The MIC2196 current mode boost controller is used to implement a LED Driver with PWM DIM control. The LED series string is pulsed on and off by the PWM DIM input signal to provide true PWM dimming. When pulsed on the LED, current is regulated by the high frequency current mode boost converter. The converter is designed as a constant current not a constant voltage output boost converter. The under voltage lockout is used to prevent operation below about 9.5V. The input of the converter is 12V nominal and the output can be from 17V to 30Vdc.
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