FHDW01A from XIN FEI HONG, 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	DOUT	output	Discharge control output. Connects to the gate of the external discharge-control N-MOSFET Q2. High (=VDD) in normal state to turn Q2 on; pulled to VSS to disable discharge on overdischarge/overcurrent/short-circuit protection.
2	VM	input	Charge/discharge current sense input. Connects through a current-limit resistor (typ. 1kΩ, R2) to the source of the external charge-control N-MOSFET Q1, sensing the voltage drop across Q1+Q2 to detect discharge overcurrent, short-circuit and charger presence (VCHG typ. -0.5V, VEDI typ. 0.150V, VSHORT typ. 1.260V vs VSS).
3	COUT	output	Charge control output. Connects to the gate of the external charge-control N-MOSFET Q1. High (=VDD) in normal state to turn Q1 on; pulled to VM to disable charging on overcharge protection.
4	NC	unconnected	No connect. Leave floating (悬空).
5	VDD	power_in	Positive supply / battery-sense input. Connects to the battery positive terminal through R1 (typ. 100Ω) and should be decoupled with a 0.1µF ceramic capacitor to VSS. Operating range 1.5V-10V; absolute max -0.3V to +10V.
6	VSS	power_in	Ground / negative supply. Connects to the battery negative terminal. All threshold voltages in the datasheet are referenced to VSS.

Key specifications

Parameter	Value
Manufacturer	XIN FEI HONG
Package	SOT-23-6
Category	PMIC
Pins	6

CAD (KiCad official)

Symbol: FHDW01A
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
`fhdw01a.step`	97 KB	You want the bare part, or you mark your own boards.
`fhdw01a-etched.step`	1.2 MB	You want the part with `FHDW01A` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 317 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: XIN FEI HONG datasheet (9 pp, sha256 d7b1e642d37634b0, 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