Power output bleeder circuit and power system
A bleeder circuit and power output technology, which is applied in the field of power supply output bleeder circuits and power supply systems, can solve the problems of false triggering of the bleeder module, affecting the determination of the reference voltage, and the reference voltage and the output voltage being easily interfered.
Pending Publication Date: 2019-08-23
GUANGZHOU ZHIYUAN ELECTRONICS CO LTD
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Problems solved by technology
[0004] Based on this, it is necessary to aim at the reference voltage and the output voltage are easily disturbed in the traditional bleeder module used to bleed the output current of the power supply, which will affect the judgment of the reference voltage and cause the bleeder module to be falsely triggered. A power output discharge circuit and power system
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[0043] In order to better understand the purpose, technical solutions and technical effects of the present invention, the present invention will be further explained below in conjunction with the drawings and embodiments. At the same time, it is stated that the embodiments described below are only used to explain the present invention, not to limit the present invention.
[0044] The embodiment of the present invention provides a power output bleeder circuit.
[0045] figure 1 It is a block diagram of the power output bleeder circuit module of an embodiment, such as figure 1 As shown, the power output discharge circuit of an embodiment includes a voltage boost module 100, a comparison module 101, and a discharge module 102;
[0046] The input terminal of the voltage boost module 100 is used to connect to the reference voltage, the output terminal of the voltage boost module 100 is used to connect to the first input terminal of the comparison module 101, and the second input terminal ...
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The invention relates to a power output bleeder circuit and a power system. A reference voltage is boosted to a preset voltage value through a voltage boosting module. The boosted reference voltage iscompared with the output voltage of a power supply. When the boosted reference voltage is lower than the output voltage of the power supply, a comparison module outputs a switch level signal to the controlled end of a discharge module. Therefore, a circuit between the first connecting end and the second connecting end of the discharge module is conducted. The output discharge of the power supplycan be controlled to be opened or closed without an extra logic signal. Furthermore, the output current of the power supply is discharged through the discharge module, so that the output voltage is reduced. Based on the above fact, through a preset voltage value in direct proportion to the reference voltage, the interference on the reference voltage is eliminated. The influence of drift of the device value in the voltage boosting module on the preset voltage value is eliminated. The reduction of the output voltage caused by the false triggering of the discharge module is prevented.
Description
Technical field [0001] The present invention relates to the technical field of power supply circuits, in particular to a power output bleeder circuit and a power supply system. Background technique [0002] In power supply applications, a faster response is often required. For example, when the reference voltage decreases, the output voltage of the power supply also requires a faster response speed, that is, the output current of the power supply needs to be discharged quickly to reduce the output voltage. Among them, the two output terminals of the power supply are generally connected to each other through an output capacitor, and the output voltage is the voltage at both ends of the output power supply. [0003] However, in the traditional bleeder circuit used to bleed the output current of the power supply, an additional processor is required to determine whether the output current of the power supply needs to be bleeded, and an additional logic signal line is also required to i...
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Login to View More IPC IPC(8): H02H9/04
CPCH02H9/041
Inventor 周立功彭浩魏小忠黎宇孙大龙
Owner GUANGZHOU ZHIYUAN ELECTRONICS CO LTD