Overview
Description
The ISL6251EVAL1Z QSOP evaluation board is used to demonstrate the performance of the ISL6251 low cost multi-chemistry battery charger controller.
The ISL6251 is a highly integrated battery charger controller for Li-ion, Li-ion polymer and NiMH batteries. High efficiency is achieved by a synchronous buck topology and the use of a MOSFET, instead of a diode, for selecting power from the adapter or battery. The low-side MOSFET emulates a diode at light loads to improve the light load efficiency and prevent system bus boosting.
Features
- ±0.5% charge voltage accuracy (-10 °C to +100 °C)
- ±3% accurate input current limit
- ±3% accurate battery charge current limit
- ±25% accurate battery trickle charge current limit (ISL6251A)
- Programmable charge current limit, adapter current limit and charge voltage
- Fixed 300kHz PWM synchronous buck controller with diode emulation at light load
- Output for current drawn from AC adapter
- AC adapter present indicator
- Fast input current limit response
- Input voltage range 7V to 25V
- Support 2, 3 and 4-cell battery packs
- Up to 17.64V battery voltage set point
- Thermal shutdown
- Support pulse charging
- Less than 10µA battery leakage current
- Charge any battery chemistry: Li-ion, NiCd, NiMH, etc.
- Pb-free plus anneal available (RoHS compliant)
Applications
Design & Development
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