A control circuit, control method and voltage conversion circuit
A voltage conversion circuit and control circuit technology, applied in the field of electronics, can solve the problems of unfavorable product versatility and inability to be compatible with optocouplers at the same time, and achieve the effect of improving adaptability and convenience, saving circuit resources, and optimizing system debugging.
Active Publication Date: 2022-03-22
SHENZHEN KIWI MICROELECTRONICS CO LTD
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Problems solved by technology
[0005] The optocoupler connection methods of the above two architectures need to be implemented with different internal circuits, and cannot be compatible with optocoupler High-side and Low-side connections on the same control circuit at the same time. There are limitations in product application, which is not good for product versatility.
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[0035] In order to further understand the present invention, the preferred embodiments of the present invention are described below in conjunction with examples, but it should be understood that these descriptions are only to further illustrate the features and advantages of the present invention, rather than limiting the claims of the present invention.
[0036] The description in this part is only for several typical embodiments, and the present invention is not limited to the scope of the description of the embodiments. Combinations of different embodiments, mutual replacement of some technical features in different embodiments, mutual replacement of the same or similar prior art means and some technical features in the embodiments are also within the scope of description and protection of the present invention.
[0037] "Coupling" or "connection" in the specification includes both direct connection and indirect connection. An indirect connection is a connection through an ...
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The present invention proposes a control circuit, a control method, and a voltage conversion circuit, wherein the control circuit includes a power supply port, a feedback signal port, and a reference ground port, and the control circuit also includes a first switch tube for forming different feedback paths. A switch tube is coupled to the feedback signal port. When the first switch tube is turned off, a first feedback path is formed between the feedback signal port and the power supply port to provide a voltage feedback signal. When the first switch tube is turned on, the feedback signal port is based on the first A switch tube forms a second feedback path and provides a voltage feedback signal. The control circuit proposed by the present invention can realize closed-loop feedback compatible with optocoupler high-potential connection and low-potential connection, optimize system debugging, reduce material costs, improve the adaptability and convenience of the power supply system, and provide users with more choices.
Description
technical field [0001] The present invention relates to the field of electronics, specifically but not limited to a control circuit, a control method and a voltage conversion circuit. Background technique [0002] Optocoupler feedback is mainly used in isolated secondary side feedback (SSR) control applications. Its main purpose is to obtain the feedback signal of the secondary side in real time through the optocoupler on the primary side while isolating the electrical connection between the primary side and the secondary side. [0003] In typical applications, the SSR optocoupler feedback is figure 1 The coupling circuit shown is dominant and is called a low-side (Low-Side) connection. Among them, the ratio of the signal fed back and received by the feedback terminal U1A of the optocoupler and the receiving terminal U1B is 1:1 under typical application conditions, that is, the CTR transmission ratio is generally set at about 1. The internal circuit structure of the optoco...
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IPC IPC(8): H02M1/08H02M3/335
CPCH02M1/08H02M3/335
Inventor 林官秋胡长伟金伟祥
Owner SHENZHEN KIWI MICROELECTRONICS CO LTD