ON Semiconductor, the world's leading supplier of power semiconductor solutions, introduces the NCP3065 switching regulator designed to efficiently drive low-voltage lighting, landscape lighting and solar lighting, halogen bulb replacement, and high brightness commonly used in automotive and marine lighting. led. ON Semiconductor also offers several reference designs to drive the industry's latest HB-LEDs in different applications such as buck, boost and single-ended primary inductor converters.
The NCP3065 is a 1.5 amp monolithic switching regulator with an extremely low 235 millivolt feedback voltage. This feedback voltage is used to regulate the average current of the LED string in a constant current regulator configuration. This extremely low feedback voltage also allows designers to use more sensitive and cost-competitive sensing resistors. Compared to competing devices that use a standard 1.25 volt (V) feedback voltage, the NCP3065 reduces the power consumption of the sense resistor by 80%, resulting in an overall system performance improvement of 2%. The NCP3065's internal reference voltage is trimmed to 2%, providing extremely accurate and stable flow over a wide range of input voltages, LED forward voltages, and inductor tolerances.
The device's wide input voltage – from 3 V to 40 V – enables operation in 12 Vac and 12 Vdc power supplies commonly used in lighting applications and unregulated power supplies such as lead-acid batteries. The device can be configured as a controller topology with an external transistor to support a higher LED current than the 1.5 A rated switching current of the internal transistor. The external switch also has a higher output voltage when using a boost configuration.
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