Clock domain crossing controller of digital control switch power supply and control method thereof
A switching power supply, cross-clock domain technology, applied in the field of electronics, can solve the problems of inability to realize real-time control of the system, inability to know the data cycle, not the latest data, etc., to save system power consumption, overcome data delay steady state, data Handle the effects of partial optimization
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[0023] Such as image 3 with Figure 8 , The controller of the present invention includes a voltage divider network H sence , Analog-to-digital converter, error voltage signal processing module, digital compensator, PWM signal output module, drive circuit and clock logic circuit. Switching power supply output data V out (t) After being divided by the voltage divider network, it is collected by ADC and quantified to obtain V o [n], and the preset discrete reference voltage V ref [n] The error voltage signal e[n] obtained by subtraction is sent to the digital compensator for data processing, and then modulated by the digital pulse width modulation circuit DPWM to generate the voltage control signal of the switching power supply, which is controlled by the drive circuit to increase the drive capacity Switching power supply power tube opening and closing. The controller adjusts the size of the duty cycle in each switching cycle of the switching power supply, that is, controlled ...
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