GENERAL DESCRIPTION

ACT4533 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. ACT4533 provides up to 3A output current at 125kHz switching frequency.

FEATURES

? 40V Input Voltage Surge

? 32V Steady State Operation

? Up to 3A Output Current

? Constant Current Output with Input up to 32V

? Output Voltage up to 12V

? 125kHz Switching Frequency Eases EMI Design

? Good EMI Performance to Pass EN55022

?? Radiation Regulation without adding EMI

?? Components

? 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 0 to 0.3?

? ±7.5 CC Accuracy

?? ? Compensation of Input /Output Voltage Change

?? ? Temperature Compensation

?? ? Independent of inductance and Inductor DCR

? 2 Feedback Voltage Accuracy

? Up to 92 Efficiency

? 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