BQ24314DSJR

The bq24314DSJR is TI’s stand-alone Li‑ion/Li‑polymer battery charge management IC for single-cell packs. It provides a complete, compact charging solution from a 5V input (USB or adapter) and charges the cell to 4.2V with CC/CV regulation.
Key points:
- Programmable charge current via external components; supports preconditioning, constant-current, constant-voltage charging, and termination.
- Safety features: thermal protection, overcurrent/short-circuit protection, overvoltage protection, reverse-current protection, and thermal shutdown.
- Power-path behavior: dynamic power path to power the system from the input while charging the battery.
- Battery-temp monitoring via thermistor and automatic recharge when voltage drops below a threshold.
- Suitable for portable devices such as smartphones, wearables, and other single-cell battery-powered products.
Package suffix DSJR denotes the specific TI package variant. For full electrical specs, application notes, and reference designs, consult the bq24314 datasheet and TI’s design resources.

Key features of bq24314DSJR (stand-alone Li‑ion battery charger):
- Single-cell Li‑ion/polymer charger with USB input (5 V) and adapter support.
- Constant-current/constant-voltage charging with automatic termination.
- 4.2 V regulation with preconditioning for deeply discharged cells.
- Programmable charge current and programmable input current limit.
- Thermistor/battery temperature monitoring with safety throttling.
- Power-path management to power the system while charging.
- Safety protections: overcurrent/short-circuit, overvoltage, and overtemperature.
- Status outputs and enable/shutdown control (LED indicators via STAT pins; CE/SHDN).
- Small 8-pin DSJR package suitable for compact designs.
- Wide operating range suitable for typical USB/adapter supplies and consumer gear.

- Pin count: 16 pins (DSJR package)
- Function: Stand-alone Li‑ion battery charger with USB input and power-path management. It charges the battery from VBUS, provides SYS for system load, and supports programmable charging current (ISET), temperature monitoring (TS/NTC), enable (CE), and status outputs (STAT/FAULT).

- Manufacturer: Texas Instruments (TI).
- What kind of company: American multinational technology company that designs and manufactures semiconductors, especially analog and embedded processing ICs.

- Single-cell Li-Ion battery charging from USB or adapter input for portable consumer electronics
- USB power banks, wall/car chargers, and docking stations
- Mobile devices: cell phones, digital cameras, MP3/MP4 players, handheld gaming devices
- Wearables and wireless peripherals
- IoT sensors and portable medical or other battery-powered gadgets requiring compact, safe charging

BQ24314DSJR uses an 8-pin WSON package (2.9 × 3.0 mm) with an exposed pad.