NCP3065D3SLDGEVB(2): 350mA @ 7 ~ 23V out, 8 ~ 25V in


* The eval board must be modified for 350mA output. The Transformer/Dual inductor and sense resistor(s).

This circuit is intended for driving high power LEDs, such as the Cree XLAMP™ series, Lumileds Luxeon™ Rebel and K2 and OSRAM, Golden and Platinum Dragon™ as well as the OSTAR™. It is designed for such wide input nominal 12 Vdc applications as automotive and low voltage lighting (12 Vdc/12 Vac). An optional dimming PWM input is included.

The circuit is based on NCP3065 operation at 250 kHz in a non-isolated configuration. The primary advantages of this circuit are in the wide input voltage range, wide output voltage range, and in its high efficiency.

A pulse feedback resistor (R8) is used to vary the slope of the oscillator ramp, achieving duty cycle control and steady switching frequency over a wide input voltage range.


Manufacturer ON Semiconductor
Category Lighting
Sub-Category LED Drivers - DC In
Eval Board Part Number NCP3065D3SLDGEVBOS-ND
Eval Board Supplier ON Semiconductor
Eval Board Board not Stocked
Voltage In 8 ~ 25 V
Topology Step Up/Down
Current Out 350 mA
Voltage Out (Max) 23 V
Outputs and Type 1 Non-Isolated
Efficiency @ Conditions >80%, 8 ~ 15V in, 22Vf @ 350 mA
>75%, 8 ~ 20V in, 14Vf @ 350 mA
Features Dimming Control
Open Circuit Protection
Short Circuit Protection
Switching Frequency 250 kHz
Component Count + Extras 26 + 8
Design Author ON Semiconductor
Application / Target Market Automotive
LED Signage
Lighting: LED Home Lighting
Main I.C. Base Part NCP3065
Date Created By Author
Date Added To Library 2011-09

Eval Board


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