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Live no-load prevention semiconductor detection power supply device

A power supply device, semiconductor technology, applied in the direction of measuring device, circuit device, DC network circuit device, etc., can solve the problems of poor power supply stability of semiconductor components, easy to cause short circuit, small space for load access, etc., to eliminate related problems Hidden dangers, wide application range, and timely response effects

Active Publication Date: 2021-09-24
陕西开尔文测控技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although at the current technical level, mass production of power management chips can greatly reduce the production cost of the chip, but as far as the chip itself is concerned, it is still necessary to add an additional layer structure, such as NBL (N-type buried layer, N-type hidden layer )
In addition, the power management chip is an active device, its performance is affected by its own working heat to a certain extent, and the stability of power supply to semiconductor components is not good.
[0003] For the power supply during the semiconductor detection process, usually the power management chip is connected to the access terminal of the load (semiconductor element). Although the load is usually connected and then powered on, when the load is actually removed, if the power supply device is In the power-on state, the load access terminal will be charged, and it will be in a charged and no-load state, and the space reserved for load access is very small, which is likely to cause a short circuit

Method used

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  • Live no-load prevention semiconductor detection power supply device
  • Live no-load prevention semiconductor detection power supply device
  • Live no-load prevention semiconductor detection power supply device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] The semiconductor detection power supply device for anti-charged no-load includes a step-down circuit, a first switch circuit, an energy storage circuit, a relay, a load access circuit, a second switch circuit and a third switch circuit.

[0042] The step-down circuit, the first switch circuit and the energy storage circuit are connected in sequence, wherein the step-down circuit is respectively connected to the control terminal and the input terminal of the first switch circuit, and the output terminal of the first switch circuit is connected to the energy storage circuit. The energy storage circuit, the load access circuit, and the second switch circuit are respectively connected to the relay contacts of the relay, wherein the energy storage circuit is connected to the normally open contact, the control terminal of the second switch circuit is connected to the normally closed contact, and the load access circuit is connected to the switch contacts. The second switch c...

Embodiment 2

[0048] This embodiment discloses a circuit structure of the step-down circuit in Embodiment 1 by taking the output of two low-voltage signals as an example.

[0049] Such as figure 2 As shown, the step-down circuit is composed of a current generating unit, a current equivalent unit, a first-stage step-down unit, a second-stage step-down unit, and a third-stage step-down unit. The second-stage step-down unit and the third-stage step-down unit are the secondary Step-down unit, the number of secondary step-down units determines the number of channels for outputting low-voltage signals.

[0050] The current generating unit is connected to the high voltage Vcc to generate the starting current. Among them, the first-level step-down unit is formed by cascading the first-level step-down module to N-level step-down module, N is a positive integer greater than 3, the first-level step-down unit is connected to the high voltage Vcc, and the current generation units are respectively one ...

Embodiment 3

[0062] This embodiment discloses an implementation structure of the second switch circuit in the first embodiment.

[0063] Such as Figure 4 As shown, the second switch circuit includes an optocoupler U1, a second capacitor C2, and a sixth resistor R6. One end of the sixth resistor R6 is connected to the output end of the light receiver D3 of the optocoupler U1, and the other end of the sixth resistor R6 is grounded. The electrical signal output by the coupler U1 is loaded on the sixth resistor R6 to generate a voltage signal. The second capacitor C2 is connected in parallel to both ends of the sixth resistor R6. Since the light receiver D3 outputs current under the action of the light emitter D2, the voltage is unstable. The function of the second capacitor C2 is to load the sixth resistor R6 The voltage signal on the filter is filtered to stabilize the voltage signal.

[0064] Loading the filtered voltage signal to the control terminal of the third switch circuit achieves...

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Abstract

The invention discloses a live no-load prevention semiconductor detection power supply device. A step-down circuit is connected with the control end and the input end of a first switching circuit. The output end of the first switching circuit is connected with an energy storage circuit. The energy storage circuit is connected with a normally open contact of a relay, a load access circuit is connected with a switch contact of the relay, and a control end of the second switch circuit is connected with a normally closed contact of the relay; the input end of the second switch circuit is connected with the step-down circuit, and the output end of the second switch circuit is connected with the control end of a third switch circuit; the input end of the third switch circuit is connected with the step-down circuit, and the output end is connected with a relay coil of the relay. The step-down circuit comprises a current generation unit, a current equivalent unit, a primary step-down unit and at least one group of secondary step-down units, wherein the primary step-down unit and each secondary step-down unit respectively comprise a multi-stage voltage drop module. And the second switch circuit adopts an optical coupler. The device can realize no load and no voltage, and can flexibly configure the voltage drop amplitude and the number of low-voltage signal paths.

Description

technical field [0001] The invention relates to the field of power management, in particular to a power supply device for preventing no-load from being connected to electricity in semiconductor testing equipment. Background technique [0002] In semiconductor (component) detection, since the withstand voltage of semiconductor components is very limited, usually not more than 5V, it is usually necessary to use a power management chip with complex peripheral circuits to realize the voltage drop of the input high voltage Vcc, and convert the high voltage Vcc Buck to low voltage signal. Although at the current technical level, mass production of power management chips can greatly reduce the production cost of the chip, but as far as the chip itself is concerned, it is still necessary to add an additional layer structure, such as NBL (N-type buried layer, N-type hidden layer ). In addition, the power management chip is an active device, its performance is affected to a certain ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J1/00H02M3/158H02M1/34H02H11/00G01R1/02
CPCH02J1/00H02M3/158H02M1/34H02H11/00G01R1/02
Inventor 杜浩晨
Owner 陕西开尔文测控技术有限公司