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Cascaded converter boosts LED-drive capability
A two-stage boost converter can drive a string of 20 to 30 LEDs. Details... more...
Voltage timer monitors line-connected ac loads
A one-wire counter and an optoisolator keep track of the on-time of an ac load. Details... more...
Voltage doubler uses inherent features of push-pull dc/dc converter
Paralleled Darlingtons drive a wide-range voltage doubler. Details... more...