Multi-clock domain control device and method for switching power supply, and a switching power supply

Abstract

The present invention provides a switch power supply multiple clock domain control device and method, and a switch power supply. The device comprises a plurality of function modules and provides a plurality of clock domains at the same time, and each function module can select different clock frequencies according to its own requirement. The switch power supply multiple clock domain control device and method, and the switch power supply can provide multiple clock domains, each function module can select different clock frequencies according to its own requirement, special signals are used for communication between modules, and the communication is performed through a handshake circuit between the signals of different clock domains to allow the power consumption actual value of the switch power control circuit to reduce more than half.

Description

technical field [0001] The invention relates to the technical field of switching power supplies, in particular to a multi-clock domain control device and method for switching power supplies and a switching power supply. Background technique [0002] The Chinese invention patent with the application number 201010541433.X and the invention title "A Digitally Controlled Switching Power Supply Cross-Clock Domain Controller and Its Control Method" discloses a digitally controlled switching power supply cross-clock domain controller, which is connected to the switching power supply, including Voltage divider network Hsense, analog-to-digital converter ADC, error voltage signal processing module, duty cycle control signal processing module, digital pulse width modulation circuit DPWM, clock logic circuit and drive circuit, duty cycle control signal processing module including digital compensator A register composed of D flip-flops, the output signal Vout(t) of the switching power s...

AI Technical Summary

Problems solved by technology

[0003] However, although the above-mentioned technical solution adopts a cross-clock domain control method, it actually uses two edges of a clock, that is, the rising edge and the falling edge to control two different circuits, so that the frequencies of the two circuits are only can stay at the original clock frequency

In addition, other cross-clock domain control methods in the prior art only simply extend the phase at the original frequency, and cannot expand flexibly with multiple clock frequencies

[0004] To sum up, in the prior art digitally controlled switching power supply, the signals that need to shake hands between the two clock domains cannot be stably communicated, resulting in high power consumption of the switching power supply chip

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