component
AL1666S-13
Public Made by Adomby adom
Diodes Incorporated LED Drivers, SO-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownAL1666S-13
Diodes Incorporated · LED Drivers · SO-8
AL1666S-13 from Diodes Incorporated, in a SO-8. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | ADIM | input | Analog dimming input: a 0 to 2.4V DC signal sets the output current from 1% to 100%, and the absolute maximum voltage to GND is -0.3 to 7 V. |
| 2 | PWMD | input | PWM signal input for PWM-to-DC dimming, with a low threshold of 0.4 V maximum, a high threshold of 2.0 V minimum, and an absolute maximum voltage to GND of -0.3 to 7 V. |
| 3 | COMP | passive | Loop compensation pin, where a CCOMP of 1µF to 2µF is recommended and its startup pre-charge voltage is programmed by RCOMP, with an absolute maximum of -0.3 to 7 V. |
| 4 | CS | input | Current sense pin connected to the source of the primary switch, with an absolute maximum of -0.3 to 7 V to GND and a primary current clamp voltage of 2 V. |
| 5 | GND | power_in | Ground reference; all voltages in the datasheet are measured with respect to GND. |
| 6 | OUT | output | Gate driver output with an absolute maximum of -0.3 to 20 V and an output clamp voltage of 9.8 V minimum to 15.5 V maximum at VCC = 20 V. |
| 7 | VCC | power_in | Supply voltage for the gate driver and control circuits, with a recommended operating range of 8.5 V up to VCC_OVP (minimum 21.8 V) and an absolute maximum of -0.3 to 30 V. |
| 8 | FB | input | Feedback voltage sensing from the auxiliary winding, with an absolute maximum of -0.3 to 7 V and an FB constant-voltage threshold of 2.86 V to 3.26 V (typical 3.0 V). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Diodes Incorporated |
| Package | SO-8 |
| Category | LED Drivers |
| Pins | 8 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Power Supply Voltage | VCC | -0.3 | 30 | V | 3 | ||
| Voltage at CS to GND | VCS | -0.3 | 7 | V | 3 | ||
| FB Input | VFB | -0.3 | 7 | V | 3 | ||
| Loop Compensation Pin | VCOMP | -0.3 | 7 | V | 3 | ||
| Driver Output Voltage | VOUT | -0.3 | 20 | V | 3 | ||
| Voltage at PWMD to GND | VPWMD | -0.3 | 7 | V | 3 | ||
| Voltage at ADIM to GND | VADIM | -0.3 | 7 | V | 3 | ||
| Operating Junction Temperature | TJ | -40 | 150 | °C | 3 | ||
| Storage Temperature | TSTG | -65 | 150 | °C | 3 | ||
| Lead Temperature (Soldering, 10s) | TLEAD | 300 | °C | 3 | |||
| Power Dissipation | PD | 0.65 | W | at TA = +50°C | 3 | ||
| ESD (Human Body Model) | 2000 | V | 3 | ||||
| ESD (Charged-Device Model) | 1000 | V | 3 | ||||
| Thermal Resistance (Junction to Ambient) | θJA | 136 | °C/W | 3 | |||
| Thermal Resistance (Junction to Case) | θJC | 30 | °C/W | 3 | |||
| Ambient Temperature (Note 5) | TA | -40 | 105 | °C | 4 | ||
| Operating VCC Voltage (Note 6) | VCC | 8.5 | V | 4 | |||
| Startup Threshold Voltage | VCC_TH | 15.8 | 18.5 | 19.5 | V | 4 | |
| Minimal Operating Voltage After Turn On | VOPR_MIN | 5.8 | 7.8 | 9 | V | 4 | |
| VCC OVP Voltage | VCC_OVP | 21.8 | 25 | 29.5 | V | 4 | |
| Startup Current | IST | 120 | 300 | µA | VCC=VCC_TH -0.5V, before start up | 4 | |
| Operating Current @4kHz | ICC | 2 | 4 | mA | VCC=20V, VDIM=3V, VFB=VCS=VCOMP=1V, COUT=1nF | 4 | |
| Shunt Current in OVP Mode | ICC_OVP | 3.1 | mA | VCC > VCC_OVP | 4 | ||
| Output Clamp Voltage | VOUT_CLAMP | 9.8 | 12 | 15.5 | V | VCC = 20V | 4 |
| Minimum On Time (Note 7) | tON_MIN | 1000 | 2010 | ns | 4 | ||
| Maximum Off Time | tOFF_MAX | 290 | 405 | µs | 4 | ||
| Internal Reference Voltage | VREF | 0.394 | 0.4 | 0.406 | V | 4 | |
| FB CV Threshold | VFB_CV | 2.86 | 3 | 3.26 | V | 4 | |
| PWM Signal Low Threshold Voltage | VPWM_L | 0.4 | V | 4 | |||
| PWM Signal High Threshold Voltage | VPWM_H | 2 | V | 4 | |||
| PWM Frequency for PWM to DC Dimming | fPWM | 0.5 | 20 | kHz | 4 | ||
| Analog Dimming Range on ADIM | 0.05 | 2.4 | V | 5 | |||
| Analog Dimming High Level | 2.35 | 2.4 | 2.45 | V | 5 | ||
| Analog Dimming Range Ratio | 1 | 100 | % | 5 |
CAD (KiCad official)
- Symbol:
AL1666S-13 - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SO-8 (KiCad packages3D, STEP)
- 3D model files:
al1666s-13-etched.step/al1666s-13-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);al1666s-13.step/al1666s-13.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Diodes Incorporated datasheet (16 pp, sha256
1cd69d9ea65a7de9, retrieved 2026-10-18, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-sonnet-5-5(agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish. - CAD: KiCad official libraries (CC-BY-SA 4.0).