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L6574D

Public Made by Adom

by adom

STMicroelectronics Lighting Drivers & Controllers, SOIC-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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L6574D

STMicroelectronics · Lighting Drivers & Controllers · SOIC-16

L6574D from STMicroelectronics, in a SOIC-16. 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 CPRE passive Preheat Timing Capacitor sets preheating and frequency shift time per relations tPRE = KPRE · CPRE and tSH = KFS · CPRE; charged to 3.5V during preheat timing and 5V in steady state.
2 RPRE passive Maximum Oscillation Frequency Setting resistor to ground sets fPRE value; voltage fixed at VREF = 2V.
3 CF passive Oscillator Frequency Setting capacitor along with RPRE and RIGN sets fPRE and fING frequencies; shows triangular wave in normal operation.
4 RIGN passive Minimum Oscillation Frequency Setting resistor to ground sets fIGN value; voltage fixed at VREF = 2V.
5 OPout output Output of the operational amplifier for feedback control loop implementation; can connect to RIGN pin through appropriate circuitry.
6 OPin- input Inverting input of the operational amplifier with input bias current 0.1µA and common mode input range -0.2 to 3V.
7 OPin+ input Non-inverting input of the operational amplifier with input bias current 0.1µA and common mode input range -0.2 to 3V.
8 EN1 input Enable 1 input (active high) forces device into latched shutdown state; normal operation resumed by reducing supply below UVLO threshold then increasing, or by activating EN2 input.
9 EN2 input Enable 2 input (active high) restarts the preheat and ignition sequence.
10 GND power_in Ground reference.
11 LVG output Low Side Driver Output to be connected to the low side power MOSFET gate; source current 170-250mA, sink current 300-450mA.
12 VS power_in Supply Voltage connected to supply filter capacitor; internally clamped at 15.6V typical; UVLO turn-on threshold 9.5-10.9V, turn-off threshold 7.3-8.7V.
13 N.C. unconnected Non-connected pin providing distance between high voltage and low voltage side pins.
14 OUT output High Side Driver Floating Reference to be connected close to the source of the high side power MOS or IGBT; voltage range -1 to VBOOT-VCL.
15 HVG output High Side Driver Output to be connected to the high side power MOSFET gate; source current 170-250mA, sink current 300-450mA.
16 VBOOT power_out Bootstrapped Supply Voltage; bootstrap capacitor connects between this pin and VS; integrated bootstrap circuit provides voltage to drive high side MOSFET; maximum voltage 618V.

Key specifications

Parameter Value
Manufacturer STMicroelectronics
Package SOIC-16
Category LED Drivers
Pins 16

CAD (KiCad official)

  • Symbol: L6574D
  • Footprint: Package_SO:SOIC-16_3.9x9.9mm_P1.27mm
  • 3D model: SOIC-16 (KiCad packages3D, STEP)
  • 3D model files: l6574d-etched.step / l6574d-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); l6574d.step / l6574d.glb are the bare package body.

Provenance

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

  • Datasheet: STMicroelectronics datasheet (10 pp, sha256 dbd4ac638c679f4b, retrieved 2026-10-06, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-4-5-20251001 (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