BQ25040DQCR

Texas Instruments · Battery Management · WSON-10-EP(2x3)

BQ25040DQCR from Texas Instruments, in a WSON-10-EP(2x3). 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	IN	power_in	Input power supply (4.35V to 26V) with overvoltage protection at 6.9V; bypass to VSS with at least 1µF ceramic capacitor.
2	ISET	input	Current programming input; connect resistor from 475Ω to 5.36kΩ to VSS to program fast-charge current from 100mA to 1.1A.
3	VSS	power_in	Ground terminal; connect to thermal pad and ground plane of the circuit.
4	LDO	power_out	LDO output regulated to 4.9V with up to 50mA output current; bypass to VSS with at least 1µF ceramic capacitor.
5	IFULL	input	Charge done current programming input; connect resistor to VSS to program charge done threshold from 5% to 50% of fast-charge current.
6	EN/SET	input	One-wire interface input with internal ~260kΩ pulldown to VSS for device enable/disable and mode selection.
7	VSS	power_in	Ground terminal; connect to thermal pad and ground plane of the circuit.
8	CHG	tri_state	Charge done indicator open-drain output; pulled low during charging, high impedance when battery fully charged or during fault conditions.
9	PG	tri_state	Power good open-drain output; pulled low when input power above battery voltage by 80mV and below 6.9V overvoltage protection threshold.
10	BAT	power_out	Battery connection output; supplies up to 2.3A in production test mode at 4.2V or up to 1.1A charge current in normal mode; bypass to VSS with at least 1µF ceramic capacitor.
11	PAD	passive	Exposed pad (from the footprint; not named in the datasheet pin table).

Key specifications

Parameter	Value
Manufacturer	Texas Instruments
Package	WSON-10-EP(2x3)
Category	Power Management (PMIC)
Pins	11

CAD (KiCad official)

Symbol: BQ25040DQCR
Footprint: Package_SON:WSON-10-1EP_2x3mm_P0.5mm_EP0.84x2.4mm
3D model: WSON-10-EP(2x3) (KiCad packages3D, STEP)
3D model files: bq25040dqcr-etched.step / bq25040dqcr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); bq25040dqcr.step / bq25040dqcr.glb are the bare package body.

Provenance

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

Datasheet: Texas Instruments datasheet (29 pp, sha256 186049e80d00120e, retrieved 2026-10-01, tier: lcsc)
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

# BQ25040DQCR

**Texas Instruments** · Battery Management · WSON-10-EP(2x3)

BQ25040DQCR from Texas Instruments, in a WSON-10-EP(2x3). 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 | IN | power_in | Input power supply (4.35V to 26V) with overvoltage protection at 6.9V; bypass to VSS with at least 1µF ceramic capacitor. |
| 2 | ISET | input | Current programming input; connect resistor from 475Ω to 5.36kΩ to VSS to program fast-charge current from 100mA to 1.1A. |
| 3 | VSS | power_in | Ground terminal; connect to thermal pad and ground plane of the circuit. |
| 4 | LDO | power_out | LDO output regulated to 4.9V with up to 50mA output current; bypass to VSS with at least 1µF ceramic capacitor. |
| 5 | IFULL | input | Charge done current programming input; connect resistor to VSS to program charge done threshold from 5% to 50% of fast-charge current. |
| 6 | EN/SET | input | One-wire interface input with internal ~260kΩ pulldown to VSS for device enable/disable and mode selection. |
| 7 | VSS | power_in | Ground terminal; connect to thermal pad and ground plane of the circuit. |
| 8 | CHG | tri_state | Charge done indicator open-drain output; pulled low during charging, high impedance when battery fully charged or during fault conditions. |
| 9 | PG | tri_state | Power good open-drain output; pulled low when input power above battery voltage by 80mV and below 6.9V overvoltage protection threshold. |
| 10 | BAT | power_out | Battery connection output; supplies up to 2.3A in production test mode at 4.2V or up to 1.1A charge current in normal mode; bypass to VSS with at least 1µF ceramic capacitor. |
| 11 | PAD | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | WSON-10-EP(2x3) |
| Category | Power Management (PMIC) |
| Pins | 11 |

## CAD (KiCad official)

- Symbol: `BQ25040DQCR`
- Footprint: `Package_SON:WSON-10-1EP_2x3mm_P0.5mm_EP0.84x2.4mm`
- 3D model: WSON-10-EP(2x3) (KiCad packages3D, STEP)
- 3D model files: `bq25040dqcr-etched.step` / `bq25040dqcr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bq25040dqcr.step` / `bq25040dqcr.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/bq25040) (29 pp, sha256 `186049e80d00120e`, retrieved 2026-10-01, tier: lcsc)
- **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/bq25040dqcr-datasheet.pdf)