CN203012565U - Simple multi-voltage and multi-current feedback control circuit capable of accurately adjusting - Google Patents
Simple multi-voltage and multi-current feedback control circuit capable of accurately adjusting Download PDFInfo
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- CN203012565U CN203012565U CN 201220745850 CN201220745850U CN203012565U CN 203012565 U CN203012565 U CN 203012565U CN 201220745850 CN201220745850 CN 201220745850 CN 201220745850 U CN201220745850 U CN 201220745850U CN 203012565 U CN203012565 U CN 203012565U
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Abstract
The utility model discloses a simple multi-voltage and multi-current feedback control circuit capable of accurately adjusting, and belongs to the technical field of circuits. A voltage feedback reference voltage adjusting circuit is connected with one input port of a voltage feedback comparer through a voltage feedback reference voltage; an output voltage detection circuit is connected to another input port of the voltage feedback comparer; an output port of the voltage feedback comparer is connected with a feedback optocoupler; a current feedback reference voltage adjusting circuit is connected to one input port of a current feedback comparer through a current feedback reference voltage; the voltage feedback reference voltage is adjusted and controlled through the voltage feedback reference voltage adjusting circuit; and the current feedback reference voltage is adjusted and controlled through the current feedback reference voltage adjusting circuit, so that the effect of multi-voltage and multi-current feedback control is realized.
Description
Technical field
The utility model relates to a kind of adjustable feedback control circuit, specifically the accurate adjustable feedback control circuit of a kind of simple multivoltage multiple current.
Background technology
In the feedback control technology scope of Switching Power Supply, univoltage list Current Feedback Control has been proven technique very, as shown in Figure 1, for the Switching Power Supply that the common univoltage arrived or electric current are exported at present, especially for general lower powered charger, substantially meet the demand of electronic product.
Yet along with the growing of power supply industry and electronic product outward appearance, the requirement of function etc., and the variation of product purpose, intelligent, high power, research and development with New Products, the raising that applied environment etc. require, especially charger aspect, variation for rechargeable battery, high power, the requirements such as the science of charging method, common to univoltage or single Current Feedback Control can't satisfy the demands, this just needs to use multivoltage, or multiple current, the feedback control circuit of multivoltage multiple current even, and require accurately to control, could meet like this demand of product in the future that reaches now.
Summary of the invention
The problem existed for above-mentioned prior art, the utility model provides a kind of simple multivoltage multiple current accurate adjustable feedback control circuit, can realize the function of the accurate adjustable FEEDBACK CONTROL of multivoltage multiple current.
To achieve these goals, the technical solution adopted in the utility model is: the accurate adjustable feedback control circuit of a kind of simple multivoltage multiple current, comprise the feedback optocoupler, Voltage Feedback is device relatively, the current feedback comparer, output voltage detecting circuit, the Voltage Feedback reference voltage circuit, output current detection circuit and current feedback reference voltage circuit, also comprise Voltage Feedback reference voltage regulating circuit and current feedback reference voltage regulating circuit, the Voltage Feedback reference voltage regulating circuit is connected to relatively one of them input port of device of Voltage Feedback by the Voltage Feedback reference voltage, output voltage detecting circuit is connected to the relatively another one input port of device of Voltage Feedback, the output port of Voltage Feedback comparison device is connected to the feedback optocoupler, the current feedback reference voltage regulating circuit is connected to one of them input port of current feedback comparer by the current feedback reference voltage, output current detection circuit is connected to the another one input port of current feedback comparer, the output port of current feedback comparer is connected to the feedback optocoupler, the feedback reference voltage regulating circuit comprises resistance R 5, resistance R 6, micro-chip processor U3, the 1st pin of micro-chip processor U3 is connected to the tie point of resistance R 4 and resistance R 9 by resistance R 5, the 2nd pin of micro-chip processor U3 is connected to the tie point of resistance R 4 and resistance R 9 by resistance R 6, the current feedback reference voltage regulating circuit comprises resistance R 16, resistance R 17, micro-chip processor U3, the 8th pin of micro-chip processor U3 is connected to the tie point of resistance R 14 and resistance R 15 by resistance R 16, the 9th pin of micro-chip processor U3 is connected to the tie point of resistance R 14 and resistance R 15 by resistance R 17, the 14th connect+5V of the pin voltage of micro-chip processor U3, the 7th pin ground connection.。
The feedback optocoupler comprises resistance R 1, optocoupler U1A, diode D2, and output voltage is received the anode of the light emitting diode in optocoupler U1A by resistance R 1, and the negative electrode of the light emitting diode in optocoupler U1A is connected with the anode of diode D1 and the anode of diode.
Voltage Feedback comparison device comprises comparison amplifier U2A, resistance R 2, capacitor C 1, capacitor C 2, diode D1, comparison amplifier the 8th pin is by capacitor C 1 ground connection, the direct ground connection of the 4th pin, capacitor C 2 and resistance R 2 are connected in series between the 1st pin and the 2nd pin of comparison amplifier, capacitor C 2 is connected with comparison amplifier the 1st pin, resistance R 2 is connected with comparison amplifier the 2nd pin, the negative electrode of diode D1 connects the 1st pin of comparison amplifier, the negative electrode of the light emitting diode in the anodic bonding optocoupler U1A of diode D1.
The current feedback comparer comprises comparison amplifier U2B, resistance R 12, capacitor C 3, diode D2, capacitor C 3 and resistance R 12 are connected in series between the 7th pin and the 6th pin of comparison amplifier, capacitor C 3 is connected with comparison amplifier the 7th pin, resistance R 12 is connected with comparison amplifier the 6th pin, the negative electrode of diode D2 connects the 7th pin of comparison amplifier, the negative electrode of the light emitting diode in the anodic bonding optocoupler U1A of diode D2.
Output voltage detecting circuit comprises resistance R 3, resistance R 10, resistance R 11, and output voltage is connected to ground through resistance R 10 and resistance R 11, and resistance R 3 one ends are connected between resistance R 10 and resistance R 11, and an end is connected to the 2nd pin of comparison amplifier U2A.
The Voltage Feedback reference voltage circuit comprises resistance R 4, resistance R 9, and reference voltage+5V is connected to ground through resistance R 4 and resistance R 9, and resistance R 4 and resistance R 9 tie points are connected to the 3rd pin of comparison amplifier.
Output current detection circuit comprises resistance R 13, and the voltage on the inspection leakage resistance is connected to the 6th pin of comparison amplifier U2B through resistance R 13.
The current feedback reference voltage circuit comprises resistance R 14, resistance R 15, and reference voltage+5V is connected to ground through resistance R 14 and resistance R 15, and resistance R 14 and resistance R 15 tie points are connected to the 5th pin of comparison amplifier.
With existing apparatus, compare, the utility model is controlled the Voltage Feedback reference voltage by the adjustment of Voltage Feedback reference voltage regulating circuit, the current feedback reference voltage is controlled in the adjustment of current feedback reference voltage regulating circuit, realize the effect of multivoltage multiple current FEEDBACK CONTROL, meet the demand of growing power supply product; This circuit arrangement can be widely used in various battery chargers and some power source special.
The accompanying drawing explanation
Fig. 1 is existing feedback circuit schematic diagram;
Fig. 2 is the utility model circuit diagram;
Fig. 3 is the circuit theory diagrams of the two-way feedback control circuit of the accurate adjustable feedback control circuit of a kind of simple multivoltage multiple current of the utility model embodiment;
Fig. 4 is the circuit theory diagrams of the multichannel feedback control circuit of the accurate adjustable feedback control circuit of a kind of simple multivoltage multiple current of the utility model embodiment.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
As shown in Figures 2 to 4: the accurate adjustable feedback control circuit of a kind of simple multivoltage multiple current of the utility model, comprise the feedback optocoupler, Voltage Feedback is device relatively, the current feedback comparer, output voltage detecting circuit, the Voltage Feedback reference voltage circuit, output current detection circuit, the current feedback reference voltage circuit, Voltage Feedback reference voltage regulating circuit and current feedback reference voltage regulating circuit, the Voltage Feedback reference voltage regulating circuit is connected to relatively one of them input port of device of Voltage Feedback by the Voltage Feedback reference voltage, output voltage detecting circuit is connected to the relatively another one input port of device of Voltage Feedback, the output port of Voltage Feedback comparison device is connected to feedback optocoupler 1, the current feedback reference voltage regulating circuit is connected to one of them input port of current feedback comparer by the current feedback reference voltage, output current detection circuit is connected to the another one input port of current feedback comparer, the output port of current feedback comparer is connected to the feedback optocoupler, the feedback optocoupler comprises resistance R 1, optocoupler U1A, diode D2, and output voltage is received the anode of the light emitting diode in optocoupler U1A by resistance R 1, and the negative electrode of the light emitting diode in optocoupler U1A is connected with the anode of diode D1 and the anode of diode, Voltage Feedback comparison device comprises comparison amplifier U2A, resistance R 2, capacitor C 1, capacitor C 2, diode D1, comparison amplifier the 8th pin is by capacitor C 1 ground connection, the direct ground connection of the 4th pin, capacitor C 2 and resistance R 2 are connected in series between the 1st pin and the 2nd pin of comparison amplifier, capacitor C 2 is connected with comparison amplifier the 1st pin, resistance R 2 is connected with comparison amplifier the 2nd pin, the negative electrode of diode D1 connects the 1st pin of comparison amplifier, the negative electrode of the light emitting diode in the anodic bonding optocoupler U1A of diode D1, the current feedback comparer comprises comparison amplifier U2B, resistance R 12, capacitor C 3, diode D2, capacitor C 3 and resistance R 12 are connected in series between the 7th pin and the 6th pin of comparison amplifier, capacitor C 3 is connected with comparison amplifier the 7th pin, resistance R 12 is connected with comparison amplifier the 6th pin, the negative electrode of diode D2 connects the 7th pin of comparison amplifier, the negative electrode of the light emitting diode in the anodic bonding optocoupler U1A of diode D2, output voltage detecting circuit comprises resistance R 3, resistance R 10, resistance R 11, and output voltage is connected to ground through resistance R 10 and resistance R 11, and resistance R 3 one ends are connected between resistance R 10 and resistance R 11, and an end is connected to the 2nd pin of comparison amplifier U2A, the Voltage Feedback reference voltage circuit comprises resistance R 4, resistance R 9, and reference voltage+5V is connected to ground through resistance R 4 and resistance R 9, and resistance R 4 and resistance R 9 tie points are connected to the 3rd pin of comparison amplifier, output current detection circuit comprises resistance R 13, and the voltage on the inspection leakage resistance is connected to the 6th pin of comparison amplifier U2B through resistance R 13, the current feedback reference voltage circuit comprises resistance R 14, resistance R 15, and reference voltage+5V is connected to ground through resistance R 14 and resistance R 15, and resistance R 14 and resistance R 15 tie points are connected to the 5th pin of comparison amplifier, the Voltage Feedback reference voltage regulating circuit comprises resistance R 5, resistance R 6, micro-chip processor U3, the 1st pin of micro-chip processor U3 is connected to the tie point of resistance R 4 and resistance R 9 by resistance R 5, the 2nd pin of micro-chip processor U3 is connected to the tie point of resistance R 4 and resistance R 9 by resistance R 6, the current feedback reference voltage regulating circuit comprises resistance R 16, resistance R 17, micro-chip processor U3, the 8th pin of micro-chip processor U3 is connected to the tie point of resistance R 14 and resistance R 15 by resistance R 16, the 9th pin of micro-chip processor U3 is connected to the tie point of resistance R 14 and resistance R 15 by resistance R 17, the 14th connect+5V of the pin voltage of micro-chip processor U3, the 7th pin ground connection.
As shown in Figure 3, if there is no the Voltage Feedback reference voltage regulating circuit, only have resistance R 4 and the resistance R 9 dividing potential drops reference voltage as output voltage, output voltage can only have a kind ofly like this, can't adjust; And after increasing the Voltage Feedback reference voltage regulating circuit, the 1st pin of microcontroller chip U3 and the 2nd pin output low level or high level or high-impedance state controlling resistance R5 and resistance R 6 ground connection or connect+5V voltage or unsettled, thereby change partial pressure value, change reference voltage value, reach the purpose of controlling multiple voltage output; The 1st pin of microcontroller chip U3 and the 2nd pin be output low level simultaneously, resistance R 5 and resistance R 6 ground connection, and resistance R 5 and resistance R 6 are parallel to resistance R 9, and reference voltage is the dividing potential drop that the equivalent resistance after resistance R 5, resistance R 6 and resistance R 9 parallel connections is followed resistance R 4; The 1st pin and the 2nd pin of microcontroller chip U3 are exported high level simultaneously, resistance R 5 and be connected to+5V of resistance R 6 voltage, resistance R 5 and resistance R 6 are parallel to resistance R 4, and reference voltage is the dividing potential drop of resistance R 9 with the equivalent resistance after resistance R 5, resistance R 6 and resistance R 4 parallel connections; The 1st pin and the 2nd pin of microcontroller chip U3 are exported high-impedance state simultaneously, and resistance R 5 and resistance R 6 are in vacant state, and reference voltage is the dividing potential drop of resistance R 9 with resistance R 4; The 1st pin output low level of microcontroller chip U3, the 2nd pin output high level, resistance R 5 ground connection, connect+5V of resistance R 6 voltage, resistance R 5 and resistance R 9 parallel connections, resistance R 6 and resistance R 4 parallel connections, the dividing potential drop that reference voltage is equivalent resistance after resistance R 5 and the resistance R 9 parallel connections equivalent resistance after with resistance R 6 and resistance R 4 parallel connections; The 1st pin output high level of microcontroller chip U3, the 2nd pin output low level, connect+5V of resistance R 5 voltage, resistance R 6 ground connection, resistance R 5 and resistance R 4 parallel connections, resistance R 6 and resistance R 9 parallel connections, the dividing potential drop that reference voltage is equivalent resistance after resistance R 6 and the resistance R 9 parallel connections equivalent resistance after with resistance R 5 and resistance R 4 parallel connections; The 1st pin output low level of microcontroller chip U3, the 2nd pin output high-impedance state, resistance R 5 ground connection, resistance R 6 is in vacant state, resistance R 5 and resistance R 9 parallel connections, reference voltage is equivalent resistance after resistance R 5 and the resistance R 9 parallel connections dividing potential drop with resistance R 4; The 1st pin output high-impedance state of microcontroller chip U3, the 2nd pin output low level, resistance R 5 is in vacant state, resistance R 6 ground connection, resistance R 6 and resistance R 9 parallel connections, reference voltage is equivalent resistance after resistance R 6 and the resistance R 9 parallel connections dividing potential drop with resistance R 4; The 1st pin output high level of microcontroller chip U3, the 2nd pin output high-impedance state, connect+5V of resistance R 5 voltage, resistance R 6 is in vacant state, resistance R 5 and resistance R 4 parallel connections, the dividing potential drop that reference voltage is resistance R 9 equivalent resistance after with resistance R 5 and resistance R 4 parallel connections; The 1st pin output high-impedance state of microcontroller chip U3, the 2nd pin output high level, resistance R 5 is in vacant state, connect+5V of resistance R 6 voltage, resistance R 6 and resistance R 4 parallel connections, the dividing potential drop that reference voltage is resistance R 9 equivalent resistance after with resistance R 6 and resistance R 4 parallel connections; So, reach multivoltage output and control the purpose of adjusting.
As shown in Figure 3, if there is no the current feedback reference voltage regulating circuit, only have resistance R 14 and the resistance R 15 dividing potential drops reference voltage as output current, output current can only have a kind ofly like this, can't adjust; And after increasing the current feedback reference voltage regulating circuit, the 8th pin of microcontroller chip U3 and the 9th pin output low level or high level or high-impedance state controlling resistance R16 and resistance R 17 ground connection or connect+5V voltage or unsettled, thereby change partial pressure value, change reference voltage value, reach the purpose of controlling multiple electric current output; The 8th pin of microcontroller chip U3 and the 9th pin be output low level simultaneously, resistance R 16 and resistance R 17 ground connection, resistance R 16 and resistance R 17 are parallel to resistance R 15, and reference voltage is the dividing potential drop that the equivalent resistance after resistance R 16, resistance R 17 and resistance R 15 parallel connections is followed resistance R 14; The 8th pin and the 9th pin of microcontroller chip U3 are exported high level simultaneously, resistance R 16 and be connected to+5V of resistance R 17 voltage, resistance R 16 and resistance R 17 are parallel to resistance R 14, and reference voltage is the dividing potential drop of resistance R 15 with the equivalent resistance after resistance R 16, resistance R 17 and resistance R 14 parallel connections; The 8th pin and the 9th pin of microcontroller chip U3 are exported high-impedance state simultaneously, and resistance R 16 and resistance R 17 are in vacant state, and reference voltage is the dividing potential drop of resistance R 15 with resistance R 14; The 8th pin output low level of microcontroller chip U3, the 9th pin output high level, resistance R 16 ground connection, connect+5V of resistance R 17 voltage, resistance R 16 and resistance R 15 parallel connections, resistance R 17 and resistance R 14 parallel connections, the dividing potential drop that reference voltage is equivalent resistance after resistance R 16 and the resistance R 15 parallel connections equivalent resistance after with resistance R 17 and resistance R 14 parallel connections; The 8th pin output high level of microcontroller chip U3, the 9th pin output low level, connect+5V of resistance R 16 voltage, resistance R 17 ground connection, resistance R 16 and resistance R 14 parallel connections, resistance R 17 and resistance R 15 parallel connections, the dividing potential drop that reference voltage is equivalent resistance after resistance R 17 and the resistance R 15 parallel connections equivalent resistance after with resistance R 16 and resistance R 14 parallel connections; The 8th pin output low level of microcontroller chip U3, the 9th pin output high-impedance state, resistance R 16 ground connection, resistance R 17 is in vacant state, resistance R 16 and resistance R 15 parallel connections, reference voltage is the dividing potential drop that the equivalent resistance after resistance R 16 and resistance R 15 parallel connections is followed resistance R 14; The 8th pin output high-impedance state of microcontroller chip U3, the 9th pin output low level, resistance R 16 is in vacant state, resistance R 17 ground connection, resistance R 17 and resistance R 15 parallel connections, reference voltage is the dividing potential drop that the equivalent resistance after resistance R 17 and resistance R 15 parallel connections is followed resistance R 14; The 8th pin output high level of microcontroller chip U3, the 9th pin output high-impedance state, connect+5V of resistance R 16 voltage, resistance R 17 is in vacant state, resistance R 16 and resistance R 14 parallel connections, the dividing potential drop that reference voltage is resistance R 15 equivalent resistance after with resistance R 16 and resistance R 14 parallel connections; The 8th pin output high-impedance state of microcontroller chip U3, the 9th pin output high level, resistance R 16 is in vacant state, connect+5V of resistance R 17 voltage, resistance R 17 and resistance R 14 parallel connections, the dividing potential drop that reference voltage is resistance R 15 equivalent resistance after with resistance R 17 and resistance R 14 parallel connections; So, reach multivoltage output and control the purpose of adjusting.
As shown in Figure 4, the Voltage Feedback reference voltage regulating circuit can expand to N(N>2) individual, each pin of micro-chip processor U3 (as the 1st pin to the 6 pins) output low level or high level or high-impedance state, control each resistance (as R5 to R6) in ground connection or connect+5V voltage or high-impedance state, each stake resistance is in parallel with resistance R 9, respectively connect+5V voltage resistance is in parallel with resistance R 4, each resistance in high-impedance state is in vacant state, now the reference voltage of Voltage Feedback is the partial pressure value of each stake resistance with equivalent resistance after the equivalent resistance after resistance R 9 is in parallel is followed respectively connect+5V voltage resistance and resistance R 4 parallel connections, the combination of different resistance can have the reference voltage of different partial pressure value as output voltage, so just can expand to (2
n-1) 3 kinds of reference voltages of *, just can control and adjust (2
n-1) 3 kinds of output voltages of *, reach and expand to the purpose that more multivoltage output is controlled.
As shown in Figure 4, the current feedback reference voltage regulating circuit can expand to M(M>2) individual, each pin of micro-chip processor U3 (as the 8th pin to the 13 pins) output low level or high level or high-impedance state, control each resistance (as R16 to R17) in ground connection or connect+5V voltage or high-impedance state, each stake resistance is in parallel with resistance R 15, respectively connect+5V voltage resistance is in parallel with resistance R 14, each resistance in high-impedance state is in vacant state, now the reference voltage of Voltage Feedback is the partial pressure value of each stake resistance with equivalent resistance after the equivalent resistance after resistance R 9 is in parallel is followed respectively connect+5V voltage resistance and resistance R 4 parallel connections, the combination of different resistance can have the reference voltage of different partial pressure value as output voltage, so just can expand to (2
m-1) 3 kinds of reference voltages of *, just can control and adjust (2
m-1) 3 kinds of output voltages of *, reach and expand to the purpose that more multivoltage output is controlled.
Claims (8)
1. the accurate adjustable feedback control circuit of simple multivoltage multiple current, comprise the feedback optocoupler, Voltage Feedback is device relatively, the current feedback comparer, output voltage detecting circuit, the Voltage Feedback reference voltage circuit, output current detection circuit and current feedback reference voltage circuit, it is characterized in that, also comprise Voltage Feedback reference voltage regulating circuit and current feedback reference voltage regulating circuit, the Voltage Feedback reference voltage regulating circuit is connected to relatively one of them input port of device of Voltage Feedback by the Voltage Feedback reference voltage, output voltage detecting circuit is connected to the relatively another one input port of device of Voltage Feedback, the output port of Voltage Feedback comparison device is connected to the feedback optocoupler, the current feedback reference voltage regulating circuit is connected to one of them input port of current feedback comparer by the current feedback reference voltage, output current detection circuit is connected to the another one input port of current feedback comparer, the output port of current feedback comparer is connected to the feedback optocoupler, the feedback reference voltage regulating circuit comprises resistance R 5, resistance R 6, micro-chip processor U3, the 1st pin of micro-chip processor U3 is connected to the tie point of resistance R 4 and resistance R 9 by resistance R 5, the 2nd pin of micro-chip processor U3 is connected to the tie point of resistance R 4 and resistance R 9 by resistance R 6, the current feedback reference voltage regulating circuit comprises resistance R 16, resistance R 17, micro-chip processor U3, the 8th pin of micro-chip processor U3 is connected to the tie point of resistance R 14 and resistance R 15 by resistance R 16, the 9th pin of micro-chip processor U3 is connected to the tie point of resistance R 14 and resistance R 15 by resistance R 17, the 14th connect+5V of the pin voltage of micro-chip processor U3, the 7th pin ground connection.
2. the accurate adjustable feedback control circuit of a kind of simple multivoltage multiple current according to claim 1, it is characterized in that, described feedback optocoupler comprises resistance R 1, optocoupler U1A, diode D2, output voltage is received the anode of the light emitting diode in optocoupler U1A by resistance R 1, the negative electrode of the light emitting diode in optocoupler U1A is connected with the anode of diode D1 and the anode of diode.
3. the accurate adjustable feedback control circuit of a kind of simple multivoltage multiple current according to claim 1, it is characterized in that, described Voltage Feedback comparison device comprises comparison amplifier U2A, resistance R 2, capacitor C 1, capacitor C 2, diode D1, comparison amplifier the 8th pin is by capacitor C 1 ground connection, the direct ground connection of the 4th pin, capacitor C 2 and resistance R 2 are connected in series between the 1st pin and the 2nd pin of comparison amplifier, capacitor C 2 is connected with comparison amplifier the 1st pin, resistance R 2 is connected with comparison amplifier the 2nd pin, the negative electrode of diode D1 connects the 1st pin of comparison amplifier, the negative electrode of the light emitting diode in the anodic bonding optocoupler U1A of diode D1.
4. the accurate adjustable feedback control circuit of a kind of simple multivoltage multiple current according to claim 1, it is characterized in that, described current feedback comparer comprises comparison amplifier U2B, resistance R 12, capacitor C 3, diode D2, capacitor C 3 and resistance R 12 are connected in series between the 7th pin and the 6th pin of comparison amplifier, capacitor C 3 is connected with comparison amplifier the 7th pin, resistance R 12 is connected with comparison amplifier the 6th pin, the negative electrode of diode D2 connects the 7th pin of comparison amplifier, the negative electrode of the light emitting diode in the anodic bonding optocoupler U1A of diode D2.
5. the accurate adjustable feedback control circuit of a kind of simple multivoltage multiple current according to claim 1, it is characterized in that, described output voltage detecting circuit comprises resistance R 3, resistance R 10, resistance R 11, output voltage is connected to ground through resistance R 10 and resistance R 11, resistance R 3 one ends are connected between resistance R 10 and resistance R 11, and an end is connected to the 2nd pin of comparison amplifier U2A.
6. the accurate adjustable feedback control circuit of a kind of simple multivoltage multiple current according to claim 1, it is characterized in that, described Voltage Feedback reference voltage circuit comprises resistance R 4, resistance R 9, reference voltage+5V is connected to ground through resistance R 4 and resistance R 9, and resistance R 4 and resistance R 9 tie points are connected to the 3rd pin of comparison amplifier.
7. the accurate adjustable feedback control circuit of a kind of simple multivoltage multiple current according to claim 1, it is characterized in that, described output current detection circuit comprises resistance R 13, and the voltage on the inspection leakage resistance is connected to the 6th pin of comparison amplifier U2B through resistance R 13.
8. the accurate adjustable feedback control circuit of a kind of simple multivoltage multiple current according to claim 1, it is characterized in that, described current feedback reference voltage circuit comprises resistance R 14, resistance R 15, reference voltage+5V is connected to ground through resistance R 14 and resistance R 15, and resistance R 14 and resistance R 15 tie points are connected to the 5th pin of comparison amplifier.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220745850 CN203012565U (en) | 2012-12-29 | 2012-12-29 | Simple multi-voltage and multi-current feedback control circuit capable of accurately adjusting |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220745850 CN203012565U (en) | 2012-12-29 | 2012-12-29 | Simple multi-voltage and multi-current feedback control circuit capable of accurately adjusting |
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| CN203012565U true CN203012565U (en) | 2013-06-19 |
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| CN 201220745850 Expired - Fee Related CN203012565U (en) | 2012-12-29 | 2012-12-29 | Simple multi-voltage and multi-current feedback control circuit capable of accurately adjusting |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105914832A (en) * | 2016-05-20 | 2016-08-31 | 深圳维普创新科技有限公司 | Adjustable voltage feedback circuit with constant current protection and working method |
| CN107171555A (en) * | 2017-07-25 | 2017-09-15 | 西安电子科技大学 | A kind of mu balanced circuit applied to high tension voltage IC interior |
| CN107820347A (en) * | 2017-11-30 | 2018-03-20 | 欧普照明股份有限公司 | A kind of driving power and lighting device |
-
2012
- 2012-12-29 CN CN 201220745850 patent/CN203012565U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105914832A (en) * | 2016-05-20 | 2016-08-31 | 深圳维普创新科技有限公司 | Adjustable voltage feedback circuit with constant current protection and working method |
| CN105914832B (en) * | 2016-05-20 | 2021-07-06 | 深圳维普创新科技有限公司 | Adjustable voltage feedback circuit with constant current protection and working method |
| CN107171555A (en) * | 2017-07-25 | 2017-09-15 | 西安电子科技大学 | A kind of mu balanced circuit applied to high tension voltage IC interior |
| CN107820347A (en) * | 2017-11-30 | 2018-03-20 | 欧普照明股份有限公司 | A kind of driving power and lighting device |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130619 Termination date: 20141229 |
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