NCV3066

DATA SHEET www.onsemi.com Constant Current Step-Up/ Step-Down/Inverting Switching Regulator for HB-LEDs with Enable 1.5 A NCP3066, NCV3066 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. The NCP3066 switching regulator can be configured in Step−Down (Buck), Step−Up (Boost) and Voltage−Inverting topologies with a minimum number of external components. The ON/OFF pin provides PWM dimming capability or a low power shutdown mode. 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 1 DFN8 MN SUFFIX CASE 488AF 8 1 SOIC−8 ...