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DC-to-DC converting circuit and DC-to-DC controller integrated circuit

A DC-to-DC and integrated circuit technology, which is applied in the direction of DC power input conversion to DC power output, control/regulation system, output power conversion device, etc., can solve the problem of low detection accuracy and the inability to effectively improve DC to DC Convert circuit detection accuracy and other issues to achieve the effect of improving detection accuracy

Inactive Publication Date: 2018-06-29
UPI SEMICON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the component that generates the most heat in the DC-to-DC conversion circuit is the power switch, so the detection accuracy of the existing DC-to-DC conversion circuit is often not high, so it is impossible to avoid the phenomenon of overheating and burning
In addition, although some existing DC-to-DC conversion circuits have a sensing element in the power switch, the sensing element can only be installed in the low-side switch, and can only operate normally when the low-side switch is turned on, so it cannot be effectively Greatly improve the detection accuracy of the DC-to-DC conversion circuit

Method used

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  • DC-to-DC converting circuit and DC-to-DC controller integrated circuit
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  • DC-to-DC converting circuit and DC-to-DC controller integrated circuit

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Embodiment Construction

[0070] figure 1 is a schematic diagram of a DC-DC conversion circuit according to an embodiment of the present invention. Such as figure 1 As shown, the DC-to-DC conversion circuit 100 receives an input voltage VIN, and the DC-to-DC conversion circuit 100 includes an integrated circuit 20 of a DC-to-DC controller, a power switch unit 110, a second power switch 120, a bootstrap capacitor 131 and an impedance circuit 160 , there is a phase node N1 between the power switch unit 110 and the second power switch 120 .

[0071] The power switch unit 110 includes a first power switch 111 , a sensing element 112 , a first terminal 101 , a second terminal 102 , a sensing terminal 103 and a third terminal 104 . In one embodiment, the sensing element 112 is a temperature sensor.

[0072]In this embodiment, the power switch unit 110 and the second power switch 120 are an integrated circuit, and the first power switch 111 and the sensing element 112 are metal oxide semiconductor transist...

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PUM

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Abstract

A DC-to-DC converting circuit and DC-to-DC controller integrated circuit includes a power switch unit, a second power switch, a phase node, a boosted circuit and a sensing circuit. The power switch unit includes a first power switch, a sensing element, a first end, a second end and a sensing end. The sensing element is connected to the sensing end and the first end. The first end is connected to an input voltage. The second power switch is connected to the first power switch. The phase node is located between the power switch unit and the second power switch and is connected to the second end.The boosted circuit boosts the input voltage to a first operation voltage and provides the first operation voltage to the sensing end. The first operation voltage is higher than the input voltage. The sensing circuit is connected to the boosted circuit and the sensing end to obtain a sensing voltage. The detection accuracy of the DC-to-DC converting circuit and DC-to-DC controller integrated circuit can be improved.

Description

technical field [0001] The present invention relates to a power conversion technology, and in particular to an integrated circuit of a DC-DC conversion circuit and a DC-DC controller. Background technique [0002] The DC-to-DC conversion circuit (DC-to-DC conversion circuit) can control the power switch (that is, the upper bridge switch and the lower bridge switch) through the DC-to-DC controller (DC-to-DC controller) to convert the input voltage into an output Voltage. In addition, in the existing DC-to-DC conversion circuit, a sensing element is often provided in the DC-to-DC controller, so as to achieve over-temperature protection. However, the component that generates the most heat in the DC-to-DC conversion circuit is the power switch, so the detection accuracy of the existing DC-to-DC conversion circuit is often not high, so that it is impossible to avoid the phenomenon of overheating and burning. In addition, although some existing DC-to-DC conversion circuits have ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/155H02M1/32
CPCH02M1/32H02M3/155H02M3/07H02M3/1588H02M1/0009H02M3/158H03K2217/0081H02M3/156H02M1/327
Inventor 柯圣安
Owner UPI SEMICON CORP