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Power deviation detecting device

A technology of deviation detection and power, which is applied in the field of detection devices for the deviation between actual power and standard power

Inactive Publication Date: 2015-03-25
SCIENBIZIP CONSULTINGSHENZHENCO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no detection device that can automatically detect the power deviation of the transistor to judge the working performance of the transistor.

Method used

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Embodiment Construction

[0017] see figure 1 , the power deviation detection device 10 according to the preferred embodiment of the present invention is used to detect the deviation value of the actual power of a transistor relative to the standard power. The power deviation detection device 10 includes a current sampler 11 , a voltage sampler 12 , an oscilloscope 13 , a memory 14 , a processor 15 , a display 16 and an electronic load 17 . The electronic load 17 is electrically connected to the transistor for making the transistor work in an amplification region.

[0018] see figure 2 , in this embodiment, the present invention will be described by taking the transistor to be detected as MOSFET M1 as an example. MOSFET M1 is used in a power supply circuit 20 . The power supply circuit 20 includes a pulse width modulation (Pulse width Modulation, PWM) controller 21 , a MOSFET M1 , a MOSFET M2 , an inductor L and a capacitor C. The gates g1 and g2 of MOSFET M1 and MOSFET M2 are both electrically co...

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Abstract

A power deviation detecting device comprises a current sampler, a voltage sampler, an oscilloscope, a memorizer and a processor. The oscilloscope is used for obtaining the actual working current value, the actual working voltage value and the actual duration time during the maximum output power of a transistor. A safety operation area graph is stored in the memorizer and comprises a plurality of power curves under the specific duration time. The processor is used for finding a corresponding power curve from the safety operation area graph according to the actual duration time and finding a corresponding standard working current value according to the actual working voltage value and the found power curve. The processor calculates the power deviation of the transistor according to the actual duration time, and the specific duration time, the actual working current value and the standard working current value corresponding to the found power curve. The power deviation detecting device can automatically detect the power deviation of the transistor.

Description

technical field [0001] The invention relates to a power deviation detection device, in particular to a detection device for detecting the deviation between the actual power and the standard power of a transistor. Background technique [0002] Transistors such as Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET) and Bipolar Junction Transistor (BJT) are widely used switching transistors. For example, MOSFETs are used as switch tubes in power circuits, such as Buck circuits. The working performance of the MOSFET directly affects the working performance of the Buck circuit. In the MOSFET product specification (datasheet), a MOSFET safe operating area (Sage Operating Area, SOA) chart is generally provided to characterize the safe operating area defined by parameters such as current, voltage, and power. The user judges the working performance of the transistor by manually checking the safe working chart. However, there is no detection device that can automatically det...

Claims

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Application Information

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IPC IPC(8): G01R21/06
Inventor 白云童松林
Owner SCIENBIZIP CONSULTINGSHENZHENCO