Device for controlling output voltage of synchronous rectification chip to change along with current and adjusting method
A technology of output voltage and synchronous rectification, which is applied in the electronic field and can solve problems such as low voltage and system performance impact
Inactive Publication Date: 2020-10-23
WUXI YINGNUOPUSI MICROELECTRONICS
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Problems solved by technology
Since a 0.5-1.5m long wire is usually connected to the output end of the printed circuit board (PCB) or other adapters, when carrying a load of more than 2A, the connection end of the PCB board to the other end of the client device application end The wire will produce a certain line voltage drop due to the current flowing through it. When it is unloaded or loaded, the voltage changes by about 0.5-1V, resulting in a low voltage on the application device side of the power adapter after loading, which will have a certain impact on system performance.
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[0023] In order to make the object, technical solution and advantages of the present invention clearer, specific embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention.
[0024] In addition, it should be noted that, for the convenience of description, only parts related to the present invention are shown in the drawings but not all content. Before discussing the exemplary embodiments in more detail, it should be mentioned that some exemplary embodiments are described as processes or methods depicted as flowcharts. Although the flowcharts describe various operations (or steps) as sequential processing, many of the operations may be performed in parallel, concurrently, or simultaneously. In addition, the order of operations can be rearranged. The process...
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The embodiment of the invention discloses a device for controlling the output voltage of a synchronous rectification chip to change along with current and an adjusting method. The control device comprises a signal acquisition module used for obtaining a control signal according to a load current; an integrated signal processing module which is used for carrying out optimization processing on the control signal; an output regulation signal synthesis module which is used for determining a corresponding control current signal according to the optimized control signal; and an output adjusting signal control port which is used for connecting the current control signal to a feedback control element on the PCB. According to the technical scheme provided by the embodiment of the invention, the load current is sampled, and the current control signal with the proper proportion is outputted so that the output voltage of the PCB is indirectly adjusted, the problem that the terminal voltage of customer application equipment is relatively low after the load is loaded due to the problem of wire voltage drop is solved, and the function of wire voltage compensation is realized.
Description
technical field [0001] The embodiments of the present invention relate to the field of electronic technology, and in particular to a control device and an adjustment method for changing the output voltage of a synchronous rectification chip with current. Background technique [0002] In recent years, with the rapid upgrading of consumer electronic products, etc., the requirements for the performance of integrated circuits are also getting higher and higher. [0003] In the prior art, in actual adapter applications, some semiconductor devices, such as Schottky diodes, can reduce rectification losses. Since a 0.5-1.5m long wire is usually connected to the output end of the printed circuit board (PCB) or other adapters, when carrying a load of more than 2A, the connection end of the PCB board is connected to the application end of the client device at the other end. The wire will produce a certain line voltage drop due to the current flowing through it. When it is unloaded or ...
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IPC IPC(8): G05F1/56
CPCG05F1/561
Inventor 沈西琪顾松山
Owner WUXI YINGNUOPUSI MICROELECTRONICS