# BQ29705DSER

**Texas Instruments** · Battery Management · WSON-6(1.5x1.5)

BQ29705DSER from Texas Instruments, in a WSON-6(1.5x1.5). 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 | No Connection |
| 2 | COUT | output | Charge FET gate drive output driven from BAT supply, transitions high to low when fault detected |
| 3 | DOUT | output | Discharge FET gate drive output driven from BAT supply, transitions high to low when fault detected |
| 4 | VSS | power_in | Ground reference pin for cell negative, input to voltage measurements and overcurrent protection circuits |
| 5 | BAT | power_in | Supply input pin connected to battery pack positive terminal, recommended operating voltage range -0.3 to 8V |
| 6 | V- | power_in | Voltage sense node for measuring fault detection conditions (overcurrent charging/discharging), forms differential measurement with VSS for Vds or external sense resistor sensing |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | WSON-6(1.5x1.5) |
| Category | Power Management (PMIC) |
| Pins | 6 |

## CAD (KiCad official)

- Symbol: `BQ29705DSER`
- Footprint: `Package_SON:WSON-6_1.5x1.5mm_P0.5mm`
- 3D model: WSON-6(1.5x1.5) (KiCad packages3D, STEP)
- 3D model files: `bq29705dser-etched.step` / `bq29705dser-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bq29705dser.step` / `bq29705dser.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/cn/lit/gpn/bq2970) (35 pp, sha256 `d01a24783b0ea8a1`, retrieved 2026-10-07, 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-4-5-20251001` (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/bq29705dser-datasheet.pdf)