10 Power Good Out<br>11 No Connection<br>Side View 12 No Connection<br>*The Remote On/Off can be provided with<br>either positive (P suffi x) or negative (N<br>suffi x) logic.<br>**OKL2 models only<br>**----- End of picture text -----**<br>


**==> picture [124 x 143] intentionally omitted <==**

**----- Start of picture text -----**<br>
Top View<br>0.48<br>(12.19)<br>0.48<br>(12.19)<br>**----- End of picture text -----**<br>


**==> picture [185 x 68] intentionally omitted <==**

**----- Start of picture text -----**<br>
0.283 SOLDER PAD NOTES:<br>(7.2)<br>max.<br>End View<br>**----- End of picture text -----**<br>


[1] To avoid incorrect contacts with exposed via’s and plated through holes on the bottom of the converter, do not have any exposed copper around the unit aside from our recommended footprint. Except for connections to the pads, keep all external circuits away from the board edges. 

[2] Do not connect any additional components between the Trim pin and Vout or between the Trim and Sense pins. Use only the specifi ed connections. 

Recommended Footprint -through the Board- 

**==> picture [476 x 335] intentionally omitted <==**

**----- Start of picture text -----**<br>
Bottom View -through the Board-<br>12.7<br>0.50 4.57 0.070-0.080 [1.78-2.03mm]<br>                  x<br>0.180 0.160-0.170 [4.06-4.32mm]<br>3.43<br>            3 PLACES<br>0.135 1.14 1.27<br>0.045 0.050 (14 PLS)<br>4 3 2 2 3 4<br>0.420 (10.67)<br>0.375 (9.53) Gnd Vin Vin Gnd<br>4.57 3.43 12.40<br>0.180<br>0.240 (6.10) 5 Se n s e On /Off 1 12.70.50 1 On/Off Sense 5 0.135 CL 0.488<br>2.29<br>0.150 (3.81) 11 NC PGood 10 0.090 10 PG NC 11 4.57<br>0.180<br>6 Trim NC Gnd NC Seq NC Gnd NC Trim1<br>6<br>0.060 (1.52) 9<br>0 9 Seq<br>12 7 8<br>8 7 12<br>2.29<br>0.090 0.040-0.050 [1.02-1.27mm]<br>    SQUARE PAD (9 PLS)<br>Dimensions are in inches (mm shown for ref. only). 4.57 2.29<br>0.180 0.090<br>Third Angle Projection CL Copper Pads<br>Plating Thickness:<br>Gold overplate 1.18μ" (0.03μm)  12.40 No Exposed<br>on Nickel subplate 118.1μ" (3.0μm) 0.488 Copper<br>Permitted<br>Tolerances (unless otherwise specified):<br>.XX ± 0.02 (0.5)<br>.XXX ± 0.010 (0.25)<br>Angles ± 1˚<br>Figure 3. OKL-T/6-W12 Mechanical Outline<br>Components are shown for reference only.<br>0 0.060 (1.52) 0.195 (4.95) 0.375 (9.53)<br>Vout<br>Vout1<br>0.150 (3.81) 0.240 (6.10) 0.330 (8.38) 0.420 (10.67)<br>**----- End of picture text -----**<br>


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**MDC_OKL-T/6-W12 Series.C02 Page 11 of 17** 

**- - OKL T/6 W12 Series** 

Programmable Output 6-Amp **i** LGA SMT PoLs 

## **TAPE AND REEL INFORMATION (MSL RATING 2)** 

## **Tape Detail** 

**==> picture [460 x 251] intentionally omitted <==**

**----- Start of picture text -----**<br>
7.40±0.1<br>Round<br>2.00±0.1<br>Sprocket 0.40±0.05<br>ø1.50 [+0.1] -0 16.00±0.1 4.00±0.1<br>B’ Holes<br>B<br>Vacuum Pickup A A’<br>Point in Center Pulling direction<br>12.60±0.1<br>(7.0º)<br>Notes<br>1) The radius (R) is 0.3mm max.<br>2) Cumulative tolerance of 10 pitches of the sprocket hole is ±0.2mm.<br>1.75±0.1<br>+0.3-0.1<br>11.50±0.1<br>YMDX   Rev. L0010 3 YMDX   Rev. L00103 YMDX   Rev. L00103 24.00<br>12.60±0.1<br>B-B’ SECTION<br>(7.0º)<br>**----- End of picture text -----**<br>


A-A’ SECTION 

## **Reel Detail** 

**==> picture [467 x 152] intentionally omitted <==**

**----- Start of picture text -----**<br>
Reel diameter 330.2 Start of<br>pocket tape<br>A<br>End of modules C<br>B<br>Start of  Start of<br>modules  cover tape<br>in pockets<br>Hub diameter 13.00 Inner diameter 101.6<br>**----- End of picture text -----**<br>


All dimensions are in millimeters. 

## **Reel Information (400 units per reel)** 

**==> picture [258 x 17] intentionally omitted <==**

**----- Start of picture text -----**<br>
Key Description Length (mm)<br>**----- End of picture text -----**<br>


|**Key**|**Description**|**Length (mm)**|
|---|---|---|
||||
|**A**|Tape trailer (no modules)|800 ±40|
|**B**|Pocket tape length before modules|200 min.|
|**C**|Cover tape length before pocket tape|240 ±40|



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**MDC_OKL-T/6-W12 Series.C02 Page 12 of 17** 

**- - OKL T/6 W12 Series** 

## Programmable Output 6-Amp **i** LGA SMT PoLs 

## ~~**TECHNICAL NOTES**~~ 

## **Output Voltage Adustment** 

The output voltage may be adjusted over a limited range by connecting an external trim resistor (Rtrim) between the Trim pin and Ground. The Rtrim is recommended to have a ±0.5% accuracy (or better) with low temperature coeffi cient, ±100 ppm/°C or better. Mount the resistor close to the converter with very short leads or use a surface mount trim resistor. 

In the tables below, the calculated resistance is given. Do not exceed the specifi ed limits of the output voltage or the converter’s maximum power rating when applying these resistors. Also, avoid high noise at the Trim input. However, to prevent instability, you should never connect any capacitors to Trim. 

## **OKL-T/6-W12** 

**==> picture [202 x 17] intentionally omitted <==**

**----- Start of picture text -----**<br>
Output Voltage Calculated Rtrim (KΩ)<br>**----- End of picture text -----**<br>


|**Output Voltage**|**Calculated Rtrim (KΩ)**|
|---|---|
|||
|5.0 V.|1.34|
|3.3 V.|2.18|
|2.5 V.|3.1|
|2.0 V.|4.19|
|1.8 V.|4.88|
|1.5 V.|6.50|
|1.2 V.|9.70|
|1.0 V.|14.45|
|0.591 V.|∞ (open)|



## **Resistor Trim Equation, OKL-T/6-W12 models:** 

5.91 RTRIM (k  ) =[_____________] VOUT – 0.591 

Do not connect any additional components between the Vtrim pin and Vout or between the Trim and Sense pins. Use only the specifi ed connections as recommended per this data sheet. 

## **Input Fusing** 

Certain applications and/or safety agencies may require fuses at the inputs of power conversion components. Fuses should also be used when there is the possibility of sustained input voltage reversal which is not currentlimited. For greatest safety, we recommend a fast blow fuse installed in the ungrounded input supply line. 

The installer must observe all relevant safety standards and regulations. For safety agency approvals, install the converter in compliance with the end-user safety standard. 

## **Input Under-Voltage Shutdown and Start-Up Threshold** 

Under normal start-up conditions, converters will not begin to regulate properly until the ramping-up input voltage exceeds and remains at the Start-Up Threshold Voltage (see Specifi cations). Once operating, converters will not turn off until the input voltage drops below the Under-Voltage Shutdown Limit. Subsequent restart will not occur until the input voltage rises again above the Start-Up Threshold. This built-in hysteresis prevents any unstable on/off operation at a single input voltage. 

Users should be aware however of input sources near the Under-Voltage Shutdown whose voltage decays as input current is consumed (such as capacitor inputs), the converter shuts off and then restarts as the external capacitor recharges. Such situations could oscillate. To prevent this, make 

sure the operating input voltage is well above the UV Shutdown voltage AT ALL TIMES. 

## **Start-Up Time** 

Assuming that the output current is set at the rated maximum, the Vin to Vout Start-Up Time (see Specifi cations) is the time interval between the point when the ramping input voltage crosses the Start-Up Threshold and the fully loaded regulated output voltage enters and remains within its specifi ed accuracy band. Actual measured times will vary with input source impedance, external input capacitance, input voltage slew rate and fi nal value of the input voltage as it appears at the converter. 

These converters include a soft start circuit to moderate the duty cycle of its PWM controller at power up, thereby limiting the input inrush current. 

The On/Off Remote Control interval from On command to Vout regulated assumes that the converter already has its input voltage stabilized above the Start-Up Threshold before the On command. The interval is measured from the On command until the output enters and remains within its specifi ed accuracy band. The specifi cation assumes that the output is fully loaded at maximum rated current. Similar conditions apply to the On to Vout regulated specifi cation such as external load capacitance and soft start circuitry. 

## **Recommended Input Filtering** 

The user must assure that the input source has low AC impedance to provide dynamic stability and that the input supply has little or no inductive content, including long distributed wiring to a remote power supply. The converter will operate with no additional external capacitance if these conditions are met. 

For best performance, we recommend installing a low-ESR capacitor immediately adjacent to the converter’s input terminals. The capacitor should be a ceramic type such as the Murata GRM32 series or a polymer type. Initial suggested capacitor values are 10 to 22 μF, rated at twice the expected maximum input voltage. Make sure that the input terminals do not go below the undervoltage shutdown voltage at all times. More input bulk capacitance may be added in parallel (either electrolytic or tantalum) if needed. 

## **Recommended Output Filtering** 

The converter will achieve its rated output ripple and noise with no additional external capacitor. However, the user may install more external output capacitance to reduce the ripple even further or for improved dynamic response. Again, use low-ESR ceramic (Murata GRM32 series) or polymer capacitors. Initial values of 10 to 47 μF may be tried, either single or multiple capacitors in parallel. Mount these close to the converter. Measure the output ripple under your load conditions. 

Use only as much capacitance as required to achieve your ripple and noise objectives. Excessive capacitance can make step load recovery sluggish or possibly introduce instability. Do not exceed the maximum rated output capacitance listed in the specifi cations. 

## **Input Ripple Current and Output Noise** 

All models in this converter series are tested and specifi ed for input refl ected ripple current and output noise using designated external input/ output components,  circuits and layout as shown in the fi gures below. The Cbus and Lbus components simulate a typical DC voltage bus. Please note that the values of Cin, Lbus and Cbus will vary according to the specifi c converter model. 

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**MDC_OKL-T/6-W12 Series.C02 Page 13 of 17** 

## **- - OKL T/6 W12 Series** 

Programmable Output 6-Amp **i** LGA SMT PoLs 

**==> picture [249 x 137] intentionally omitted <==**

**----- Start of picture text -----**<br>
TO<br>OSCILLOSCOPE CURRENT<br>PROBE<br>+VIN<br>LBUS<br>+<br>VIN – CBUS CIN<br>+<br>–<br>-VIN<br>CIN = 2 x 100μF, ESR < 700mΩ @ 100kHz<br>CBUS = 1000μF, ESR < 100mΩ @ 100kHz<br>LBUS = 1μH<br>**----- End of picture text -----**<br>


Figure 4: Measuring Input Ripple Current 

**==> picture [249 x 162] intentionally omitted <==**

**----- Start of picture text -----**<br>
+VOUT<br>C1 C2 SCOPE RLOAD<br>-VOUT<br>C1 = 1μF<br>C2 = 10μF<br>LOAD 2-3 INCHES (51-76mm) FROM MODULE<br>**----- End of picture text -----**<br>


Figure 5: Measuring Output Ripple and Noise (PARD) 

## **Minimum Output Loading Requirements** 

All models regulate within specifi cation and are stable under no load to full load conditions. Operation under no load might however slightly increase output ripple and noise. 

## **Thermal Shutdown** 

To prevent many over temperature problems and damage, these converters include thermal shutdown circuitry. If environmental conditions cause the temperature of the DC/DC’s to rise above the Operating Temperature Range up to the shutdown temperature, an on-board electronic temperature sensor will power down the unit. When the temperature decreases below the turn-on threshold, the converter will automatically restart. There is a small amount of hysteresis to prevent rapid on/off cycling. 

**CAUTION:** If you operate too close to the thermal limits, the converter may shut down suddenly without warning. Be sure to thoroughly test your application to avoid unplanned thermal shutdown. 

## **Temperature Derating Curves** 

The graphs in this data sheet illustrate typical operation under a variety of conditions. The Derating curves show the maximum continuous ambient air temperature and decreasing maximum output current which is acceptable under increasing forced airfl ow measured in Linear Feet per Minute (“LFM”). Note that these are AVERAGE measurements. The converter will accept brief increases in current or reduced airfl ow as long as the average is not exceeded. 

Note that the temperatures are of the ambient airfl ow, not the converter itself which is obviously running at higher temperature than the outside air. Also note that very low fl ow rates (below about 25 LFM) are similar to “natural convection”, that is, not using fan-forced airfl ow. 

Murata Power Solutions makes Characterization measurements in a closed cycle wind tunnel with calibrated airfl ow. We use both thermocouples and an infrared camera system to observe thermal performance. 

**CAUTION:** These graphs are all collected at slightly above Sea Level altitude. Be sure to reduce the derating for higher density altitude. 

## **Output Voltage Sequencing** 

The OKL modules include a sequencing feature that enables users to implement various types of output voltage sequencing in their applications. This is accomplished via an additional sequencing pin. When not using the sequencing feature, either tie the sequence pin to Vin or leave it unconnected. 

When an analog voltage is applied to the sequence pin, the output voltage tracks this voltage until the output reaches the set-point voltage. The fi nal value of the sequence voltage must be set higher than the setpoint voltage of the module. The output voltage follows the voltage on the sequence pin on a one-to-one volt basis. By connecting multiple modules together, multiple modules can track their output voltages to the voltage applied on the sequence pin. 

For proper voltage sequencing, fi rst, input voltage is applied to the module. The On/Off pin of the module is left unconnected (or tied to GND for negative logic modules or tied to Vin for positive logic modules) so that the module is ON by default. After applying input voltage to the module, a minimum 10msec delay is required before applying voltage on the sequence pin. During this time, a voltage of 50mV (± 20 mV) is maintained on the sequence pin. This delay gives the module enough time to complete its internal powerup soft-start cycle. During the delay time, the sequence pin should be held close to ground (nominally 50mV ± 20 mV). This is required to keep the internal opamp out of saturation thus preventing output overshoot during the start of the sequencing ramp. By selecting resistor R1 according to the following equation 

**==> picture [78 x 19] intentionally omitted <==**

the voltage at the sequencing pin will be 50mV when the sequencing signal is at zero. See fi gure 6 for R1 connection for the sequencing signal to the SEQ pin. 

http://www.murata-ps.com/data/apnotes/dcan-61.pdfClick here to view Application Note DCAN-61 

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**MDC_OKL-T/6-W12 Series.C02 Page 14 of 17** 

## **- - OKL T/6 W12 Series** 

Programmable Output 6-Amp **i** LGA SMT PoLs 

## **Output Current Limiting** 

Current limiting inception is defi ned as the point at which full power falls below the rated tolerance. See the Performance/Functional Specifi cations. Note particularly that the output current may briefl y rise above its rated value in normal operation as long as the average output power is not exceeded. This enhances reliability and continued operation of your application. If the output current is too high, the converter will enter the short circuit condition. 

## **Output Capacitive Load** 

These converters do not require external capacitance added to achieve rated specifi cations. Users should only consider adding capacitance to reduce switching noise and/or to handle spike current load steps. Install only enough capacitance to achieve noise objectives. Excess external capacitance may cause regulation problems, degraded transient response and possible oscillation or instability. 

## **Output Short Circuit Condition** 

When a converter is in current-limit mode, the output voltage will drop as the output current demand increases. If the output voltage drops too low (approximately 98% of nominal output voltage for most models), the magnetically coupled voltage used to develop primary side voltages will also drop, thereby shutting down the PWM controller. Following a time-out period, the PWM will restart, causing the output voltage to begin ramping up to its appropriate value. If the short-circuit condition persists, another shutdown cycle will initiate. This rapid on/off cycling is called “hiccup mode”. The hiccup cycling reduces the average output current, thereby preventing excessive internal temperatures and/or component damage. A short circuit can be tolerated indefi nitely. 

The “hiccup” system differs from older latching short circuit systems because you do not have to power down the converter to make it restart. The system will automatically restore operation as soon as the short circuit condition is removed. 

## **Remote On/Off Control** 

The OKL Series power modules can be specifi ed with either a positive or negative logic type. See Figures 7 and 8 for On/Off circuit control. In the positive logic on/off option the unit turns on during a logic high on the On/Off pin and turns off during a logic low. In a negative logic on/off option, the unit turns off during logic high and on during logic low. The On/Off signal should always be reference to ground. For positive or negative option, leaving then On/Off pin disconnected will turn the unit on when input voltage is present. 

Positive—Units are enabled when the on/off pin is left open or is pulled high to +Vin. The On/Off circuit control is shown in fi gure 7. When the external transistor Q1 is in the off state, the internal PWM enable pin is pull high causing the unit to turn on. When Q1 is turn on, the On/Off pin is pulled low and the units is off. Rp should be around 20K ohms. 

Negative—Units are enabled when the ON/Off is open or brought to within a low voltage (see specifi cations) with respect to –Vin. The unit is off when the ON/Off is pulled high with respect to –Vin (see specifi cations). The On/Off circuitry is shown in fi gure 8. The On/Off pin should be pulled high with an external pull-up resistor (20K ohms). When Q1 is in the off state, the On/Off pin is pulled high, transistor Q3 is turn on and the unit is off. To turn on the unit, Q1 is turn on, pulling the On/Off pin low and turning Q3 off resulting on the unit being on. 

Dynamic control of the On/Off function should be able to sink the specifi ed signal current when brought low and withstand appropriate voltage when brought high. Be aware too that there is a fi nite time in milliseconds (see specifi cations) between the time of On/Off Control activation and stable, regulated output. This time will vary slightly with output load type and current and input conditions. 

**==> picture [245 x 179] intentionally omitted <==**

**----- Start of picture text -----**<br>
OKL -T<br>+Vin<br>470K<br>+<br>R1 OUT<br>–<br>SEQ 10K<br>SEQ<br>Control Voltage<br>GND<br>**----- End of picture text -----**<br>


Figure 6. Sequencing Signal Interface of Module 

**==> picture [246 x 165] intentionally omitted <==**

**----- Start of picture text -----**<br>
OKL N Module<br>+Vin +Vin<br>E PWM<br>Rp<br>On/Off<br>Q3<br>GND<br>Q1<br>GND GND<br>BOM    Rp    20K<br>BOM    Q1    Q SMT MOS P 30V<br>**----- End of picture text -----**<br>


Figure 7. On/Off Circuit Control for Using Negative On/Off Logic 

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**MDC_OKL-T/6-W12 Series.C02 Page 15 of 17** 

## **- - OKL T/6 W12 Series** 

## Programmable Output 6-Amp **i** LGA SMT PoLs 

## **Voltage Range Graph** 

Please observe the limits below for voltage input and output ranges. These limits apply at all output currents. 

**==> picture [244 x 158] intentionally omitted <==**

**----- Start of picture text -----**<br>
16<br>14<br>12<br>10<br>Vin=14V / Vout=1V<br>8<br>Vin=4.5V / Vout=3.63V<br>6<br>4<br>Upper Limit<br>2<br>Lower Limit<br>0<br>0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5<br>Output Voltage (V)<br>Input Voltage (V)<br>**----- End of picture text -----**<br>


## **Soldering Guidelines** 

Murata Power Solutions recommends the specifi cations below when installing these converters. These specifi cations vary depending on the solder type. Exceeding these specifi cations may cause damage to the product. Your production environment may differ therefore please thoroughly review these guidelines with your process engineers. 

|~~**Reflow Solder Operations for surface-mount products (SMT)**~~|~~**Reflow Solder Operations for surface-mount products (SMT)**~~|
|---|---|
|**For Sn/Ag/Cu based solders:**||
|Preheat Temperature|Less than 1 ºC. per second|
|Time over Liquidus|45 to 75 seconds|
|Maximum Peak Temperature|260 ºC.|
|Cooling Rate|Less than 3 ºC. per second|
|**For Sn/Pb based solders:**||
|Preheat Temperature|Less than 1 ºC. per second|
|Time over Liquidus|60 to 75 seconds|
|Maximum Peak Temperature|235 ºC.|
|Cooling Rate|Less than 3 ºC. per second|



## **Recommended Lead-free Solder Refl ow Profi le** 

**==> picture [248 x 150] intentionally omitted <==**

**----- Start of picture text -----**<br>
250 Peak Temp.  235-260° C<br>200<br>150 Reflow Zone<br>Soaking Zone time above 217° C<br>120 sec max 45-75 sec<br>100<br><1.5° C/sec High trace = normal upper limit<br>Preheating Zone Low trace = normal lower limit<br>50<br>240 sec max<br>0<br>0 30 60 90 120 150 180 210 240 270 300<br>Time (sec)<br>Temperature (°C)<br>**----- End of picture text -----**<br>


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**MDC_OKL-T/6-W12 Series.C02 Page 16 of 17** 

## **- - OKL T/6 W12 Series** 

Programmable Output 6-Amp **i** LGA SMT PoLs 

## **Vertical Wind Tunnel** 

**==> picture [312 x 281] intentionally omitted <==**

**----- Start of picture text -----**<br>
IR Transparent<br>optical window Variable<br>Unit under speed fan<br>test (UUT)<br>IR Video<br>oT, Se Camera i a t s<br>ms)<br>Heating<br>element<br>Precision<br>low-rate<br>See<br>anemometer<br>3” below UUT<br>Ambient<br>temperature<br>sensor<br>—<br>Airflow<br>collimator<br>y }<br>**----- End of picture text -----**<br>


Murata Power Solutions employs a computer controlled custom-designed closed loop vertical wind tunnel, infrared video camera system, and test instrumentation for accurate airfl ow and heat dissipation analysis of power products. The system includes a precision low fl ow-rate anemometer, variable speed fan, power supply input and load controls, temperature gauges, and adjustable heating element. 

The IR camera monitors the thermal performance of the Unit Under Test (UUT) under static steady-state conditions. A special optical port is used which is transparent to infrared wavelengths. 

Both through-hole and surface mount converters are soldered down to a host carrier board for realistic heat absorption and spreading. Both longitudinal and transverse airfl ow studies are possible by rotation of this carrier board since there are often signifi cant differences in the heat dissipation in the two airfl ow directions. The combination of adjustable airfl ow, adjustable ambient heat, and adjustable Input/Output currents and voltages mean that a very wide range of measurement conditions can be studied. 

The collimator reduces the amount of turbulence adjacent to the UUT by minimizing airfl ow turbulence. Such turbulence infl uences the effective heat transfer characteristics and gives false readings. Excess turbulence removes more heat from some surfaces and less heat from others, possibly causing uneven overheating. 

Both sides of the UUT are studied since there are different thermal gradients on each side. The adjustable heating element 

and fan, built-in temperature gauges, and no-contact IR camera mean that power supplies are tested in real-world conditions. 

Figure 9. Vertical Wind Tunnel 

**This product is subject to the following operating requirements and the Life and Safety Critical Application Sales Policy:** ~~i~~ **Refer to: http://www.murata-ps.com/requirements/** Murata Power Solutions, Inc. makes no representation that the use of its products in the circuits described herein, or the use of other technical information contained herein, will not infringe upon existing or future patent rights. The descriptions contained herein do not imply the granting of licenses to make, use, or sell equipment constructed in accordance therewith. Specifi cations are subject to change without notice. _**© 2016 Murata Power Solutions, Inc.**_ 

Murata Power Solutions, Inc. 11 Cabot Boulevard, Mansfi eld, MA 02048-1151 U.S.A. ISO 9001 and 14001 REGISTERED 

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