Turn-off time compensation circuit, compensation method and switch converter
A switching converter and off-time technology, applied in the field of switching converters and off-time compensation circuits, can solve the problems of difficulty in taking advantage of the current control mode, complex circuits, etc., to expand the stable working range and small occupancy. the effect of
Active Publication Date: 2019-11-26
晶艺半导体有限公司
View PDF3 Cites 1 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
This kind of method is not only complicated to realize the circuit, but also difficult to take advantage of the current control mode after switching
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
[0032] Specific embodiments of the present invention will be described in detail below, and it should be noted that the embodiments described here are only for illustration, not for limiting the present invention. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one of ordinary skill in the art that these specific details need not be employed to practice the present invention. In other instances, well-known circuits, materials or methods have not been described in detail in order to avoid obscuring the present invention.
[0033] Throughout this specification, reference to "one embodiment," "an embodiment," "an example," or "example" means that a particular feature, structure, or characteristic described in connection with the embodiment or example is included in the present invention. In at least one embodiment. Thus, appearances of the phrases "in on...
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 turn-off time compensation circuit for a switch converter and used for compensating turn-off time. The compensation circuit comprises a turn-on time judgment circuit for receiving turn-on signal prompt signals about the begin and the end of the turn-on time of the switch converter, wherein the turn-on time judgment circuit generates the turn-on time judgment signal to prompt the difference between the turn-on time in the current switch cycle and the shortest turn-on time according to the promoted turn-on time; a turn-off compensation setting circuit for receiving andgenerating a turn-off time compensation signal according to the turn-on time judgment signal, and used for compensating the turn-off time of the switch converter, wherein the turn-off time compensation signal prolongs the turn-off time in the current switch cycle in the turn-on time in the current switch cycle is less than the preset shortest turn-on time, thereby corresponding prolonging the current switch cycle. The tiny duty ratio can be realized by the switch converter applying the turn-off time compensation switch in the work, and the stable work range is broadened.
Description
technical field [0001] The invention relates to an electronic circuit, in particular to an off-time compensation circuit, a compensation method and a switching converter. Background technique [0002] With the development of industrial technology, the operating frequency of switching converter control chips is getting higher and higher in order to meet the smaller and smaller requirements of peripheral devices, but with the increase of operating frequency, it also brings some other application problems. [0003] Traditional switching converter control feedback control methods are roughly divided into three categories: current mode, voltage mode and hysteretic control. Among them, the current mode is still the most important control mode in the switching converter due to its stable frequency and easy-to-control output current capability. In the current control mode, in order to prevent the false feedback caused by the ringing phenomenon caused by the parasitic effect when th...
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): H02M1/08H03K17/284
CPCH02M1/08H03K17/284
Inventor 李涅李伊珂
Owner 晶艺半导体有限公司