A Fast Boost Charge Pump System for Large Capacitors

A technology of boosting charge pump and capacitor, which is applied in the direction of conversion equipment without intermediate conversion to AC, can solve the problem of long voltage settling time, and achieve the effect of slow boosting speed and reducing settling time.

Active Publication Date: 2021-02-05
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to solve the shortcomings of the above-mentioned prior art, and proposes a fast step-up charge pump system suitable for large capac

Method used

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  • A Fast Boost Charge Pump System for Large Capacitors
  • A Fast Boost Charge Pump System for Large Capacitors

Examples

Experimental program
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Example Embodiment

[0019]In this embodiment, such asfigure 1 As shown, a fast boost charge pump system suitable for large capacitors includes: a control circuit, a boost charge pump and a feedback circuit;

[0020]After the control circuit receives the external signal, it generates a high-level control signal CTL_H or a low-level control signal CTL_L in the current cycle and transmits it to the boost charge pump;

[0021]If the charge pump receives the high-level control signal CTL_H, the power supply in the boost charge pump charges the flying lead capacitor Cfly and the storage capacitor Cstore;

[0022]If the charge pump receives the low-level control signal CTL_L, the flying lead capacitor Cfly and the storage capacitor Cstore in the boost charge pump charge the output capacitor Cout and generate the output voltage VOUT to the feedback circuit;

[0023]After the feedback circuit receives the output voltage VOUT, it compares with the set voltage value VREF:

[0024]If the output voltage VOUT is higher than the vo...

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Abstract

The invention discloses a quick boost charge pump system suitable for a large capacitor, which comprises a control circuit, a boost charge pump and a feedback circuit, wherein the control circuit generates a control signal transmitted to the boost charge pump after receiving an external signal; the boost charge pump receives the control signal, periodically charges and discharges a flying line capacitor, an output capacitor and a storage capacitor and generates an output voltage to the feedback circuit; and the feedback circuit compares the received output voltage with a set voltage value, andgenerates a feedback signal through a comparison result to control the work of the charge pump system. When the charge pump uses a large capacitor, the time for generating a stable output voltage isvery slow as the voltage difference between the capacitor ends is gradually reduced in the process of generating the stable voltage. Thus, the problem that the voltage establishment time of a large-capacitance charge pump is relatively long can be solved, so that a quick boost function can be realized.

Description

technical field [0001] The invention relates to semiconductor integrated circuit technology, in particular to a fast-boosting charge pump system. Background technique [0002] The charge pump structure is widely used in the design of power management systems for display screens or handheld devices. A charge pump, also known as a switched capacitor voltage converter, is a type of DC converter that uses capacitors instead of inductors or transformers to store energy. The input voltage can be raised or lowered by the charge pump, and can even be used to generate a negative voltage. It uses the internal field effect transistor (Field Effect Transistor, FET) switch array to control the transmission of charges on the capacitor in a certain way, usually clocked The signal controls the charging and discharging of the capacitor in the charge pump, so that the input voltage increases (or decreases) in a certain way to achieve the required output voltage. The basic idea of ​​the char...

Claims

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Application Information

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IPC IPC(8): H02M3/07
CPCH02M3/07
Inventor 宇跃峰尹勇生孟煦陈昕宇贾晨权磊
Owner HEFEI UNIV OF TECH
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