a dcdc converter
A converter and comparator technology, applied in output power conversion devices, instruments, DC power input conversion to DC power output and other directions, can solve problems such as increasing system quiescent current, increasing system cost, and reducing system performance, etc. Achieve the effect of saving chip area and reducing power consumption
Active Publication Date: 2017-01-04
SG MICRO
View PDF6 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
The above transformation process requires a V to I structure with large power consumption and R13 as shown in the figure. This structure increases the quiescent current of the system and reduces the performance of the system, and increases the area of the layout to increase the system’s cost, reducing the competitiveness of the product
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
[0020] Below with the accompanying drawings ( Figure 4 ) to illustrate the present invention.
[0021] Figure 4 It is a schematic diagram of the circuit structure of a DCDC converter implementing the present invention. Such as Figure 4As shown, a DCDC converter includes an input voltage terminal Vcc, an output voltage terminal Vout, an error amplifier EA and a pulse width modulation comparator PWM, the positive terminal (+) of the error amplifier EA is connected to the reference voltage terminal Vref, so The negative end (-) of the error amplifier EA is connected to the feedback voltage terminal Vfb, and the output end of the error amplifier EA is connected to a level conversion circuit so that the difference voltage Vea at the output end of the error amplifier is converted into a difference conversion voltage Veas, and the difference The value conversion voltage Veas is input to the positive terminal (+) of the pulse width modulation comparator PWM, and the negative ter...
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
A kind of DC-DC converter is conducive to reducing power consumption and saving chip area, is characterized in that, comprises input voltage end, output voltage end, error amplifier and pulse width modulation comparator, the forward end of described error amplifier is connected with reference voltage end , the negative end of the error amplifier is connected to the feedback voltage end, the output end of the error amplifier is connected to a level conversion circuit so that the difference voltage at the output end of the error amplifier is converted into a difference conversion voltage, and the difference conversion voltage is input into the The positive terminal of the pulse width modulation comparator, the negative terminal of the pulse width modulation comparator is connected to the sampling signal terminal, and the sampling signal terminal is connected to the input voltage terminal through a MOS transistor.
Description
technical field [0001] The invention relates to a DC-DC conversion technology for converting a DC power supply to a DC power supply, in particular to a DC-DC converter, which is beneficial to reducing power consumption and saving chip area. Background technique [0002] figure 1 It is a schematic diagram of a circuit principle of a DC-DC converter based on voltage mode control in the prior art. DC (DirectCurrent) refers to direct current, and DCDC (also denoted as DC-DC, direct current-direct current) refers to the conversion of direct current to direct current that changes the direct current parameters. In a DCDC converter, as in figure 1 Take the Buck structure as an example, the principle of the voltage mode control system is: the feedback voltage Vfb is the sampling voltage of the output voltage Vout, the difference between Vfb and the reference voltage Vref is amplified by the error amplifier EA, and then the amplified difference is the error The amplifier output vol...
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): H02M3/155
Inventor 陈建春其他发明人请求不公开姓名
Owner SG MICRO