CN208607548U - Constant-current source output control system and regulated power supply - Google Patents
Constant-current source output control system and regulated power supply Download PDFInfo
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- CN208607548U CN208607548U CN201920156923.4U CN201920156923U CN208607548U CN 208607548 U CN208607548 U CN 208607548U CN 201920156923 U CN201920156923 U CN 201920156923U CN 208607548 U CN208607548 U CN 208607548U
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- constant
- current
- circuit
- output control
- voltage
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Abstract
The utility model relates to a kind of constant-current source output control system and regulated power supplies, and wherein this constant-current source output control system includes: adjustable voltage input module, and the constant current output control module being electrical connected with the adjustable voltage input module；Wherein the adjustable voltage input module includes: adjustable voltage input circuit；After the adjustable voltage input circuit is adjusted supply voltage by a reference voltage source chip, to obtain input voltage；The constant current output control module is suitable for carrying out constant flow regulation to the input voltage, to export constant current；The utility model carries out constant current output by the input voltage to adjustable extent, realizes the function of the adjustable constant current driving of high stability, high-precision, output area.
Description
Technical field
The utility model relates to a kind of power circuit field more particularly to a kind of constant-current source output control system and pressure stabilizing electricity
Source.
Background technique
Many devices are worked using constant current drive mode now, and electric current long-term stability is usually as measurement constant-current supply
Performance indicator, but conventional power source circuit there are transient current spikes, beyond the driving current of permission the problems such as.
Therefore, need to develop a kind of constant-current source output control system and regulated power supply, to solve the above problems.
Utility model content
The purpose of the utility model is to provide a kind of constant-current source output control system and regulated power supplies, to solve how to obtain
Input voltage carries out the problem of constant current output.
In order to solve the above-mentioned technical problem, the utility model provides a kind of constant-current source output control system comprising: it can
Adjust voltage input module, and the constant current output control module being electrical connected with the adjustable voltage input module；It is wherein described
Adjustable voltage input module includes: adjustable voltage input circuit；The adjustable voltage input circuit passes through a reference voltage source core
After supply voltage is adjusted in piece, to obtain input voltage；The constant current output control module is suitable for the input voltage
Constant flow regulation is carried out, to export constant current.
Further, the adjustable voltage input module includes: to open slowly with what the adjustable voltage input circuit was electrical connected
Dynamic circuit；The slow start circuit is suitable for controlling the delay time that the input voltage reaches preset value.
Further, the constant current output control module includes: the current constant control electricity for being provided with operational amplifier, field-effect tube
Road；After the constant-current control circuit carries out amplifier to input voltage by the operational amplifier, exported by the field-effect tube
Constant current.
Further, the constant current output control module includes: the start-up and shut-down control being electrical connected with the constant-current control circuit
Circuit；The starting or stopping control circuit is suitable for controlling the constant-current control circuit and carries out open circuit.
Further, the constant current output control module further include: the voltage being electrical connected with the constant-current control circuit is adopted
Sample circuit, current foldback circuit；When the collected input voltage of the voltage sampling circuit is higher than preset value, the overcurrent is protected
Protection circuit is suitable for shunting the constant-current control circuit.
Another aspect, the utility model additionally provide a kind of regulated power supply, and the regulated power supply is equipped with above-mentioned constant-current source
Output control system.
The utility model has the beneficial effects that the utility model is defeated by the input voltage progress constant current to adjustable extent
Out, the function of the adjustable constant current driving of high stability, high-precision, output area is realized.
Detailed description of the invention
The present invention will be further described with reference to the accompanying drawings and examples.
Fig. 1 is the functional block diagram of the utility model constant-current source output control system；
Fig. 2 is the circuit diagram of the utility model adjustable voltage input circuit；
Fig. 3 is the circuit diagram of the utility model constant-current control circuit.
In figure: operational amplifier U1, field-effect tube M1.
Specific embodiment
The utility model is described in further detail presently in connection with attached drawing.These attached drawings are simplified schematic diagram,
Only illustrate the basic structure of the utility model in a schematic way, therefore it only shows composition related with the utility model.
Fig. 1 is the functional block diagram of the utility model constant-current source output control system；
Fig. 2 is the circuit diagram of the utility model adjustable voltage input circuit.
In the present embodiment, as shown in Figure 1 and Figure 2, a kind of constant-current source output control system is present embodiments provided, is wrapped
It includes: adjustable voltage input module, and the constant current output control module being electrical connected with the adjustable voltage input module；Wherein
The adjustable voltage input module includes: adjustable voltage input circuit；The adjustable voltage input circuit passes through a reference voltage
After supply voltage is adjusted in source chip (using ADR01 type reference voltage source chip in the present embodiment), to be inputted
Voltage；The constant current output control module is suitable for carrying out constant flow regulation to the input voltage, to export constant current.
In the present embodiment, the present embodiment carries out constant current output by the input voltage to adjustable extent, realizes high steady
The function of the adjustable constant current driving of qualitative, high-precision, output area.
In the present embodiment, as shown in Fig. 2, by reference voltage source chip (in the present embodiment using ADR01 type benchmark electricity
Potential source chip) reference voltage of output obtains stablizing adjustable input voltage through reversed and voltage division processing, and resistance is all made of in Fig. 2
Low noise and Low Drift Temperature resistance, and filter capacitor is increased respectively at the input, output end of reverser U2 and electric resistance partial pressure.
In order to avoid because circuit opens moment when a large amount of capacitors presence can generate in circuit biggish surge current with
Seriously affect circuit safety, the adjustable voltage input module include: be electrical connected with the adjustable voltage input circuit it is slow
Start-up circuit；The slow start circuit is suitable for controlling the delay time that the input voltage reaches preset value.
In the present embodiment, a slow turn-on chip (using LM317 chip in the present embodiment) is equipped in slow start circuit
To control the delay time that the input voltage reaches preset value.
Fig. 3 is the circuit diagram of the utility model constant-current control circuit.
In order to export constant current, as shown in figure 3, the constant current output control module includes: to be provided with operational amplifier
U1(uses OPA227 type operational amplifier in the present embodiment), field-effect tube M1(use IRF540N type field in the present embodiment
Effect pipe) constant-current control circuit；The constant-current control circuit carries out amplifier to input voltage by the operational amplifier U1
Afterwards, constant current is exported by the field-effect tube M1.
In the present embodiment, as shown in figure 3, VDDFor power supply, VrFor input voltage, R5For current-limiting resistance, R0For electric current
Sampling resistor, I0To flow through sampling resistor R0Electric current, field-effect tube M1 exported using source electrode, and when normal work (exports constant
When electric current), it is high level, triode Q at control signal input (end K)1Cut-off, I0For constant current；When control signal input
Holding (end K) is low level, triode Q1Conducting drags down field-effect tube M1 grid voltage, with the output of control circuit no current.
In order to control the on-off of constant-current control circuit, the constant current output control module includes: and the current constant control electricity
The starting or stopping control circuit that road is electrical connected；The starting or stopping control circuit is suitable for controlling the constant-current control circuit and carries out open circuit.
In the present embodiment, starting or stopping control circuit is using NE555 chip as the control circuit of core.
In order to realize electric current constant output and protect circuit, the constant current output control module further include: with the constant current
Voltage sampling circuit that control circuit is electrical connected, current foldback circuit；When the collected input electricity of the voltage sampling circuit
When pressure is higher than preset value, the current foldback circuit is suitable for shunting the constant-current control circuit.
In the present embodiment, current foldback circuit is provided with a driving relay, when the control driving actuating of relay
When, that is, complete the shunting to the constant-current control circuit.
On the basis of above-mentioned constant-current source output control system, the utility model additionally provides a kind of regulated power supply, i.e. institute
It states regulated power supply and above-mentioned constant-current source output control system is installed.
In conclusion the utility model carries out constant current output by the input voltage to adjustable extent, high stable is realized
Property, the adjustable constant current driving of high-precision, output area function；By slow start circuit, avoid opening because of circuit big when moment
The presence of amount capacitor can generate biggish surge current in circuit to seriously affect circuit safety.
It is enlightenment, through the above description, related work people with the above-mentioned desirable embodiment according to the utility model
Member can carry out various changes and amendments in the range of without departing from this item utility model technical idea completely.This item is real
It is not limited to the contents of the specification with novel technical scope, it is necessary to its technology is determined according to scope of the claims
Property range.
Claims (6)
1. a kind of constant-current source output control system characterized by comprising
Adjustable voltage input module, and the constant current output control module being electrical connected with the adjustable voltage input module；Its
In
The adjustable voltage input module includes: adjustable voltage input circuit；
After the adjustable voltage input circuit is adjusted supply voltage by a reference voltage source chip, to obtain input electricity
Pressure；
The constant current output control module is suitable for carrying out constant flow regulation to the input voltage, to export constant current.
2. constant-current source output control system as described in claim 1, which is characterized in that
The adjustable voltage input module includes: the slow start circuit being electrical connected with the adjustable voltage input circuit；
The slow start circuit is suitable for controlling the delay time that the input voltage reaches preset value.
3. constant-current source output control system as described in claim 1, which is characterized in that
The constant current output control module includes: the constant-current control circuit for being provided with operational amplifier, field-effect tube；
After the constant-current control circuit carries out amplifier to input voltage by the operational amplifier, exported by the field-effect tube
Constant current.
4. constant-current source output control system as claimed in claim 3, which is characterized in that
The constant current output control module includes: the starting or stopping control circuit being electrical connected with the constant-current control circuit；
The starting or stopping control circuit is suitable for controlling the constant-current control circuit and carries out open circuit.
5. constant-current source output control system as claimed in claim 3, which is characterized in that
The constant current output control module further include: the voltage sampling circuit that is electrical connected with the constant-current control circuit, overcurrent
Protect circuit；
When the collected input voltage of the voltage sampling circuit is higher than preset value, the current foldback circuit is suitable for described
Constant-current control circuit is shunted.
6. a kind of regulated power supply, which is characterized in that the regulated power supply is equipped with constant current as described in any one in claim 1-5
Source output control system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920156923.4U CN208607548U (en) | 2019-01-30 | 2019-01-30 | Constant-current source output control system and regulated power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920156923.4U CN208607548U (en) | 2019-01-30 | 2019-01-30 | Constant-current source output control system and regulated power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208607548U true CN208607548U (en) | 2019-03-15 |
Family
ID=65681199
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920156923.4U Expired - Fee Related CN208607548U (en) | 2019-01-30 | 2019-01-30 | Constant-current source output control system and regulated power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208607548U (en) |
-
2019
- 2019-01-30 CN CN201920156923.4U patent/CN208607548U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190315 Termination date: 20200130 |