The TP4059 is a linear single‑cell Li‑ion battery charger with programmable 600 mA current, reverse‑polarity protection and USB power support.
The TP4059 is a complete single‑cell Li‑ion battery charger that provides constant‑current/constant‑voltage operation, programmable charging current up to 600 mA, and built‑in reverse‑polarity protection. It can be powered from a USB port or an external adapter up to 9 V and includes thermal regulation to limit current when the chip temperature rises.
Typical applications include charging seats, power banks, cellular phones, PDAs, MP3 players and Bluetooth devices. The device is supplied in a 6‑pin SOT‑23‑6 package and requires only a few external components (PROG resistor, input and battery bypass capacitors). Pin functions such as CHRG, STDBY and PROG provide status indication and allow manual shutdown or re‑start of the charging cycle. This manual is written in Chinese.
| Maximum charging current | 600 mA (programmable) |
|---|---|
| Standby supply current | 145 µA |
| Operating temperature range | -40 °C – 85 °C |
| Package | 6‑pin SOT‑23‑6 |
| Charge termination method | C/10 termination |
The TP4059 can deliver up to 600 mA of charging current, which can be programmed via the PROG pin resistor.
It includes internal reverse‑polarity protection using a PMOSFET, so no external diode or detection resistor is required.