BQ34110PW

BQ34110PW is a Texas Instruments gas gauge IC for single-cell Li‑ion/Li‑polymer packs. It performs coulomb counting to track remaining capacity and estimate state of charge (SOC), while monitoring pack voltage and temperature. The device stores configuration and calibration data in non-volatile memory and provides status/interrupt outputs for protection and alerts. It communicates with a host microcontroller over an I2C/SMBus‑style interface and requires an external current-sense resistor to measure pack current. The PW suffix denotes a specific package type for surface-mount applications. Used in portable devices, it helps optimize runtime, provide SOC/SoC information, and protect against overcurrent/undervoltage conditions.

Here are the key features of bq34110PW:
- Impedance Track-based fuel gauge for single-cell Li‑ion/Li‑poly packs
- I2C/SMBus digital interface for pack communication
- Coulomb counting with impedance-tracking correction for accurate SOC across aging and temperature
- Real-time monitoring: voltage, current, temperature, and cell impedance
- Estimates: state of charge (SOC), state of health (SOH), remaining capacity, and time remaining
- Low quiescent current with sleep/wake operation for long standby life
- Programmable alerts/interrupts and configurable registers
- 8-pin PW package; wide operating temperature range (−40°C to +85°C); no external MCU required
Note: Suitable for 1S Li‑ion/Li‑poly battery packs; designed to improve accuracy over temperature and aging.

Pin count: 20 pins in the PW package (WSON-20).
Function: TI BQ34110PW is an impedance-track battery fuel gauge with integrated protection. It monitors battery voltage, current, and temperature, provides fuel-gauge data, and communicates via I2C (SCL/SDA) with optional alert/GPIO signals for system control.

- Manufacturer: Texas Instruments (TI).
- Company type: American multinational technology company that designs and manufactures semiconductors and integrated circuits (especially analog, mixed-signal, and power-management devices).

BQ34110PW is a fuel gauge IC with Impedance Track for 1–4 series Li‑ion/Li‑poly packs. It provides SOC/SOH estimation and coulomb counting in compact packs. Typical application areas:
- Consumer portable devices (smartphones, tablets, wearables)
- IoT sensors and gateways
- USB power banks and mobile accessories
- Cordless tools and portable medical devices
- Drones/robots and other 1–4S battery-powered systems
Any application requiring accurate gas gauging for 1–4S Li‑ion packs.

BQ34110PW comes in an 8-pin WSON (3x3 mm) package with an exposed pad.