A Buck Synchronous Rectification DC-DC Converter with Fast Transient Response
A DC-DC, transient response technology, applied in the direction of converting DC power input to DC power output, instruments, and adjusting electrical variables, can solve the problems of transient response speed reduction, cost increase, unfavorable practical application, etc., and achieve size Effects of reduction, low cost, and small product size
Active Publication Date: 2015-12-30
SOUTHEAST UNIV
View PDF7 Cites 1 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0004] If the average current mode DC-DC converter is used, although there is no problem of sub-harmonic oscillation, the speed of transient response will be greatly reduced
If a higher-order filter is used to filter out the ripple after current sampling, the cost will be greatly increased, which is not conducive to practical application
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
[0031] Below in conjunction with accompanying drawing, the technical scheme of invention is described in detail:
[0032] like figure 1 , a fast transient response buck synchronous rectification DC-DC converter of the present invention, comprising a sawtooth wave generating circuit 1 whose amplitude is controlled by an input voltage Vin, a power tube circuit 2, a power tube driving circuit 3, and a duty ratio signal generating circuit 4 , Output filter network 5, current sampling circuit 6, holding circuit 7, error amplifier circuit 8, voltage divider network 9, output voltage error amplifier circuit 10. One output of the sawtooth wave generating circuit 1 whose amplitude is controlled by the input voltage Vin is connected to the duty cycle signal generating circuit 4, and the other output end is connected to the holding circuit 7, and the output of the duty cycle signal generating circuit 4 is connected to the power tube driving circuit 3, and the power The output of the tub...
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 synchronous rectification DC-DC (Direct Current) converter with rapid transient response buck. One output of a sawtooth wave generating circuit with the amplitude controlled by input voltage Vin is connected with a duty cycle signal generating circuit while the other output end is connected with a retaining circuit; the output of the duty cycle signal generating circuit is connected with a power tube drive circuit; the output of the power tube drive circuit is connected with a power tube circuit; the output of the power tube circuit is connected with an output filter network and a current sampling circuit; one output of the output filter network is connected with a current sampling retaining circuit while the other output is connected with a potential-divider network; the output of the current sampling circuit is connected with the retaining circuit; the output of the potential-divider network is connected with an output voltage error amplifier circuit; the output of the output voltage error amplifier circuit and the output of the retaining circuit are respectively connected with an error amplifier circuit; the output of the error amplifier circuit is connected with the duty cycle signal generating circuit.
Description
technical field [0001] The invention relates to a switching power supply, in particular to a fast transient response buck synchronous rectification DC-DC converter. Background technique [0002] At present, whether it is a processor such as a CPU, DSP or SOC, or other digital integrated circuits, the requirements for the response speed of the power supply voltage are getting higher and higher. The response speed of the supply voltage depends on the switching frequency of the switching power supply and the design of the power loop. In terms of switching frequency, with the improvement of semiconductor technology, the switching frequency of switching power supply is getting higher and higher. The switching frequency of high-speed DC-DC converters available on the market can reach above 2MHz. In terms of loop design, under the same switching frequency, in order to improve the speed of transient response, most people use peak current mode (PCM) switching power supply. In the c...
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 徐申姚云鹏程维昶刘斯扬孙伟锋陆生礼时龙兴
Owner SOUTHEAST UNIV