NCP3066PG

Overview

The NCP3066PG is a monolithic switching regulator designed for high-brightness LED applications, manufactured by onsemi. It operates in Buck, Boost, or Inverting topologies with an input voltage range of 3.0V to 40V. The device integrates a 1.5A switch and provides constant current regulation via a low feedback voltage of 235mV. It features a fixed switching frequency of 250kHz and supports PWM dimming through the ON/OFF pin. Packaged in an 8-pin DIP (SOIC-8 equivalent package code), it functions within a temperature range of 0°C to +70°C.

Feature Summary

• Integrates a 1.5A Darlington output switch for direct LED driving without external pass transistors.
• Offers configurable Buck, Boost, and Inverting topologies using minimal external components.
• Supports analog and digital PWM dimming for precise brightness control via the enable pin.
• Includes internal thermal shutdown and cycle-by-cycle current limiting for circuit protection.

Applications

• High-brightness LED lighting systems
• Automotive exterior lighting applications
• Portable battery-powered LED drivers

Procurement Notes

Verify the package designation carefully, as datasheets may list SOIC-8 while specific suffixes like PG indicate DIP packaging. Confirm RoHS compliance status directly from the manufacturer's latest documentation. Ensure the operating temperature range meets your specific environmental requirements before finalizing procurement.

Selection Notes

Select this component when a simple, cost-effective solution for driving HB-LEDs is required. It is suitable for designs needing wide input voltage compatibility and integrated power switching. Consider the DIP package availability if through-hole mounting is preferred over surface-mount options for prototyping or specific industrial enclosures.

Part Context

This part belongs to the NCP3066 series of switching regulators. It shares functional similarities with the NCP3065 but differs primarily in packaging and potentially minor electrical characteristics. The series is optimized for LED driver applications requiring constant current regulation with minimal external component count.

Replacement Considerations

The NCP3065 is a related part in the same family. Verify pinout compatibility and package differences before substitution. Check specific electrical parameters such as switching frequency tolerance and thermal resistance to ensure equivalent performance in the target application.