CN205356747U - A control circuit for constant voltage power supply - Google Patents
A control circuit for constant voltage power supply Download PDFInfo
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- CN205356747U CN205356747U CN201620055746.7U CN201620055746U CN205356747U CN 205356747 U CN205356747 U CN 205356747U CN 201620055746 U CN201620055746 U CN 201620055746U CN 205356747 U CN205356747 U CN 205356747U
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Abstract
The utility model relates to a control circuit for constant voltage power supply. It includes main circuit and control circuit, and the system circuit includes control output circuit (1), voltage compensation circuit (2), current compensation circuit (3), reference source circuit (4), the utility model discloses in design be one kind and include and put as the enlargeing and relatively of voltage or electric current with the two fortune of LM358, and the compensating circuit put of two fortune, voltage compensation and current compensation make the fluctuation that can not appear output voltage under its situation of change regardless of change in the load and input voltage. Accurate reference source TL431 is put comparison circuit for fortune and is provided reference voltage, and the resistance of high accuracy is sampled. Utilize signal transmission that photoelectric coupling put fortune output to realize steady voltage control to the main circuit IC in. The utility model discloses but the wide application is in the LED constant voltage power supply technique.
Description
Technical field
This utility model relates to constant voltage source control circuit, particularly relates to and provides a kind of control circuit maintaining electric current in LED constant voltage source.
Background technology
In the utilization of constant voltage source, it is common to the efficiency pursued and little loss, thus it is higher extensively to utilize high-precision reference element and bandwidth Design to make output voltage stability to reach in prior art.But it is not ideal enough that this kind of constant voltage source is applied in LED power, have that energy loss is big, caloric value is high on the contrary, not easily debugging, reliability is low, element is many and problem that output voltage stabilization precision is low.
Utility model content
Problem to be solved in the utility model is to overcome the deficiencies in the prior art, it is provided that a kind of energy loss is little, caloric value is low, easy debugging, reliability is high, element is few and constant voltage source control circuit that output voltage stabilization precision is high.
The technical solution of the utility model is: this utility model it include it and include main circuit and control circuit, described control circuit includes controlling output circuit, voltage compensating circuit, current compensation circuit, reference source circuit, described control output circuit includes Control of Voltage output circuit and electric current controls output circuit, described voltage compensating circuit, current compensation circuit connects described control output circuit respectively, described Control of Voltage output circuit and electric current control output circuit and connect described main circuit respectively, described reference source circuit connects described control output circuit and described current compensation circuit respectively, described current compensation circuit is connected with described voltage compensating circuit, described reference source circuit is connected with the isolation of described main circuit by transformator.
Described Control of Voltage output circuit includes photoelectricity coupled device I, described electric current controls output circuit and includes photoelectricity coupled device II, the input of described electric coupling element I and photoelectricity coupled device II is all connected with described control output circuit, and the outfan of described electric coupling element I and photoelectricity coupled device II is all connected with described main circuit.
Described voltage compensating circuit includes integrated operational amplifier circuit I and peripheral circuit thereof, described current compensation circuit include integrated operational amplifier circuit II and peripheral circuit thereof, described current compensation circuit and described voltage compensating circuit the reference source signal that described reference source circuit transmits is compared, computing, after amplification input to described control output circuit.
Described reference source circuit includes transformator, electrochemical capacitor I, electrochemical capacitor II, resistance I, resistance II, resistance III, resistance I V, electric capacity I, electric capacity II, electric capacity III, transistor, diode, stabilivolt, a reference source element, the armature winding of described transformator connects described main circuit, one end of the secondary windings of described transformator connects the positive pole of described diode, and the other end of the secondary windings of described transformator connects this circuit common, and the negative pole of described diode connects the positive pole of described electrochemical capacitor I, one end of described electric capacity III, one end of described resistance I V, the colelctor electrode of described transistor, the other end of described resistance I V connects the base stage of described transistor, the negative pole of described stabilivolt, the emitter stage of described transistor connects one end of described electric capacity II, one end of described resistance III, the positive pole of described electrochemical capacitor II, one end of described resistance I, one end of described resistance II, the negative pole of described electrochemical capacitor I, the other end of described electric capacity III, the positive pole of described stabilivolt, the other end of described electric capacity II, the other end of described resistance III, the negative pole of described electrochemical capacitor II connects this circuit common, and the other end of described resistance I connects negative pole and the output stage of described a reference source element, one end of described electric capacity I, described current compensation circuit, the positive pole of described a reference source element and the other end of described electric capacity I connect this circuit common, and the other end of described resistance II connects described control output circuit.
The beneficial effects of the utility model are: due to this utility model, it includes it and includes main circuit and control circuit, described control circuit includes controlling output circuit, voltage compensating circuit, current compensation circuit, reference source circuit, described control output circuit includes Control of Voltage output circuit and electric current controls output circuit, described voltage compensating circuit, current compensation circuit connects described control output circuit respectively, described Control of Voltage output circuit and electric current control output circuit and connect described main circuit respectively, described reference source circuit connects described control output circuit and described current compensation circuit respectively, described current compensation circuit is connected with described voltage compensating circuit, described reference source circuit is connected with the isolation of described main circuit by transformator.Described Control of Voltage output circuit includes photoelectricity coupled device I, described electric current controls output circuit and includes photoelectricity coupled device II, the input of described electric coupling element I and photoelectricity coupled device II is all connected with described control output circuit, and the outfan of described electric coupling element I and photoelectricity coupled device II is all connected with described main circuit.Described voltage compensating circuit includes integrated operational amplifier circuit I and peripheral circuit thereof, described current compensation circuit include integrated operational amplifier circuit II and peripheral circuit thereof, described current compensation circuit and described voltage compensating circuit the reference source signal that described reference source circuit transmits is compared, computing, after amplification input to described control output circuit.So this utility model is that a kind of energy loss is little, caloric value is low, easy debugging, reliability is high, element is few and constant voltage source control circuit that output voltage stabilization precision is high.
Accompanying drawing explanation
Fig. 1 is circuit structure principle block diagram of the present utility model；
Fig. 2 is circuit theory schematic diagram of the present utility model；
Fig. 3 is the circuit theory schematic diagram controlling output circuit 1；
Fig. 4 is the circuit theory schematic diagram of voltage compensating circuit 2；
Fig. 5 is the circuit theory schematic diagram of current compensation circuit 3；
Fig. 6 is the circuit theory schematic diagram of reference source circuit 4.
Detailed description of the invention
As shown in figs 1 to 6, this utility model it include main circuit and control circuit, described control circuit includes controlling output circuit 1, voltage compensating circuit 2, current compensation circuit 3, reference source circuit 4, described control output circuit 1 includes Control of Voltage output circuit and electric current controls output circuit, described voltage compensating circuit 2, current compensation circuit 3 connects described control output circuit 1 respectively, described Control of Voltage output circuit and electric current control output circuit and connect described main circuit respectively, described reference source circuit 4 connects described control output circuit 1 and described current compensation circuit 3 respectively, described current compensation circuit 3 is connected with described voltage compensating circuit 2, described reference source circuit (4) is connected with the isolation of described main circuit by transformator.
Described Control of Voltage output circuit includes photoelectricity coupled device I ICA, described electric current controls output circuit and includes photoelectricity coupled device II ICB, the input of described electric coupling element I ICA and photoelectricity coupled device II ICB is all connected with described control output circuit 1, and the outfan of described electric coupling element I ICA and photoelectricity coupled device II ICB is all connected with described main circuit.
Pressure compensates circuit 2 and includes integrated operational amplifier circuit I IC5A and peripheral circuit thereof, described current compensation circuit 3 include integrated operational amplifier circuit II IC5B and peripheral circuit thereof, described current compensation circuit 3 and described voltage compensating circuit 2 reference source signal that described reference source circuit 4 transmits is compared, computing, after amplification input to described control output circuit 1.
Described reference source circuit 4 includes transformator TB, electrochemical capacitor I E1, electrochemical capacitor II E2, resistance I R17, resistance II R18, resistance III R19, resistance I VR20, electric capacity I C10, electric capacity II C11, electric capacity III C12, transistor Q1, diode D3, stabilivolt J3, a reference source element TL431, the armature winding of described transformator TB connects described main circuit, one end of the secondary windings of described transformator TB connects the positive pole of described diode D3, the other end of the secondary windings of described transformator TB connects this circuit common, and the negative pole of described diode D3 connects the positive pole of described electrochemical capacitor I E1, one end of described electric capacity III C12, one end of described resistance I VR20, the colelctor electrode of described transistor Q1, the other end of described resistance I VR20 connects the base stage of described transistor Q1, the negative pole of described stabilivolt J3, the emitter stage of described transistor Q1 connects one end of described electric capacity II C11, one end of described resistance III R19, the positive pole of described electrochemical capacitor II E2, one end of described resistance I R17, one end of described resistance II R18, the negative pole of described electrochemical capacitor I E1, the other end of described electric capacity III C12, the positive pole of described stabilivolt J3, the other end of described electric capacity II C11, the other end of described resistance III R19, the negative pole of described electrochemical capacitor II E2 connects this circuit common, and the other end of described resistance I R17 connects negative pole and the output stage of described a reference source element TL431, one end of described electric capacity I C10, described current compensation circuit 3, the positive pole of described a reference source element TL431 and the other end of described electric capacity I C10 connect this circuit common, and the other end of described resistance II R18 connects described control output circuit 1.
Designed in the present embodiment is a kind of include with the amplification as voltage or electric current of the LM358 double operational and compare, and the compensation circuit of double operational, voltage compensation and current compensation so that it is no matter all without the fluctuation that output voltage occurs under the change of load and the situation of change of input voltage.Accurate a reference source TL431, provides reference voltage for amplifier comparison circuit, and high-precision resistance is sampled.The signal amplifier output utilizing photoelectric coupling is transferred in main circuit IC.The modulation of this utility model bandwidth makes its voltage accuracy good, and the impact by load and input voltage is little.So this utility model is that a kind of circuit is simple, cost is low, it is low to generate heat, reliability is high, the high-precision constant-voltage control circuit of the output of easy debugging, can be widely applied in LED constant voltage source technology.
Claims (4)
1. the control circuit of a constant voltage source, it includes main circuit and control circuit, it is characterized in that: described control circuit includes controlling output circuit (1), voltage compensating circuit (2), current compensation circuit (3), reference source circuit (4), described control output circuit (1) includes Control of Voltage output circuit and electric current controls output circuit, described voltage compensating circuit (2), current compensation circuit (3) connects described control output circuit (1) respectively, described Control of Voltage output circuit and electric current control output circuit and connect described main circuit respectively, described reference source circuit (4) connects described control output circuit (1) and described current compensation circuit (3) respectively, described current compensation circuit (3) is connected with described voltage compensating circuit (2), described reference source circuit (4) is connected with the isolation of described main circuit by transformator.
2. the control circuit of constant voltage source according to claim 1, it is characterized in that: described Control of Voltage output circuit includes photoelectricity coupled device I (ICA), described electric current controls output circuit and includes photoelectricity coupled device II (ICB), the input of described electric coupling element I (ICA) and photoelectricity coupled device II (ICB) is all connected with described control output circuit (1), and the outfan of described electric coupling element I (ICA) and photoelectricity coupled device II (ICB) is all connected with described main circuit.
3. the control circuit of constant voltage source according to claim 1, it is characterized in that: described voltage compensating circuit (2) includes integrated operational amplifier circuit I (IC5A) and peripheral circuit thereof, described current compensation circuit (3) include integrated operational amplifier circuit II (IC5B) and peripheral circuit thereof, described current compensation circuit (3) and described voltage compensating circuit (2) reference source signal that described reference source circuit (4) transmits is compared, computing, after amplification input to described control output circuit (1).
4. the control circuit of constant voltage source according to claim 1, it is characterised in that: described reference source circuit (4) includes transformator (TB), electrochemical capacitor I (E1), electrochemical capacitor II (E2), resistance I (R17), resistance II (R18), resistance III (R19), resistance I V(R20), electric capacity I (C10), electric capacity II (C11), electric capacity III (C12), transistor (Q1), diode (D3), stabilivolt (J3), a reference source element (TL431), the armature winding of described transformator (TB) connects described main circuit, one end of the secondary windings of described transformator (TB) connects the positive pole of described diode (D3), the other end of the secondary windings of described transformator (TB) connects this circuit common, and the negative pole of described diode (D3) connects the positive pole of described electrochemical capacitor I (E1), one end of described electric capacity III (C12), described resistance I V(R20) one end, the colelctor electrode of described transistor (Q1), described resistance I V(R20) the other end connect the base stage of described transistor (Q1), the negative pole of described stabilivolt (J3), the emitter stage of described transistor (Q1) connects one end of described electric capacity II (C11), one end of described resistance III (R19), the positive pole of described electrochemical capacitor II (E2), one end of described resistance I (R17), one end of described resistance II (R18), the negative pole of described electrochemical capacitor I (E1), the other end of described electric capacity III (C12), the positive pole of described stabilivolt (J3), the other end of described electric capacity II (C11), the other end of described resistance III (R19), the negative pole of described electrochemical capacitor II (E2) connects this circuit common, and the other end of described resistance I (R17) connects negative pole and the output stage of described a reference source element (TL431), one end of described electric capacity I (C10), described current compensation circuit (3), the positive pole of described a reference source element (TL431) and the other end of described electric capacity I (C10) connect this circuit common, and the other end of described resistance II (R18) connects described control output circuit (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620055746.7U CN205356747U (en) | 2016-01-21 | 2016-01-21 | A control circuit for constant voltage power supply |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620055746.7U CN205356747U (en) | 2016-01-21 | 2016-01-21 | A control circuit for constant voltage power supply |
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| CN205356747U true CN205356747U (en) | 2016-06-29 |
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| CN201620055746.7U Active CN205356747U (en) | 2016-01-21 | 2016-01-21 | A control circuit for constant voltage power supply |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113009213A (en) * | 2021-02-02 | 2021-06-22 | 深圳车库电桩科技有限公司 | Voltage transmitter |
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2016
- 2016-01-21 CN CN201620055746.7U patent/CN205356747U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113009213A (en) * | 2021-02-02 | 2021-06-22 | 深圳车库电桩科技有限公司 | Voltage transmitter |
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