# DW02RA.

**Shenzhen Fuman** · Battery Management ICs · SOT23-5

DW02RA. from Shenzhen Fuman, in a SOT23-5. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | NC | unconnected | Pin 1 is an empty (no-connect) pin according to the datasheet pin description. |
| 2 | GND | power_in | Power ground, connected to the negative terminal of the supply (battery); all voltages are specified relative to GND. |
| 3 | VDD | power_in | Supply input, connected to the positive terminal of the battery; the absolute maximum rating is -0.3 to +10 V. |
| 4 | VM | input | Charge/discharge current sense input; the allowed input voltage is VDD-6 V to VDD+0.3 V. |
| 5 | VM | input | Charge/discharge current sense input (second VM pin, shared with pin 4); the allowed input voltage is VDD-6 V to VDD+0.3 V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Shenzhen Fuman |
| Package | SOT23-5 |
| Category | Power Supply Chip |
| Pins | 5 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| 供电电源 VDD | VDD | 1.5 |  | 10 | V | ■ -40℃≤TA≤85℃ | 3 |
| 过电压充电保护阈值 (由低到高) | VOC | -0.05 |  | 0.05 | V |  | 3 |
| 过电压充电保护阈值 (由低到高) 温度范围 | VOC | -0.08 |  | 0.08 | V | ■ -40℃≤TA≤85℃ | 3 |
| 过电压充电恢复阈值 (由高到低) | VOCR | -0.075 |  | 0.075 | V |  | 3 |
| 过电压充电恢复阈值 (由高到低) 温度范围 | VOCR | -0.105 |  | 0.105 | V | ■ -40℃≤TA≤85℃ | 3 |
| 过电压充电保护延迟时间 | TOC | 77 | 110 | 143 | ms | VDD=3.6V→4.5V | 3 |
| 过电压放电保护阈值 (由高到低) | VOD | -0.075 |  | 0.075 | V |  | 3 |
| 过电压放电保护阈值 (由高到低) 温度范围 | VOD | -0.105 |  | 0.105 | V | ■ -40℃≤TA≤85℃ | 3 |
| 过电压放电恢复阈值 (由低到高) | VODR | -0.075 |  | 0.075 | V |  | 3 |
| 过电压放电恢复阈值 (由低到高) 温度范围 | VODR | -0.105 |  | 0.105 | V | ■ -40℃≤TA≤85℃ | 3 |
| 过电压放电保护延迟时间 | TOD | 38.5 | 55 | 71.5 | ms | VDD=3.6V→2.3V | 3 |
| 过电流放电保护检测 | IIov | 5 | 7 | 8.5 | A |  | 3 |
| 过电流充电保护检测 | IIoc | 4 | 6.5 | 7 | A |  | 3 |
| 过电流放电保护延迟时间 | TEDI | 4.9 | 7 | 9.1 | ms |  | 3 |
| 过电流充电保护延迟时间 | TECI | 4.9 | 7 | 9.1 | ms |  | 3 |
| 短路保护延迟时间 | TSHORT | 250 | 500 |  | us | VDD=3.6V | 3 |
| 充电器检测电压 | VCHG | -0.27 | -0.5 | -0.86 | V | VDD=3.0V | 3 |
| 工作电流 | IDD |  | 1.3 | 6 | μA | VDD=3.6V | 3 |
| 静态源-源极通态电阻 (VM 至 GND) | RSS(ON) |  | 40 | 55 | mΩ | VDD=3.7V,IO=1A | 3 |
| VDD 供电电源 (绝对最大) | VDD | -0.3 |  | 10 | V |  | 2 |
| 工作温度 | TA | -40 |  | 85 | ℃ |  | 2 |
| 结温 |  |  |  | 125 | ℃ |  | 2 |
| 贮存温度 |  | -55 |  | 125 | ℃ |  | 2 |
| 功耗 | PD |  |  | 500 | mW | TA=25℃ | 2 |
| 封装热阻 | θJA |  |  | 250 | ℃/W |  | 2 |
| 焊接温度 (锡焊，10 秒) |  |  |  | 260 | ℃ | 锡焊，10 秒 | 2 |
| 防静电保护 (人体模式) | ESD |  |  | 8 | kV | 人体模式 | 2 |

## CAD (KiCad official)

- Symbol: `DW02RA.`
- Footprint: `Package_TO_SOT_SMD:SOT-23-5`
- 3D model: SOT23-5 (KiCad packages3D, STEP)
- 3D model files: `dw02ra-etched.step` / `dw02ra-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `dw02ra.step` / `dw02ra.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Shenzhen Fuman datasheet](docs/dw02ra-datasheet.pdf) (6 pp, sha256 `2f434aae4aacee21`, retrieved 2026-10-28, 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:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-5-5` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/dw02ra-datasheet.pdf)