Power Electronics / Power Management


Switching regulator improves system efficiency

14 November 2007 Power Electronics / Power Management

ON Semiconductor has introduced the NCP3065 switching regulator designed to efficiently drive high brightness LEDs. The NCP3065 is a 1,5 A monolithic switching regulator that features a very low feedback voltage of 235 mV. The feedback voltage is used to regulate the average current through the LED string in a constant current regulator configuration. The low feedback voltage also allows the use of a smaller sense resistor. The company claims that the power dissipation in the sense resistor is reduced by 80% compared to competitive devices which utilise a standard 1,25 V feedback voltage, which can result in up to 2% savings on the overall system efficiency. The device has a wide input voltage range from 3 V up to 40 V to allow operation from 12 V a.c. and 12 V d.c. supplies commonly used for lighting applications and unregulated power supplies such as lead acid batteries.



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