The ISL6251 and ISL6251A are highly integrated battery charger controllers for Li-Ion/Li-Ion polymer batteries and NiMH batteries. They feature a synchronous buck topology and use a MOSFET for power selection, resulting in high efficiency. The output voltage and charging current are programmable to optimize battery capacity.
The ISL6251 and ISL6251A provide a low‑cost, high‑efficiency solution for charging Li‑ion/Li‑polymer and NiMH batteries. They use a synchronous buck topology with a MOSFET instead of a diode, offering programmable charge voltage, current limits, and adapter‑current monitoring.
Key features include 0.5 % charge‑voltage accuracy, 3 % accurate input‑current limit, thermal shutdown, and support for 2‑4 cell battery packs. The device is supplied in QFN and QSOP packages and complies with RoHS standards.
| Input Voltage Range (DCIN) | 7 V to 25 V |
|---|---|
| Charge Voltage Accuracy | ±0.5 % (‑10 °C to 100 °C) |
| Input Current Limit Accuracy | ±3 % |
| Battery Leakage Current | <10 yA |
| Thermal Shutdown Temperature | 150 °C |
| PWM Frequency | 245 kHz to 355 kHz |
The device operates with a DC input voltage from 7 V to 25 V.
It offers ±0.5 % charge‑voltage accuracy over a temperature range of –10 °C to 100 °C.
Thermal shutdown triggers at 150 °C.
The internal PWM runs at 245 kHz to 355 kHz.