The MC34063 contains a single-chip control circuit for the main functions required by the DC/DC converter, and is used in the control core of the boost converter, buck converter, and inverter.
Pin 1: the collector terminal of the switch tube T1;
Pin 2: switch tube T1 emitter terminal;
Pin 3: timing capacitor ct terminal; adjust ct to change the operating frequency in the range of 100-100kHz;
Pin 4: power ground;
Pin 5: the voltage comparator inverting input terminal, and also the output voltage sampling terminal; when using, it should be connected with two precision resistors with an accuracy of at least 1%;
Pin 6: power supply;
Pin 7: load peak current (Ipk) sampling end; when the voltage between 6,7 feet exceeds 300mV, the chip will start the internal overcurrent protection function;
Pin 8: Drive tube T2 collector terminal.
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