FEATURES
• 40V Input Voltage Surge
• Up to 1.5A Constant Output Current
• Output Voltage up to 12V
• Patent Pending Active CC 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 0Ω to 0.5Ω
• ±7.5% CC Accuracy
Compensation of Input/ Output Voltage Change
Temperature Compensation
Independent of Inductance and Inductor DCR
• 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
ACT4515
Wide Input Sensorless CC/CV
Step-Down DC/DC Converter
APPLICATIONS
• Car Charger
• Rechargeable Portable Devices
• General-Purpose CC/CV Supply
GENERAL DESCRIPTION
ACT4515 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. ACT4515 provides up to 1.5A
output current at 210kHz switching frequency.
Active CC is a patent-pending control scheme to
achieve highest accuracy sensorless constant current
control. Active CC eliminates the expensive, high
accuracy current sense resistor, making it ideal for
battery charging applications and high-brightness LED
drive for architectural lighting. The ACT4515 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.
Data Sheet Rev. 7.0, January 19, 2020 | Subject to change without notice
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