HY2212-BB3A from HYCON Tech, 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	NC	unconnected	No internal connection. Leave floating or tie to VSS on the PCB; do not use as a routing via.
2	VDD	power_in	Positive supply / cell-voltage sense input. Operating range VDSOP1 = 1.5 V to 8 V (abs-max VSS-0.3 to VSS+10 V). Connect through a 100 Ω series resistor (R1) and 0.1 µF bypass capacitor (C1) to the monitored LiFePO4 cell's positive terminal. Typical IDD = 2.5 µA at VDD = 3.2 V.
3	VSS	power_in	Negative supply / ground reference. Connect to the monitored cell's negative terminal; all voltages in the datasheet are referenced to VSS.
4	NC	unconnected	No internal connection. Leave floating or tie to VSS.
5	NC	unconnected	No internal connection. Leave floating or tie to VSS.
6	OUT	output	Balance-control output driving the gate of the external balancing MOSFET. On -BB3A (feature-code A, N-MOSFET drive) OUT goes L→H (VOH ≥ VDD-0.1 V) when the cell voltage exceeds VCU = 3.600 ±0.025 V for the internal ~250 ms delay, turning on the N-MOSFET to bleed current through RB. Abs-max VOUT = VSS-0.3 to VDD+0.3 V; VOL ≤ 0.5 V.

Key specifications

Parameter	Value
Manufacturer	HYCON Tech
Package	SOT-23-6
Category	PMIC
Pins	6

Ordering variants

Same part, different packaging or reel option.

HY2212-BB3A

CAD (KiCad official)

Symbol: HY2212-BB3A
Footprint: Package_TO_SOT_SMD:SOT-23-6
3D model: SOT-23-6 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`hy2212-bb3a.step`	97 KB	You want the bare part, or you mark your own boards.
`hy2212-bb3a-etched.step`	2.1 MB	You want the part with `HY2212-BB3A` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 512 faces against 117 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.

Provenance

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

Datasheet: HYCON Tech datasheet (14 pp, sha256 b58c02aa982e12b3, 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