Buck step-down circuit and its control method based on input voltage feedforward control
A technology of input voltage and control circuit, applied in control/regulation system, output power conversion device, conversion of DC power input to DC power output, etc. Dynamic fluctuation amplitude, improve the effect of dynamic response
Active Publication Date: 2017-11-07
NANJING SILERGY SEMICON TECH CO LTD
View PDF4 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0005] In view of this, the object of the present invention is to provide a Buck step-down circuit based on input voltage feedforward control and its control method, so as to solve the technical problems of slow dynamic response and large dynamic fluctuation amplitude in the prior art
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0022] Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention is not limited to these embodiments. The present invention covers any alternatives, modifications, equivalent methods and schemes made within the spirit and scope of the present invention.
[0023] In order to provide the public with a thorough understanding of the present invention, specific details are set forth in the following preferred embodiments of the present invention, but those skilled in the art can fully understand the present invention without the description of these details.
[0024] In the following paragraphs the invention is described more specifically by way of example with reference to the accompanying drawings. It should be noted that all the drawings are in simplified form and use inaccurate scales, which are only used to facilitate and clearly assist the purpose of illustrating the embodiments of t...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a Buck step-down circuit based on input voltage feedforward control and a control method thereof. The invention adopts the input voltage feedforward control mode, and uses an input voltage sampling signal proportional to the input voltage as a triangular wave signal generating circuit The control signal of the medium voltage-controlled current source makes the peak value of the triangular wave signal proportional to the input voltage. The triangular wave signal is compared with the error amplification signal to obtain the shutdown signal for shutting off the main power switch. During normal operation, the output The voltage is only related to the sampling coefficient of the input voltage, and has no direct relationship with the input voltage. Therefore, the fluctuation of the input voltage has less influence on the output voltage, which improves the dynamic response of the system and reduces the dynamic fluctuation amplitude of the output voltage.
Description
technical field [0001] The invention relates to the technical field of power electronics, in particular to a Buck step-down circuit based on input voltage feedforward control and a control method thereof. Background technique [0002] A Buck circuit generally includes a power stage circuit and a control circuit. The control circuit controls the switch state of the main power switch tube of the power stage circuit to adjust the output voltage, which is lower than the input voltage. The control circuit needs to feedback control the switch state of the main power switch tube according to the change of the output voltage. [0003] Such as figure 1 As shown, it is the output voltage control mode of the prior art, that is, the output voltage is sampled, and the error amplification process is performed between it and the reference signal to obtain the error amplification signal V E , the error amplifies the signal V E Compared with the triangular wave signal, the duty ratio sign...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/156
Inventor 张鑫
Owner NANJING SILERGY SEMICON TECH CO LTD