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LTC1759 - Smart Battery Charger

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 specific limits for improved system safety and reliability. Limits are programmable by two external resistors. Additionally, the maximum average current from the AC adapter is programmable to avoid overloading the adapter when simultaneously supplying load current and charging current. When supplying system load current, charging current is automatically reduced to prevent adapter overload.

特点 Single Chip Smart Battery Charger Controller 100% Compliant (Rev 1.0) SMBus SupportAllows for Operation with or without Host SMBus Accelerator Improves SMBus Timing Hardware Interrupt and SMBAlert ResponseEliminate 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 CurrentProgramming User-Selectable Overvoltage and Overcurrent Limits High Noise Immunity Thermistor Sensor Small 36-Lead Narrow (0.209 典型应用

应用 Portable Computers Portable Instruments Docking Stations 封装信息