Unlock instant, AI-driven research and patent intelligence for your innovation.

Control circuit and boost circuit

A technology of control circuit and boost circuit, which is applied in the direction of control/regulation system, electrical components, and adjustment of electric variables, etc., which can solve the problems of DC-DC boost converter's output voltage hook or step, and achieve higher output voltage Effect

Active Publication Date: 2021-05-18
深圳市拓尔微电子有限责任公司
View PDF8 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the present application provides a control circuit and a boost circuit, which are used to solve the problem that the output voltage of the DC-DC boost converter has a rebound or a step phenomenon

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 more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Control circuit and boost circuit
  • Control circuit and boost circuit
  • Control circuit and boost circuit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0054] In the current DC-DC boost converter, the charging time and discharging time of the inductor remain unchanged. In the process of discharging the inductor, after the output voltage of the DC-DC boost converter is higher than the input voltage, the discharging speed of the inductor becomes slower. , the energy released when the inductor discharges is less than the energy released when the output voltage is lower than the input voltage, so the remaining energy of the inductor will gradually increase after each discharge. During each charging process of the inductor, the energy stored in the inductor continues to increase. When the current of the inductor is too large, the phenomenon of inductive overshoot will occur, and the output voltage will accelerate to rise. When this phenomenon is detected, the DC-DC boost converter adjusts according to the loop response, reducing the charging time of the inductor and increasing the discharging time of the inductor, so that the avera...

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

No PUM Login to View More

Abstract

The invention provides a control circuit and a booster circuit, and relates to the technical field of circuits, and the control circuit comprises a pulse width modulation sub-module, an oscillator and a logic sub-module. The pulse width modulation sub-module is used for adjusting a pulse width modulation wave output by the pulse width modulation sub-module according to a received first feedback signal, the oscillator is used for adjusting a clock signal output by the oscillator according to a received second feedback signal, and the logic sub-module is used for controlling the on-off state of an NMOS in the booster circuit and adjusting the conduction time of a PMOS in the booster according to the pulse width modulation wave and the clock signal. In the technical scheme provided by the invention, the control circuit adjusts the conduction time of the PMOS and the NMOS, so that before and after the output voltage is higher than the input voltage by the preset voltage threshold, the discharge capacity of the inductor when the PMOS is conducted is the same as the charge capacity of the inductor when the NMOS is conducted, namely, the average current of the inductor is kept unchanged, and the output voltage can be smoothly improved.

Description

technical field [0001] The present application relates to the field of circuit technology, in particular to a control circuit and a boost circuit. Background technique [0002] The battery supply voltage of portable equipment is constantly developing towards low voltage, and some functions of portable equipment still require high voltage power supply. Therefore, DC (direct current)-DC boost converters are usually used in portable equipment to convert the low voltage of the battery supply voltage to high voltage. Voltage. [0003] In the related art, the DC-DC boost converter can adopt BOOST topology circuit, see figure 1 , shows the waveform diagram of the input voltage (Vin) and output voltage (Vout) of the DC-DC boost converter. When the output voltage of the DC-DC boost converter is lower than the input voltage, the output voltage rises smoothly. In When the output voltage is higher than the input voltage, the inductor discharge rate becomes slower. However, due to the...

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
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/158H02M1/088H02M1/36
CPCH02M1/083H02M1/088H02M1/36H02M3/158
Inventor 王红义毛豪
Owner 深圳市拓尔微电子有限责任公司