CN203643587U - Simple electronic load device - Google Patents
Simple electronic load device Download PDFInfo
- Publication number
- CN203643587U CN203643587U CN201320858410.0U CN201320858410U CN203643587U CN 203643587 U CN203643587 U CN 203643587U CN 201320858410 U CN201320858410 U CN 201320858410U CN 203643587 U CN203643587 U CN 203643587U
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- power
- current control
- circuit
- control circuit
- oxide
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- Control Of Voltage And Current In General (AREA)
Abstract
A simple electronic load device comprises a power source supply circuit, a current control circuit, an operational amplifier circuit, a MOS tube and a sampling resistor; the power source supply circuit is used to provide an operating voltage of the current control circuit, and the current control circuit is connected with the operational amplifier circuit; an output end of the operational amplifier circuit is connected with a grid electrode of the MOS tube and provides electric power for the grid electrode of the MOS tube; the current control circuit and the MOS tube are connected in series and then are connected between an anode and a cathode of a power source to be measured; and a source electrode of the MOS tube is connected with the sampling resistor, the sampling resistor feeds a source electrode current of the MOS tube back to the operational amplifier circuit to form negative feedback for adjusting, and the current is constant and controllable. The simple electronic load device has the advantages of the simple and reliable circuit and simple structure, the pure-impedance load enables the power factor to be 1.0, and constant-current control is guaranteed through the negative feedback; and power is large enough, and, as for a condition required for a large-power load, multiple MOS tubes of the same model can work in a parallel manner, and then the power can be increased exponentially.
Description
Technical field
The utility model relates to load device technical field, especially relates to a kind of Simple electronic load device of power supply test.
Background technology
Concerning with power supply product, the inspection before dispatching from the factory is requisite operation together.In addition, all assembled power supply in horizontal polyelectron product in the time dispatching from the factory, therefore, it is very necessary in the time of plant produced, detecting power supply.Common ground, most of electronic load is by controlling internal power MOSFET or transistorized conducting amount (being dutycycle size), consumes the equipment of electric energy by the dissipated power of power tube, it can accurately detect load voltage, accurate adjustment load current., inevitable there is the complete conducting of pipe in the conducting amount of power ratio control pipe, close completely at a section pipe sometime in a certain process, so cycle control, the electric current of load changes, and does not realize current constant, thereby can not effectively check out the performance of power supply to be measured.
Summary of the invention
The utility model object is to overcome the deficiencies in the prior art, and a kind of Simple electronic load device is provided.
For solving the problems of the technologies described above, the technical scheme that the utility model adopts is: a kind of Simple electronic load device, comprises power-supply circuit, current control circuit, discharge circuit, metal-oxide-semiconductor, sampling resistor; Described power-supply circuit is for providing the operating voltage of described current control circuit, and wherein current control circuit is connected with discharge circuit; The output terminal of described discharge circuit is connected with metal-oxide-semiconductor grid, and is the power supply of metal-oxide-semiconductor grid; Described current control circuit and metal-oxide-semiconductor are linked into after connecting between power positive cathode to be measured; Described metal-oxide-semiconductor source electrode is connected with sampling resistor, and this sampling resistor feeds back to discharge circuit formation negative feedback by metal-oxide-semiconductor source current and regulates, and realizes current constant controlled.
The utility model circuit is simple and reliable, simple structure, and it is 1.0 that pure resistive load realizes power factor, negative feedback ensures crossing current control; Be suitable for voltage wide, can accomplish wide voltage input load without electric pressure MOS by changing; Power is enough large, to requiring high power load, can pass through multiple same model MOS parallel runnings, can realize power and become multiple to increase.
Brief description of the drawings
Fig. 1 is structured flowchart of the present utility model.
Embodiment
Below by embodiment, and by reference to the accompanying drawings, the technical solution of the utility model is further described in detail.
Fig. 1 is structured flowchart of the present utility model.As shown in Figure 1, a kind of Simple electronic load device, is mainly made up of power-supply circuit, current control circuit, discharge circuit, metal-oxide-semiconductor, sampling resistor etc.Power-supply circuit is for providing the operating voltage of described current control circuit, and wherein current control circuit is connected with discharge circuit; The output terminal of discharge circuit is connected with metal-oxide-semiconductor grid, and for the power supply of metal-oxide-semiconductor grid, makes it to be operated in variable resistor district, and supply voltage loads MOS drain-source two ends completely.Current control circuit and metal-oxide-semiconductor are linked between power positive cathode to be measured after connecting.Metal-oxide-semiconductor source electrode is connected with sampling resistor, and this sampling resistor feeds back to discharge circuit formation negative feedback by metal-oxide-semiconductor source current and regulates, and realizes current constant controlled.
Above-described embodiment is only this practical new technical conceive of explanation and feature, and its object is to allow person skilled in the art can understand content of the present utility model and implement according to this, can not limit protection domain of the present utility model with this.Therefore, the utility model is not limited to embodiment disclosed and described above, also should fall in the protection domain of claim of the present utility model modifications and changes more of the present utility model.
Claims (1)
1. a Simple electronic load device, comprises power-supply circuit, current control circuit, discharge circuit, metal-oxide-semiconductor, sampling resistor; It is characterized in that, described power-supply circuit is for providing the operating voltage of described current control circuit, and wherein current control circuit is connected with discharge circuit; The output terminal of described discharge circuit is connected with metal-oxide-semiconductor grid, and is the power supply of metal-oxide-semiconductor grid; Described current control circuit and metal-oxide-semiconductor are linked into after connecting between power positive cathode to be measured; Described metal-oxide-semiconductor source electrode is connected with sampling resistor, and this sampling resistor feeds back to discharge circuit formation negative feedback by metal-oxide-semiconductor source current and regulates, and realizes current constant controlled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320858410.0U CN203643587U (en) | 2013-12-24 | 2013-12-24 | Simple electronic load device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320858410.0U CN203643587U (en) | 2013-12-24 | 2013-12-24 | Simple electronic load device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203643587U true CN203643587U (en) | 2014-06-11 |
Family
ID=50874822
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320858410.0U Expired - Fee Related CN203643587U (en) | 2013-12-24 | 2013-12-24 | Simple electronic load device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203643587U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112649672A (en) * | 2020-12-21 | 2021-04-13 | 北京大华无线电仪器有限责任公司 | Multi-module parallel electronic load |
-
2013
- 2013-12-24 CN CN201320858410.0U patent/CN203643587U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112649672A (en) * | 2020-12-21 | 2021-04-13 | 北京大华无线电仪器有限责任公司 | Multi-module parallel electronic load |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140611 Termination date: 20141224 |
|
| EXPY | Termination of patent right or utility model |