hassanmd
Member level 1
i am using TL497A for inverting Power supply from 12 to -18. all the circuit is like on datasheet. but the Sense resisitor and Transistor get heated at load and power down the voltage to -15 volt. without load nothing is heated and voltages are full.
i think the base current ,determined by the resistor network from Vcc may cause it. but ihave tested with diferent Ib. but no use. Or PCB lay out can be the problem?? can any one help.
i have attached the datasheet.
i think the base current ,determined by the resistor network from Vcc may cause it. but ihave tested with diferent Ib. but no use. Or PCB lay out can be the problem?? can any one help.
i have attached the datasheet.