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A load adaptive constant current source device

A constant current source and self-adaptive technology, which is applied in the direction of instruments, control/regulation systems, and adjustment of electrical variables, etc. It can solve problems such as load or instrument damage, output current exceeding the limit current, and no over-current power-off protection.

Inactive Publication Date: 2020-08-11
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, there is no over-current power-off protection function in the technical solution disclosed in the above-mentioned patent. Once the current-limiting module fails, it will cause the risk that the output current will exceed the limited current (generally the maximum safe current), resulting in damage to the load or the instrument.

Method used

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  • A load adaptive constant current source device
  • A load adaptive constant current source device
  • A load adaptive constant current source device

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Embodiment 1 Overall structure of the present invention

[0039] Overall structure of the present invention is as figure 1 As shown, there are current setting module 1, limiting setting module 2, power output module 3, load judging module 4, delay compensation module 5, voltage tracking module 6, overcurrent judging module 7, power-off protection module 8, display driver Module 9, reference voltage module 10, power management module 11, and front panel 12; wherein, the current setting module 1 is connected to the limiter setting module 2, and the limiter setting module 2 is also connected to the power output module 3 and the display driver module 9 respectively, The power output module 3 is connected to the display drive module 9, the load judgment module 4, and the overcurrent judgment module 7 respectively, the reference voltage module 10 is connected to the load judgment module 4, the load judgment module 4 is connected to the delay compensation module 5, and the del...

Embodiment 2

[0040] Embodiment 2 The current setting module of the present invention

[0041] The current setting module 1 of the present invention belongs to the prior art, and can be conventionally designed according to actual needs, and can also adopt such as image 3 In the structure shown, one end of the resistor R37 is connected to the power supply Vdd, the other end is connected to the cathode of the Zener diode D2 and a fixed end of the sliding rheostat W5, the anode of the Zener diode D2 is grounded, the other fixed end of the sliding rheostat W5 is grounded, and the resistor One end of R38 is connected to the sliding wire end of the sliding rheostat W5, the other end is connected to the non-inverting input end of the operational amplifier U10B, the inverting input end of the operational amplifier U10B is connected to one end of the resistor R39, and the other end of the resistor R39 is connected to the output end of the operational amplifier U10B. And as the output terminal of th...

Embodiment 3

[0043] Embodiment 3 Limit setting module of the present invention

[0044] Limiter setting module 2 of the present invention belongs to the prior art, and can be conventionally designed according to actual needs, and can also adopt the structure provided by this embodiment, such as Figure 4 As shown, one end of the resistor R42 is used as the input end of the limiter setting module 2, which is recorded as port CL-in, and the other end is connected to the non-inverting input end of the operational amplifier U11B and the positive pole of the diode D3, and the negative pole of the diode D3 is connected to the output of the operational amplifier U10A end and one end of the resistor R41, the other end of the resistor R41 is connected to the inverting input end of the operational amplifier U10A, the non-inverting input end of the operational amplifier U10A is connected to one end of the resistor R40, and the other end of the resistor R40 is connected to the sliding end of the slidin...

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Abstract

The invention discloses a load adaptive constant current source device, which belongs to the technical filed of electronic devices. The main structure of the load adaptive constant current source device comprises a current setting module (1), an amplitude limiting setting module (2), a power output module (3), a load judgment module (4), a delay compensation module (5), a voltage tracking module (6) and a power-off protection module (8), etc. The load adaptive constant current source device can actively adapt to the change of the load during work, and has the advantages of high efficiency, wide load adaptation range, high safety and high reliability.

Description

technical field [0001] The invention belongs to the technical field of electronic equipment. In particular, it relates to a load adaptive constant current source device. Background technique [0002] Constant current sources have important applications in many fields such as LED drive, laser drive, sensor drive, and various glow discharge light source drives. The basic principle of the constant current source circuit is generally to use the nonlinear characteristics of the triode or FET and the deep negative feedback technology to make the output current controlled by the control voltage, and keep the current flowing through the load constant when the load changes. In the constant current source circuit, the stability of the current and the efficiency of the circuit are two crucial parameters. [0003] The existing technology closest to the present invention is the Chinese patent "a double-loop feedback constant current source circuit" (application number: 201511008766.5) ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05F1/56
CPCG05F1/56
Inventor 汝玉星孙茂强毕琳旭于广安杨忠岗
Owner JILIN UNIV