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Device and method for driving laser diode array with high power pulse current by low side linear drive with protection of laser diode array and monitoring and adjustment of power efficiency
Device and method for driving laser diode array with high power pulse current by low side linear drive with protection of laser diode array and monitoring and adjustment of power efficiency
A multi-stage laser drive circuit includes a variable common potential source, a PA light-emitting array between a storage capacitor and a current node, first and second low-side linear current sinks in electrical communication with the current node, and a second master oscillator (MO) light-emitting array in electrical communication between the current node and the first low side linear current sink. A trickle current circuit drives a low-value trickle current through the arrays, and a sense circuit senses the trickle current. Also, the headroom voltage across a pass element in the first low-side linear constant current sink is monitored and adjusted for maximum efficiency.
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