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A load adaptive constant current source module

A constant current source module, self-adaptive technology, applied in instruments, control/regulating systems, regulating electrical variables, etc., can solve problems such as output current exceeding the limit current, damage to the load or instrument, and no over-current and power-off protection.

Inactive Publication Date: 2020-10-20
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 module
  • A load adaptive constant current source module
  • A load adaptive constant current source module

Examples

Experimental program
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Effect test

Embodiment 1

[0036] Embodiment 1 Overall structure of the present invention

[0037] Overall structure of the present invention is as figure 1 As shown, the structure includes front panel 1, limiter 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; limit setting module 2 is connected with power output module 3, power output module 3 is connected with display drive module 9, load judgment module 4, overcurrent judgment module 7 respectively, reference voltage module 10 is connected with load judgment module The modules 4 are connected, the load judgment module 4 is connected with the delay compensation module 5, the delay compensation module 5 is connected with the voltage tracking module 6, the voltage tracking module 6 is connected with the power output module 3, the overcurrent judgment module 7 is connect...

Embodiment 2

[0038] Embodiment 2 Front panel of the present invention

[0039] Front panel structure of the present invention such as figure 2 As shown, the structure of the front panel 1 includes: a 9-pin D-shaped interface 101 and a reset button 102; the pin connection relationship of the 9-pin D-shaped interface 101 is as follows image 3 As shown, pin 1 is grounded, pin 6 is connected to power supply Vcc / 2, pin 2 is connected to power supply Vcc, pin 7 is connected to power supply Vdd, pin 3 and pin 8 are respectively connected to port PWR-out3 and port PWR-out2 of power output module 3, Pin 4 is connected to the port DIS-out of the display driver module 9, and pins 9 and 5 are respectively connected to the port L_set and the port I_set of the limiter setting module 2.

[0040] Among them, the 9-pin D-shaped interface 101 facilitates the integrated connection between the present invention and other equipment, and when connected with other equipment, the external equipment provides th...

Embodiment 3

[0041] Embodiment 3 Limit setting module of the present invention

[0042] 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 R39 is used as an input end of the limiter setting module 2, which is recorded as the port I_set, connected to pin 5 of the 9-pin D-shaped interface 101 on the front panel 1, and the other end of the resistor R39 is connected to the non-inverting input of the operational amplifier U10B terminal and the positive pole of diode D2, the negative pole of diode D2 is connected to the output terminal of operational amplifier U10A and one end of resistor R38, the other end of resistor R38 is connected to the inverting input terminal of operational amplifier U11A, the non-inverting input terminal of operational amplifier U10A is connected to one end of resistor R37 ...

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Abstract

The invention relates to a load adaptive constant current source module, and belongs to the technical field of electronic equipment. The module mainly includes the structures of a front panel (1), anamplitude limiting setting module (2), a power output module (3), a load judging module (4), a delay compensation module (5), a voltage tracking module (6), an overcurrent judging module (7), a powerfailure protection module (8) and the like. The module can actively adapt to the load change 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. It particularly relates to a load adaptive constant current source module. 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 Portable Dual-loop Feedback Constant Current Source Module" (application number: 201511008875...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05F1/573
CPCG05F1/573
Inventor 高博郑浩马春阳汝玉星吴戈霍佳雨王添顺池伟金玳冉
Owner JILIN UNIV
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