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ACT4533A Datasheet(PDF) 1 Page - Active-Semi, Inc |
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ACT4533A Datasheet(HTML) 1 Page - Active-Semi, Inc |
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1 / 18 page  Innovative Power TM - 1 - www.active-semi.com Copyright © 2013 Active-Semi, Inc. FEATURES • 40V Input Voltage Surge • 36V Steady State Operation • Up to 3.5A output current • Output Voltage up to 12V • 125kHz Switching Frequency Eases EMI Design • 91% Efficiency (Vout=5V@2.4A at Vin=12V) • Stable with Low-ESR Ceramic Capacitors to Allow Low-Profile Designs • Integrated Over Voltage Protection • Excellent EMI Performance • Patented ActiveCC Sensorless Constant Current Control Improves Efficiency and Lowers Cost. • Resistor Programmable − Current Limit from 1.5A to 4.0A − Patented Cable Compensation from 0 to 0.25Ω • ±7.5% CC Accuracy − Compensation of Input /Output Voltage Change − Temperature Compensation − Independent of inductance and Inductor DCR • 2% Feedback Voltage Accuracy • 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 CV/CC Power Supply GENERAL DESCRIPTION ACT4533A/B is a wide input voltage, high efficiency ActiveCC step-down DC/DC converter that operates in either CV (Constant Output Voltage) mode or CC (Constant Output Current) mode. ACT4533A/B provides up to 3.5A output current at 125kHz switching frequency. ActiveCC is a patented control scheme to achieve high-accuracy sensorless constant current control. ActiveCC eliminates the expensive, high accuracy current sense resistor, making it ideal for CLA applications. ACT4533A/B integrates adaptive gate drive to achieve excellent EMI performance passing EN55022 Class B EMC standard without adding additional EMI components while maintaining high conversion efficiency. Protection features include cycle-by-cycle current limit, thermal shutdown, and frequency foldback at short circuit. The devices are available in a SOP- 8EP package and require very few external devices for operation. The only difference between ACT4533A and ACT4533B is that Pin 7 provides OVP for ACT4533A and EN/OVP for ACT4533B. ACT4533A/B Wide-Input Sensorless CC/CV Step-Down DC/DC Converter Output Current (A) 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 6.0 5.0 4.0 3.0 2.0 1.0 0.0 CC/CV Curve Rev 0, 14-Aug-13 VIN = 18V VIN = 24V VIN = 12V |
Número de pieza similar - ACT4533A |
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Descripción similar - ACT4533A |
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