Evaluation Board For NCP1216, AC-DC Constant Current Buck LED Driver

The NCP1216LEDGEVB is designed to the illustrate the performance of the NCP1216 in a non-isolated AC-DC constant current buck LED driver configuration As designed in the board it is capable of driving up to 1A. By changing some of the resistors on board, lower current performance is possible. The design is based on a peak current control scheme were the 100 kHz PWM controller is operating in the continuous current mode step down configuration. The evaluation board does have a optocoupler input for optional PWM dimming, the optocoupler is required since this is a non-isolated topology and the NCP1216 is in a floating topology. This board is designed for application where the input line voltage ranges from 90? Vac. The NCP1216 features a fixed frequency PWM architecture with built in frequency jittering to minimize the EMI signature and drive capablity of up to 500mA for the external MOSFET, The NCP1216 represents an excellent solution where cost and ease of implementation are at a premium. The NCP1216 has dynamic self supply so it can be powered directly from the HV Bulk voltage. .