BQ25672RQMR

BQ25672RQMR is Texas Instruments’ single‑cell Li‑ion battery charger with integrated power‑path management. It’s designed for portable devices that charge a Li‑ion cell from a USB or other DC input while potentially powering the system at the same time.
Key points:
- USB/power input with system-load sharing (power path)
- Programmable charging parameters (current/termination via I2C) and charging regulation
- Safety and protection: over‑voltage, over‑current, short‑circuit, thermal regulation, and battery temperature monitoring
- I2C control and monitoring interface for setup and status
- RQMR suffix denotes the package and packaging options (consult datasheet for exact details)
For exact electrical specs, pinout, and package information, refer to the TI datasheet and product page.

Here are the main features of the BQ25672RQMR:
- Fully integrated single‑cell Li‑ion/Li‑polymer charger with power-path management
- USB input support (5V) with programmable input current limit
- High‑efficiency switch‑mode charger that can power the system while charging
- Constant-current/constant-voltage charging with adjustable charging current
- 4.2V battery regulation and termination by appropriate current threshold; preconditioning for deeply discharged cells
- Battery temperature monitoring via external NTC and safety shutoffs on out‑of‑range temps
- Comprehensive protections: overcurrent/short‑circuit, overvoltage, reverse current, and thermal regulation
- Automatic recharge when battery voltage falls below a threshold
- Minimal external components in a compact package (RQMR)
- Suitable for portable devices requiring reliable USB charging with built‑in power‑path features

Pin count: 16 pins (QFN-16 package, suffix RQMR).
Function: TI bq25672RQMR is a single‑cell Li‑ion battery charger with integrated power‑path management and system regulator. It accepts USB VBUS input, charges the battery with programmable current and a fixed regulation voltage, and can power the system load from VBUS or SYS/BAT as appropriate. It includes status outputs, enable/disable control, thermistor/over‑temperature protection, and typical safety features.

- Manufacturer: Texas Instruments Incorporated (TI).
- What kind of company: TI is an American multinational semiconductor company that designs and manufactures analog and embedded processing integrated circuits, including battery management and power-management ICs.

BQ25672RQMR applications: a 1-cell Li‑ion battery charger with integrated power-path and safety features for portable devices. Suitable for USB-powered charging while powering the system.
- Wearables: smartwatches, fitness trackers
- Wireless audio: earbuds, headphones, portable speakers
- Compact cameras and action cams
- Handheld medical devices
- Portable IoT sensors and meters
- Other single-cell battery-powered consumer electronics needing efficient USB charging with power-path management

QFN-16 package (3×3 mm). The RQMR suffix denotes the tape-and-reel packaging option.