Output voltage negative overshoot suppression device and method for DC-DC switching circuit
A technology of DC-DC and conversion circuits, which is applied in the field of negative overshoot suppression devices for the output voltage of DC-DC conversion circuits, can solve problems that are difficult to eliminate, and achieve the effects of reducing bad situations, improving performance and improving reliability
Active Publication Date: 2015-04-15
GUANGDONG VTRON TECH CO LTD
View PDF4 Cites 1 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Since the stray inductance and stray capacitance at the output end of the power circuit are parasitic circuit parameters, it is difficult to completely eliminate them.
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
[0014] The accompanying drawings are for illustrative purposes only and cannot be construed as limiting the patent;
[0015] In order to better illustrate this embodiment, some parts in the drawings will be omitted, enlarged or reduced, and do not represent the size of the actual product;
[0016] For those skilled in the art, it is understandable that some well-known structures and descriptions thereof may be omitted in the drawings.
[0017] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0018] like figure 2 , 3 , a DC-DC conversion circuit output voltage negative overshoot suppression device, used to suppress the DC-DC conversion circuit output voltage negative overshoot, the output voltage negative overshoot suppression device is connected to the output of the DC-DC conversion circuit, the The output voltage negative overshoot suppression device includes a capacitor EC45,...
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 an output voltage negative overshoot suppression device and method for a DC-DC (Direct Current) switching circuit. The output voltage negative overshoot suppression device is used for suppressing negative overshoot of voltage outputted by the DC-DC switching circuit, and connected with the output end of the DC-DC switching circuit, and comprises a capacitor EC45, wherein the capacitor EC45 is connected in parallel with the output end of the DC-DC switching circuit; the capacitance of the capacitor EC45 is times more than the output capacitance of the DC-DC switching circuit. The output voltage negative overshoot suppression device disclosed by the invention eliminates a resonance source composed of stray inductors and capacitors, and completely eliminates the negative overshoot voltage. According to the suppression device disclosed by the invention, the large capacitor with the capacitance times more than the output capacitance of the DC-DC switching circuit (a power supply of a direct current module) is connected in parallel with the output end of the power supply of the direct current module; after the power supply of the direct current module is power-off, when the output current is choppy, the stray inductors cannot generate resonance with the capacitor, so that the resonance is completely eliminated; without the resonance, the output voltage can be normally reduced, so that the purpose of eliminating the output voltage negative overshoot of the power supply of the direct current module can be achieved.
Description
technical field [0001] The present invention relates to the field of power supplies, and more specifically, to a device and method for suppressing negative overshoot of output voltage of a DC-DC conversion circuit. Background technique [0002] In the use of DC-to-DC module power supplies, some DC module power supplies have the problem that the output voltage drops to zero volts and then continues to drop after the input voltage is cut off, and becomes a negative voltage after crossing the zero potential, which makes the negative overshoot of the output voltage serious. This negative overshoot voltage exceeds the range required for use, because the negative voltage of the power supply voltage of many chips is very small, and the negative voltage limit of most chips is a few tenths of a volt (-0.1V to -0.3V). Therefore, the output Poor handling of voltage negative overshoot will cause harm to the chip at the load end, reduce the safety of the chip at the load end, and bring h...
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 Applications(China)
IPC IPC(8): H02M1/14
CPCH02M1/14H02M1/32
Inventor 帅孟奇
Owner GUANGDONG VTRON TECH CO LTD