High Speed ​​Dual Switching Regulator Circuit

High Speed ​​Dual Switching Regulator Circuit

Shown is a high-speed dual- channel switching regulator circuit, which is also commonly used in the inverter circuit of LCD displays. The
TL1451A chip is the core component of this circuit. In this circuit, the t power circuit supplies power to the @ pin of the chip. The oscillator ar PWM comparator
    in the chip constitutes a PWM signal generation circuit. It generates two PWM signals and is output by the @ pin and the @ pin respectively. The PWM signal output by the chip is amplified by the complementary push-pull amplifier to control the output transistor t to change the power supply voltage into a pulse voltage, and then outputs a DC voltage through the LC filter. The output circuit uses a step-down type to output a lower DC voltage. The output stage uses a boost type to output a higher voltage.