JY2126AX from Shenzhen JingYang, 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	VCC	power_in	Supply voltage input. Recommended operating voltage ≤30 V (typ), absolute max 45 V. Startup current ~12 µA at VCC=2 V; operating current ~26 µA at VCC=2.2 V; clamp current 600 µA at VCC=10 V. Place decoupling to GND close to the pin.
2	GND	power_in	Chip ground. Also the source return for the internal D1/D2 power switches.
3	NC	unconnected	No connection (悬空脚). Leave floating.
4	D1	output	First internal switch drain (第一开关驱动). Open-drain output to the first LED string. Rdson typ 2.2 Ω (max 3 Ω) at 300 mA sink; recommended stand-off voltage 40 V; minimum peak current 60 mA. Absolute max D1/D2 voltage 40 V (limit -0.3 to +40 V).
5	NC	unconnected	No connection (悬空脚). Leave floating.
6	D2	output	Second internal switch drain (第二开关驱动). Open-drain output to the second LED string. Same electrical envelope as D1: Rdson typ 2.2 Ω at 300 mA, recommended stand-off 40 V, peak current ≥60 mA.

Key specifications

Parameter	Value
Manufacturer	Shenzhen JingYang
Package	SOT-23-6
Category	LED-drv
Pins	6

Ordering variants

Same part, different packaging or reel option.

JY2126AAX
JY2126ABX
JY2126AUX

CAD (KiCad official)

Symbol: JY2126AX
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: Shenzhen JingYang datasheet (8 pp, sha256 21a7249e35985af0, 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