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Boosted circuit

A booster circuit and circuit technology, applied in electrical components, adjusting electrical variables, instruments, etc., to achieve the effects of low cost, convenient use and low power consumption

Active Publication Date: 2013-05-01
MORNSUN GUANGZHOU SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] So far, there has not been a low-cost, low-loss boost circuit to drive MOS tubes at home and abroad.

Method used

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Examples

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no. 1 example

[0050] Figure 4 It is a functional block diagram of a booster circuit of the present invention, which is completely drawn according to the technical scheme, Figure 5 It is the schematic diagram of the first embodiment of the present invention, and its connection relationship fully complies with the connection relationship in the technical solution, as follows:

[0051] A boost circuit, see Figure 5 , comprising a surge suppression circuit 20, the dashed line box 20 is a surge suppression circuit, a linear voltage regulator circuit 30, an oscillator circuit 40, a voltage doubler rectifier circuit 50; the surge suppression circuit 20 includes three ports, and the surge suppression input Terminal 21, surge suppression output terminal 23, surge suppression ground terminal 22; linear voltage regulator circuit 30 includes three ports, linear voltage regulator input terminal 31, linear voltage regulator output terminal 33, linear voltage regulator ground terminal 32; oscillator ...

no. 1 example

[0057] The following is the working principle of the first embodiment:

[0058] The purpose of the present invention is to protect the auxiliary power supply in the circuit, so a primary surge suppression circuit 20 is provided to ensure that the linear voltage regulator circuit 30 is not damaged. Since the operating current of the subsequent oscillator circuit 40 is below 2mA, the reason The current limit of 2mA is selected because in the industrial field, the voltage of the DC bus is mostly 48V, and the power consumption limit of 100mW requires the operating current to be less than 100mW / 48V=2.083mA. Considering that the linear voltage regulator circuit 30 will also consume some current, Therefore, the operating current of the oscillator circuit 40 is required to be below 2mA to ensure that the total power consumption of the present invention is below 100mW.

[0059] The quiescent current requirement of the linear regulator circuit 30 is less than 100uA, that is, when there ...

no. 2 example

[0075] Figure 4 It is a functional block diagram of a booster circuit of the present invention, which is completely drawn according to the technical scheme, Figure 8 It is a schematic diagram of the second embodiment of the present invention, and its connection relationship fully complies with the connection relationship in the technical solution, see Figure 8 , including a surge suppression circuit 20, within the dotted line frame 20 is a surge suppression circuit, a linear voltage regulator circuit 30, an oscillator circuit 40, and a voltage doubler rectifier circuit 50; the connection relationship of these four unit circuits is the same as in Embodiment 1.

[0076] The surge suppression circuit 20, the linear voltage stabilizing circuit 30, and the voltage doubler rectification circuit 50 are the same as the first specific solution, except that the oscillator circuit 40 is a single-tube sinusoidal oscillator, including the fifth resistor R5 and the sixth resistor R5. R6...

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Abstract

The invention discloses a boosted circuit which is composed of four unit circuits including a surge suppression circuit, a linear voltage stabilizing circuit, an oscillator circuit and a voltage doubling rectifying circuit, wherein after power voltage is filtered and reduced by the surge suppression circuit, stable voltage is output by the linear voltage stabilizing circuit; through the oscillator circuit, a square wave or a sine wave of which a peak-to-peak value is close to the output voltage of the linear voltage stabilizing circuit is generated; and after capacitive coupling of the voltage doubling rectifying circuit is performed on the square wave or the sine wave, voltage high than the power voltage is output through voltage doubling rectification and used for driving a power MOS (Metal Oxide Semiconductor) tube. The boosted circuit is characterized in that the output voltage of the linear voltage stabilizing output end of the linear voltage stabilizing circuit is slightly greater than the driving voltage of a grid electrode of the MOS tube, and the working current of the oscillator circuit is lower than 2 mA, so as to implement boosting with no-load power consumption lower than 100 milliwatt and satisfy the energy saving requirement of the new age.

Description

technical field [0001] The invention relates to a boost circuit, in particular to a low power consumption circuit for driving a power MOS tube. Background technique [0002] Since the circuits in this application are mostly used for protection circuits, the current limiting circuit in the protection circuit will be described first. There are many kinds of current-limiting circuits or devices. The fuse invented by the American inventor Thomas Alva Edison (Thomas Alva Edison, 1847-1931) more than a hundred years ago is a current-limiting device. The fuse (fuse) is also called a current fuse. IEC127 The standard defines it as a "fuse-link". [0003] Table 1 shows the electrical characteristics of the ultra-fast-acting fuses in the prior art, which meet the certification standards of CCC in China and UL in the United States. [0004] [0005] From Table 1, we can see the characteristics of the existing technology fuse. When the current is 200% of the rated current, the fusi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/00H02M3/156H02M7/10H02M1/32
Inventor 王保均金英姬
Owner MORNSUN GUANGZHOU SCI & TECH
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