CN105898927A - Energy-saving power supply circuit for surge current limiting type cold-light LED - Google Patents
Energy-saving power supply circuit for surge current limiting type cold-light LED Download PDFInfo
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- CN105898927A CN105898927A CN201610379487.8A CN201610379487A CN105898927A CN 105898927 A CN105898927 A CN 105898927A CN 201610379487 A CN201610379487 A CN 201610379487A CN 105898927 A CN105898927 A CN 105898927A
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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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- 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]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
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Abstract
The invention discloses an energy-saving power supply circuit for a surge current limiting type cold-light LED. The energy-saving power supply circuit is characterized by mainly comprising a control chip U2, a reference current correction circuit, a thyristor trigger circuit, a transformer T, a diode rectifier U1, a polar capacitor C1, a polar capacitor C5, a resistor R9, a polar capacitor C9 which is connected between the non-dotted terminal and the dotted terminal of the secondary side inductive coil of the transformer T in series, a low-pass filtering circuit which is connected between the diode rectifier U1 and the transformer T in series, and a surge current limiting circuit which is connected between the low-pass filtering circuit and the reference current correction circuit in series. According to the energy-saving power supply circuit, the voltage and current at the input end can be filtered, so that the input voltage and cable can be more stable; meanwhile, the intensity of the filtered voltage and current is adjusted, so that the electromagnet wave movement of the current can be kept at a uniform-velocity speed; and therefore, the energy-saving power supply circuit can output stable working current, and the luminance stability of the LED lamp can be ensured.
Description
Technical field
The present invention relates to electric energy-saving field, specifically, be that a kind of surge current restraint-type cold light LED is used
Energy-saving electric power circuit.
Background technology
At present, due to LED have that energy consumption is low, the feature such as length in service life and safety and environmental protection, it is
Become one of main product of people's life lighting.Owing to LED is different from traditional electric filament lamp, therefore
Its needs are driven by special power circuit.But, the power circuit that current LED is used is not
Only being easily subject to the impact of external voltage fluctuations, and its load capacity is poor, output electric current is unstable, from
And cause the brightness instability of LED, power consumption, service life short.
Therefore it provides one can improve load capacity, can ensure that again outputting current steadily, can also drop simultaneously
The LED power circuit of low energy consumption is the task of top priority.
Summary of the invention
It is an object of the invention to overcome LED voltage circuit of the prior art to there is load capacity poor, defeated
Go out the defect that electric current is unstable, it is provided that a kind of surge current restraint-type cold light LED energy-saving electric power circuit.
The present invention is achieved through the following technical solutions: a kind of surge current restraint-type cold light LED is with energy-conservation
Power circuit, mainly by control chip U2, transformator T, diode rectifier U1, negative pole is whole with diode
The cathode output end of stream device U1 is connected, positive pole is connected with the cathode output end of diode rectifier U1
Polar capacitor C1, negative pole is connected with the CS pin of control chip U2, positive pole after inductance L1 with control
The polar capacitor C5 that the RE pin of chip U2 is connected, one end is connected with the positive pole of polar capacitor C5,
The other end be connected with the GND pin of control chip U2 after the resistance R9 of ground connection, be serially connected in transformator T
Polar capacitor C9 between non-same polarity and the Same Name of Ends of secondary inductance coil, is serially connected in control chip U2's
Reference current correcting circuit between VCC pin and VS-pin, is serially connected in diode rectifier U1 and transformation
Low-pass filter circuit between device T, is serially connected in the wave between low-pass filter circuit and reference current correcting circuit
Gush current limit circuit, and it is tactile to be serially connected in the IGCT between control chip U2 and reference current correcting circuit
Power Generation Road forms；Described reference current correcting circuit is connected with thyristor gating circuit.
Described ICLC is by audion VT3, audion VT4, audion VT5, audion
VT6, N pole is sequentially connected through resistance R22 base stage with audion VT5 after resistance R23, P pole is made
For the input of ICLC the diode D6 that is connected with low-pass filter circuit, one end and three
The adjustable resistance R24 that the base stage of pole pipe VT5 is connected, the other end is connected with the colelctor electrode of audion VT5,
Positive pole P pole with diode D6 after critesistor RL is connected, negative pole is sequentially through resistance R18 and resistance
The polar capacitor C10 that after R19, emitter stage with audion VT4 is connected, the base of negative pole and audion VT3
The pole that pole is connected, positive pole is sequentially connected with the N pole of diode D6 after resistance R16 through resistance R17
Property electric capacity C11, one end is connected with the positive pole of polar capacitor C11, the base stage of the other end and audion VT3
The adjustable resistance R20 being connected, positive pole emitter stage with audion VT4 after resistance R25 is connected, negative
Polar capacitor C12, the N pole of pole ground connection is connected with the emitter stage of audion VT6, P pole and polar capacitor
The diode D8 that the negative pole of C12 is connected, one end is connected with the P pole of diode D8, the other end and three
The inductance L2 that the emitter stage of pole pipe VT6 is connected, and P pole after resistance R21 with audion VT3's
The Zener diode D7 composition that base stage is connected, N pole is connected with the emitter stage of audion VT6；Described
The minus earth of polar capacitor C10；The emitter stage of described audion VT3 is connected with the base stage of mythical animals Buddha's warrior attendant 4
Connecing, the colelctor electrode of its audion VT3 is connected all with audion VT5's with the colelctor electrode of audion VT4
Base stage is connected；The colelctor electrode of described audion VT5 is connected with the colelctor electrode of audion VT6, its three pole
The base stage of pipe VT5 is connected with the base stage of audion VT6；The emitter stage of described audion VT6 as
Outfan is also connected with reference current correcting circuit.
Described low-pass filter circuit is by the cathode output end of audion VT1, P pole Yu diode rectifier U1
Be connected, diode D1 that N pole base stage with audion VT1 after adjustable resistance R2 is connected, positive pole
Be connected with the P pole of diode D1, polar capacitor C2 that negative pole is connected with the base stage of audion VT1,
Ground connection after P pole is connected with the positive pole of polar capacitor C2, N pole is connected with the colelctor electrode of audion VT1
Diode D3, one end is connected with the N pole of diode D1, the emitter stage phase of the other end and audion VT1
The resistance R3 connected, and positive pole N pole with diode D1 after resistance R4 is connected, negative pole is through electricity
The polar capacitor C3 composition being connected with the colelctor electrode of audion VT1 after resistance R5；Described audion VT1
Base stage be connected with the P pole of diode D6, its colelctor electrode is connected with thyristor gating circuit.
Described reference current correcting circuit by audion VT2, N pole after resistance R7 with control chip U's
The diode D2 that VCC pin is connected, P pole emitter stage with audion VT2 after resistance R8 is connected,
Positive pole is connected with the colelctor electrode of audion VT2, polar capacitor C4, the P pole of minus earth is through resistance R10
The diode that base stage with audion VT2 is connected afterwards, N pole is connected with the VS pin of control chip U2
D4, and positive pole be sequentially connected through resistance R12 negative pole with polar capacitor C4 after resistance R11, negative
Pole is as the outfan of reference current correcting circuit the polar capacitor C6 group that is connected with thyristor gating circuit
Become；The N pole of described diode D4 is connected with the positive pole of polar capacitor C6；The N of described diode D2
Pole is connected with the emitter stage of audion VT6.
Described thyristor gating circuit is by field effect transistor MOS1, field effect transistor MOS2, one end and control core
The resistance R13 that the LO pin of sheet U2 is connected, the other end is connected with the grid of field effect transistor MOS2,
Negative pole grid with field effect transistor MOS2 after resistance R15 is connected, the transmitting of positive pole and audion VT1
The polar capacitor C8 that pole is connected, negative pole is connected with the grid of field effect transistor MOS1, positive pole is through resistance
The polar capacitor C7 being connected with the HC pin of control chip U2 after R6, one end and field effect transistor MOS1
The resistance R14 that source electrode is connected, the other end is connected with the VS+ pin of control chip U2, and P pole
Be connected with the source electrode of field effect transistor MOS2, the non-same polarity of the former limit inductance coil of N pole and transformator T
The diode D5 composition being connected；The grounded drain of described field effect transistor MOS2, its grid and polar capacitor
The negative pole of C6 is connected, and its source electrode is connected with the source electrode of field effect transistor MOS1；Described field effect transistor MOS1
The drain electrode Same Name of Ends of limit former with transformator T inductance coil respectively and the emitter stage of audion VT1 be connected.
For the practical effect of the present invention, described control chip U2 the most preferentially uses the integrated core of L6569
Sheet realizes.
The present invention compared with prior art, has the following advantages and beneficial effect:
(1) input terminal voltage electric current can be filtered processing by the present invention, and the voltage x current making input is more steady,
The intensity of the voltage x current after Filtering Processing the most of the present invention is adjusted, and makes the motion of the electromagnetic wave of electric current protect
Hold at the uniform velocity state, thus enable the invention to export stable operating current, it is ensured that stablizing of LED brightness
Property.
(2) surge current in input electric current can be limited by the present invention, effectively prevents input current
Instantaneous high current occurs, thus effectively raises the stability of the output electric current of the present invention.
(3) present invention employs the integrated chip of high-precision L6569, it is strong, overheated that this chip has stability
The functions such as protection, overcurrent protection, effectively raise the stability of the output electric current of the present invention.
(4) service life that can effectively extend LED of the present invention, the electricity of more than 50% can be saved simultaneously,
Thus meet people to LED control system in the demand of energy-conservation aspect.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of the present invention.
Fig. 2 is the electrical block diagram of the ICLC of the present invention.
Detailed description of the invention
Below in conjunction with embodiment and accompanying drawing thereof, the present invention is described in further detail, but the enforcement of the present invention
Mode is not limited to this.
Embodiment
As it is shown in figure 1, the present invention is mainly by control chip U2, transformator T, diode rectifier U1,
Polar capacitor C1, polar capacitor C5, polar capacitor C9, inductance L1, ICLC, brilliant lock
Pipe triggers circuit, reference current correcting circuit, and low-pass filter circuit composition.
During enforcement, the negative pole of polar capacitor C1 is connected with the cathode output end of diode rectifier U1, it
Positive pole is connected with the cathode output end of diode rectifier U1.The negative pole of polar capacitor C5 and control chip
The CS pin of U2 is connected, its positive pole RE pin with control chip U2 after inductance L1 is connected.
One end of resistance R9 is connected with the positive pole of polar capacitor C5, the GND of the other end and control chip U2 pipe
Foot be connected after ground connection.Polar capacitor C9 is serially connected in the non-same polarity of transformator T secondary inductance coil with of the same name
Between end.Reference current correcting circuit is serially connected between the VCC pin of control chip U2 and VS-pin.
Thyristor gating circuit is serially connected between control chip U2 and reference current correcting circuit.Low-pass filter circuit string
It is connected between diode rectifier U1 and transformator T.
Described reference current correcting circuit is connected with low-pass filter circuit and thyristor gating circuit respectively.Institute
The Same Name of Ends of the secondary inductance coil stating transformator T is connected with LED group respectively with non-same polarity.Described
The input of diode rectifier U1 is connected with power supply.
Wherein, described low-pass filter circuit by audion VT1, resistance R1, adjustable resistance R2, resistance R3,
Resistance R4, resistance R5, polar capacitor C3, diode D1, and diode D3 form.
During connection, the P pole of diode D1 is connected with the cathode output end of diode rectifier U1, its N
Pole base stage with audion VT1 after adjustable resistance R2 is connected.The positive pole of polar capacitor C2 and diode
The P pole of D1 is connected, its negative pole is connected with the base stage of audion VT1.The P pole of diode D3 and pole
Ground connection after the positive pole of property electric capacity C2 is connected, its N pole is connected with the colelctor electrode of audion VT1.
Meanwhile, one end of resistance R3 be connected with the N pole of diode D1, its other end and audion VT1
Emitter stage be connected.The positive pole of polar capacitor C3 N pole with diode D1 after resistance R4 is connected,
Its negative pole colelctor electrode with audion VT1 after resistance R5 is connected.The base stage of described audion VT1 with
The P pole of diode D6 is connected, and its colelctor electrode is connected with thyristor gating circuit.
Further, described reference current correcting circuit is by audion VT2, resistance R7, resistance R8, electricity
Resistance R10, resistance R11, resistance R12, polar capacitor C4, polar capacitor C6, diode D2, and
Diode D4 forms.
During connection, the N pole of diode D2 VCC pin with control chip U after resistance R7 is connected,
Its P pole emitter stage with audion VT2 after resistance R8 is connected.The positive pole of polar capacitor C4 and three poles
The colelctor electrode of pipe VT2 is connected, its minus earth.The P pole of diode D4 after resistance R10 with three poles
The base stage of pipe VT2 is connected, its N pole is connected with the VS pin of control chip U2.Polar capacitor C6
Positive pole be sequentially connected through resistance R12 negative pole with polar capacitor C4 after resistance R11, its negative pole is made
On the basis of the outfan of current correction circuit being connected with thyristor gating circuit.The N of described diode D4
Pole is connected with the positive pole of polar capacitor C6；The N pole of described diode D2 and the transmitting of audion VT6
Pole is connected.
Further, described thyristor gating circuit by field effect transistor MOS1, field effect transistor MOS2,
Resistance R6, resistance R13, resistance R14, resistance R15, polar capacitor C8, and Zener diode D5
Composition.
During connection, one end of resistance R13 is connected with the LO pin of control chip U2, its other end with
The grid of field effect transistor MOS2 is connected.The negative pole of polar capacitor C8 after resistance R15 with field effect transistor
The grid of MOS2 is connected, its positive pole is connected with the emitter stage of audion VT1.Polar capacitor C7's is negative
Pole is connected with the grid of field effect transistor MOS1, its positive pole after resistance R6 with the HC of control chip U2
Pin is connected.One end of resistance R14 is connected with the source electrode of field effect transistor MOS1, its other end and control
The VS+ pin of coremaking sheet U2 is connected.The P pole of diode D5 is connected with the source electrode of field effect transistor MOS2
Connect, its N pole is connected with the non-same polarity of the former limit inductance coil of transformator T.
The grounded drain of described field effect transistor MOS2, its grid is connected with the negative pole of polar capacitor C6,
Its source electrode is connected with the source electrode of field effect transistor MOS1；The drain electrode of described field effect transistor MOS1 respectively with change
The Same Name of Ends of depressor T former limit inductance coil is connected with the emitter stage of audion VT1.
As in figure 2 it is shown, described ICLC is by audion VT3, audion VT4, audion
VT5, audion VT6, critesistor RL, resistance R16, resistance R17, resistance R18, resistance R19,
Adjustable resistance R20, resistance R21, resistance R22, resistance R23, adjustable resistance R24, resistance R25, pole
Property electric capacity C10, polar capacitor C11, polar capacitor C12, diode D6, Zener diode D7, two poles
Pipe D8, and inductance L2 composition.
During connection, the N pole of diode D6 sequentially after resistance R22 and resistance R23 with audion VT5
Base stage be connected, its P pole as the input of ICLC and is connected with low-pass filter circuit
Connect.One end of adjustable resistance R24 is connected with the base stage of audion VT5, its other end and audion VT5
Colelctor electrode be connected.The positive pole of polar capacitor C10 after critesistor RL with the P pole phase of diode D6
Connect, its negative pole is sequentially connected through resistance R18 emitter stage with audion VT4 after resistance R19.Pole
The property negative pole of electric capacity C11 is connected with the base stage of audion VT3, its positive pole is sequentially through resistance R17 and resistance
After R16, the N pole with diode D6 is connected.
Meanwhile, one end of adjustable resistance R20 be connected with the positive pole of polar capacitor C11, its other end and three
The base stage of pole pipe VT3 is connected.The positive pole of polar capacitor C12 after resistance R25 with audion VT4's
Emitter stage is connected, its minus earth.The N pole of diode D8 is connected with the emitter stage of audion VT6,
Its P pole is connected with the negative pole of polar capacitor C12.One end of inductance L2 is extremely connected with the P of diode D8
Connect, its other end is connected with the emitter stage of audion VT6.The P pole of Zener diode D7 is through resistance R21
Base stage with audion VT3 is connected afterwards, its N pole is connected with the emitter stage of audion VT6.
The minus earth of described polar capacitor C10；The emitter stage of described audion VT3 and mythical animals Buddha's warrior attendant 4
Base stage be connected, the colelctor electrode of its audion VT3 be connected with the colelctor electrode of audion VT4 all with three poles
The base stage of pipe VT5 is connected；The colelctor electrode of described audion VT5 is connected with the colelctor electrode of audion VT6
Connecing, the base stage of its audion VT5 is connected with the base stage of audion VT6；Described audion VT6 sends out
Emitter-base bandgap grading as outfan and be connected with reference current correcting circuit.
During operation, input terminal voltage electric current can be filtered processing by the present invention, makes the voltage x current of input more
Steadily, the intensity of the voltage x current after Filtering Processing the most of the present invention is adjusted, and makes the electromagnetic wave of electric current
Motion remains a constant speed state, and the surge current in input electric current can also be limited, effectively by the present invention
The input current that prevents instantaneous high current occurs, thus enable the invention to export stable operating current, it is ensured that
The stability of the brightness of LED etc..
Present invention employs the integrated chip of high-precision L6569, this chip has that stability is strong, overtemperature protection,
The functions such as overcurrent protection, effectively raise the stability of the output electric current of the present invention.The present invention can have
In the service life of the prolongation LED of effect, the electricity of more than 50% can be saved simultaneously, thus meet people to LED
Lamp control system is in the demand of energy-conservation aspect.
According to above-described embodiment, can well realize the present invention.
Claims (6)
1. a surge current restraint-type cold light LED energy-saving electric power circuit, it is characterised in that mainly by
Control chip U2, transformator T, diode rectifier U1, negative pole is defeated with the positive pole of diode rectifier U1
Go out the polar capacitor C1 that end is connected, positive pole is connected with the cathode output end of diode rectifier U1, negative
Pole is connected with the CS pin of control chip U2, positive pole is managed with the RE of control chip U2 after inductance L1
The polar capacitor C5 that foot is connected, one end is connected with the positive pole of polar capacitor C5, the other end and control core
The GND pin of sheet U2 be connected after the resistance R9 of ground connection, be serially connected in the non-of transformator T secondary inductance coil
Polar capacitor C9 between Same Name of Ends and Same Name of Ends, the VCC pin being serially connected in control chip U2 is managed with VS-
Reference current correcting circuit between foot, is serially connected in the low pass filtered between diode rectifier U1 and transformator T
Wave circuit, is serially connected in the ICLC between low-pass filter circuit and reference current correcting circuit,
And the thyristor gating circuit composition being serially connected between control chip U2 and reference current correcting circuit；Described
Reference current correcting circuit is connected with thyristor gating circuit.
A kind of surge current restraint-type cold light LED energy-saving electric power circuit the most according to claim 1,
It is characterized in that, described ICLC by audion VT3, audion VT4, audion VT5,
Audion VT6, N pole is sequentially connected through resistance R22 base stage with audion VT5 after resistance R23,
P pole as the input of ICLC the diode D6 that is connected with low-pass filter circuit, one
The adjustable electric that end is connected with the base stage of audion VT5, the other end is connected with the colelctor electrode of audion VT5
Resistance R24, positive pole P pole with diode D6 after critesistor RL is connected, negative pole is sequentially through resistance R18
The polar capacitor C10 being connected with emitter stage with audion VT4 after resistance R19, negative pole and audion VT3
Base stage be connected, positive pole is sequentially connected through resistance R17 N pole with diode D6 after resistance R16
Polar capacitor C11, one end is connected with the positive pole of polar capacitor C11, the other end and audion VT3
The adjustable resistance R20 that base stage is connected, positive pole emitter stage with audion VT4 after resistance R25 is connected,
Polar capacitor C12, the N pole of minus earth is connected with the emitter stage of audion VT6, P pole is electric with polarity
Hold the diode D8 that is connected of negative pole of C12, one end is connected with the P pole of diode D8, the other end and
The inductance L2 that the emitter stage of audion VT6 is connected, and P pole after resistance R21 with audion VT3
The Zener diode D7 that base stage is connected, N pole is connected with the emitter stage of audion VT6 composition；Institute
State the minus earth of polar capacitor C10；The emitter stage of described audion VT3 and the base stage phase of mythical animals Buddha's warrior attendant 4
Connect, the colelctor electrode of its audion VT3 be connected with the colelctor electrode of audion VT4 all with audion VT5
Base stage be connected；The colelctor electrode of described audion VT5 is connected with the colelctor electrode of audion VT6, and they are three years old
The base stage of pole pipe VT5 is connected with the base stage of audion VT6；The emitter stage conduct of described audion VT6
Outfan and be connected with reference current correcting circuit.
A kind of surge current restraint-type cold light LED energy-saving electric power circuit the most according to claim 2,
It is characterized in that, described low-pass filter circuit is by the positive pole of audion VT1, P pole Yu diode rectifier U1
The diode D1 that outfan is connected, N pole base stage with audion VT1 after adjustable resistance R2 is connected,
The polar capacitor that positive pole is connected with the P pole of diode D1, negative pole is connected with the base stage of audion VT1
After C2, P pole is connected with the positive pole of polar capacitor C2, N pole is connected with the colelctor electrode of audion VT1
The diode D3 of ground connection, one end is connected with the N pole of diode D1, the other end is sent out with audion VT1's
The resistance R3 that emitter-base bandgap grading is connected, and positive pole N pole with diode D1 after resistance R4 be connected, negative
The polar capacitor C3 composition that pole colelctor electrode with audion VT1 after resistance R5 is connected；Described audion
The base stage of VT1 is connected with the P pole of diode D6, and its colelctor electrode is connected with thyristor gating circuit.
A kind of surge current restraint-type cold light LED energy-saving electric power circuit the most according to claim 3,
It is characterized in that, described reference current correcting circuit by audion VT2, N pole after resistance R7 with control core
The VCC pin of sheet U is connected, P pole emitter stage with audion VT2 after resistance R8 is connected two
Pole pipe D2, positive pole is connected with the colelctor electrode of audion VT2, polar capacitor C4, the P pole of minus earth
After resistance R10 the base stage with audion VT2 be connected, the VS pin phase of N pole and control chip U2
The diode D4 connected, and positive pole sequentially negative with polar capacitor C4 after resistance R12 and resistance R11
Pole is connected, negative pole as the outfan of reference current correcting circuit and is connected with thyristor gating circuit
Polar capacitor C6 forms；The N pole of described diode D4 is connected with the positive pole of polar capacitor C6；Described
The N pole of diode D2 is connected with the emitter stage of audion VT6.
A kind of surge current restraint-type cold light LED energy-saving electric power circuit the most according to claim 4,
It is characterized in that, described thyristor gating circuit by field effect transistor MOS1, field effect transistor MOS2, one end with
The resistance that LO pin is connected, the other end is connected with the grid of field effect transistor MOS2 of control chip U2
R13, negative pole grid with field effect transistor MOS2 after resistance R15 is connected, positive pole and audion VT1
The polar capacitor C8 that is connected of emitter stage, negative pole is connected with the grid of field effect transistor MOS1, positive pole warp
The polar capacitor C7 being connected with the HC pin of control chip U2 after resistance R6, one end and field effect transistor
The resistance R14 that the source electrode of MOS1 is connected, the other end is connected with the VS+ pin of control chip U2, with
And P pole is connected with the source electrode of field effect transistor MOS2, N pole is non-with the former limit inductance coil of transformator T
The diode D5 composition that Same Name of Ends is connected；The grounded drain of described field effect transistor MOS2, its grid and pole
The negative pole of property electric capacity C6 is connected, and its source electrode is connected with the source electrode of field effect transistor MOS1；Described field effect
The Same Name of Ends of the drain electrode of pipe MOS1 limit former with transformator T inductance coil respectively and the emitter stage of audion VT1
It is connected.
A kind of surge current restraint-type cold light LED energy-saving electric power circuit the most according to claim 5,
It is characterized in that, described control chip U2 is the integrated chip of L6569.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610379487.8A CN105898927A (en) | 2016-05-30 | 2016-05-30 | Energy-saving power supply circuit for surge current limiting type cold-light LED |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610379487.8A CN105898927A (en) | 2016-05-30 | 2016-05-30 | Energy-saving power supply circuit for surge current limiting type cold-light LED |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105898927A true CN105898927A (en) | 2016-08-24 |
Family
ID=56710415
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610379487.8A Pending CN105898927A (en) | 2016-05-30 | 2016-05-30 | Energy-saving power supply circuit for surge current limiting type cold-light LED |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105898927A (en) |
-
2016
- 2016-05-30 CN CN201610379487.8A patent/CN105898927A/en active Pending
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Application publication date: 20160824 |