GENERAL DESCRIPTION

ACT4501 is a dedicated cost-effective DC-DC converter for 5V/1A car charger applications with a wide input voltage and high efficiency. The converter operates in either CV (Constant Output Voltage) mode or CC (Constant Output Current) mode. ACT4501 provides up to 1.25A output current at 125kHz switching frequency.

FEATURES

• 10V-30V Input Voltage

• 40V Transparent Input Voltage Surge

• Up to 1.25A Constant Output Current

• Output Voltage up to 12V

• Good EMC Performance on Single Layer PCB

• Patent Pending ActiveCC Constant Current Control

    − Integrated Current Control Improves Efficiency, Lowers Cost, and Reduces Component Count

• Resistor Programmable Outputs

    − Current Limit from 500mA to 1250mA Patented cable compensation from DC Cable Compensation from 0Ω to 0.5Ω

• 2 Feedback Voltage Accuracy

• Up to 90 Efficiency

• 125kHz Switching Frequency Eases EMI Design

• Advanced Feature Set

    − Integrated Soft Start

    − Thermal Shutdown

    − Secondary Cycle-by-Cycle Current Limit

    − Protection Against Shorted ISET Pin

• SOP-8 Package

APPLICATIONS

• Car Charger

• Rechargeable Portable Devices

• General-Purpose CC/CV Power Supply