Detection circuit and electronic device using same
A technology for detecting circuits and circuits, applied in the field of circuits
Active Publication Date: 2018-07-24
SHANGHAI AWINIC TECH CO LTD
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Problems solved by technology
[0003] Therefore, it is urgent to provide a technical solution to effectively solve the problem of how to ensure that the driving voltage will not cause the breakdown of the power DNMOS tube
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[0013] Implementing any technical solution of the embodiments of the present application does not necessarily need to achieve all the above advantages at the same time.
[0014] In order to enable those skilled in the art to better understand the technical solutions in the embodiments of the present application, the following will clearly and completely describe the technical solutions in the embodiments of the present application in conjunction with the drawings in the embodiments of the present application. Obviously, the described The embodiments are only some of the embodiments of the present application, but not all of them. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the embodiments of the present application shall fall within the protection scope of the embodiments of the present application.
[0015] The specific implementation of the embodiment of the present application will be further described below in conjunct...
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The embodiment of the present application relates to a detection circuit and an electronic device using the same, wherein the detection circuit includes a fourth branch, a fifth branch, and a third energy storage unit; the fourth branch includes a plurality of fourth switching devices; the fifth branch includes a plurality of fifth switching devices; the fourth branch is configured to sample a preset electrical signal threshold to the third energy storage unit by the switching cooperation of the plurality of fourth switching devices; the fifth branch is configured to sample a voltage difference between the detecting ends of the first energy storage unit to the third energy storage unit by the switching cooperation of the plurality of fifth switching devices in order to compare the voltagedifference between the detecting ends and the preset electrical signal threshold, so that the relationship between the voltage difference between the detecting ends and the preset electrical signal threshold can be accurately determined. Thus, by the preset electrical signal threshold, it can be guaranteed that the drive voltage of a drive signal does not cause the power DNMOS transisitor to breakdown.
Description
technical field [0001] The embodiments of the present application relate to the field of circuit technology, and in particular, to a detection circuit and an electronic device using the detection circuit. Background technique [0002] In order to reduce the area and cost of the power chip without sacrificing the driving ability, there is a way to select the power transistor with the smallest possible size under the premise of the same on-resistance, and for this purpose, it is necessary to provide a higher The power supply voltage can make the power tube with smaller size turn on. For example, if the traditional power chip includes a power PMOS transistor, under the premise of having the same on-resistance, the size of the power NMOS transistor is much smaller, especially in more and more product applications that require class D power amplifiers and motors. When driving equal-power chips to achieve high voltage, large driving capability and lower cost, in the high-voltage ...
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IPC IPC(8): H02H7/22H02M3/07
CPCH02H7/222H02M3/07G01R19/10G01R31/40G01R19/16519G01R19/16576G01R19/2509H02J7/345H02J7/00302
Inventor 杨志飞张海军姚炜周佳宁杜黎明
Owner SHANGHAI AWINIC TECH CO LTD