BQ24314DSJR

Introduction to bq24314DSJR
- What it is: A Texas Instruments standalone Li‑ion/Li‑polymer battery charger with integrated power-path management, designed for single-cell packs in portable devices. The DSJR suffix denotes its specific package/temperature grade.
- Key features: USB/wall-adapter input, programmable charge current, constant-current/constant-voltage charging, battery temperature monitoring (via thermistor), safety protections (overvoltage, overcurrent/short-circuit, and thermal protection), and status indicators. Built-in system power-path lets the device run from the input while the battery is charging.
- What it does: It controls the charging cycle from preconditioning to termination, ensuring safe, reliable charging while protecting the battery and system. It also manages timing and termination to avoid overcharge.
- Typical applications: Smartphones, wearables, handheld devices, Bluetooth speakers, portable electronics requiring a compact, safe Li‑ion charger.
- Why choose it: Reduces bill of materials with integrated FETs and safety features, supports simple external resistor programming, and offers compact packaging suitable for space‑constrained designs.

8-pin VSSOP (3×3 mm) package.

- Pin count: 24 pins (QFN-24, DSJR package)
- Function: A single-cell Li‑ion/Li‑polymer battery charger with integrated switch-mode charger and PowerPath management; accepts USB/adapter input, provides programmable charge current, CC/CV termination, safety features (thermal, overvoltage, fault), and system power-path control.

The BQ24314DSJR is manufactured by Texas Instruments (TI). TI is an American multinational semiconductor company that designs and manufactures analog, digital, and mixed-signal integrated circuits and embedded processors for a wide range of electronics applications.

Application areas: USB-powered single-cell Li-Ion/Li-Po battery charging with integrated safety for portable electronics and wearables; suitable for cell phones, cameras, MP3 players, PDAs, handheld gaming devices, e-readers, portable medical devices, and other compact consumer devices requiring a small, standalone Li-ion charger with system-load support.

There isn’t an exact one-to-one substitute. Closest functional equivalents:
- Texas Instruments: BQ24075, BQ24072 (USB-input Li‑ion single-cell chargers)
- Microchip Technology: MCP73831, MCP73833 (standalone Li‑ion charger controllers)
Note: check exact specs (input, current, termination, power-path) for compatibility. Use TI’s cross-reference tool for precise substitutions.