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

Self-adaptive constant on-time step-down DC converter and on-time control circuit

A technology of DC converter and control circuit, applied in the direction of converting DC power input to DC power output, control/regulation system, output power conversion device, etc., can solve the problems of switching frequency disturbance, DCDC oscillation, large ripple change, etc. , to achieve the effect of reducing the large ripple change and reducing the oscillation

Active Publication Date: 2022-05-13
SHENZHEN SIYUAN SEMICON CO LTD
View PDF7 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, if the design of load I1 and load I2 is unreasonable, then the equivalent resistance R0 will have a large ripple change when the two resistance values ​​are switched, and it will cause disturbance to the switching frequency, causing DCDC to switch back and forth at this load point. Switching Causes Oscillation

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
  • Self-adaptive constant on-time step-down DC converter and on-time control circuit
  • Self-adaptive constant on-time step-down DC converter and on-time control circuit
  • Self-adaptive constant on-time step-down DC converter and on-time control circuit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0085] The present invention is described below based on examples, but the present invention is not limited to these examples. In the following detailed description of the present invention, some specific details are described in detail, and in order to avoid obscuring the essence of the present invention, known methods, procedures, procedures, and components are not described in detail.

[0086] Additionally, those of ordinary skill in the art will appreciate that the drawings provided herein are for illustrative purposes and are not necessarily drawn to scale.

[0087] Unless the context clearly requires, throughout the specification and claims, "comprises", "comprises" and similar words should be interpreted in an inclusive sense rather than an exclusive or exhaustive meaning; that is, "including but not limited to" meaning.

[0088] In the description of the present invention, it should be understood that the terms "first", "second" and so on are used for descriptive purp...

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 discloses a self-adaptive constant on-time step-down direct current converter and an on-time control circuit, the on-time control circuit comprises a timing module, a comparator, a variable resistance module and a control voltage generation module, the control voltage generation module is used for changing the magnitude of control voltage in a small step mode; the control end of the variable resistance module responds to the magnitude of the control voltage to generate equivalent resistance with the corresponding magnitude, so that the resistance value of the equivalent resistance changes towards the first resistance value or the second resistance value in a small-step mode, and the charging current changes along with the change of the equivalent resistance; when the voltage to ground rises to the output voltage, the comparator outputs a turn-off signal so as to control the conduction time of the synchronous tube. According to the technical scheme, when the state of the direct-current converter is switched, the direct-current converter can be gradually switched from one state to the other state, the problem that ripple changes are large during switching caused by instant switching of the two states is solved, and oscillation caused by state switching is reduced.

Description

technical field [0001] The invention relates to the technical field of switching power supplies, in particular to an adaptive constant on-time step-down DC converter and a on-time control circuit. Background technique [0002] ACOT BUCK DCDC (Adaptive Constant On-time Step-Down DC Converter) as a step-down regulated DC converter with fast transient response is applied to various power supply systems that require fast transient response. In these In the power supply system, it is often required that the power provided by the DCDC has a small output voltage ripple, so as to facilitate the stability of the lower-level applications: for example, to supply power to the Bluetooth module. [0003] Please refer to figure 1 , is a schematic diagram of a conventional ACOT BUCK DCDC circuit structure. The principle of ACOT BUCK DCDC is to periodically control the alternate conduction of the synchronous tube MP1 and the rectifier tube MN1 through the loop to generate a stable output vo...

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
IPC IPC(8): H02M1/088H02M3/157H02M3/158H02M1/14H03K5/04
CPCH02M1/088H02M3/157H02M3/1588H02M1/14H03K5/04
Inventor 伍滔
Owner SHENZHEN SIYUAN SEMICON CO LTD