Labels:text | black and white | newspaper | parallel | printing | paper OCR: Tek Stop: 500 S/S 1 Acqs the amount of charge in L1 and the load current between Vout and the ground supply. We can maintain a constant Vout for a variety of loads by controlling the amount of time Q1 is switched on. Fig.6 shows the circuit configura- Ch1 Pk-Pk tion of the switching oscillator which 80 V modulates the output voltage of the step-up converter. Heart of the circuit is an IR2155 made by International Rectifier Corporation in the USA. It is described as a "high side self-oscillat- ing power Mosfet/IGBT gate driver". It is the ideal device where Mosfets or IGBT's need to be driven in a variety of configurations. Resistor R1 and capacitor C1 at pins 2 and 3 set the oscillator frequency and the result is that Mosfets Q1 and Ch1 M200ms Ch1 } Q2 are turned on and off alternately, 20 ...
