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Boost circuit

A technology of boosting circuit and clamping circuit, which is applied in the direction of electrical components, adjusting electric variables, instruments, etc., and can solve the problem of diode D2 and transistor M2 burning out, etc.

Pending Publication Date: 2021-12-07
DELTA ELECTRONICS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the initial state, there is no voltage on the flying capacitor C1, so the diode D2 and the transistor M2 will withstand the entire input voltage, which may cause the diode D2 and the transistor M2 to burn out instantly

Method used

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Embodiment Construction

[0050] The terms "first", "second" and the like used herein do not specifically refer to a sequence or sequence, but are only used to distinguish elements or operations described with the same technical terms. In addition, as used herein, "electrically connected" may mean that two elements are directly or indirectly connected. That is to say, when it is described that "the first element is electrically connected to the second element", other electronic elements may be disposed between the first element and the second element.

[0051] figure 2 is a schematic circuit diagram illustrating a boost circuit according to an embodiment. Please refer to the figure, the step-up circuit 200 is used for the first DC voltage source DC1 and the load 210, the load 210 can be a DC-AC converter or any other suitable load, the first DC voltage source DC1 can be a battery, a capacitor or Any device that can provide voltage, such as a solar power generation device, is not limited to whether i...

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PUM

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Abstract

The invention provides a booster circuit which is used for a direct-current voltage source and a load. The boost circuit comprises an inductor, four switch elements, a flying capacitor and a clamping circuit. The clamping circuit is electrically connected to one end of the flying capacitor and the voltage cathode of the DC voltage source, and comprises a clamping element and an amplifier. When the potential at the end of the flying capacitor is greater than a critical value, the clamping element is conducted and enables the amplifier, so that the charging current of the flying capacitor flows through the amplifier.

Description

technical field [0001] The present disclosure relates to a boost circuit, which improves the topology of a conventional flying capacitor converter (FCC). Background technique [0002] figure 1 is a circuit diagram showing a flying capacitor converter according to the prior art. Please refer to figure 1 , the existing flying capacitor converter includes an inductor L, a transistor M1, a transistor M2, a diode D1, a diode D2, a flying capacitor C1, and capacitors C2 and C3. This flying capacitor converter is used to output the DC voltage source DC The DC voltage is boosted and output to the DC-AC converter 110 . The advantage of this circuit is that the transistor M1 and the transistor M2 are connected in series, so it has a voltage dividing effect, so that the transistor M1 and the transistor M2 with lower withstand voltage can be used. However, in the initial state, there is no voltage on the flying capacitor C1, so the diode D2 and the transistor M2 will withstand the e...

Claims

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Application Information

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IPC IPC(8): H02M3/158H02M1/32
CPCH02M3/158H02M1/32
Inventor 黄文育林信晃
Owner DELTA ELECTRONICS INC