CN107682972A - A kind of base has the light-operated with short-circuit type voltage regulation Switching Power Supply of voltage adjustment processing - Google Patents
A kind of base has the light-operated with short-circuit type voltage regulation Switching Power Supply of voltage adjustment processing Download PDFInfo
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- CN107682972A CN107682972A CN201711047317.0A CN201711047317A CN107682972A CN 107682972 A CN107682972 A CN 107682972A CN 201711047317 A CN201711047317 A CN 201711047317A CN 107682972 A CN107682972 A CN 107682972A
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/37—Converter circuits
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/40—Details of LED load circuits
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- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The invention discloses a kind of base the light-operated with short-circuit type voltage regulation Switching Power Supply of voltage adjustment processing; it is characterized in that; mainly by control chip U2; transformer T; short-circuit protective circuit of voltage regulation; diode rectifier U1; polar capacitor C1; polar capacitor C2; voltage-regulator diode D1; the phase adjusting circuit being connected with control chip U2, the voltage conditioning output circuit being connected respectively with control chip U2 and diode rectifier U1, and the comparison amplifying circuit being serially connected between control chip U2 PWM pins and voltage conditioning output circuit form；The present invention can be to input voltage and electric current pulse dynamic be adjusted, and the present invention can also be adjusted to the intensity of output voltage and electric current, ensure that the stability for the voltage and current that the present invention exports, the stability of light-operated LED (liquid crystal diode) lamp brightness effectively is ensure that, and improves the service life of LED.
Description
Technical field
The present invention relates to a kind of Switching Power Supply, is that a kind of base has the light-operated with short of voltage adjustment processing specifically
Road type voltage regulation Switching Power Supply.
Background technology
At present, because LED has the characteristics that energy consumption is low, service life is long and safety and environmental protection, it has become people
One of the main product of life lighting.People are realized to LED using acoustic control or light-operated control system more in life
Open and close.Light-operated LED control system can control the unlatching of LED and pass because of it according to the brightness of LED use environment
Close, and can effectively meet requirement of the people to LED in terms of energy-conservation, and enjoy the favor of people.It is however, existing light-operated
There is the problem of output voltage and unstable electric current in LED power, cause the brightness of light-operated LED (liquid crystal diode) lamp unstable, had a strong impact on LED
The service life of lamp.
Therefore it provides a kind of light-operated LED power supply that can export stable voltage and current is the task of top priority.
The content of the invention
It is an object of the invention to overcome, there is output voltage in light-operated LED power supply of the prior art and electric current is unstable
Defect, there is provided a kind of base have voltage adjustment processing it is light-operated with short-circuit type voltage regulation Switching Power Supply.
The present invention is achieved through the following technical solutions：A kind of base has light-operated being opened with short-circuit type voltage regulation of voltage adjustment processing
Powered-down source, mainly exported by control chip U2, transformer T, diode rectifier U1, the positive pole of positive pole and diode rectifier U1
End is connected, the polar capacitor C1 that negative pole is connected with diode rectifier U1 cathode output end, positive pole and polar capacitor C1
Positive pole be connected, polar capacitor C2, the N pole that negative pole is connected after resistance R1 with polar capacitor C1 negative pole and control chip
The voltage-regulator diode D1 that U2 VIN pins are connected, P poles are connected with diode rectifier U1 cathode output end, with control
The phase adjusting circuit that chip U2 is connected, the voltage conditioning being connected respectively with control chip U2 and diode rectifier U1 are defeated
Go out circuit, the short-circuit protective circuit of voltage regulation being connected respectively with phase adjusting circuit and voltage conditioning output circuit, and concatenation
Comparison amplifying circuit composition between control chip U2 PWM pins and voltage conditioning output circuit；The transformer T secondary
The Same Name of Ends of inductance coil is connected with diode rectifier U1 one of input, its non-same polarity and diode rectification
Device U1 another input is connected；Control chip U2 GND pins ground connection；
The short-circuit protective circuit of voltage regulation is by voltage stabilizing chip U101, triode VT101, triode VT102, one end and three poles
The resistance R101 that pipe VT101 emitter stage is connected, the other end is connected with voltage stabilizing chip U101 IN pins, positive pole and three poles
Pipe VT101 colelctor electrode is connected, the polar capacitor C101 of negative pole ground connection, one end is connected with triode VT101 emitter stage,
Resistance R102, the P pole that the other end is connected with triode VT102 colelctor electrode is connected with triode VT101 base stage, N poles
The diode D101 being connected with triode VT102 base stage, positive pole is connected with triode VT102 base stage, negative pole is through electricity
The polar capacitor C102 that is connected with voltage stabilizing chip U101 GND pins after resistance R104, positive pole is after adjustable resistance R103 with three
The polar capacitor C103 that pole pipe VT102 emitter stage is connected, negative pole is connected with voltage stabilizing chip U101 OUT pins, and
One end is connected with polar capacitor C103 negative pole, the resistance R105 compositions of other end ground connection；The transmitting of the triode VT101
Pole is connected with phase adjusting circuit, and triode VT101 colelctor electrode is connected with voltage stabilizing chip U101 IN pins；It is described
Voltage stabilizing chip U101 GND pins ground connection, voltage stabilizing chip U101 OUT pins are connected with voltage conditioning output circuit.
It is described relatively amplifying circuit by triode VT4, triode VT5, triode VT6, positive pole after resistance R14 with three poles
Pipe VT4 base stage is connected, negative pole is connected as the input for comparing amplifying circuit and with control chip U2 PWM pins
Polar capacitor C9, P pole is connected after resistance R13 with polar capacitor C9 positive pole, N poles after resistance R18 with triode VT4's
The diode D6 that colelctor electrode is connected, positive pole is connected after resistance R15 with polar capacitor C9 positive pole, the polarity of negative pole ground connection
Electric capacity C10, the polar capacitor that negative pole is connected with triode VT6 base stage, positive pole is connected with triode VT4 colelctor electrode
Two poles that C11, N pole are connected with triode VT5 base stage, P poles are connected after resistance R17 with triode VT4 emitter stage
Pipe D7, after positive pole is connected after resistance R16 with triode VT4 emitter stage, negative pole is connected with triode VT5 emitter stage
The polar capacitor C12 of ground connection, positive pole is connected after resistance R21 with triode VT6 emitter stage, negative pole after resistance R20 with
The polar capacitor C13 that triode VT5 emitter stage is connected, one end is connected with diode D6 N poles, the other end and triode
The resistance R19 that VT6 colelctor electrode is connected, and P poles are connected with triode VT6 colelctor electrode, N poles are through adjustable resistance R22
The voltage-regulator diode D8 compositions being connected afterwards with polar capacitor C13 negative pole；The colelctor electrode and triode of the triode VT5
VT6 emitter stage is connected；Nursed one's health as the output end for comparing amplifying circuit and with voltage defeated in the N poles of the voltage-regulator diode D8
Go out circuit to be connected.
The phase adjusting circuit is by triode VT1, triode VT2, SS of the positive pole after resistance R1 with control chip U2
Polar capacitor C3, the P pole that pin is connected, negative pole is connected with triode VT1 emitter stage and control chip U2 SIN pins
It is connected, the diode D2 that N poles are connected with triode VT1 colelctor electrode, COC of the positive pole after resistance R4 with control chip U2
The polar capacitor C4 that pin is connected, negative pole is connected after resistance R3 with triode VT1 emitter stage, negative pole and control chip
The polar capacitor C5 that U2 FC pins are connected, positive pole is connected after resistance R5 with triode VT2 colelctor electrode, and N poles
It is connected after resistance R7 with control chip U2 CR pins, P poles are connected after resistance R6 with triode VT2 emitter stage
Diode D3 is formed；The N poles of the diode D3 are connected with control chip U2 SHDN pins, its P pole and triode VT101
Emitter stage be connected；；The base stage of the triode VT2 is connected with triode VT1 base stage, its emitter stage and polar capacitor
C4 negative pole is grounded after being connected；The positive pole of the polar capacitor C4 is connected with triode VT1 base stage.
Voltage conditioning output circuit is by FET MOS, triode VT3, positive pole after resistance R8 with triode VT3
Emitter stage be connected, the polar capacitor C6 that negative pole is connected with diode rectifier U1 cathode output end, one end and field are imitated
Should pipe MOS drain electrode be connected, the adjustable resistance R12 that the other end is connected with voltage stabilizing chip U101OUT pins, one end and polarity
Inductance L2, the N pole that electric capacity C6 positive pole is connected, the other end is connected with voltage stabilizing chip U101 OUT pins is after resistance R10
It is connected with FET MOS source electrode, the diode D4 that P poles are connected with triode VT3 base stage, negative pole and triode
The polar capacitor C7 that VT3 colelctor electrode is connected, positive pole is connected with FET MOS grid, and positive pole is sequentially through electricity
It is connected after resistance R9 and inductance L1 with control chip U2 FB pins, adjustable end of the negative pole after resistance R11 with adjustable resistance R12
The polar capacitor C8 compositions being connected；The grid of the FET MOS respectively with control chip U2 VOUT pins and voltage stabilizing
Diode D8 N poles are connected, it drains and voltage stabilizing chip U101 OUT pins are collectively forming the defeated of voltage conditioning output circuit
Go out end.
For the practical effect of the present invention, the control chip U2 is then preferentially realized using L296 integrated chips；
The voltage stabilizing chip U101 is 7805ABT integrated chips.
The present invention compared with prior art, has advantages below and beneficial effect：
(1) the pulse dynamic that the present invention can be to input voltage and electric current is adjusted, and the present invention can also be to output electricity
Pressure and the intensity of electric current are adjusted, and are ensured that the stability for the voltage and current that the present invention exports, effectively be ensure that
The stability of light-operated LED (liquid crystal diode) lamp brightness, and improve the service life of LED.
(2) the short-circuit protective circuit of voltage regulation that the present invention is set can be in the instant high-voltage or electricity that the short circuit of this source element occurs
Stream is suppressed；And voltage to passing through can be combined with its peripheral electronic component by the voltage stabilizing chip set by the circuit
Quickly it is depressured, while timely blocks this power supply, so as to effectively ensure that the load of Switching Power Supply will not be damaged.
(3) present invention can strengthen voltage amplitude and current amplitude, so as to improve output voltage and electricity of the present invention
The accuracy of stream.
(4) control chip U of the invention is realized using L296 integrated chips, and the chip is combined with external circuit
Effectively raise the stability and reliability of output voltage and electric current of the present invention.
Brief description of the drawings
Fig. 1 is the overall structure diagram of the present invention.
Fig. 2 is the electrical block diagram of the comparison amplifying circuit of the present invention.
Fig. 3 is the electrical block diagram of the short-circuit protective circuit of voltage regulation of the present invention.
Embodiment
The present invention is described in further detail with reference to embodiment and its accompanying drawing, but embodiments of the present invention are not
It is limited to this.
Embodiment
As shown in figure 1, the present invention is mainly by control chip U2, transformer T, short-circuit protective circuit of voltage regulation, diode rectification
Device U1, polar capacitor C1, polar capacitor C2, voltage-regulator diode D1, compare amplifying circuit, phase adjusting circuit, and voltage and adjust
Manage output circuit composition.
During connection, polar capacitor C1 positive pole is connected with diode rectifier U1 cathode output end, its negative pole and two
Pole pipe rectifier U1 cathode output end is connected.Polar capacitor C2 positive pole is connected with polar capacitor C1 positive pole, negative pole
Negative pole with polar capacitor C1 after resistance R1 is connected.Voltage-regulator diode D1 N poles are connected with control chip U2 VIN pins
Connect, its P pole is connected with diode rectifier U1 cathode output end.Phase adjusting circuit is connected with control chip U2.Electricity
Pressure conditioning output circuit is connected with control chip U2 and diode rectifier U1 respectively.Short-circuit protective circuit of voltage regulation respectively with arteries and veins
Adjustment circuit is rushed with voltage conditioning output circuit to be connected.Compare PWM pins and electricity that amplifying circuit is serially connected in control chip U2
Between pressure conditioning output circuit.
The Same Name of Ends of the transformer T secondary inductance coils is connected with diode rectifier U1 one of input
Connect, its non-same polarity is connected with diode rectifier U1 another input；Control chip U2 GND pins ground connection；Institute
The Same Name of Ends and non-same polarity for stating transformer T primary side inductance coils are connected with external power source respectively.
Wherein, the phase adjusting circuit is by triode VT1, triode VT2, resistance R2, resistance R3, resistance R4, resistance
R5, resistance R6, resistance R7, polar capacitor C3, polar capacitor C4, polar capacitor C5, diode D2, and diode D3 compositions.
During connection, polar capacitor C3 positive pole is connected after resistance R1 with control chip U2 SS pins, its negative pole with
Triode VT1 emitter stage is connected.Diode D2 P poles are connected with control chip U2 SIN pins, its N pole and three poles
Pipe VT1 colelctor electrode is connected.Polar capacitor C4 positive pole is connected after resistance R4 with control chip U2 COC pins, it
Emitter stage of the negative pole with triode VT1 after resistance R3 is connected.Polar capacitor C5 negative pole and control chip U2 FC pins
It is connected, colelctor electrode of its positive pole with triode VT2 after resistance R5 is connected.Diode D3 N poles after resistance R7 with control
Coremaking piece U2 CR pins are connected, its emitter stage of P poles with triode VT2 after resistance R6 is connected.
The N poles of the diode D3 are connected with control chip U2 SHDN pins, its P pole and triode VT101 hair
Emitter-base bandgap grading is connected；The base stage of the triode VT2 is connected with triode VT1 base stage, its emitter stage is with polar capacitor C4's
Negative pole is grounded after being connected；The positive pole of the polar capacitor C4 is connected with triode VT1 base stage.
Further, the voltage conditioning output circuit is by FET MOS, triode VT3, resistance R8, resistance R9, electricity
Hinder R10, resistance R11, adjustable resistance R12, polar capacitor C6, polar capacitor C7, polar capacitor C8, diode D4, and inductance
L2 is formed.
During connection, polar capacitor C6 positive pole is connected after resistance R8 with triode VT3 emitter stage, its negative pole and two
Pole pipe rectifier U1 cathode output end is connected.Adjustable resistance R12 one end is connected, separately with FET MOS drain electrode
One end is connected with voltage stabilizing chip U101OUT pins.Inductance L2 one end is connected with polar capacitor C6 positive pole, its other end
It is connected with voltage stabilizing chip U101 OUT pins.
Meanwhile diode D4 N poles are connected after resistance R10 with FET MOS source electrode, its P pole and triode
VT3 base stage is connected.Polar capacitor C7 negative pole is connected with triode VT3 colelctor electrode, its positive pole and FET MOS
Grid be connected.Polar capacitor C8 positive pole is sequentially connected after resistance R9 and inductance L1 with control chip U2 FB pins
Connect, its negative pole is connected after resistance R11 with adjustable resistance R12 adjustable end.
The grid of the FET MOS respectively with control chip U2 VOUT pins and voltage-regulator diode D8 N poles phase
Connection, its drain electrode and voltage stabilizing chip U101 OUT pins be collectively forming voltage nurse one's health output circuit output end and with LED phase
Connection.
As shown in Fig. 2 the relatively amplifying circuit is by triode VT4, triode VT5, triode VT6, resistance R13, electricity
Hinder R14, resistance R15, resistance R16, resistance R17, resistance R18, resistance R19, resistance R20, resistance R21, resistance R22, polarity electricity
Hold C9, polar capacitor C10, polar capacitor C11, polar capacitor C12, polar capacitor C13, diode D6, diode D7, Yi Jiwen
Press diode D8 compositions.
During connection, polar capacitor C9 positive pole is connected after resistance R14 with triode VT4 base stage, its negative pole conduct
Compare the input of amplifying circuit and be connected with control chip U2 PWM pins.Diode D6 P poles after resistance R13 with
Polar capacitor C9 positive pole is connected, its colelctor electrode of N poles with triode VT4 after resistance R18 is connected.Polar capacitor C10
Positive pole be connected after resistance R15 with polar capacitor C9 positive pole, its negative pole ground connection.Polar capacitor C11 negative pole and three poles
Pipe VT6 base stage is connected, its positive pole is connected with triode VT4 colelctor electrode.
Wherein, diode D7 N poles be connected with triode VT5 base stage, its P pole after resistance R17 with triode VT4
Emitter stage be connected.Polar capacitor C12 positive pole is connected after resistance R16 with triode VT4 emitter stage, its negative pole with
Triode VT5 emitter stage is grounded after being connected.Emitter stage of the polar capacitor C13 positive pole after resistance R21 with triode VT6
It is connected, emitter stage of its negative pole with triode VT5 after resistance R20 is connected.Resistance R19 one end and diode D6 N
Pole is connected, its other end is connected with triode VT6 colelctor electrode.
Meanwhile voltage-regulator diode D8 P poles are connected with triode VT6 colelctor electrode, its N pole is after adjustable resistance R22
It is connected with polar capacitor C13 negative pole.The colelctor electrode of the triode VT5 is connected with triode VT6 emitter stage；It is described
Voltage-regulator diode D8 N poles are connected as the output end for comparing amplifying circuit and with voltage conditioning output circuit.
As shown in figure 3, the short-circuit protective circuit of voltage regulation is by voltage stabilizing chip U101, triode VT101, triode VT102,
Resistance R101, resistance R102, adjustable resistance R103, resistance R104, resistance R105, polar capacitor C101, polar capacitor C102, pole
Property electric capacity C103, and diode D101 composition.
During connection, resistance R101 one end is connected with triode VT101 emitter stage, the other end and voltage stabilizing chip U101
IN pins be connected.Polar capacitor C101 positive pole is connected with triode VT101 colelctor electrode, negative pole ground connection.Resistance
R102 one end is connected with triode VT101 emitter stage, the other end is connected with triode VT102 colelctor electrode.Two poles
Pipe D101 P poles are connected with triode VT101 base stage, N poles are connected with triode VT102 base stage.
Wherein, polar capacitor C102 positive pole be connected with triode VT102 base stage, negative pole after resistance R104 with it is steady
Pressure chip U101 GND pins are connected.Hair of the polar capacitor C103 positive pole after adjustable resistance R103 with triode VT102
Emitter-base bandgap grading is connected, negative pole is connected with voltage stabilizing chip U101 OUT pins.Resistance R105 one end is negative with polar capacitor C103's
Pole is connected, the other end is grounded.
The emitter stage of the triode VT101 is connected with phase adjusting circuit, triode VT101 colelctor electrode with it is steady
Pressure chip U101 IN pins are connected；The GND pins ground connection of the voltage stabilizing chip U101, voltage stabilizing chip U101 OUT pipes
Pin is connected with voltage conditioning output circuit.The voltage stabilizing chip U101 then preferentially employs 7805ABT integrated chips to realize.
The circuit operationally, when there is short circuit in this Switching Power Supply and voltage instantaneous raises, resistance R101 and polar capacitor C101 shapes
Into current limiter then can to electric current carry out quickly discharge over the ground, triode VT101 is now in cut-off state, and electric current is through voltage stabilizing
Triode is flowed to by the polar capacitor C103 and adjustable resistance R103 feedback channels formed after chip U101 progress voltage stabilizings
VT102, raise the level on triode VT102 emitter stage, triode VT102 cut-offs, this Switching Power Supply stops output electricity
Pressure, its Switching Power Supply are in power failure state, it is therefore prevented that load is damaged by the voltage.
During operation, the pulse dynamic that the present invention can be to input voltage and electric current is adjusted, and the present invention can also be to defeated
The intensity for going out voltage and current is adjusted.And the short-circuit protective circuit of voltage regulation that the present invention is set can be in the short circuit of this source element
The instant high-voltage or electric current of appearance are suppressed；And the electronics member peripheral with it of the voltage stabilizing chip set by the circuit can be passed through
Part is combined quickly to be depressured to the voltage passed through, while timely blocks this power supply, ensures that output of the present invention
Voltage and current stability, effectively ensure that the stability of light-operated LED (liquid crystal diode) lamp brightness, and improve the use of LED
Life-span.
Meanwhile the present invention can strengthen voltage amplitude and current amplitude, so as to improve output voltage of the present invention and
The accuracy of electric current.The control chip U of the present invention realizes that the chip has overtemperature protection and short circuit using L296 integrated chips
The functions such as protection, and the chip is combined with external circuit and effectively raises the stability of output voltage and electric current of the present invention
And reliability.
According to above-described embodiment, you can realize the present invention well.
Claims (5)
1. a kind of base has the light-operated with short-circuit type voltage regulation Switching Power Supply of voltage adjustment processing, it is characterised in that mainly by control core
Piece U2, transformer T, diode rectifier U1, positive pole is connected with diode rectifier U1 cathode output end, negative pole and two poles
The polar capacitor C1 that pipe rectifier U1 cathode output end is connected, positive pole is connected with polar capacitor C1 positive pole, negative pole warp
Polar capacitor C2, the N pole being connected after resistance R1 with polar capacitor C1 negative pole is connected with control chip U2 VIN pins, P
The voltage-regulator diode D1 that pole is connected with diode rectifier U1 cathode output end, the pulse being connected with control chip U2 are adjusted
Whole circuit, the voltage conditioning output circuit being connected respectively with control chip U2 and diode rectifier U1, is adjusted with pulse respectively
The short-circuit protective circuit of voltage regulation that whole circuit is connected with voltage conditioning output circuit, and it is serially connected in control chip U2 PWM pipes
Comparison amplifying circuit between pin and voltage conditioning output circuit forms；The Same Name of Ends of the transformer T secondary inductance coils with
Diode rectifier U1 one of input is connected, another input of its non-same polarity and diode rectifier U1
It is connected；Control chip U2 GND pins ground connection；
The short-circuit protective circuit of voltage regulation is by voltage stabilizing chip U101, triode VT101, triode VT102, one end and triode
The resistance R101 that VT101 emitter stage is connected, the other end is connected with voltage stabilizing chip U101 IN pins, positive pole and triode
VT101 colelctor electrode is connected, the polar capacitor C101 of negative pole ground connection, and one end is connected, separately with triode VT101 emitter stage
Resistance R102, the P pole that one end is connected with triode VT102 colelctor electrode is connected with triode VT101 base stage, N poles with
The diode D101 that triode VT102 base stage is connected, positive pole is connected with triode VT102 base stage, negative pole is through resistance
The polar capacitor C102 being connected after R104 with voltage stabilizing chip U101 GND pins, positive pole after adjustable resistance R103 with three poles
The polar capacitor C103, Yi Jiyi that pipe VT102 emitter stage is connected, negative pole is connected with voltage stabilizing chip U101 OUT pins
End is connected with polar capacitor C103 negative pole, the resistance R105 compositions of other end ground connection；The emitter stage of the triode VT101
It is connected with phase adjusting circuit, triode VT101 colelctor electrode is connected with voltage stabilizing chip U101 IN pins；It is described steady
Chip U101 GND pins ground connection is pressed, voltage stabilizing chip U101 OUT pins are connected with voltage conditioning output circuit.
2. a kind of base according to claim 1 has the light-operated with short-circuit type voltage regulation Switching Power Supply, its spy of voltage adjustment processing
Sign is, the relatively amplifying circuit by triode VT4, triode VT5, triode VT6, positive pole after resistance R14 with three poles
Pipe VT4 base stage is connected, negative pole is connected as the input for comparing amplifying circuit and with control chip U2 PWM pins
Polar capacitor C9, P pole is connected after resistance R13 with polar capacitor C9 positive pole, N poles after resistance R18 with triode VT4's
The diode D6 that colelctor electrode is connected, positive pole is connected after resistance R15 with polar capacitor C9 positive pole, the polarity of negative pole ground connection
Electric capacity C10, the polar capacitor that negative pole is connected with triode VT6 base stage, positive pole is connected with triode VT4 colelctor electrode
Two poles that C11, N pole are connected with triode VT5 base stage, P poles are connected after resistance R17 with triode VT4 emitter stage
Pipe D7, after positive pole is connected after resistance R16 with triode VT4 emitter stage, negative pole is connected with triode VT5 emitter stage
The polar capacitor C12 of ground connection, positive pole is connected after resistance R21 with triode VT6 emitter stage, negative pole after resistance R20 with
The polar capacitor C13 that triode VT5 emitter stage is connected, one end is connected with diode D6 N poles, the other end and triode
The resistance R19 that VT6 colelctor electrode is connected, and P poles are connected with triode VT6 colelctor electrode, N poles are through adjustable resistance R22
The voltage-regulator diode D8 compositions being connected afterwards with polar capacitor C13 negative pole；The colelctor electrode and triode of the triode VT5
VT6 emitter stage is connected；Nursed one's health as the output end for comparing amplifying circuit and with voltage defeated in the N poles of the voltage-regulator diode D8
Go out circuit to be connected.
3. a kind of base according to claim 2 has the light-operated with short-circuit type voltage regulation Switching Power Supply, its spy of voltage adjustment processing
Sign is that the phase adjusting circuit is managed by triode VT1, triode VT2, positive pole after resistance R1 with control chip U2 SS
Polar capacitor C3, the P pole that pin is connected, negative pole is connected with triode VT1 emitter stage and control chip U2 SIN pin phases
The diode D2 that connection, N poles are connected with triode VT1 colelctor electrode, positive pole are managed after resistance R4 with control chip U2 COC
The polar capacitor C4 that pin is connected, negative pole is connected after resistance R3 with triode VT1 emitter stage, negative pole and control chip U2
FC pins be connected, the polar capacitor C5 that positive pole is connected after resistance R5 with triode VT2 colelctor electrode, and N poles warp
It is connected after resistance R7 with control chip U2 CR pins, two that P poles are connected after resistance R6 with triode VT2 emitter stage
Pole pipe D3 is formed；The N poles of the diode D3 are connected with control chip U2 SHDN pins, its P pole is with triode VT101's
Emitter stage is connected；；The base stage of the triode VT2 is connected with triode VT1 base stage, its emitter stage and polar capacitor C4
Negative pole be connected after be grounded；The positive pole of the polar capacitor C4 is connected with triode VT1 base stage.
4. a kind of base according to claim 3 has the light-operated with short-circuit type voltage regulation Switching Power Supply, its spy of voltage adjustment processing
Sign is, the voltage conditioning output circuit is by FET MOS, triode VT3, positive pole after resistance R8 with triode VT3
Emitter stage be connected, the polar capacitor C6 that negative pole is connected with diode rectifier U1 cathode output end, one end and field are imitated
Should pipe MOS drain electrode be connected, the adjustable resistance R12 that the other end is connected with voltage stabilizing chip U101OUT pins, one end and polarity
Inductance L2, the N pole that electric capacity C6 positive pole is connected, the other end is connected with voltage stabilizing chip U101 OUT pins is after resistance R10
It is connected with FET MOS source electrode, the diode D4 that P poles are connected with triode VT3 base stage, negative pole and triode
The polar capacitor C7 that VT3 colelctor electrode is connected, positive pole is connected with FET MOS grid, and positive pole is sequentially through electricity
It is connected after resistance R9 and inductance L1 with control chip U2 FB pins, adjustable end of the negative pole after resistance R11 with adjustable resistance R12
The polar capacitor C8 compositions being connected；The grid of the FET MOS respectively with control chip U2 VOUT pins and voltage stabilizing
Diode D8 N poles are connected, it drains and voltage stabilizing chip U101 OUT pins are collectively forming the defeated of voltage conditioning output circuit
Go out end.
5. a kind of base according to claim 4 has the light-operated with short-circuit type voltage regulation Switching Power Supply, its spy of voltage adjustment processing
Sign is that the control chip U2 is L296 integrated chips；The voltage stabilizing chip U101 is 7805ABT integrated chips.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711047317.0A CN107682972A (en) | 2017-10-31 | 2017-10-31 | A kind of base has the light-operated with short-circuit type voltage regulation Switching Power Supply of voltage adjustment processing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711047317.0A CN107682972A (en) | 2017-10-31 | 2017-10-31 | A kind of base has the light-operated with short-circuit type voltage regulation Switching Power Supply of voltage adjustment processing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107682972A true CN107682972A (en) | 2018-02-09 |
Family
ID=61141965
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711047317.0A Pending CN107682972A (en) | 2017-10-31 | 2017-10-31 | A kind of base has the light-operated with short-circuit type voltage regulation Switching Power Supply of voltage adjustment processing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107682972A (en) |
-
2017
- 2017-10-31 CN CN201711047317.0A patent/CN107682972A/en active Pending
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Application publication date: 20180209 |