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Passive electronic load circuit

An electronic load and circuit technology, applied in the field of power supply testing, can solve the problems of large measurement errors and poor measurement accuracy of passive electronic loads, and achieve the effect of improving the power supply detection accuracy and avoiding test errors.

Pending Publication Date: 2020-12-29
TERMINUSBEIJING TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention proposes a passive electronic load circuit, aiming to solve the problems of large measurement error and poor measurement accuracy of passive electronic loads in the prior art

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] figure 2 A schematic circuit diagram of a passive electronic load circuit according to an embodiment of the present application is shown in .

[0034] Such as figure 2 As shown, the passive electronic load circuit of this embodiment includes a system power supply 6, a core control unit 5, an error amplifier 3, a controllable load 1, a signal converter 4, and a current sampling unit 2; the system power supply 6 and the controllable load 1 After parallel connection, the current sampling unit 2 is connected to form a branch, and the branch is connected between the positive Input+ and the negative Input- of the power supply under test.

[0035] Specifically, after the core control unit 5 is connected to the error amplifier 3 in series, it is connected to the control terminal of the controllable load 1;

[0036] After the error amplifier 3 is connected in series with the signal converter 4, it is connected to the positive terminal Input+ or the negative terminal Input- o...

Embodiment 2

[0077] The passive electronic load circuit in Embodiment 2 is a dual structure similar to the passive electronic load circuit in Embodiment 1. For details not disclosed in the passive electronic load circuit in this embodiment, please refer to the passive electronic load circuit in other embodiments. The specific implementation content of the electronic load circuit.

[0078] Figure 4 A schematic circuit diagram of a passive electronic load circuit according to another embodiment of the present application is shown in .

[0079] Such as Figure 4 As shown, the input terminal of the current sampling unit 2 is connected to the positive pole of the power supply under test Input+, the zero reference potential of the system power supply 6 and the output terminal of the controllable load 1 are connected to the negative pole of the power supply under test Input-, and the error amplifier 3 is connected to the signal converter 4. Connect the current sampling unit.

[0080] Such as ...

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PUM

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Abstract

The invention provides a passive electronic load circuit. The passive electronic load circuit comprises a system power supply, a core control unit, an error amplifier, a controllable load, a signal converter and a current sampling unit, wherein the system power supply and the controllable load are connected in parallel and then are connected with the current sampling unit to form a branch, the branch is connected between the positive electrode and the negative electrode of the tested power supply, the core control unit is connected with the control end of the controllable load after being connected with the error amplifier in series, and the error amplifier is connected in series with the signal converter and then connected with the positive electrode and the negative electrode of the tested power supply. According to the passive electronic load circuit, when the passive electronic load circuit is used for testing the power consumption of the power supply / battery, the system power supply and the controllable load are connected in parallel, the current after series connection is acquired, the power consumption of the system of the electronic load is considered, the whole power supply test error caused by lack of system power consumption is avoided, and the power supply detection precision is improved.

Description

technical field [0001] The present application belongs to the technical field of power supply testing, and in particular relates to a passive electronic load circuit. Background technique [0002] With the increasing application of IoT technology, smart terminals have higher and higher requirements for battery / power supply. How to quickly and accurately check whether a power supply / battery meets the working requirements of the Internet of Things or intelligent terminal systems has become a more important task in the development process of IoT products and factory production lines. For example, quick test of battery discharge capacity, quick test of power supply transient response and other power detection. Therefore, a simple, low-cost, and accurate power supply test equipment, that is, an electronic load, is indispensable in the development of IoT hardware and other electronic products. Especially when the production line is faced with a large number of batteries / power su...

Claims

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Application Information

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IPC IPC(8): G01R31/40
CPCG01R31/40
Inventor 陈银浩
Owner TERMINUSBEIJING TECH CO LTD