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Electric voltage stabilization method, pulse frequency modulation circuit and power supplier

A technology of pulse frequency modulation and power supply, which is applied in the field of pulse frequency modulation circuit and stable voltage, which can solve the problems of extended delivery time, difficult to estimate loss, and loss, so as to avoid power consumption, save development cost, and improve energy conversion efficiency effect

Active Publication Date: 2009-10-21
ORISE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

If the extended delivery time results in loss of business opportunities, such losses may be difficult to estimate

Method used

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  • Electric voltage stabilization method, pulse frequency modulation circuit and power supplier
  • Electric voltage stabilization method, pulse frequency modulation circuit and power supplier
  • Electric voltage stabilization method, pulse frequency modulation circuit and power supplier

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Embodiment Construction

[0028] figure 2 Shown is a circuit block diagram of a power supply according to an embodiment of the present invention. Please refer to figure 2 , the power supply 200 includes a pulse frequency modulation circuit 201 and a power converter 202 according to an embodiment of the present invention. In the pulse frequency modulation circuit 201, a comparison signal is provided inside, and the logic state of the comparison signal changes with the magnitude of the output voltage Vout. For example, when the output voltage is less than a preset voltage, the comparison signal is set to set as the first logic state. There are many ways to provide the comparison signal, such as directly detecting the output voltage or dividing the output voltage and comparing it with a reference voltage.

[0029]In addition, the pulse frequency modulation circuit 201 provides a pulse signal to the power converter 202 when the comparison signal is in the first logic state. Since the comparison signa...

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Abstract

The invention discloses a method for stabilizing voltage, a pulse frequency modulation circuit and a power supply. The method includes the following steps: firstly, a comparison signal is provided. When the voltage to be stabilized is less than a preset voltage, the comparison signal is set to a first logic state. When the comparison signal is in the first logic state, a pulse signal is provided. Within a predetermined time, the number of logic transitions of the comparison signal is calculated, and the enabling time of the pulse signal is adjusted according to the number of logic transitions. Then adjust the above-mentioned voltage according to the enabling time of the pulse signal.

Description

technical field [0001] The present invention relates to a technology in the field of power supplies, and in particular to a pulse frequency modulation circuit capable of automatically adjusting the duty cycle, a power supply using the pulse frequency modulation circuit and a method for stabilizing voltage. Background technique [0002] Power supplies are very common in our daily life. Almost all electrical products have power supplies to supply power to loads such as speakers, electric heaters, screens, light bulbs, and motors. Especially in recent years, in the field of power supplies, when the load changes, the accompanying changes in energy conversion efficiency will occur. Therefore, it is still hoped that the power supply at this time can provide High efficiency and stable power. As far as the application level is concerned, electronic products such as processors, random access memories, displays, and mobile phones will not be fully loaded at all times, especially mob...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/156H02M3/157H02M1/08G05F1/613
Inventor 黄彦霖张贵凯李明谦
Owner ORISE TECH CO LTD
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