A Reference Voltage Correction Circuit for Controlling Buck Converter and Its Application
A reference voltage and correction circuit technology, which is applied in the direction of control/regulation systems, instruments, and adjustment of electrical variables, etc., can solve problems such as duty cycle changes, differential linear adjustment rates, etc., and achieve elimination of output voltage errors, fast response, and common mode The effect of a wide input voltage range
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[0018] The present invention will be further described below in conjunction with accompanying drawing, and the structure and principle of this device are very clear to those skilled in the art. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0019] see figure 1 , the negative input voltage VREF is set at the negative end of the comparator EA, and the non-inverting input voltage FB is set at the positive end of the comparator EA. The source S is connected to the constant current source 2I and the other end of the capacitor C and grounded, the drain D of the field effect transistor is connected to the resistor R1 and one end of the constant current source I, the other end of the resistor R is connected to the input voltage VREF line, and the constant current source I is another One end is equipped with a power supply VDD, the drain of the FET is VREF_C, and VREF_C is the r...
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