Power device and power feedback circuit thereof

A power supply equipment and feedback circuit technology, applied in the power supply field, can solve problems such as dangerous economy, poor connection, loss, etc., and achieve the effects of ensuring normal operation, stable input voltage, and fast processing speed
CN107565799AActive Publication Date: 2018-01-09GUANGDONG OPPO MOBILE TELECOMM CORP LTD
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
GUANGDONG OPPO MOBILE TELECOMM CORP LTD
Publication Date
2018-01-09

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Abstract

The invention discloses a power device and a power feedback circuit thereof. The circuit comprises a first voltage feedback end and a second voltage feedback end that are used for correspondingly connecting with a positive feedback pin and a negative feedback pin in a power connection port of the power device, a first comparison unit used for outputting a first comparison signal according to a voltage fed back by the second voltage feedback end and a first reference voltage provided by a first reference voltage providing unit, so as to control on and off of a second switch transistor, a secondcomparison unit used for outputting a second comparison signal according to a voltage fed back by the first voltage feedback end and a second reference voltage provided by a second reference voltageproviding unit, so as to control on and off of a first switch transistor, and a differential amplification unit used for outputting a feedback voltage to a voltage adjustment unit of the power deviceaccording to on and off states of the first switch transistor and the second switch transistor, wherein the voltage adjustment unit adjusts an output voltage according to the feedback voltage, so as to enable the output voltage of the power connection port to meet the requirement of a load end device.
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Description

technical field

[0001] The invention relates to the technical field of power supplies, in particular to a power feedback circuit of a power supply device and a power supply device. Background technique

[0002] In related technologies, there are mainly two schemes for the design of the power supply feedback circuit: one is near-end feedback, that is, the feedback voltage signal is directly extracted from the voltage output port of the voltage supply device, and the feedback voltage signal is input to the power module feedback network; the other is It is remote feedback, that is, the lead wire from the voltage input port of the load device, and the feedback voltage signal is connected to the power feedback network from the voltage output port of the voltage supply device. The above two solutions require that the feedback voltage signal line and the power module feedback network are in a good connection state, and no missing or wrong connections are allowed.

[0003] If the c...

Claims

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