BQ25730RSNR

The bq25730RSNR is TI’s standalone Li‑ion battery charger with integrated power-path management for single‑cell systems. It charges a 1S Li‑ion/Li‑poly battery from an external input (USB or DC adapter) while powering the system load. The RSNR suffix denotes the specific TI package/reel variant.
Key features:
- Constant‑current/constant‑voltage charging with programmable charge current and termination
- Dynamic power-path management to support system power during charging
- I2C control and status reporting
- Comprehensive safety: thermal, overvoltage, overcurrent/short‑circuit protections; battery‑temperature monitoring
- High efficiency
Typical applications:
- Portable devices (phones, wearables, small tablets, USB-powered gadgets) needing an integrated 1S charger
How to use:
- Connect VIN to the input supply (often 5V), BAT to the battery, GND/PGND to ground
- Configure via I2C for desired charge current and CV voltage; monitor status via I2C
- Refer to the datasheet for exact specs, pinout, and programming details.

bq25730RSNR is a highly integrated Li‑ion battery charger with system power‑path management. Key features:
- Single‑cell Li‑ion charging with CC/CV regulation, programmable charge current, and termination (including pre‑charge for deep discharge).
- System power‑path: powers the system from the input while charging the battery; prevents back‑feeding and enables safe operation during charging.
- Input versatility: accepts DC input (typical USB/adapter sources) with programmable input current limit.
- Efficient power management: supports charging while supplying system load with high overall efficiency.
- Safety and protection: battery overvoltage/overcurrent, short‑circuit protection, battery temperature monitoring with FET control, and fault protection logic.
- Thermal management: thermal sensing and automatic protection to prevent overheating.
- Simple control and monitoring: I2C interface for configuring charging parameters and monitoring status; includes status/interrupt outputs.
- Startup and fault handling: automatic recharge, fault recovery, and watchdog features.
- Packaging: RSNR (compact, thermally efficient package) suitable for portable applications.
Note: For exact electrical specs (current, voltages, input range), refer to the TI datasheet for bq25730RSNR.

VQFN-20 package (4×4 mm), RoHS-compliant.

- Pin count: 16 pins (QFN package)
- Function: Highly integrated Li‑ion battery charger with buck‑boost power-path controller; manages USB‑C input, charges the battery, and powers the system.

Manufacturer: Texas Instruments Incorporated (TI).
TI is an American multinational semiconductor company that designs and manufactures analog and mixed-signal, as well as embedded processing, integrated circuits for a wide range of industries.

BQ25730RSNR is a single-cell Li‑ion battery charger with integrated MOSFETs and power-path control (buck-boost). Applications: portable consumer electronics (phones, tablets, wearables), IoT/sensor nodes, portable medical devices, camera/handheld industrial gear, solar-powered charging systems, and automotive/backup power subsystems.