Description
The RT9451 integrates a high efficiency USB friendly switch mode charger with On-The-Go (OTG) support for single cell Li-ion and Li-polymer batteries, D+D
detection, and a 50mA LDO regulator into a single chip.
Features
- a synchronous 375kHz PWM controller with integrated power MOSFETs, input current sensing and regulation, Minimum Input Voltage Regulation (MIVR), high accuracy charge current and voltage regulation, and charge termination. It charges the battery in three phases : low current pre-charge, constant current fast charge, and constant voltage trickle charge. The input current is automatically limited to the value set by the host. The charger can be configured to terminate charge based on user-selectab.
RT9451-RichtekTechnology.pdf
