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AL1676-40DS7-13
LED DRIVER, BUCK, -40 TO 105DEG C
⚠️ Reference pricing provided. In case of supply shortages, we will connect you with our trusted procurement partners to ensure your project's continuity.
- Manufacturer: DIODES INC.
- Product type: AC / DC LED Driver ICs
- IC Mounting: Surface Mount
- No. of Pins: 7Pins
- No. of Outputs: 1Outputs
- Device Topology: Buck (Step Down)
- Driver Case Style: SOIC
- Input Voltage Max: 277V
- Input Voltage Min: 85V
- Output Current Max: 350mA
- Output Voltage Max: 20V
- Switching Frequency: 200kHz
- Operating Temperature Max: 105°C
- Operating Temperature Min: -40°C
| Delivery and price | |
|---|---|
| Units per pack | 10 |
| Price | 0.339 € |
| Current stock | 25+ |
| Lead time | 7 days |
Datasheet
**AL1676 UNIVERSAL HIGH POWER FACTOR BUCK LED DRIVER**
## **Description**
## **Pin Assignments**
The AL1676 is a universal AC input (85~277 VAC), high power factor (PF) and high efficiency Buck LED driver. The AL1676 topology provides accurate constant current (CC) with good line and load regulation, operating at boundary conduction mode (BCM) to ease in EMI/EMC qualification and testing to meet the latest regulatory laws.
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**----- Start of picture text -----**<br>
(PF) and high efficiency Buck LED driver. The AL1676 topology (Top View)<br>provides accurate constant current (CC) with good line and load<br>regulation, operating at boundary conduction mode (BCM) to ease in<br>VCC 4a 1 7 D<br>EMI/EMC qualification and testing to meet the latest regulatory laws.<br>ROVP 4 2<br>The AL1676 single Buck stage driver works with a single winding<br>COMP J 3 a 6 NC<br>inductor and High voltage MOSFET included, therefore, can use<br>fewer external components and create a low bill of material (BOM) GND J 4 > 5 CS<br>cost solution. The AL1676 has rich protection features to enhance<br>system safety and reliability, including under voltage lock out (UVLO),<br>LED open/short, over voltage, over current, over temperature SO-7<br>protection and thermal fold-back function which can reduce output<br>current when the driver’s temperature is higher than the setting value.<br>**----- End of picture text -----**<br>
The AL1676 is available for SO-7 package.
## **Features**
- >90% Efficiency
- Universal 85 to 277 VAC Input Range
- Multiple Options for Internal MOSFET
- Tight Output Current Tolerance: ±3%
- Low Startup Current: 100µA
- Low Operation Current: 170µA (5KHs Switching)
## **Applications**
- Retrofit LED Lamps
- LED Tube
- High Voltage DC-DC LED Driver
- General Purpose Constant Current Source
- Single Winding Inductor
- Internal Protections:
- Under Voltage Lock Out (UVLO)
- Leading-Edge Blanking (LEB)
- Cycle-by-cycle Over Current Protection (OCP)
- Output Open/Short Protection (OVP/OSP)
- Thermal Fold-back Protection (TFP)
- Over Temperature Protection (OTP)
- SO-7 Package
- **Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)**
- **Halogen and Antimony Free. “Green” Device (Note 3** )
Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.
2. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green" and Lead-free.
3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and <1000ppm antimony compounds.
1 of 15 **www.diodes.com**
AL1676 Document number: DS38290 Rev. 1 - 2
February 2016 © Diodes Incorporated
**AL1676**
## **Typical Applications Circuit**
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L1<br>C5<br>R1 D1 R4 + OUT<br>F1 L2<br>AC R2<br>Input<br>DB1 C1 C2 VR U1 AL1676<br>VCC D<br>ROVP<br>COMP NC<br>GND CS<br>C3 R3 C4<br>R5<br>Pin Descriptions<br>Pin Number Pin Name Function<br>1 VCC Power supply voltage<br>2 ROVP Resistor set the open voltage<br>3 COMP Compensation for current control<br>4 GND Ground<br>5 CS Current sensing<br>6 NC No connection<br>7 D Drain of the internal high voltage MOSFET<br>Functional Block Diagram<br>1 7 D<br>VCC<br>es<br>STOP ManagementFault UVLOOFF ManagementVCC ClampVCC<br>OSP OTP OVP VDD VOVP_REF VREF<br>OVP OSP tOFF<br>ROVP 2 OVP tOFF Detection(ZCD)<br>tOFF tf VOVP_REF L_ VCC<br>Driver Supply<br>R S Clamp<br>Q<br>—_<br>3 6<br>COMP NC<br>+<br>STOP -<br>OCP - 0.8V<br>— +<br>VREF<br>GND 4 Gm +- Sample and Hold 5 CS<br>**----- End of picture text -----**<br>
2 of 15 **www.diodes.com**
AL1676 Document number: DS38290 Rev. 1 - 2
February 2016 © Diodes Incorporated
**AL1676**
**Absolute Maximum Ratings** (@TA = +25°C, unless otherwise specified.) (Note 4)
|~~es~~||||
|---|---|---|---|
|**Symbol**<br>~~es~~<br>~~ee~~|**Parameter**<br>~~ee~~|**Rating**<br>~~ee~~|**Unit**<br>~~ee~~|
|VCC<br>~~es~~<br>~~ee~~|Power Supply Voltage<br>~~ee~~|18<br>~~ee~~|V<br>~~ee~~|
|VD<br>~~ee~~|Voltage on D Pin (AL1676-20AS7-13)<br>~~ee~~|300<br>~~ee~~|V<br>~~ee~~|
||Voltage on D Pin (AL1676-30AS7-13)<br>~~a~~|300<br>~~a~~|V<br>~~a~~|
||Voltage on D Pin (AL1676-10BS7-13)<br>~~a~~|500<br>~~a~~|V<br>~~a~~|
||Voltage on D Pin (AL1676-20BS7-13)<br>~~a~~|500<br>~~a~~|V<br>~~a~~|
||Voltage on D Pin (AL1676-20CS7-13)<br>~~a~~|600<br>~~a~~|V<br>~~a~~|
||Voltage on D Pin (AL1676-40DCS7-13)<br>~~a~~|670<br>~~a~~|V<br>~~a~~|
|ID|Continuous Drain Current TC = +25°C (AL1676-20AS7-13)<br>~~ee~~|2.0<br>~~ee~~|A<br>~~ee~~|
||Continuous Drain Current TC = +25°C (AL1676-30AS7-13)<br>~~a~~|3.0<br>~~a~~|A<br>~~a~~|
||Continuous Drain Current TC = +25°C (AL1676-10BS7-13)<br>~~a~~|1.0<br>~~a~~|A<br>~~a~~|
||Continuous Drain Current TC = +25°C (AL1676-20BS7-13)<br>~~a~~|2.0<br>~~a~~|A<br>~~a~~|
||Continuous Drain Current TC = +25°C (AL1676-20CS7-13)<br>~~a~~|2.0<br>~~a~~|A<br>~~a~~|
||Continuous Drain Current TC= +25°C (AL1676-40DS7-13)<br>~~ee~~|4.0<br>~~ee~~|A<br>~~ee~~|
|VCS<br>~~a~~<br>~~es~~|Voltage on CS Pin|-0.3 to 7|V|
|VROVP<br>~~es~~<br>~~es~~|Voltage on ROVP Pin|-0.3 to 7|V|
|TJ<br>~~es~~<br>~~es~~<br>~~es~~|Operating Junction Temperature|-40 to +150|°C|
|TSTG<br>~~es~~<br>~~es~~<br>~~es~~|Storage Temperature|-65 to +150|°C|
|TLEAD<br>~~es~~<br>~~es~~<br>~~es~~|Lead Temperature (Soldering, 10 seconds)|+260|°C|
|PD<br>~~es~~<br>~~es~~<br>~~es~~|Power Dissipation and Thermal Characteristics (TA= +50°C)|0.8|W|
|JA<br>~~es~~<br>~~es~~|Thermal Resistance (Junction to Ambient) (Note 5)|123|°C/W|
|JC<br>~~es~~<br>~~a ee~~|Thermal Resistance (Junction to Case) (Note 5)<br>~~ee~~|19<br>~~ee~~|ºC/W<br>~~ee~~|
|–<br>~~ee~~|ESD (Human Body Model)<br>~~ee~~|2000<br>~~ee~~|V<br>~~ee~~|
||ESD (Machine Model)|200|V<br>~~—~~|
Notes: 4. Stresses greater than those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under “Recommended Operating Conditions” is not implied. Exposure to “Absolute Maximum Ratings” for extended periods may affect device reliability.
5. Device mounted on 1"x1" FR-4 substrate PCB, 2oz copper, with minimum recommended pad layout.
## **Recommended Operating Conditions** (@TA = +25°C, unless otherwise specified.)
|**Symbol**|**Parameter**|**Min**|**Max**|**Unit**|
|---|---|---|---|---|
|TA|Ambient Temperature (Note 6)|-40|+105|°C|
Note 6: The device can operate normally at +125°C ambient temperature under the condition that the junction temperature is less than +150°C.
3 of 15 **www.diodes.com**
AL1676 Document number: DS38290 Rev. 1 - 2
February 2016 © Diodes Incorporated
**AL1676**
**Electrical Characteristics** (@TA = +25°C, unless otherwise specified.)
|**Symbol**<br>~~ee~~|**Parameter**<br>~~ee~~|**Conditions**<br>~~ee~~|**Min**<br>~~ee~~|**Typ**<br>~~ee~~|**Max**<br>~~ee~~|**Unit**<br>~~ee~~|
|---|---|---|---|---|---|---|
|**UVLO**<br>~~eeee~~<br>~~pT~~<br>~~a~~<br>~~eeee~~|||||||
|VTH(ST)<br>~~a~~<br>~~a~~|Startup Voltage<br>~~ee~~<br>~~ee ee~~|–<br>~~ee~~<br>~~ee~~|–<br>~~ee~~|14.5<br>~~ee~~|–<br>~~ee~~|V|
|VOPR(Min)<br>~~a~~<br>~~a~~<br>~~a~~|Minimal Operating Voltage<br>~~ee ~~<br>~~ee ee~~<br>~~ee ee~~|After Turn On<br> ~~ee~~<br>~~ee~~<br>~~ee~~|–<br>~~ee~~<br>~~ee~~|8.5<br>~~ee~~|–<br>~~ee~~|V|
|VCC_CLAMP<br>~~a~~<br>~~a~~|VCC Clamp Voltage<br>~~ee ee~~<br>~~ee ee~~|ICC= 1mA<br>~~ee~~<br>~~ee~~|–<br>~~ee~~<br>~~ee~~|15.5<br>~~ee~~|–<br>~~ee~~|V|
|**Standby Current**<br>~~a~~<br>~~ee ee~~<br>~~pT~~<br>~~a~~<br>~~ee~~<br>~~eeeeee~~|||||||
|IST<br>~~a~~|Start-up Current<br>~~ee~~|VCC= VTH(ST)-0.5V,<br>Before Start up<br>~~ee~~|–<br>~~ee~~|100<br>~~ee~~|–|µA|
|ICC(OPR)<br>~~a~~<br>~~i~~<br>~~co~~|Operating Current<br>~~ee~~|Switching Frequency<br>at 5kHz<br>~~ee ~~<br>~~ee~~|–<br> ~~ee ~~<br>~~ee~~|170<br> ~~ee~~<br>~~ee~~|–<br>~~ee~~|µA|
|**Internal High Voltage MOSFET**<br>~~co~~<br>~~ee~~<br>~~eeeeee~~|||||||
|RDS(ON)<br>~~co~~|Drain-Source On-State Resistance|AL1676-20AS7-13<br>~~ee~~|–<br>~~ee~~<br>~~ee~~<br>~~ee~~|–<br>~~ee~~<br>~~ee~~<br>~~ee~~|6.5<br>~~ee~~<br>~~ee~~<br>~~ee~~|Ω|
|||AL1676-30AS7-13<br>~~ee~~|–<br>~~ee ~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|–<br> ~~ee ~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|3<br> ~~ee~~<br>~~ee~~<br>~~ee~~<br>~~ee~~||
|||AL1676-10BS7-13<br>~~ee~~|–<br>~~ee ~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|–<br> ~~ee ~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|12<br> ~~ee~~<br>~~ee~~<br>~~ee~~<br>~~ee~~||
|||AL1676-20BS7-13<br>~~ee~~|–<br>~~ee ~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|–<br> ~~ee ~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|6<br> ~~ee~~<br>~~ee~~<br>~~ee~~<br>~~ee~~||
|||AL1676-20CS7-13<br>~~ee~~|–<br>~~ee ~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|–<br> ~~ee ~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|5.5<br> ~~ee~~<br>~~ee~~<br>~~ee~~<br>~~ee~~||
|||AL1676-40DS7-13<br>~~ee~~|–<br>~~ee ~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|–<br> ~~ee ~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|2.5<br> ~~ee~~<br>~~ee~~<br>~~ee~~<br>~~ee~~||
|IDS|Continuous Drain-Source Current|AL1676-20AS7-13<br>~~ee~~|–<br>~~ee ~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|–<br> ~~ee ~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|2.0<br> ~~ee~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|A|
|||AL1676-30AS7-13<br>~~ee~~|–<br>~~ee ~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|–<br> ~~ee ~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|3.0<br> ~~ee~~<br>~~ee~~<br>~~ee~~<br>~~ee~~||
|||AL1676-10BS7-13<br>~~ee~~|–<br>~~ee ~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|–<br> ~~ee ~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|1.0<br> ~~ee~~<br>~~ee~~<br>~~ee~~<br>~~ee~~||
|||AL1676-20BS7-13<br>~~ee~~|–<br>~~ee ~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|–<br> ~~ee ~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|2.0<br> ~~ee~~<br>~~ee~~<br>~~ee~~<br>~~ee~~||
|||AL1676-20CS7-13<br>~~ee~~|–<br>~~ee ~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|–<br> ~~ee ~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|2.0<br> ~~ee~~<br>~~ee~~<br>~~ee~~<br>~~ee~~||
|||AL1676-40DS7-13<br>~~ee~~<br>~~es~~|–<br>~~ee ~~<br>~~ee~~<br>~~ee~~<br>~~ee~~<br>|–<br> ~~ee ~~<br>~~ee~~<br>~~ee~~<br>~~ee~~<br>|4.0<br> ~~ee~~<br>~~ee~~<br>~~ee~~<br>~~ee~~<br>||
|VDS|Drain-Source Voltage|AL1676-20AS7-13<br>~~ee~~<br>~~es~~<br>~~es~~|300<br>~~ee ~~<br>~~ee~~<br>~~ee~~<br>~~eee~~<br>|–<br> ~~ee ~~<br>~~ee~~<br>~~ee~~<br>~~eee~~<br>|–<br> ~~ee~~<br>~~ee~~<br>~~ee~~<br>~~ee~~<br>|V|
|||AL1676-30AS7-13<br>~~es~~<br>~~es~~<br>~~es~~|300<br>~~ee~~<br>~~eee~~<br>~~eee~~<br>|–<br>~~ee~~<br>~~eee~~<br>~~eee~~<br>|–<br>~~ee~~<br>~~ee~~<br>~~ee~~<br>||
|||AL1676-10BS7-13<br>~~es ~~<br>~~es~~<br>~~es~~<br>~~es~~|500<br>~~ee ~~<br> ~~eee~~<br>~~eee~~<br>~~eee~~<br>|–<br> ~~ee ~~<br>~~eee~~<br>~~eee~~<br>~~eee~~<br>|–<br> ~~ee~~<br>~~ee~~<br>~~ee~~<br>~~ee~~<br>||
|||AL1676-20BS7-13<br> <br>~~es ~~<br>~~es~~<br>~~es~~<br>~~es~~|500<br> ~~eee~~<br> ~~eee~~<br>~~eee~~<br>~~eee~~<br>|–<br>~~eee ~~<br>~~eee~~<br>~~eee~~<br>~~eee~~<br>|–<br> ~~ee~~<br>~~ee~~<br>~~ee~~<br>~~ee~~<br>||
|||AL1676-20CS7-13<br> <br>~~es ~~<br>~~es~~<br>~~es~~<br>~~a~~|600<br> ~~eee~~<br> ~~eee~~<br>~~eee~~<br>~~eee~~<br>|–<br>~~eee ~~<br>~~eee~~<br>~~eee~~<br>~~eee~~<br>|–<br> ~~ee~~<br>~~ee~~<br>~~ee~~<br>~~ee~~<br>||
|||AL1676-40DS7-13<br> <br>~~es ~~<br>~~es~~<br>~~a~~<br>~~es~~|650<br> ~~eee~~<br> ~~eee~~<br>~~eee~~<br>~~eee~~<br>|–<br>~~eee ~~<br>~~eee~~<br>~~eee~~<br>~~eee~~<br>|–<br> ~~ee~~<br>~~ee~~<br>~~ee~~<br>~~ee~~<br>||
|IDSS|Drain-Source Leakage Current|AL1676-20AS7-13<br> <br>~~es ~~<br>~~a ~~<br>~~es~~<br>~~a~~|–<br> ~~eee~~<br> ~~eee~~<br> ~~eee~~<br>~~eee~~|–<br>~~eee ~~<br>~~eee ~~<br>~~eee~~<br>~~eee~~|1<br> ~~ee~~<br> ~~ee~~<br>~~ee~~<br>~~ee~~|µA|
|||AL1676-30AS7-13<br> <br>~~es~~<br>~~a~~<br>~~es~~|–<br> ~~eee~~<br>~~eee~~<br>~~eee~~<br>|–<br>~~eee~~<br>~~eee~~<br>~~eee~~<br>|1<br>~~ee~~<br>~~ee~~<br>~~ee~~<br>||
|||AL1676-10BS7-13<br> <br>~~es ~~<br>~~a~~<br>~~es~~<br>~~es~~|–<br> ~~eee~~<br> ~~eee~~<br>~~eee~~<br>~~**eee**~~|–<br>~~eee ~~<br>~~eee ~~<br>~~eee~~<br>~~**eee**~~|1<br> ~~ee~~<br> ~~ee~~<br>~~ee~~<br>~~**ee**~~||
|||AL1676-20BS7-13<br>~~es~~<br>~~es~~|–<br>~~eee~~<br>~~**eee**~~|–<br>~~eee~~<br>~~**eee**~~|1<br>~~ee~~<br>~~**ee**~~||
|||AL1676-20CS7-13<br>~~es ~~<br>~~es~~|–<br>~~eee~~<br> ~~**eee**~~<br>~~ee~~|–<br>~~eee ~~<br>~~**eee**~~<br>~~ee~~|1<br> ~~ee~~<br>~~**ee**~~<br>~~ee~~||
|||AL1676-40DS7-13<br> <br>~~es~~<br>~~ee~~|–<br> ~~**eee**~~<br>~~ee~~<br>~~ee~~|–<br>~~**eee** ~~<br>~~ee~~<br>~~ee~~|1<br> ~~**ee**~~<br>~~ee~~<br>~~ee~~||
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AL1676 Document number: DS38290 Rev. 1 - 2
February 2016 © Diodes Incorporated
**AL1676**
## **Electrical Characteristics** (@TA = +25°C, unless otherwise specified.) (Cont.)
|**Symbol**<br>~~Cn~~|**Parameter**<br>~~Cn~~|**Conditions**|**Min**|**Typ**|**Max**|**Unit**|
|---|---|---|---|---|---|---|
|**ROVP**<br>~~Cn~~<br>~~es~~<br>~~rn tnI~~<br>~~II~~|||||||
|VROVP<br>~~Cn~~<br>~~es~~<br>~~Cn~~|Reference Voltage of ROVP Pin<br>~~Cn~~<br>~~rn tn~~<br>~~Cn~~|–<br>~~tn~~|–<br>~~I~~|0.5<br>~~I~~|–<br>~~I~~|V|
|**Current Sense**<br>~~es~~<br>~~rn tn I~~<br>~~I I~~<br>~~Cn~~<br>~~es~~<br>~~ne~~<br>~~rrI~~<br>~~nnI~~|||||||
|VREF<br>~~Cn~~<br>~~es~~<br>~~es~~|Internal Reference Voltage<br>~~Cn~~<br>~~ne~~<br>~~re~~|–<br>~~rr~~<br>~~ns~~|–<br>~~I~~<br>~~Gt~~|0.400<br>~~nn~~|–<br>~~I~~|V|
|VCS_CLAMP<br>~~es~~<br>~~es~~<br>~~es~~|VCS Clamp Voltage<br>~~ne~~<br>~~re~~<br>~~rr~~|–<br>~~rr ~~<br>~~ns~~<br>~~nn~~|–<br> ~~I~~<br>~~Gt~~<br>~~ts Gs~~|0.8<br>~~nn ~~<br>~~Gs~~|–<br> ~~I~~|V|
|tON_MIN<br>~~es~~<br>~~es~~<br>~~es~~|Minimum tON<br>~~re ~~<br>~~rr~~<br>~~rr~~|–<br> ~~ns ~~<br>~~nn~~<br>~~nn~~|–<br> ~~Gt~~<br>~~ts Gs~~<br>~~ts Gs~~|550<br>~~Gs~~<br>~~Gs~~|–|ns|
|tON_MAX<br>~~es~~<br>~~es~~<br>~~es~~|Maximum tON<br>~~rr~~<br>~~rr~~<br>~~rr~~|–<br>~~nn ~~<br>~~nn~~<br>~~nn~~|–<br> ~~ts Gs~~<br>~~ts Gs~~<br>~~ts Gs~~|29<br>~~Gs~~<br>~~Gs~~<br>~~Gs~~|–|µs|
|tOFF_MAX<br>~~es~~<br>~~es~~<br>~~es~~|Maximum tOFF<br>~~rr~~<br>~~rr~~<br>~~re~~|–<br>~~nn ~~<br>~~nn~~<br>~~es~~|–<br> ~~ts Gs~~<br>~~ts Gs~~<br>~~ts Gs~~|180<br>~~Gs~~<br>~~Gs~~<br>~~Gs~~|–|µs|
|tOFF_MIN<br>~~es~~<br>~~es~~<br>~~Cn~~|Minimum tOFF(Note 7)<br>~~rr~~<br>~~re~~<br>~~Cn~~|–<br>~~nn ~~<br>~~es~~|–<br> ~~ts Gs~~<br>~~ts Gs~~|6<br>~~Gs~~<br>~~Gs~~|–|µs|
|**Error Amplifier**<br>~~es~~<br>~~re es ts Gs~~<br>~~Cn~~<br>~~esee~~<br>~~rnts Gs~~|||||||
|Gm<br>~~Cn~~<br>~~es~~<br>~~es~~|Gm Trans-conductance<br>~~Cn~~<br>~~ee~~<br>~~rrr~~|–<br>~~rn~~<br>~~rrr~~|–<br>~~ts Gs~~<br>~~ts~~|25<br>~~Gs~~|–|µA/V|
|ISOURCE<br>~~es ~~<br>~~es~~<br>~~es~~|Amplifier Source Current<br> ~~ee~~<br>~~rrr~~<br>~~rs~~|–<br>~~rn ~~<br>~~rrr~~<br>~~rn~~|–<br> ~~ts Gs~~<br>~~ts~~<br>~~ts Gs~~|10<br>~~Gs~~<br>~~Gs~~|–|µA|
|ISINK<br>~~es~~<br>~~es~~|Amplifier Sink Current<br>~~rrr~~<br>~~rs~~|–<br>~~rrr ~~<br>~~rn~~|–<br> ~~ts~~<br>~~ts Gs~~|9<br>~~Gs~~|–|µA|
|**Thermal Foldback and Over Temperature Protection**<br>~~es~~<br>~~rs~~<br>~~rn ts Gs~~<br>~~ee~~<br>~~rs~~<br>~~rrtn~~|||||||
|TREG<br>~~ee~~<br>~~ey~~|Overheating Temperature<br>Regulation(Note7)<br>~~rs~~<br>~~nt~~|–<br>~~rr~~<br>~~nt~~|–<br>~~tn~~<br>~~I~~|+150<br>~~I~~|–|°C|
|–<br>~~ee~~<br>~~ey~~|Shutdown Temperature (Notes 7, 8)<br>~~rs~~<br>~~nt~~|–<br>~~rr ~~<br>~~nt~~|–<br> ~~tn~~<br>~~I~~|+170<br>~~I~~|–|°C|
- Notes: 7. These parameters, although guaranteed by design, are not 100% tested in production.
8. The device will latch off when OTP happens, recovered after power cycle and device won’t operating normally at this temperature.
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AL1676 Document number: DS38290 Rev. 1 - 2
February 2016 © Diodes Incorporated
**AL1676**
## **Performance Characteristics** (Note 9)
## **Start-up Voltage vs. Ambient Temperature Start-up Current vs. Ambient Temperature**
**==> picture [204 x 365] intentionally omitted <==**
**----- Start of picture text -----**<br>
16. 0<br>15. 5<br>|<br>15. 0<br>14. 5<br>|<br>14. 0<br>13. 5 Ps|<br>13. 0 Ppt<br>12. 5 |Pp EF<br>12.-40 0 | -20 0 20 40 60 80 100 120<br>Ambient Temperature (oC)<br>10.0<br>9.5 |<br>9.0<br>|<br>8.5<br>8.0<br>PET eee Te<br>7.5 |<br>7.0 ee<br>6.5<br>pj | ft | Tt Tt<br>6.0<br>-40 SSE -20 0 20 40 60 80 100 120<br>Ambient Temperature (oC)<br>Start-up Voltage (V)<br>Minimal Operating Voltage (V)<br>**----- End of picture text -----**<br>
**==> picture [196 x 151] intentionally omitted <==**
**----- Start of picture text -----**<br>
19 0<br>18 0<br>Pt tt tt | yd<br>17 0<br>pat<br>16 0<br>Pir| |<br>15 0<br>ne<br>14 0<br>Pt [ttt] | | ty<br>13-40 0 FETT -20 0 20 40 TTT 60 80 tt 100 120<br>Ambient Temperature (oC)<br>A)<br><br>Start-up Current (<br>**----- End of picture text -----**<br>
## **Minimal Operating Voltage vs. Ambient Temperature Operating Current vs. Ambient Temperature**
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**----- Start of picture text -----**<br>
191817 000 TLLLLLLLIel<br>16 0<br>i<br>1514 00 rr[| t t<br>Pt tt [tt]<br>13 0<br>Pit tt | tT ttey<br>12-40 0 eee -20 0 20 40 60 80 100 120<br>Ambient Temperature (oC)<br>ROVP Reference vs. Ambient Temperature Reference vs. Ambient Temperature<br>0.6 0<br>0.5 5<br>0.5 0 eelptt tty<br>0.4 5<br>0.4 0 EEE<br>0.3 5<br>0.3-40 0 -20 0 20 40 60 80 100 120<br>Ambient Temperature (oC)<br> Reference (V)<br>ROVP<br>V<br>A)<br><br>Operating Current (<br>**----- End of picture text -----**<br>
## **VREF vs. Ambient Temperature VROVP Reference vs. Ambient Temperature Reference vs. Ambient Temperature**
**==> picture [199 x 151] intentionally omitted <==**
**----- Start of picture text -----**<br>
0.5 0<br>0.4 5<br>0.4 0 aFi att eett |<br>0.3 5<br>0.3 0 PCC]<br>0.2 5<br>0.2-40 0 -20 0 20 40 60 80 100 120<br>Ambient Temperature (oC)<br> (V)<br>REF<br>V<br>**----- End of picture text -----**<br>
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AL1676 Document number: DS38290 Rev. 1 - 2
February 2016 © Diodes Incorporated
**AL1676**
## **Performance Characteristics** (Cont.) (Note 9)
**VCC Clamp Voltage vs. Ambient Temperature VREF vs. Ambient Temperature**
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**----- Start of picture text -----**<br>
2 4 0.5 0<br>0.4 5<br>2 1<br>TT TTT Tt 0.4 0 Pe<br>0.3 5<br>1 8 Pi; ttt Et yl CHEE EEE<br>0.3 0<br>1 5 PP 0.2 5 FERFEEEEE<br>0.2 0<br>1 2<br>0.1 5 EE<br>it} [+t] A<br>9 0.1 0<br>0.0 5<br>6<br>-40 FEEpftit -20 0 Ambient Temperature (20 40 ft} 60 oC)80 tt 100 120 2 0.0-40 0 EREEREEEEoEEEE -20 0 20Ambient Temperature (40 60 80 100oC)120 Ht 140 160 180<br>VCC Clamp Voltage (V)<br> (V)<br>REF<br>V<br>**----- End of picture text -----**<br>
Note 9: These electrical characteristics are tested under DC condition. The ambient temperature is equal to the junction temperature of the device.
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AL1676 Document number: DS38290 Rev. 1 - 2
February 2016 © Diodes Incorporated
**AL1676 Functional Description and Application Information Convertor Operation** The AL1676 is a high efficiency and high power factor BUCK LED driver solution for universal input application based on single winding inductor. It is available for 6 internal MOSFET options (300V/2A, 300V/3A, 500/1A, 500V/2A, 600V/2A, 650V/4A) which can help to reduce the overall LED driver solution size of the LED lamp. This 6 MOSFET options can cover most of the 3~18W applications. High power factor (PF) is achieved by constant on-time control. Coupled with simple closed loop of constant current control, the AL1676 can achieve good line and load regulation. The AL1676 adopts source-driver technique to decrease the system operating current. It uses a novel method to detect the tOFF time which helps to get rid of an auxiliary winding for (VCC supply and) detecting the tOFF time, resulting in an extremely low bill material (BOM). The AL1676 operates at boundary conduction mode (BCM) which can ease EMI design. L1 C5 R1 D1 R4 ~~+~~ OUT F1 L2 AC R2 Input DB1 C1 C2 VR U1 AL1676 VCC D ROVP COMP NC GND CS C3 R3 C4 R5 | ~~tea~~ Figure 1. Typical Application Circuit **Start-up and Supply Voltage** Before start-up, the VCC capacitor C3 is charged by the startup resistors (R1, R2) from the high voltage mains. When the start-up voltage is reached, the AL1676 starts switching. During normal operation, the VCC supply is provided by start-up resisters (R1, R2) and internal source driver circuit.
The AL1676 has an internal VCC clamp voltage (typical 15.5V), which is limited by one internal active Zener diode.
When VCC voltage drops to below the under voltage lockout (UVLO), switching stops, the IC can restart when the voltage on VCC pin is exceeding the startup voltage (VTH(ST)).
## **Protections**
## **Under Voltage Lockout (UVLO)**
When the voltage on the VCC pin drops to below VOPR(Min), the IC stops switching. The IC can restart when the voltage on VCC exceeds the startup voltage (VTH(ST))
## **Leading-Edge Blanking (LEB)**
To prevent false detection of the peak current of the inductor, a blanking time following switch-on is designed. When the internal switch turns on, a short current spike can occur because of the capacitive discharge of the voltage over the drain and source. It is disregarded during the LEB time (tON_MIN).
## **Cycle-by-cycle Over Current Protection (OCP)**
The AL1676 has a built-in peak current detector. It triggers when the voltage on CS pin reaches the peak level VCS_CLAMP. The R5 is connected to the CS pin to sense the current of the inductor. The maximum peak current (IPEAK(MAX)) of the inductor can be calculated as below:
**==> picture [173 x 25] intentionally omitted <==**
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AL1676 Document number: DS38290 Rev. 1 - 2
February 2016
© Diodes Incorporated
**AL1676**
## **Functional Description and Application Information** (Cont.)
The detection circuit is activated after the LEB time. When the detection circuit sense the CS voltage is higher than 1V, the IC will turn off the switch to limit the output current. It automatically provides protection for the maximum LED current during operation. A propagation delay exists between over current detection and actual source-switch off, so the actual peak current is a little higher than the OCP level set by the R5.
## **Over-Voltage Protection and Output-Open Protection (OVP)**
The AL1676 has output open voltage protection when the LED is open, which can prevent the output voltage from increasing to a very high value. This feature can help the system designer to select a smaller volume capacitor. The output voltage is set by the external resistor R3 shown in Figure 1.
When LED is open, the tOFF_OVP time can be calculated as:
**==> picture [159 x 26] intentionally omitted <==**
Where,
VOVP is the output open voltage.
VCS is the voltage on the CS pin when OVP happens.
The output voltage is set by R3, and R3 is calculated as:
**==> picture [253 x 25] intentionally omitted <==**
Where, VROVP_REF is the internal ROVP pin 0.5V’s reference, CREF is the internal 6pF capacitor.
## **Output-Short Protection (OSP)**
When LED is shorted, the device cannot detect the tOFF time, and the device controls the system operating at 5kHz low switching frequency.
## **Thermal Foldback Protection (TFP)**
The AL1676 has a thermal foldback function and adopts self-adaptive control method, which can prevent the system from breaking down caused by high temperature. The overheating temperature is set at +150°C typical, when the junction temperature of the IC is higher than +150°C typical, the device will linearly decrease the internal reference voltage to decrease the output current. As a result of this feature, the device can control the system’s output power at high ambient temperature, to control the quantity of heat of the system. This enhances the safety of the system at high temperature.
The thermal foldback waveform is shown below:
Figure 2. Thermal Foldback Waveform
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AL1676 Document number: DS38290 Rev. 1 - 2
February 2016 © Diodes Incorporated
**==> picture [564 x 544] intentionally omitted <==**
The AL1676 has OTP protection function. When the junction temperature reaches +170°C typical, the IC will trigger an over-temperature protection condition which causes the device to shut down and latch. Once OTP has triggered, the system will resume after the system’s input power supply has been reset and power up.
VREF is the internal reference, typical 0.4V, R5 is the current sense resistor.
So we can get the output current equation as below,
**==> picture [147 x 23] intentionally omitted <==**
## **Inductance Selection (L1)**
In buck structure, the peak current of the inductor can be calculated as below,
**==> picture [275 x 36] intentionally omitted <==**
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AL1676 Document number: DS38290 Rev. 1 - 2
February 2016 © Diodes Incorporated
**AL1676** [
## **Functional Description and Application Information** (Cont.)
The AL1676 controls the system operating at boundary conduction mode which results in its operating frequency inconstant. To set the minimum switching frequency fMIN at the crest of the minimum AC input.
**==> picture [183 x 27] intentionally omitted <==**
According to the Faraday’s Law of Induction, the winding number of the inductance can be calculated by:
**==> picture [146 x 24] intentionally omitted <==**
Where,
Ae is the core effective area.
Bm is the maximum magnetic flux density.
The AL1676 has designed the minimum tON time and maximum tON time, the tON_MIN is about 700ns and the tON_MAX time is about 29µs. In buck topology there is the equation VIN_RMS-VO=L*IPEAK/tON. If the inductance is too small, it will make tON smaller than tON_MIN, the device cannot detect the peak current of the system, resulting in incorrect output current. If the inductance is too large, make tON longer than the tON_MAX, the system’s output current will decrease because of the limit of the tON_MAX.
The AL1676 has also the limitation of minimum tOFF time and maximum tOFF time, the tOFF_MIN time is about 6µs and tOFF_MAX time is about 180µs. In buck topology there is the equation VO=L*IPEAK/tOFF. If the inductance is too small, make tOFF smaller than tOFF_MIN, the system will enter DCM mode, and the output current will be incorrect. If the inductance is too large, make tOFF longer than tOFF_MAX, the system will enter CCM mode, and the output current will also be incorrect. So a suitable value of the inductance is very important.
Consider these parameters, two examples of the typical application inductance is recommended as below:
|System spec|Inductance Value|System Frequency|tON_MIN|tOFF|
|---|---|---|---|---|
|60V/100mA (85~265VAC)|2.2mH|64KHz(230 VAC)|2.4µs (265 VAC)|12.6µs|
|42V/150mA (85~265 VAC)|1.1mH|64KHz(230 VAC)|1.6µs (265 VAC)|13.5µs|
## **Recommended Applications**
The AL1676 integrates different MOSFET to adapt different wattage application. The output current is limited by the integrated MOSFET, and the SO-7 package’s heat dissipation capability. The minimum output voltage is limited by the LEB time, and the minimum output voltage is recommended to 20V. The recommended application is given below:
|**Device**|**Output Power Coverage **|**Maximum Output Current**|**Minimum Output Voltage **|
|---|---|---|---|
|AL1676-20A|≤10W|≤200mA|20V|
|AL1676-30A|≤13W|≤300mA|20V|
|AL1676-10B|≤7W|≤120mA|20V|
|AL1676-20B|≤10W|≤200mA|20V|
|AL1676-20C|≤10W|≤200mA|20V|
|AL1676-40D|≤18W|≤350mA|20V|
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AL1676 Document number: DS38290 Rev. 1 - 2
February 2016 © Diodes Incorporated
**AL1676 Ordering Information AL1676** – **XX X XX** – **13** Current Option MOSFET Voltage Package Packing 10 : 1.0A A: 300V S7 : SO-7 13 :13" Tape & Reel 20 : 2.0A B: 500V 30 : 3.0A C: 600V 40 : 4.0A D: 650V **13” Tape and Reel Part Number Package code Package Quantity Part Number Suffix** AL1676-20AS7-13 S7 SO-7 4000/Tape & Reel -13 AL1676-30AS7-13 S7 SO-7 4000/Tape & Reel -13 AL1676-10BS7-13 S7 SO-7 4000/Tape & Reel -13 AL1676-20BS7-13 S7 SO-7 4000/Tape & Reel -13 ~~—~~ AL1676-20CS7-13 S7 SO-7 4000/Tape & Reel -13 AL1676-40DS7-13 S7 SO-7 4000/Tape & Reel -13
## **Marking Information**
|||||**(Top View)**|**(Top View)**|**(Top View)**|**(Top View)**|**(Top View)**||||
|---|---|---|---|---|---|---|---|---|---|---|---|
||||7||||6||5|||
||Logo||||||||||YY: Year : 15,16,17 ~|
|Part Number||||**1676- XXX**|||||||WW: Week : 01~52; 52|
|1676-20A for 2.0A/300V<br>1676-30A for 3.0A/300V|1676-20A for 2.0A/300V<br>1676-30A for 3.0A/300V|||**YY WW X X**|||||||X X: Internal Code<br>represents 52 and 53 week|
|1676-10B for 1.0A/500V|1676-10B for 1.0A/500V|||||||||||
|1676-20B for 2.0A/500V|1676-20B for 2.0A/500V|||||||||||
|1676-20C for 2.0A/600V|1676-20C for 2.0A/600V||1||2||3||4|||
|1676-40D for 4.0A/650V|1676-40D for 4.0A/650V|||||||||||
12 of 15 **www.diodes.com**
AL1676 Document number: DS38290 Rev. 1 - 2
February 2016 © Diodes Incorporated
**AL1676**
## **Package Outline Dimensions** (All dimensions in mm.)
## **(1) Package Type: SO-7**
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**----- Start of picture text -----**<br>
5.800(0.228)<br>1.350(0.053)<br>6.200(0.244) 1.750(0.069)<br>0.330(0.013 )<br>0.510(0.020 )<br>| on<br>_— 2.54(0.100) --ul<br>TYP 4.700(0.185)<br>5.100(0.201)<br>1.270(0.050)<br>TYP<br>| _=o| te<br>|<br>a 0.0800.250(0.010)(0.003)<br>3.800(0.150) 1.250(0.049)<br>4.000(0.157) 1.500(0.059)<br>0.350(0.014)<br>TYP<br>45°<br>0.450(0.017) 0.150(0.006)<br>Option 1 0.800(0.031) 0.250(0.010)<br>Option 2<br>0 °<br>8 °<br>**----- End of picture text -----**<br>
Note: Eject hole, oriented hole and mold mark is optional.
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AL1676 Document number: DS38290 Rev. 1 - 2
February 2016 © Diodes Incorporated
**AL1676**
## **Suggested Pad Layout**
## **(1) Package Type: SO-7**
|||||E||||||Z<br>G<br>E1<br>X<br>Y<br>~~il~~|Z<br>G<br>E1<br>X<br>Y<br>~~il~~|Z<br>G<br>E1<br>X<br>Y<br>~~il~~|Z<br>G<br>E1<br>X<br>Y<br>~~il~~|Z<br>G<br>E1<br>X<br>Y<br>~~il~~|||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|Dimensions|Z<br>(mm)/(inch)|||G<br>(mm)/(inch)||||||X<br>(mm)/(inch)|||Y<br>(mm)/(inch)||E<br>(mm)/(inch)|E1<br>(mm)/(inch)|
|Value|6.900/0.272|||3.900/0.154||||||0.650/0.026|||1.500/0.059|1.500/0.059|1.270/0.050|2.540/0.100|
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AL1676 Document number: DS38290 Rev. 1 - 2
February 2016 © Diodes Incorporated
**AL1676 IMPORTANT NOTICE** DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS DOCUMENT, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION). Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes without further notice to this document and any product described herein. Diodes Incorporated does not assume any liability arising out of the application or use of this document or any product described herein; neither does Diodes Incorporated convey any license under its patent or trademark rights, nor the rights of others. Any Customer or user of this document or products described herein in such applications shall assume all risks of such use and will agree to hold Diodes Incorporated and all the companies whose products are represented on Diodes Incorporated website, harmless against all damages. Diodes Incorporated does not warrant or accept any liability whatsoever in respect of any products purchased through unauthorized sales channel. Should Customers purchase or use Diodes Incorporated products for any unintended or unauthorized application, Customers shall indemnify and hold Diodes Incorporated and its representatives harmless against all claims, damages, expenses, and attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized application. Products described herein may be covered by one or more United States, international or foreign patents pending. Product names and markings noted herein may also be covered by one or more United States, international or foreign trademarks. This document is written in English but may be translated into multiple languages for reference. Only the English version of this document is the final and determinative format released by Diodes Incorporated. **LIFE SUPPORT** Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or systems without the express written approval of the Chief Executive Officer of Diodes Incorporated. As used herein: A. Life support devices or systems are devices or systems which: |_| 1. are intended to implant into the body, or 2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided in the labeling can be reasonably expected to result in significant injury to the user. B. A critical component is any component in a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or to affect its safety or effectiveness. Customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support devices or systems, and acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products and any use of Diodes Incorporated products in such safety-critical, life support devices or systems, notwithstanding any devices- or systems-related information or support that may be provided by Diodes Incorporated. Further, Customers must fully indemnify Diodes Incorporated and its representatives against any damages arising out of the use of Diodes Incorporated products in such safety-critical, life support devices or systems. Copyright © 2016, Diodes Incorporated **www.diodes.com**[i]
2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided in the labeling can be reasonably expected to result in significant injury to the user.
Customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support devices or systems, and acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products and any use of Diodes Incorporated products in such safety-critical, life support devices or systems, notwithstanding any devices- or systems-related information or support that may be provided by Diodes Incorporated. Further, Customers must fully indemnify Diodes Incorporated and its representatives against any damages arising out of the use of Diodes Incorporated products in such safety-critical, life support devices or systems.
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AL1676 Document number: DS38290 Rev. 1 - 2
February 2016 © Diodes Incorporated
Updated at February 9, 2023
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