BQ25040DQCR

BQ25040DQCR is TI’s highly integrated Li‑ion battery charger with power‑path management for single‑cell devices. It can charge a single Li‑ion/Li‑polymer cell from USB or other DC sources while simultaneously powering the system through a SYS output, reducing heat in the battery and enabling operation with or without input. It provides constant‑current/constant‑voltage (CC/CV) charging with programmable current, automatic recharge, and built‑in fault protections. Key protections include overvoltage, overcurrent/short‑circuit, thermal regulation, and battery‑temperature monitoring. The power‑path architecture optimizes energy use from non‑ideal inputs (such as solar) and prioritizes system power. The device is packaged in TI’s DQCR package. Typical applications: wearables, portable sensors, handheld devices, and solar/remote energy harvesting products.

BQ25040DQCR is TI’s single‑cell Li‑ion charger with power-path. Do you want cross-references within TI’s BQ2504x family or cross‑vendor equivalents? Please specify required features (input source USB/DC, max charge current, power-path, safety/thermals, package) and I’ll provide exact alternative part numbers.

Here are concise features of the bq25040DQCR:
- Single-cell Li-Ion/Li-Po charger with integrated 5-V input path and system power-path management.
- Constant-current / constant-voltage charging with regulated end-voltage at 4.2 V; automatic preconditioning.
- External resistor-programmable charge current (I_CHG).
- Automatic recharge and end-of-charge detection.
- Battery temperature monitoring via NTC input with thermal regulation.
- Safety protections: input/output overvoltage, battery overcurrent/short-circuit, reverse-current protection, thermal shutdown.
- Power-path operation: system can be powered from input while charging battery; prevents battery from discharging into the source.
- Minimal external components; compact package (DQCR).
- Status outputs (CHG/STAT) with fault indication.
- Suitable for portable/USB-powered applications.

- Pin count: 28-pin QFN (DQCR package).
- Function: Stand-alone Li-Ion battery charger with integrated power-path management. It accepts USB/adaptor input and provides CC/CV charging, precharge/termination, and system-load power-path (charging the battery while powering the system).

- Manufacturer: Texas Instruments (TI).
- What kind of company: TI is a global semiconductor company that designs, manufactures, and sells analog and embedded processing integrated circuits, serving a wide range of electronics and industrial applications. It is an American multinational corporation headquartered in Texas.

Application areas of BQ25040DQCR:
- 1-cell Li‑ion/Li‑polymer battery charging with integrated power-path and system-load sharing
- USB or AC adapter powered portable electronics
- Mobile phones, cameras, MP3 players, handheld gaming devices, GPS units
- Portable medical devices and wearables
- USB charging docks, charging accessories, and power banks

BQ25040DQCR uses a 16-pin DQFN (3x3 mm) package, RoHS-compliant/lead-free.