Power control circuit

A power control circuit, power supply voltage technology, applied in the direction of control/regulation system, electrical components, adjusting electrical variables, etc., can solve the problems of inconsistent logic sequence, unsatisfied DC voltage, slowness, etc.

Inactive Publication Date: 2012-12-12
INVENTEC CORP
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Problems solved by technology

[0003] However, during the voltage measurement process, the slope of the power-on working voltage of the chip is relatively small, and the voltage value of the working voltage end of the chip electrically connected to it rises relatively slowly. When the normal operating voltage is reached, it is possible that the chip enable voltage V EN The predetermined enable threshold has been met, so that the DC voltage output by the chip does not meet the expected voltage value
For example, suppose the powe

Method used

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[0027] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0028] figure 1 Shows a block diagram of the power supply control circuit according to one aspect of the present invention. Reference figure 1 , The power control circuit of the present invention includes a control chip 10 and a control module 12. Wherein, the control chip 10 includes a working voltage input terminal 101 and a chip enable input terminal 103. Specifically, the working voltage input terminal is electrically connected to the first power supply voltage via a series connection module formed by M diodes. The anode of the first diode of the connection module is electrically connected to the first power voltage, and the cathode of the diode at the end of the serial connection module is electrically connected to the working voltage input terminal 101, and M is a natural number. For example, when the operating voltage threshol...

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Abstract

The invention provides a power control circuit. The power control circuit comprises a control chip, a chip enable input end and a control module, the control chip includes a working voltage input end, the working voltage input end is electrically connected to a first power voltage through a series connection module formed by M diodes, when the voltage of the chip enable input end is higher than an enable voltage threshold value, the control chip outputs a second power voltage, the control module is provided with a control input end and a control output end, the control input end and the control output end are electrically connected to the first power voltage and the chip enable input end respectively, and when the voltage value of the working voltage input end is lower than the working voltage threshold value of the control chip, the voltage value of the chip enable input end is lower than the enable voltage threshold value. By means of the power control circuit, the control input end is electrically connected to the first power voltage, the control output end is electrically connected to the chip enable input end, and when the voltage value of the working voltage input end of the control chip is lower than the working voltage threshold value, the voltage value of the enable input end of the control chip is lower than the enable voltage threshold value.

Description

technical field [0001] The invention relates to the output control technology of a DC power supply, in particular to a power supply control circuit in the DC power supply. Background technique [0002] In the prior art, a special power conversion chip is usually used for control in the circuit design of the DC power supply. Generally, the power conversion chip has a power-on working voltage V CC and chip enable voltage V EN , when the power-on operating voltage V CC When the rate of rise is large enough, the power conversion chip first reaches the normal power-on working voltage, and then the chip enable voltage V EN Satisfy the predetermined enabling threshold, so that the chip outputs the desired DC voltage, such as 5V. [0003] However, during the voltage measurement process, the slope of the power-on working voltage of the chip is relatively small, and the voltage value of the working voltage end of the chip electrically connected to it rises relatively slowly. When...

Claims

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Application Information

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IPC IPC(8): H02M3/155
Inventor 赵志强
Owner INVENTEC CORP
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