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ACT4533B

Qorvo
Part Number ACT4533B
Manufacturer Qorvo
Description Step-Down DC/DC Converter
Published Dec 26, 2020
Detailed Description ACT4533A/B Wide Input Sensorless CC/CV Step-Down DC/DC Converter FEATURES • 40 V Input Voltage Surge • 36 V Steady Stat...
Datasheet PDF File ACT4533B PDF File

ACT4533B
ACT4533B

Overview
ACT4533A/B Wide Input Sensorless CC/CV Step-Down DC/DC Converter FEATURES • 40 V Input Voltage Surge • 36 V Steady State Operation • Up to 3.
5 A output current • Output Voltage up to 12 V • 125 kHz Switching Frequency Eases EMI Design • 91% Efficiency (VOUT = 5 V@2.
4 A at VIN = 12 V) • 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.
5 A to 4.
0 A  Patented Cable Compensation from 0 to 0.
25 Ω • ±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 Device • CV/CC regulation DC/DC converter 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.
5 A output current at 125 kHz switching frequency.
ActiveCC is a patented control scheme to achieve highaccuracy 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 ACT...


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