AP3766K6TR-G1 from Diodes Incorporated, in a SOT-23-6. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin	Name	Type	Function
1	OUT	output	Drive output pin. Drives the base of an external power NPN switch to control the primary side of the flyback transformer. OUT source current typ. 30mA (24-36mA), sink current min 50mA. Absolute max voltage to GND: -0.3 to 7V.
2	GND	power_in	Ground reference for the controller. Shared with pin 5.
3	VCC	power_in	Supply voltage input for the controller. Start-up threshold typ. 18.5V (16-21V); minimum operating voltage typ. 9V. Absolute max: -0.3 to 36V. Operating current typ. 200µA (max 320µA).
4	CS	input	Primary current sense input. Senses the primary switch current through an external sense resistor. Current sense threshold typ. 510mV (455-545mV); pre-current sense typ. 410mV; leading-edge blanking 750ns. Absolute max: -0.3 to 7V.
5	GND	power_in	Ground reference for the controller. Shared with pin 2.
6	FB	input	Voltage feedback input from the auxiliary winding of the flyback transformer. Feedback threshold typ. 3.83V (3.59-4.07V); input leakage typ. 2.5µA at VFB=4V. Absolute max: -40 to 10V.

Key specifications

Parameter	Value
Manufacturer	Diodes Incorporated
Package	SOT-23-6
Category	LED-drv
Pins	6

Ordering variants

AP3766K6TR-G1

CAD (KiCad official)

Symbol: AP3766K6TR-G1
Footprint: Package_TO_SOT_SMD:SOT-23-6
3D model: SOT-23-6 (KiCad packages3D, STEP)

Provenance

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

Datasheet: Diodes Incorporated datasheet (8 pp, sha256 649812092adc7420, retrieved 2026-08-17, tier: lcsc)
Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF