LTC1759

LTC1759 Smart Battery Charger FEATURES s s DESCRIPTIO s s s s s s s s s s s U APPLICATIO S s s s Single Chip Smart Battery Charger Controller 100% Compliant (Rev 1.0) SMBus Support Allows for Operation with or without Host SMBus Accelerator Improves SMBus Timing Hardware Interrupt and SMBAlert Response Eliminate Interrupt Polling High Efficiency Synchronous Buck Charger 0.5V Dropout Voltage; Maximum Duty Cycle > 99.5% AC Adapter Current Limit Maximizes Charge Rate* 1% Voltage Accuracy; 5% Current Accuracy Up to 8A Charging Current Capability Dual 10-Bit DACs for Charger Voltage and Current Programming User-Selectable Overvoltage and Overcurrent Limits High Noise Immunity Thermistor Sensor Small 36-Lead Narrow (0.209") SSOP Package The LTC®1759 Smart Battery Charger is a single chip charging solution that dramatically simplifies construction of an SBS compliant system. The LTC1759 implements a Level 2 charger function whereby the charger can be programmed by the battery or by the host. A thermistor on the battery being charged is monitored for temperature, connectivity and battery type information. The SMBus interface remains alive when the AC power adapter is removed and responds to all SMBus activity directed to it, including thermistor status (via the ChargerStatus command). The charger also provides an interrupt to the host whenever a status change is detected (e.g., battery removal, AC adapter connection). Charging current and voltage are restricted to chemistry sp...