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