component
L6566BTR
Public Made by Adomby adom
STMicroelectronics AC-DC Controllers And Regulators, SO-16. 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
markdownL6566BTR
STMicroelectronics · AC-DC Controllers And Regulators · SO-16
L6566BTR from STMicroelectronics, in a SO-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 | HVS | input | High-voltage start-up input withstanding up to 700 V; internal 1 mA current source charges Vcc capacitor until IC turn-on threshold (13-15 V) is reached. |
| 2 | N.C. | unconnected | Not internally connected; provision for PCB clearance to meet safety requirements. |
| 3 | GND | power_in | Ground reference for signal and gate driver current return; must use separate PCB path from pulsed currents to avoid noise coupling. |
| 4 | GD | output | Gate driver output; totem pole stage with 800 mA peak source/sink current capability for driving MOSFET and IGBT gates. |
| 5 | Vcc | power_in | Supply voltage input with operating range 10.6 to 23 V after turn-on; IC disabled below adaptive UVLO threshold which reduces at light load. |
| 6 | FMOD | output | Frequency modulation output generating symmetrical triangular waveform via internal current sources charging external capacitor; connect resistor to OSC pin for spread-spectrum EMI reduction. |
| 7 | CS | input | Current sense input to PWM comparator with 150 ns minimum blanking time; 1.5 V second threshold triggers latched shutdown for transformer saturation or secondary diode short-circuit detection. |
| 8 | DIS | input | Latched disable input; voltage exceeding 4.5 V latches IC off reducing consumption; latch clears when Vcc falls below UVLO or AC_OK pulled low. |
| 9 | COMP | input | Feedback control input for loop regulation via phototransistor emitter current; operating range 2.5 to 5 V with internal 2 V bottom clamp; voltage below 1.4 V shuts down IC. |
| 10 | VREF | power_in | Accurate 5 V ± 2% internal voltage reference output supplying few mA to external circuits; IC latches off upon reference failure or drift detection. |
| 11 | ZCD | input | Zero current detector and overvoltage protection input from auxiliary winding; negative-going edge triggers MOSFET turn-on in QR mode; voltage above 5 V activates OVP shutdown. |
| 12 | MODE/SC | input | Operating mode selection input; tie to VREF for quasi-resonant mode (oscillator sets maximum frequency) or leave open for fixed-frequency mode (70% maximum duty cycle); delivers slope compensation ramp. |
| 13 | OSC | output | Oscillator frequency setting; internal 1 V voltage source with resistor to GND defining oscillator current; sets maximum frequency in QR mode or actual frequency in FF mode. |
| 14 | SS | input | Soft-start capacitor input charging from internal current source; progressive duty-cycle ramp during startup; also delays latched shutdown upon overload protection triggering. |
| 15 | VFF | input | Line voltage feedforward input with linear range 0 to 3 V modulating pulse-by-pulse current limit setpoint inversely; voltage above 3 V stops switching. |
| 16 | AC_OK | input | Brownout protection input with 0.45 V threshold; below threshold shuts down IC and clears latched protections; above threshold re-enables operation with internal 15 µA hysteresis current. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| Package | SO-16 |
| Category | Power Management (PMIC) |
| Pins | 16 |
CAD (KiCad official)
- Symbol:
L6566BTR - Footprint:
Package_SO:SOIC-16_3.9x9.9mm_P1.27mm - 3D model: SO-16 (KiCad packages3D, STEP)
- 3D model files:
l6566btr-etched.step/l6566btr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);l6566btr.step/l6566btr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: STMicroelectronics datasheet (51 pp, sha256
f4985aaaeab61abc, retrieved 2026-10-03, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-4-5-20251001(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).