BQ25730RSNR

Introduction to bq25730RSNR (TI)
- A switching Li-ion battery charger with integrated power-path for single-cell battery systems in portable devices.
- Accepts USB or DC input and charges the cell using a CC/CV-like algorithm; supports adjustable charge current.
- Power-path management keeps the system powered while charging the battery, improving overall efficiency.
- Built-in protections: overvoltage, overcurrent/short-circuit, thermal protection, battery temperature monitoring, and fault reporting.
- Configurable via a digital interface (I2C) for monitoring, parameters, and status in many designs.
- RSNR denotes the TI packaging variant for this part (a leadless QFN/RSON-style package).
- Typical applications: smartphones, wearables, tablets, and other compact battery-powered devices requiring a compact, safe charger with power-path management.

Key features of BQ25730RSNR:
- Highly integrated Li‑ion battery charger with power-path management for portable devices
- USB-C input with Type‑C safety/CC logic for reliable charging from USB sources
- Supports single‑cell Li‑ion/Li‑poly batteries; programmable charging current and regulation voltage; includes preconditioning and termination
- High‑efficiency synchronous switching charger with integrated FETs
- Power-path/load‑sharing: system can be powered while the battery is charged
- I2C/SMBus control interface for configuration and monitoring
- Comprehensive safety: overvoltage, overcurrent, short‑circuit, thermal protection; watchdog and fault reporting
- Battery protection features: automatic recharge, NTC monitoring
- Status/FAULT outputs for easy host integration and diagnostics
- Compact RSNR package (RoHS) suitable for space‑limited applications
Note: For exact electrical specifications (current limits, voltages, temperature range), consult the datasheet.

- Pin count: 28 pins (28‑pin QFN, with exposed pad).
- Function: All‑in‑one Li‑ion battery charge‑management IC with power‑path control. Accepts USB/AC input, manages battery charging (current/voltage regulation, termination), provides system load power while charging, and offers safety features and I2C control.

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

BQ25730RSNR is a Li‑ion battery charger IC with integrated buck‑boost and power-path, designed for portable devices that must be charged from USB or DC sources while keeping the system powered. Common applications include:
- Smartphones, tablets, wearables
- Portable medical devices
- IoT sensors and gateways
- Industrial handheld instruments
- Drones and robotics
- Power banks and solar charging systems
- Any consumer/industrial device requiring Li‑ion charging with USB/DC input and system power-path management
Notes: supports Li‑ion/Li‑polymer chemistries and USB/DC input scenarios.

BQ25730RSNR is in a 28‑pin QFN package (4x4 mm, RoHS lead-free).