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ACT4514

Active-Semi
Part Number ACT4514
Manufacturer Active-Semi
Description Wide-Input Sensorless CC/CV Step-Down DC/DC Converter
Published May 7, 2016
Detailed Description Active-Semi ACT4514 Rev 2, 28-May-12 Wide-Input Sensorless CC/CV Step-Down DC/DC Converter FEATURES • Up to 40V Input...
Datasheet PDF File ACT4514 PDF File

ACT4514
ACT4514

Overview
Active-Semi ACT4514 Rev 2, 28-May-12 Wide-Input Sensorless CC/CV Step-Down DC/DC Converter FEATURES • Up to 40V Input Voltage • Up to 1.
5A Constant Output Current • Output Voltage up to 12V • Patent Pending ActiveCC Constant Current Control − Integrated Current Control Improves Efficiency, Lowers Cost, and Reduces Component Count • Resistor Programmable Outputs − Current Limit from 400mA to 1500mA − Patented cable compensation from DC Cable Compensation from 0Ω to 0.
5Ω • 2% Feedback Voltage Accuracy • Up to 93% Efficiency • 210kHz 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-8 Package APPLICATIONS • Car Charger • Rechargeable Portable Devices • General-Purpose CC/CV Power Supply GENERAL DESCRIPTION ACT4514 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.
ACT4514 provides up to 1.
5A output current at 210kHz switching frequency.
ActiveCC is a patent-pending control scheme to achieve highest accuracy sensorless constant current control.
ActiveCC eliminates the expensive, high accuracy current sense resistor, making it ideal for battery charging applications and highbrightness LED drive for architectural lighting.
The ACT4514 achieves higher efficiency than traditional constant current switching regulators by eliminating the sense resistor and its associated power loss.
Protection features include cycle-by-cycle current limit, thermal shutdown, and frequency foldback at short circuit.
The devices are available in a SOP-8 package and require very few external devices for operation.
Innovative PowerTM ACT4514-001 Output Voltage (V) CC/CV Curve vs.
Load Current 6.
0 V0UT = 5V 5.
0 4.
0 3.
0 VIN = 12V VIN = 24V 2.
0 1.
0 0.
0 0 150 300 450 600 750 900 IOUT Current (mA) -1- www.
active-semi.
com Co...


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