CN5612 from ShangHai Consonance Elec, in a TO-252-5. 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	NC	unconnected	No connect. Not internally bonded; leave floating or tie to a non-signal net.
2	VDD	power_in	Positive supply input and internal circuit power. Operating range 2.7V to 6V; absolute maximum 6.5V.
3	GND	power_in	Power ground return. The exposed backside tab of the TO-252 should be soldered to the PCB ground copper for maximum thermal performance.
4	LED	output	LED cathode connection (open-drain current sink). Sinks the regulated constant current (up to 1.2A) programmed by RISET; LED anode connects to VIN. Must be kept below 6V under all conditions.
5	ISET	input	Constant LED current program pin. Connect a resistor RISET between ISET and VDD; ILED = 910V / RISET (A, Ω). Pulling ISET to VDD (0V across RISET) fully turns off the LED current.

Key specifications

Parameter	Value
Manufacturer	ShangHai Consonance Elec
Package	TO-252-5
Category	LED-drv
Pins	5

CAD (KiCad official)

Symbol: CN5612
Footprint: Package_TO_SOT_SMD:TO-252-5_TabPin6
3D model: TO-252-5 (KiCad packages3D, STEP)

Provenance

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

Datasheet: ShangHai Consonance Elec datasheet (8 pp, sha256 0ec5b993d8b8575c, retrieved 2026-08-17, tier: lcsc)
Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
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