Feedback voltage-stabilizing device and method and power supply changeover system applied by same
A technology of power conversion system and voltage stabilization device, which is applied in control/regulation systems, output power conversion devices, electrical components, etc., can solve problems such as circuit damage, circuit instability, and fluctuations in the voltage level of the front-stage circuit.
Inactive Publication Date: 2013-06-12
LIEN CHANG ELECTRONICS ENTERPRISE
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Problems solved by technology
[0002] Generally speaking, there will be a feedback circuit in the power converter to feed back the signal at the output terminal to the previous circuit for drive control or other purposes. In terms of circuit stability, when the feedback signal is returned to the previous circuit, Sometimes it will cause fluctuations in the voltage level of the previous stage circuit, so it is likely to output an incorrect voltage level, or even cause damage to the circuit
[0003] In particular, some power converters provide switch control of one or more output voltages. When the feedback signal returned by the feedback circuit is the output voltage controlled by the switch, at the moment of switch switching, whether it is on or off , the voltage of the feedback signal will have a large change, so it often causes the voltage level of the front-end circuit receiving the feedback signal to fluctuate, thus leading to circuit instability or even circuit damage
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[0027] Please refer to figure 1 , is a block diagram of an embodiment of the feedback regulator device 10 , including a first switch unit 11 , a second switch unit 13 and a conduction control unit 15 . Wherein, the first switch unit 11 is used to control whether to transmit a feedback signal from the terminal A to the terminal B.
[0028] Because the terminal A does not return the feedback signal to the terminal B at any time, the first switch unit 11 needs to be turned on or off according to the status of the feedback signal. Therefore, use the conduction control unit 15 to extract a detection signal from terminal A, such as the voltage of the feedback signal, to determine whether the feedback signal needs to be transmitted back from terminal A to terminal B at this time, and then the conduction control unit 15 is based on the result of the judgment For the control of the first switch unit 11.
[0029] The conduction control unit 15 judges whether the feedback signal needs ...
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The invention provides a feedback voltage-stabilizing device and method and a power supply changeover system applied by the same. The feedback voltage-stabilizing device is used in a feedback circuit and comprises a first switching unit, a second switching unit and a conduction controlling unit, wherein the first switching unit is coupled to the feedback circuit and is used for controlling whether the feedback circuit retransmits a feedback signal from a first end to a second end; the second switching unit is used for retarding the fluctuation of a second end voltage, caused by the feedback signal; and the conduction controlling unit is used for extracting a detection signal and controlling that the first switching unit and the second switching unit are actually switched on in the same time according to the detection signal. Through providing the feedback voltage-stabilizing device to the feedback circuit and switching on the first switching unit and the second switching unit in the feedback voltage-stabilizing device at the beginning of the feedback, the voltage fluctuation at the second end voltage is retarded and the stability of the circuit is further improved.
Description
technical field [0001] The invention relates to a voltage stabilizing device and method and a power conversion system for its application, in particular to a voltage stabilizing device and method for a feedback circuit and a power conversion system for its application. Background technique [0002] Generally speaking, there will be a feedback circuit in the power converter to feed back the signal at the output terminal to the previous circuit for drive control or other purposes. In terms of circuit stability, when the feedback signal is returned to the previous circuit, Sometimes it will cause fluctuations in the voltage level of the previous stage circuit, so it is likely to output an incorrect voltage level, or even cause damage to the circuit. [0003] In particular, some power converters provide switch control of one or more output voltages. When the feedback signal returned by the feedback circuit is the output voltage controlled by the switch, at the moment of switch s...
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IPC IPC(8): G05F1/10H02M7/217
Inventor 陈振刚游柏园
Owner LIEN CHANG ELECTRONICS ENTERPRISE