H34063AP

The H34063AP is a Series of monolithic control circuit containing the primary functions required for DC-to-DC converte rs. The device includes an internal temperature compensated reference, comparator, controlled duty cycle oscillator with an active current limit circuit, driver and high current output switch. H34063AP was specifically used by Hi-Since rity Microelectronics Corp.

Features of the H34063AP are:(1)3V to 40V input voltage operation;(2)internal 1.6A peak current switch;(3)internal ±1.8% reference;(4)low quiescent current at 1.6mA;(5)frequency operation from 100Hz~100KHz;(6)current limiting.

The absolute maximum ratings and electrical characteristics(Vcc=5V,Ta=25°C) of the H34063AP can be summarized as:(1):supply voltage is 40 V;(2):comparator input voltage range is -0.3V to 40 V;(3):switch collector voltage is 40 V;(4):switch emitter voltage is 40 V; (5):switch collector to emitter voltage is 40 V;(6):driver collector voltage is 40 V;(7):switch current is1.6 A;(8):power dissipation DIP package(Ta=25°C)is 1.0 W;(9):thermal resistance junction to air is 125 °C / W.Electrical characteristics:(1)charging current is 25uA min,35uA typ and 42uA max when VCC is betw een 5.0V and 40V;(2):voltage amplitude is 0.6V typ of pin3;(3):current limit sense voltage is 250mV min,300 mV typ and 350mV max when IChg is Idischg;(4):saturation voltage, darlington connection is 1.0 V typ and 1.3V max when ISW is 1.0A and VC(Driver) is VC(Switch);(5):DC current gain is 50V min and 75V typ when ISW is 1.0A and VCE is 5.0V.etc.