Design a low-cost, high-performance LED driver
Datum:2011-05-24 13:31
ngle LED that implements a very fast dimming feature. This is based on a MC33063 which has an internal switch, a current-limit comparator, an oscillator, and an internal reference. A disable function is provided by the pin thats usually used for voltage regulation. In this scenario, a voltage greater than 1.25 V disables the supply while a lower voltage enables it. With the circuit enabled, the controller operates in a current limit/hysteretic mode, because voltage feedback has been eliminated.
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