Circuit converter control system

Abstract

The invention provides a circuit converter control system which is electrically connected to a circuit converter including an input stage circuit, a load switch and an output stage circuit. In the circuit converter control system, a filter is sued for sampling a historical feedback average voltage according to feedback output voltages at different times for digital signals output by an output end at different times; a control module is provided with a voltage threshold, and is used for receiving immediate feedback output voltages for the digital signals output by the output end and detecting the load state of the circuit converter based on the historical feedback average voltage; and the control module controls the load switch at a control duty cycle, increases the control duty cycle for controlling the load switch when the load state is changed from a light load state to a heavy load state and the voltage difference value reaches the voltage threshold, otherwise reduces the control duty cycle. Therefore, the need for time-consuming circuit redesign is not required, and the problem of overshoot and load reduction of the circuit converter can be effectively solved.

Description

technical field [0001] The invention relates to a circuit converter control system, in particular to a circuit converter control system which adopts digital circuit control and adjusts the duty cycle according to the light load state and the heavy load state. Background technique [0002] With the rapid advancement of science and technology, electronic devices have been flooded in people's lives. Among them, with the energy-saving form of consumer electronics and the emphasis on environmental protection, electronic products are required to consume low power during standby to prolong battery life. and reduce power consumption, so how to design circuit converters has become a problem to be solved in the industry. [0003] see figure 1 , figure 1 In order to show a schematic block diagram of a power converter in the prior art of the present invention, generally, a flyback circuit converter includes an analog pulse width modulation (Pulse WidthMoulation, PWM) control switching...

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Problems solved by technology

However, generally speaking, the design of such an analog circuit is relatively inflexible. Specifically, if the circuit converter PA2 is to be operated in a continuous conduction mode (Continuous Conduction Mode, CCM), a discontinuous conduction mode (Discontinuous Conduction Mode, DCM) or Boundary Conduction Mode (Boundary Conduction Mode, BCM), when the circuit needs to be modified, it is limited by the structure of the analog circuit and cannot be reprogrammed, so it is necessary to redesign the internal circuit and the compensation circuit PA26, so that in practice, the less convenient to use

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