The MAX1908/MAX8724/MAX8765/MAX8765A highly integrated, multi-chemistry battery-charger control ICs simplify the construction of accurate and efficient chargers. These devices use analog inputs to control charge current and voltage and can be programmed by the host or hardwired. The MAX1908/MAX8724/MAX8765/MAX8765A achieves high efficiency using a buck topology with synchronous rectification.
The MAX1908/MAX8724/MAX8765/MAX8765A feature input current limiting. This feature reduces the battery charge current when the input current limit is reached to avoid overloading the AC adapter when supplying the load and the battery charger simultaneously. The MAX1908/MAX8724/MAX8765/MAX8765A provide outputs to monitor current drawn from the AC adapter (DC input source), battery-charging current, and the presence of an AC adapter. The MAX1908Â’s conditioning charge feature provides 300mA to safely charge deeply discharged lithium-ion (Li+) battery packs.
Features
- ±0.5% Output Voltage Accuracy Using Internal
- Reference (±0.4% for MAX8765A, 2-/3-Cell Only)
- ±4% Accurate Input Current Limiting
- ±5% Accurate Charge Current
- Analog Inputs Control Charge Current and
Charge Voltage - Outputs for Monitoring
- Current Drawn from AC Adapter
- Charging Current
- AC Adapter Presence
- Up to 17.6V Battery-Voltage Set Point
- Maximum 28V Input Voltage
- > 95% Efficiency
- Shutdown Control Input
- Charge Any Battery Chemistry
- Li+, NiCd, NiMH, Lead Acid, etc.
