The LTC1980EGN#PBF is a Battery Charger and DC/DC Converter converts the battery voltage to a regulated output or simultaneously charging the battery while powering a system load from an unregulated AC wall adapter. Combining these features into a single IC produces a smaller area and lower cost solution compared to presently available multi-IC solutions. The LTC1980 shares the discrete components for both the battery charger and the DC/DC converter thus minimizing size and cost relative to dual controller solutions. Both the battery charger and DC/DC converter use a current mode fly back topology for high efficiency and excellent transient response. Optional Burst Mode operation and power-down mode allow power density, efficiency and output ripple to be tailored to the application. It provides a complete Li-ion battery charger with charge termination timer, preset Li-ion battery voltages, overvoltage and under voltage protection and user programmable constant-current charging.
- Single controller IC includes battery charger plus DC/DC converter
- Wall adapter voltage may be above or below battery voltage
- LDO controller allows simultaneous charging and regulating from wall adapter input
- Simple NiMH and NiCd battery charger
- High efficiency current mode 300kHz PWM
- Reduced component architecture
- Undervoltage protection and soft-start ensures start-up with current limited wall adapter
电源管理, 计算机和计算机周边, 便携式器材, 消费电子产品
(EN)
