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An anti-overshoot circuit for constant voltage control power supply

A constant voltage control and control circuit technology, applied in electrical components, output power conversion devices, etc., can solve the problems of long startup time and high overshoot voltage, and achieve the effect of reducing charging startup time and overshoot voltage.

Active Publication Date: 2021-10-22
成都启臣微电子股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, in order to solve the above-mentioned problems in the prior art, the object of the present invention is to provide an anti-overshoot circuit for a constant voltage control power supply to simultaneously solve the problems of longer start-up time and higher overshoot voltage

Method used

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  • An anti-overshoot circuit for constant voltage control power supply

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Embodiment 1

[0024] Such as figure 1 As shown, in this embodiment, an anti-overshoot circuit for constant voltage control power supply is provided, aiming to solve the problems of long start-up time and high overshoot voltage through the anti-overshoot circuit, the core of which is to The compensation control voltage in the start-up phase is forced to control. The anti-overshoot circuit includes: a power supply control circuit and an anti-overshoot control circuit.

[0025] ① Power control circuit part

[0026] The power supply control circuit is the output power control part of the constant voltage control power supply. According to the comparison between the current feedback voltage VFB and the internal reference voltage VREF, the output power control result is obtained, and the output power of the power supply is increased (decreased) through the control result.

[0027] The power supply control circuit includes an operational amplifier VEA, the positive input terminal IP of the opera...

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Abstract

The invention discloses an anti-overshoot circuit for a constant voltage control power supply, which belongs to the technical field of integrated circuits. The power supply control circuit in the circuit includes an operational amplifier. Connect the reference voltage VREF to the input terminal; the anti-overshoot circuit is connected with the reverse input terminal of the operational amplifier and obtains a comparison voltage and a set voltage through the anti-overshoot circuit; the output terminal of the switched capacitor is connected to the input terminal of the compensation controller Connection, the output terminal of the compensation controller is connected to the operational amplifier OVCT, and the compensation controller generates the compensation control voltage to control the operational amplifier; through the comparison between the feedback voltage and the comparison voltage, switch the set voltage to access or not access the compensation controller to solve the problems of longer start-up time and higher overshoot voltage.

Description

technical field [0001] The invention belongs to the technical field of integrated circuits, and in particular relates to an anti-overshoot circuit for a constant voltage control power supply. Background technique [0002] ICs manufactured with more advanced integrated circuit technology can effectively increase the integration of transistors and reduce the operating voltage of ICs, which brings broad development space to portable and multi-functional devices, so more and more devices use more advanced ICs manufacturing process. While advanced manufacturing technology brings many benefits, it also increases the cost of equipment and sharply reduces the withstand voltage fluctuation. Compared with the past, the design requirements for its power supply are higher. Overshoot is one of the unavoidable problems in power supply design, which is very likely to cause equipment damage in the early stage of startup, reducing equipment safety and service life. [0003] At present, the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M1/32H02M1/36
CPCH02M1/32H02M1/36
Inventor 吴强李勋唐波许刚颖
Owner 成都启臣微电子股份有限公司
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