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AL1666AS-13

Public Made by Adom

by adom

Diodes Incorporated LED Drivers, SO-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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AL1666AS-13

Diodes Incorporated · LED Drivers · SO-8

AL1666AS-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 accepting 0.05V to 2.4V DC for analog dimming (1% to 100%), or tied to a capacitor of hundreds of nF in PWM-to-DC dimming mode; absolute max -0.3 to 7V.
2 PWMD input PWM signal input for PWM-to-DC dimming with low threshold max 0.4V, high threshold min 2.0V, and 0.5kHz to 20kHz frequency range; absolute max -0.3 to 7V.
3 COMP passive Loop compensation pin where a CCOMP capacitor (1µF to 2µF recommended) is connected and RCOMP programs the startup pre-charge voltage; absolute max -0.3 to 7V.
4 CS input Current sense pin connected to the source of the primary switch, with 0.4V reference, 2V cycle-by-cycle clamp, and 3V over-current trigger; absolute max -0.3 to 7V.
5 GND power_in Ground reference pin for the device.
6 OUT output Gate driver output to the primary switch, clamped at typically 12V and with absolute max -0.3 to 20V.
7 VCC power_in Supply voltage for the gate driver and control circuits, operating range 8.5V to 23V with startup threshold typically 15V and absolute max 30V.
8 FB input Feedback voltage sensing input from the auxiliary winding via a divider, with FB CV/OVP threshold typically 3.0V and absolute max -0.3 to 7V.

Key specifications

Parameter Value
Manufacturer Diodes Incorporated
Package SO-8
Category Nixie Tube Driver/LED Driver
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
Startup Threshold Voltage VCC_TH 13.4 15 16.5 V 5
Minimal Operating Voltage After Turn On VOPR_MIN 5.8 7.8 9 V 5
Startup Current IST 120 300 µA VCC = VCC_TH -0.5V, before Start Up 5
Operating Current @4kHz ICC 2 4 mA VCC = 20V, VDIM = 3V, VFB = VCS = VCOMP = 1V, COUT = 1nF 5
Output Clamp Voltage VOUT_CLAMP 9.8 12 15.5 V VCC = 20V 5
Minimum On Time tON_MIN 1000 2010 ns 5
Maximum Off Time tOFF_MAX 290 405 µs 5
Internal Reference Voltage VREF 0.394 0.4 0.406 V TA = +25°C 5
Internal Reference Voltage VREF 0.392 0.4 0.415 V TA = -40°C to +105°C 5
FB CV Threshold VFB_CV 2.86 3 3.26 V 5
PWM Signal Low Threshold Voltage VPWM_L 0.4 V 5
PWM Signal High Threshold Voltage VPWM_H 2 V 5
PWM Frequency for PWM to DC Dimming fPWM 0.5 20 kHz 5
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
Ambient Temperature TA -40 105 °C 4
Operating VCC Voltage VCC 8.5 23 V ICC should be limited less than 5mA 4
Power Supply Voltage VCC -0.3 30 V TA = +25°C 4
Voltage at CS to GND VCS -0.3 7 V TA = +25°C 4
FB Input VFB -0.3 7 V TA = +25°C 4
Loop Compensation Pin VCOMP -0.3 7 V TA = +25°C 4
Driver Output Voltage VOUT -0.3 20 V TA = +25°C 4
Voltage at PWMD to GND VPWMD -0.3 7 V TA = +25°C 4
Voltage at ADIM to GND VADIM -0.3 7 V TA = +25°C 4
Operating Junction Temperature TJ -40 150 °C TA = +25°C 4
Storage Temperature TSTG -65 150 °C TA = +25°C 4
Lead Temperature (Soldering, 10s) TLEAD 300 °C TA = +25°C 4
Power Dissipation PD 0.65 W at TA = +50°C 4
ESD (Human Body Model) 2000 V 4
CDM (Charged-Device Model) 1000 V 4
Thermal Resistance (Junction to Ambient) θJA 136 °C/W 4
Thermal Resistance (Junction to Case) θJC 30 °C/W 4
Output Voltage Rise Time tR 100 ns CL = 1nF 5
Output Voltage Fall Time tF 100 ns CL = 1nF 5
Maximum On Time tON_MAX 15 µs 5
Maximum Frequency fMAX 150 kHz 5
Primary Current Clamp Voltage VCS_CLAMP 2 V 5
Primary Over Current Voltage VCS_OCP 3 V 5
Trans-Conductance Gm 27 µA/V 5
Amplifier Source Current ISOURCE 7.2 µA 5
Overheating Temperature Regulation TREG 150 °C 5
Shutdown Temperature 180 °C 5

Materials and finish

As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).

Part Material Colour / plating Datasheet says Page
contacts tin  Terminals: Finish - Matte Tin Plated Leads, Solderable per M2003 JESD22-B102  Weight: 0.076 grams (Approximate) 14

CAD (KiCad official)

  • Symbol: AL1666AS-13
  • Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
  • 3D model: SO-8 (KiCad packages3D, STEP)
  • 3D model files: al1666as-13-etched.step / al1666as-13-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); al1666as-13.step / al1666as-13.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Diodes Incorporated datasheet (15 pp, sha256 b4199df6c0935596, retrieved 2026-10-23, tier: manufacturer)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text), consensus claude-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).

Datasheet PDF