# DW02CA.

**Shenzhen Fuman** · Battery Management · SOT-23-5

DW02CA. from Shenzhen Fuman, in a SOT-23-5. 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 connection. Leave floating on the PCB. |
| 2 | GND | power_in | Power/reference ground. Connect to the negative terminal of the Li-ion cell. All internal detection thresholds are referenced to this pin. |
| 3 | VDD | power_in | Power supply input, connected to the positive terminal of the Li-ion cell (typ. through a ~100 Ω series resistor R1). Operating range 1.5 V to 10 V; absolute-max -0.3 V to +10 V. Used to sense cell voltage for OV-charge (VOC=4.30 V) and OV-discharge (VOD=2.44 V) thresholds. |
| 4 | VM | bidirectional | Charge/discharge current sense input, tied to pack negative terminal (P-). Voltage across the internal N-MOSFET (VM to GND) is compared against overcurrent-discharge (VEDI), overcurrent-charge (VECI), short-circuit (VSHORT ~18 A) and charger-detect (VCHG=-0.5 V) thresholds. Allowed input range VDD-6 V to VDD+0.3 V. Pin 4 is internally tied to pin 5. |
| 5 | VM | bidirectional | Charge/discharge current sense input, tied to pack negative terminal (P-). Internally connected to pin 4. Same electrical function and limits as pin 4. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Shenzhen Fuman |
| Package | SOT-23-5 |
| Category | PMIC |
| Pins | 5 |

## CAD (KiCad official)

- Symbol: `DW02CA.`
- Footprint: `Package_TO_SOT_SMD:SOT-23-5`
- 3D model: SOT-23-5 (KiCad packages3D, STEP)
- 3D model files: `dw02ca-etched.step` / `dw02ca-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `dw02ca.step` / `dw02ca.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Shenzhen Fuman datasheet](docs/dw02ca-datasheet.pdf) (6 pp, sha256 `b129889242cdd15b`, 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](docs/dw02ca-datasheet.pdf)