Power supply device and control method thereof

Abstract

The invention discloses a power supply device and a control method thereof. The power supply device comprises a power generation module, a detection module and a control module, wherein the power generation module is used for generating test voltage and load current according to control signals; the detection module is used for detecting test current and test voltage received by an outer load; and the control module is used for generating a control signal according to a test voltage setting value. When the test voltage setting value is converted, the control module calculates instantaneous variation of the test voltage setting value at the current time according to the test current at the current time, load current when the test current is zero and instantaneous variation of the test voltage setting value when the test current is zero so as to adjust a test voltage setting value at a next time point.

Description

technical field [0001] The present invention relates to a power supply device and its control method, and in particular to a power supply device capable of automatically adjusting the slew rate of a test voltage setting value and its control method. Background technique [0002] Please refer to figure 1 , figure 1 It is a waveform diagram when the output voltage is adjusted downward according to the existing programmable power supply. Such as figure 1 As shown, when the test voltage provided to the external load by the existing programmable power supply is pulled up according to the test voltage setting value inside the programmable power supply, the test voltage can all meet the internal test voltage of the programmable power supply. The test voltage setting value, so that the test voltage output by the programmable power supply can produce corresponding changes according to the slew rate of the test voltage setting value, for example figure 1 The time interval from tim...

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Problems solved by technology

[0004] Then, when the controller in the programmable power supply determines that the test voltage is lower than the set value of the test voltage (i.e. time point t5), the controller will prepare to enter the enabled state. However, before the controller will enter the enabled state It will take a wake-up time (that is, the time interval from time point t5 to time point t6), but during this period of wake-up time, the test voltage will still continue to drop, resulting in an undershoot phenomenon of the test voltage (that is, the time point t6)

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