Active-Semi ACT4303
ACT4303 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. The ACT4303 achieves higher efficiency than traditional constant current switching regulators by eliminating its associated power loss. ACT4303 provides up to 3A output current at 225kHz switching frequency.| Part No. | ACT4303 |
|---|---|
| Datasheet | ACT4303 Download |
| Manufacturer |  Active-Semi |
| Description | 30V/3A Sensorless CC/CV Step-Down DC/DC Converter |
| Buy | Stock & Price |
FEATURES
● 32V Input Voltage Surge● 30V Steady State Input Voltage
● 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
● ±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
● USB Chargers● LCD TV and Monitors
● Digital Video Recorders
● Set-Top Box
● Battery Chargers
● General-Purpose CC/CV Power Supplies
GENERAL DESCRIPTION
Active CC is a patent-pending control scheme to achieve highest accuracy sensorless constant current control.
