ACT4533C
Wide Input Sensorless CC/CV Step-Down DC/DC Converter
FEATURES
• 40 V Input Voltage Surge • 36 V Steady State ...
ACT4533C
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 18 V 125 kHz Switching Frequency Eases EMI Design 91% Efficiency (VOUT = 5
[email protected] 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
ACT4533C 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. ACT4533C 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 resis...