The bq2420x series are simple Li-Ion linear charge management devices targeted at low-cost and space limited charger applications. The bq2420x series offer integrated powerFET, high-accuracy voltage regulation, temperature monitoring, charge status, and charge termination, in a single monolithic device.
The bq24200‑bq24205 series are single‑chip Li‑ion and Li‑Pol charge‑management ICs designed for low‑cost, space‑limited charger applications that work with current‑limited wall supplies. They integrate a power‑FET, high‑accuracy voltage regulation, temperature monitoring, charge status output, and charge‑termination functions in an 8‑pin MSOP package.
Key features include a 500 mA integrated power‑FET, 0.5 % voltage‑regulation accuracy, battery insertion detection, pre‑charge conditioning with safety timer, sleep mode for low‑power consumption, and optional temperature monitoring via an external thermistor. Typical applications show a low‑dropout single‑cell charger schematic and charge‑profile diagrams.
| Integrated PowerFET current rating | 500 mA |
|---|---|
| Supply voltage range (VCC) | 0 V – 16.5 V |
| Operating junction temperature range | -40 °C – 125 °C |
| Voltage regulation accuracy | ±0.5 % |
| Package type | 8‑Pin Power‑Pad MSOP (DGN) |
Temperature is monitored via an external thermistor connected to the TS pin, which the IC compares against internal thresholds.
They are offered in a small 8‑pin Power‑Pad MSOP (DGN) package.
The voltage regulation accuracy is ±0.5 %.