This document is a typical application description of the bq2420x series, which details the product's features and characteristics.
The bq24201 is a single‑chip charge management IC designed for low‑dropout charging of single‑cell Li‑ion or Li‑Pol batteries. It integrates a PowerFET, high‑accuracy voltage regulation, temperature monitoring, charge status output, and safety timers in an 8‑pin MSOP package.
Key features include a 500 mA integrated PowerFET, 0.5 % voltage regulation accuracy, battery insertion detection, pre‑charge conditioning, and a STAT pin that indicates charge‑in‑progress, charge‑complete, and fault conditions. The device operates from a current‑limited wall supply and provides optional temperature monitoring via the TS pin.
| Integrated PowerFET current rating | 500 mA |
|---|---|
| Voltage regulation accuracy | 0.5 % |
| Supply voltage range (VCC) | 0 V to 16.5 V |
| Maximum output current | 500 mA |
| Low‑voltage threshold (typical) | 2.8 V |
The device includes an integrated PowerFET rated for a maximum charge current of 500 mA.
Temperature is sensed on the TS pin using an external thermistor; the voltage on TS is compared to internal thresholds to enable or suspend charging.
STAT provides a high‑impedance output that indicates charge‑in‑progress, charge‑complete, or fault conditions, and can drive an LED or a microcontroller.
The recommended supply voltage (VCC) is 13.5 V to 16.5 V, with a minimum of 13.5 V for proper regulation.