Up to 1.5 A Constant Current Switching Regulator for LEDs with ON/OFF Function

The NCP3066 is a monolithic switching regulator designed to deliver constant current for powering high brightness LEDs. The device has a very low feedback voltage of 235 mV (nominal) which is
used to regulate the average current of the LED string. In addition, the NCP3066 has a wide input voltage up to 40 V to allow it to operate from a 12 Vac or a 12−36 Vdc supply, commonly used for lighting applications as well as unregulated supplies such as rechargeable batteries.

FEATUREs
•Integrated 1.5 A Switch
•Input Voltage Range from 3.0 V to 40 V
•Logic Level Shutdown Capability
•Low Feedback Voltage of 235 mV
•Cycle−by−Cycle Current Limit
•No Control Loop Compensation Required
•Frequency of Operation Adjustable up to 250 kHz
•Analog and Digital PWM Dimming Capability
•Internal Thermal Shutdown with Hysteresis
•NCV Prefix for Automotive and Other Applications Requiring Site and Control Changes
•These are Pb−Free Devices

Applications
•Automotive and Marine Lighting
•Constant Current Source, High Brightness LED Driver
•Low Voltage and Landscape Lighting