BQ25040DQCR

The bq25040DQCR is a TI single‑cell Li‑ion battery charger with integrated power-path management. It is designed to charge from a 5 V USB or regulated input while simultaneously supplying the system load.
Key points:
- Integrated switch‑mode charger with 4.2 V termination for a single Li‑ion cell.
- Programmable charge current via ISET (typically up to ~1 A, depending on configuration).
- Power-path architecture: system can run from input while battery charges; protects battery and maintains system power.
- Safety and protection: overcurrent, short‑circuit, overvoltage, thermal monitoring.
- Battery temperature monitoring and status signals (e.g., CHG, STAT).
- Package: DQCR denotes a specific TI RoHS-compliant QFN‑style package and revision.
Notable applications: portable devices, USB-powered gadgets, accessories needing simple, integrated charging with power-path.
Typical usage: connect IN to 5 V, BAT to the Li‑ion cell, SYS to the system load; select charge current with ISET; monitor status pins for charge state and fault conditions.

BQ25040DQCR is in a QFN package: QFN-16 (Quad Flat No-Lead), 4×4 mm body with an exposed pad; RoHS-compliant.

- Pin count: 16 pins (QFN 4×4 mm with an exposed pad).
- Function: A single‑chip Li‑ion battery charge management IC with power-path control (battery charging and system load management from USB/adapter), including charge regulation and safety features for a single-cell Li‑ion battery.

The BQ25040DQCR is manufactured by Texas Instruments Incorporated (TI). TI is an American multinational technology company that designs and manufactures semiconductors and related components, specializing in analog and embedded processing ICs.

BQ25040DQCR is a stand-alone Li‑ion battery charger with integrated power-path and system load sharing. Applications include portable, battery-powered devices that charge from USB or AC adapters and require safe, efficient charging with temperature monitoring and automatic recharge: e.g., mobile handhelds, wearables, portable medical instruments, IoT sensors/gadgets, USB peripherals, cordless accessories, and other single-cell Li‑ion powered products.