# BQ29704DSER

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

BQ29704DSER 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 pin, electrically open. |
| 2 | COUT | output | Gate drive output for the charge FET, driven from the BAT supply and pulled to Pack- through a 5MΩ resistor for gate discharge when the FET is off. |
| 3 | DOUT | output | Gate drive output for the discharge FET, driven from the BAT supply and pulled to VSS through a 5MΩ resistor for gate discharge when the FET is off. |
| 4 | VSS | power_in | Cell negative ground reference pin, against which the cell voltage and overcurrent measurements are referenced. |
| 5 | BAT | power_in | Positive input supply connected to the battery pack positive terminal, with a 0.1µF filter capacitor to ground; recommended positive input voltage is -0.3 V to 8 V. |
| 6 | V- | power_in | Voltage sense node for charge and discharge overcurrent measurement, with a 2.2kΩ resistor to Pack-; negative input voltage range is BAT - 25 V to BAT. |

## Key specifications

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

## CAD (KiCad official)

- Symbol: `BQ29704DSER`
- Footprint: `Package_SON:WSON-6_1.5x1.5mm_P0.5mm`
- 3D model: WSON-6(1.5x1.5) (KiCad packages3D, STEP)
- 3D model files: `bq29704dser-etched.step` / `bq29704dser-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bq29704dser.step` / `bq29704dser.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/lit/ds/symlink/bq2970.pdf) (35 pp, sha256 `011527de4b541f4c`, retrieved 2026-11-06, tier: manufacturer)
- **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/bq29704dser-datasheet.pdf)