GENERAL DESCRIPTION

ACT4523 is a wide input voltage, high efficiency Active CC step-down DC/DC converter that operates in either CV (Constant Output Voltage) mode or CC (Constant Output Current) mode. ACT4523 provides up to 3A output current at 225kHz switching frequency.

FEATURES

• 40V Input Voltage Surge

• 38V Steady State Operation

• Up to 3A output current

• Output Voltage up to 12V

• Patent Pending Active CC Sensorless Constant Current Control

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

• Resistor Programmable

    − Current Limit from 1.5A to 3A

    − Patented Cable Compensation from 0Ω to 0.3Ω

• ±7.5 CC Accuracy

    − Compensation of Input /Output Voltage Change

    − Temperature Compensation

    − Independent of inductance and Inductor DCR

• 2 Feedback Voltage Accuracy

• Up to 94 Efficiency

• 225kHz 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-8EP Package

APPLICATIONS

• Car Charger/ Adaptor

• Rechargeable Portable Devices

• General-Purpose CC/CV Supply