General Description

The RT9709 is an integrated circuit (IC) optimized to protect low voltage system from abnormal high voltage input up to 28V. The IC monitors the input voltage, battery voltage and the charging current to make sure all three parameters are operated in normal range. It also monitors its own temperature and turns the MOSFET off when the chip temperature exceeds 140°C.

Features

● Fully Integrated Protection Circuit for Three Protection Variables

► User Programmable OCP Threshold

► Input OVP Less than 1us

► Battery OVP

● Up to 30V Over Voltage Protection

● High Accuracy Protection Threshold

● High Immunity of False Triggering Under Transients

● Warning Indication Output

● Enable Input

● Thermally Enhanced WDFN Package

● RoHS Compliant and Halogen Free

Applications

● Cellular Phones

● Digital Cameras

● PDAs and Smart Phones

● Portable Instruments