CN106211439A - A kind of LED power supply based on pulse current-limiting circuit - Google Patents
A kind of LED power supply based on pulse current-limiting circuit Download PDFInfo
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- CN106211439A CN106211439A CN201610566993.8A CN201610566993A CN106211439A CN 106211439 A CN106211439 A CN 106211439A CN 201610566993 A CN201610566993 A CN 201610566993A CN 106211439 A CN106211439 A CN 106211439A
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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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Abstract
The invention discloses a kind of LED power supply based on pulse current-limiting circuit, it is characterized in that, main by control chip U2, diode rectifier U1, transformator T, audion VT1, Zener diode D9, the voltage-regulating circuit being connected with the COMP pin of control chip U2 and VFB pin and IS pin respectively, constant pressure and flow drive circuit, and the pulse current-limiting circuit composition being serially connected between the Same Name of Ends of constant pressure and flow drive circuit and transformator T former limit inductance coil L2.The high transient state of input voltage and electric current can be adjusted by the present invention, prevents the frequency of electric current from drift occur, makes voltage and current held stationary；And the present invention can carry out over-voltage and over-current regulation to output voltage and circuit, and wave energising pressure in output voltage and the unrestrained galvanization in output electric current can be suppressed, the intensity making output voltage and electric current improves more than 40%, thus effectively raises the load capacity of the present invention.
Description
Technical field
The present invention relates to electronic applications, specifically, be a kind of LED power supply based on pulse current-limiting circuit.
Background technology
Now with the improving constantly of living standard of people, the requirement to the landscaping of life is more and more higher, people
For the living environment made oneself beautiful, just use the LED with various light sources color that indoor are being beautified.So
And, existing LED power supply is easily occurred by extraneous Electromagnetic Interference that output voltage and electric current are unstable, cause light-operated
The brightness of LED is unstable, has had a strong impact on the service life of LED；And existing LED power supply there is also load
The problem of ability.
Stable voltage and current can be exported therefore it provides a kind of, the LED power supply of load capacity can be improved again
It it is the task of top priority.
Summary of the invention
It is an object of the invention to overcome LED electric power output voltage of the prior art and electric current unstable, and
And load capacity difference defect, it is provided that a kind of based on pulse current-limiting circuit LED power supply.
The present invention is achieved through the following technical solutions: a kind of LED power supply based on pulse current-limiting circuit, mainly
By control chip U2, diode rectifier U1, transformator T, audion VT1, P pole after resistance R2 with the base stage of audion VT1
Be connected, Zener diode D1 that N pole is connected with the VCC pin of control chip U2, positive pole is with diode rectifier U1 just
The polar capacitor C1 of ground connection, positive pole after pole outfan is connected, negative pole is connected with the cathode output end of diode rectifier U1
After resistance R1 the cathode output end with diode rectifier U1 be connected, polar capacitor C2, the P pole of minus earth with control core
The diode D2 that the VREF pin of sheet U2 is connected, N pole is connected with the RC pin of control chip U2 after resistance R3, positive pole with
The Same Name of Ends of transformator T secondary inductance coil L3 is connected, negative pole is connected with the non-same polarity of transformator T secondary inductance coil L3
Polar capacitor C11, the P pole connecing rear ground connection is connected with the positive pole of polar capacitor C11, N pole and transformator T secondary inductance coil L3
Non-same polarity be collectively forming the Zener diode D9 of outfan, the non-same polarity of one end and transformator T former limit inductance coil L2
Be connected, the resistance R14 of other end ground connection, be connected with the COMP pin of control chip U2 and VFB pin and IS pin respectively
The voltage-regulating circuit connect, respectively with the colelctor electrode of audion VT1 and the OUT pin of control chip U2 and voltage-regulating circuit
The constant pressure and flow drive circuit being connected, and it is serially connected in constant pressure and flow drive circuit and transformator T former limit inductance coil L2's
Pulse current-limiting circuit composition between Same Name of Ends；Described constant pressure and flow drive circuit also former with transformator T limit inductance coil L1's
Same Name of Ends is connected with non-same polarity；The GND pin ground connection of described control chip U2, its IS pin are connected with RC pin；Institute
The cathode output end of the emitter stage and diode rectifier U1 of stating audion VT1 is connected.
Described pulse current-limiting circuit by audion VT6, audion VT7, positive pole after resistance R20 with the sending out of audion VT6
Polar capacitor C12, the P pole that emitter-base bandgap grading is connected, negative pole is connected with constant pressure and flow drive circuit after resistance R21 with audion
The base stage of VT6 is connected, the diode D11 of N pole ground connection, and negative pole emitter stage with audion VT7 after adjustable resistance R23 is connected
Connect, polar capacitor C13 that positive pole is connected with the P pole of diode D11, negative pole is connected with the colelctor electrode of audion VT7, positive pole
Polar capacitor C14, the P pole being connected with the N pole of diode D11 after resistance R22 is connected with the colelctor electrode of audion VT6, N
The diode D10 that pole emitter stage with audion VT7 after resistance R24 is connected, negative pole is connected with the base stage of audion VT7
Connect, polar capacitor C15, P pole that positive pole is connected with the N of diode D10 after resistance R25 with the positive pole phase of polar capacitor C15
Connect, diode D12 that N pole colelctor electrode with audion VT7 after resistance R26 is connected, and one end is with diode D12's
The adjustable resistance R27 composition that N pole is connected, the other end is connected with the colelctor electrode of audion VT7；The collection of described audion VT7
Electrode ground connection；The Same Name of Ends of limit former with transformator T, the P pole inductance coil L2 of described diode D12 is connected.
Further, described voltage-regulating circuit by audion VT2, audion VT3, P pole after resistance R4 with control core
The diode D3 that the COMP pin of sheet U2 is connected, N pole colelctor electrode with audion VT2 after resistance R is connected, positive pole is through electricity
Be connected with the VFB pin of control chip U2 after resistance R6, the emitter stage of polar capacitor C3, the N pole of minus earth and audion VT3
Be connected, diode D4 that P pole emitter stage with audion VT2 after resistance R8 is connected, the P pole phase of negative pole and diode D4
The polar capacitor C4 that connection, positive pole are connected with the base stage of audion VT2, one end is connected with the positive pole of polar capacitor C3, separately
The resistance R7 that one end is connected with the N pole of diode D4, positive pole is connected with the emitter stage of audion VT2, negative pole is through resistance R9
Polar capacitor C5, the N pole that emitter stage with audion VT3 is connected afterwards is connected with the IS pin of control chip U2, P pole and three
The diode D5 that the emitter stage of pole pipe VT3 is connected, and positive pole base stage with audion VT3 after adjustable resistance R10 is connected
Connect, polar capacitor C6 that negative pole is connected with constant pressure and flow drive circuit composition；The base stage of described audion VT3 and control chip
The RC pin of U2 is connected, its colelctor electrode is connected with the positive pole of polar capacitor C3.
Described constant pressure and flow drive circuit is by audion VT4, audion VT5, field effect transistor MOS, and N pole is after resistance R19
Be connected with the colelctor electrode of audion VT4, diode D8 that P pole negative pole with polar capacitor C12 after resistance R18 is connected,
The adjustable resistance R17 that one end is connected with the P pole of diode D8, the other end is connected with the drain electrode of field effect transistor MOS, negative pole with
The polar capacitor C7 that the emitter stage of audion VT5 is connected, positive pole is connected with the OUT pin of control chip U2, negative pole and pole
The polar capacitor C8, N that the negative pole of property electric capacity C12 is connected, positive pole emitter stage with audion VT5 after resistance R16 is connected
The diode that pole is connected with the grid of field effect transistor MOS, P pole emitter stage with audion VT5 after resistance R15 is connected
D7, polar capacitor C9, the N pole that negative pole is connected with the drain electrode of field effect transistor MOS, positive pole is connected with the base stage of audion VT5
The diode D6 that colelctor electrode with audion VT5 is connected after resistance R13, P pole is connected with the colelctor electrode of audion VT1,
Negative pole source electrode with field effect transistor MOS after resistance R12 is connected, positive pole P pole with diode D6 after resistance R11 is connected
Polar capacitor C10, and one end is connected with the positive pole of polar capacitor C10, the other end and transformator T former limit inductance coil L1
Same Name of Ends be connected inductance L4 composition；The non-same polarity of described transformator T former limit inductance coil L1 also with polar capacitor C10
Positive pole be connected, its Same Name of Ends is connected with the source electrode of field effect transistor MOS；The grounded collector of described audion VT4, its base
Pole is connected with the negative pole of polar capacitor C6, its emitter stage is connected with the negative pole of polar capacitor C7.
For the practical effect of the present invention, described control chip U2 the most preferentially uses the integrated chip of 3S44 to realize.
The present invention compared with prior art, has the following advantages and beneficial effect:
(1) the high transient state of input voltage and electric current can be adjusted by the present invention, prevents the frequency of electric current from drift occur, makes
Voltage and current held stationary, ensures that the present invention can export stable voltage and current；And the present invention can be to output
Voltage and circuit carry out over-voltage and over-current regulation, and can carry out wave energising pressure in output voltage and the unrestrained galvanization in output electric current
Suppression, makes the intensity of output voltage and electric current improve more than 40%, thus effectively raises the load capacity of the present invention.
(2) high surge current produced when powering up can be suppressed by the present invention, and can be by the surge current of output electric current
Being reduced in the range of permission, even if within the inrush current value of electric current is maintained at 0.5～1nA, thus it is defeated to improve the present invention
Go out the stability of voltage and current.
(3) the control chip U2 of the present invention uses the integrated chip of 3S44 to realize, and this chip is tied mutually with external circuit
Close and effectively raise output voltage of the present invention and the stability of electric current and reliability.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of the present invention.
Fig. 2 is the electrical block diagram of the pulse current-limiting circuit 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 embodiments of the present invention are not
It is limited to this.
Embodiment
As it is shown in figure 1, the present invention is mainly by control chip U2, diode rectifier U1, transformator T, audion VT1, P pole
The Zener diode that base stage with audion VT1 is connected after resistance R2, N pole is connected with the VCC pin of control chip U2
D1, positive pole is connected with the cathode output end of diode rectifier U1, the cathode output end phase of negative pole and diode rectifier U1
The polar capacitor C1 of ground connection after connection, positive pole cathode output end with diode rectifier U1 after resistance R1 is connected, negative pole
Polar capacitor C2, the P pole of ground connection is connected with the VREF pin of control chip U2, N pole after resistance R3 with control chip U2's
The diode D2 that RC pin is connected, positive pole is connected with the Same Name of Ends of transformator T secondary inductance coil L3, negative pole and transformator
After the non-same polarity of T secondary inductance coil L3 is connected, polar capacitor C11, the P pole of ground connection is connected with the positive pole of polar capacitor C11
Connect, the non-same polarity of N pole and transformator T secondary inductance coil L3 is collectively forming the Zener diode D9 of outfan, one end and change
The non-same polarity of depressor T former limit inductance coil L2 is connected, the resistance R14 of other end ground connection, respectively with control chip U2's
The voltage-regulating circuit that COMP pin is connected with VFB pin and IS pin, respectively with colelctor electrode and the control of audion VT1
The constant pressure and flow drive circuit that the OUT pin of chip U2 and voltage-regulating circuit are connected, and be serially connected in constant pressure and flow and drive
Pulse current-limiting circuit composition between the Same Name of Ends of galvanic electricity road and transformator T former limit inductance coil L2.
Same Name of Ends and the non-same polarity of described constant pressure and flow drive circuit also former with transformator T limit inductance coil L1 are connected
Connect；The GND pin ground connection of described control chip U2, its IS pin are connected with RC pin；The emitter stage of described audion VT1 with
The cathode output end of diode rectifier U1 is connected；Two inputs of described diode rectifier U1 are collectively forming the present invention
Input and be connected with external power source.For the practical effect of the present invention, described control chip U2 the most preferentially uses
The integrated chip of 3S44 realizes.
Further, described voltage-regulating circuit by audion VT2, audion VT3, resistance R4, resistance R5, resistance R6,
Resistance R7, resistance R8, resistance R9, adjustable resistance R10, polar capacitor C3, polar capacitor C4, polar capacitor C5, polar capacitor C6,
Diode D3, diode D4, and diode D5 form.
During connection, the P pole of diode D3 COMP pin with control chip U2 after resistance R4 is connected, its N pole then warp
After resistance R, the colelctor electrode with audion VT2 is connected.The positive pole of polar capacitor C3 after resistance R6 with the VFB of control chip U2
Pin is connected, its negative pole then ground connection.The N pole of diode D4 is connected with the emitter stage of audion VT3, its P pole is then through resistance
After R8, the emitter stage with audion VT2 is connected.
Wherein, the negative pole of polar capacitor C4 be connected with the P pole of diode D4, its positive pole then with the base stage of audion VT2
It is connected.One end of resistance R7 is connected with the positive pole of polar capacitor C3, its other end is then connected with the N pole of diode D4.
The positive pole of polar capacitor C5 is connected with the emitter stage of audion VT2, its negative pole then after resistance R9 with the transmitting of audion VT3
Pole is connected.
Meanwhile, the N pole of diode D5 be connected with the IS pin of control chip U2, its P pole then with the transmitting of audion VT3
Pole is connected.The positive pole of polar capacitor C6 base stage with audion VT3 after adjustable resistance R10 is connected, its negative pole then with perseverance
Pressure constant-current drive circuit is connected.The base stage of described audion VT3 is connected with the RC pin of control chip U2, its colelctor electrode with
The positive pole of polar capacitor C3 is connected.
Further, described constant pressure and flow drive circuit is by audion VT4, audion VT5, field effect transistor MOS, resistance
R11, resistance R12, resistance R13, resistance R14, resistance R15, resistance R16, adjustable resistance R17, resistance R18, resistance R19, polarity
Electric capacity C7, polar capacitor C8, polar capacitor C9, polar capacitor C10, diode D6, diode D7, diode D8, and inductance
L4 forms.
During connection, the N pole of diode D8 colelctor electrode with audion VT4 after resistance R19 is connected, its P pole is then through electricity
It is connected with the negative pole of polar capacitor C12 after resistance R18.One end of adjustable resistance R17 is connected with the P pole of diode D8, it is another
One end is then connected with the drain electrode of field effect transistor MOS.The negative pole of polar capacitor C7 is connected with the emitter stage of audion VT5, it
Positive pole is then connected with the OUT pin of control chip U2.
Wherein, the negative pole of polar capacitor C8 be connected with the negative pole of polar capacitor C12, its positive pole then after resistance R16 with
The emitter stage of audion VT5 is connected.Diode D7N pole be connected with the grid of field effect transistor MOS, its P pole is then through resistance
After R15, the emitter stage with audion VT5 is connected.The negative pole of polar capacitor C9 is connected with the drain electrode of field effect transistor MOS, its just
Pole then base stage with audion VT5 is connected.
Meanwhile, the N pole of diode D6 colelctor electrode with audion VT5 after resistance R13 be connected, its P pole then with three poles
The colelctor electrode of pipe VT1 is connected.The negative pole of polar capacitor C10 source electrode with field effect transistor MOS after resistance R12 is connected, it
Positive pole then after resistance R11 P pole with diode D6 be connected.One end of inductance L4 is connected with the positive pole of polar capacitor C10,
The Same Name of Ends of its other end then limit inductance coil L1 former with transformator T is connected.
The non-same polarity of described transformator T former limit inductance coil L1 is also connected with the positive pole of polar capacitor C10, it is of the same name
End is connected with the source electrode of field effect transistor MOS；The grounded collector of described audion VT4, its base stage are negative with polar capacitor C6's
Pole is connected, its emitter stage is connected with the negative pole of polar capacitor C7.
As in figure 2 it is shown, described pulse current-limiting circuit is by audion VT6, audion VT7, resistance R20, resistance R21, resistance
R22, adjustable resistance R23, resistance R24, resistance R25, resistance R26, adjustable resistance R27, polar capacitor C12, polar capacitor C13,
Polar capacitor C14, polar capacitor C15, diode D10, diode D11, and diode D12 form.
During connection, the positive pole of polar capacitor C12 emitter stage with audion VT6 after resistance R20 is connected, its negative pole then
It is connected with constant pressure and flow drive circuit.The P pole of diode D11 base stage with audion VT6 after resistance R21 is connected, its N
Pole then ground connection.The negative pole of polar capacitor C13 emitter stage with audion VT7 after adjustable resistance R23 is connected, its positive pole then with
The P pole of diode D11 is connected.
Wherein, the negative pole of polar capacitor C14 be connected with the colelctor electrode of audion VT7, its positive pole then after resistance R22 with
The N pole of diode D11 is connected.The P pole of diode D10 is connected with the colelctor electrode of audion VT6, its N pole is then through resistance R24
Emitter stage with audion VT7 is connected afterwards.The negative pole of polar capacitor C15 is connected with the base stage of audion VT7, its positive pole then
It is connected with the N of diode D10.
Meanwhile, the P pole of diode D12 positive pole with polar capacitor C15 after resistance R25 is connected, its N pole is then through resistance
After R26, the colelctor electrode with audion VT7 is connected.One end of adjustable resistance R27 is connected with the N pole of diode D12, its another
End then colelctor electrode with audion VT7 is connected.The grounded collector of described audion VT7；The P pole of described diode D12 with
The Same Name of Ends of transformator T former limit inductance coil L2 is connected.
During operation, the high transient state of input voltage and electric current can be adjusted by the present invention, prevents the frequency of electric current from drift occur
Move, make voltage and current held stationary, ensure that the present invention can export stable voltage and current；And the present invention can be right
Output voltage and circuit carry out over-voltage and over-current regulation, and can be to wave energising pressure in output voltage and the unrestrained galvanization in output electric current
Suppress, make the intensity of output voltage and electric current improve more than 40%, thus effectively raise the load energy of the present invention
Power.
Meanwhile, the high surge current produced when powering up can be suppressed by the present invention, and can be by the surge electricity of output electric current
Stream is reduced to, in the range of permission, even if within the inrush current value of electric current is maintained at 0.5～1nA, thus improve the present invention
Output voltage and the stability of electric current.The control chip U2 of the present invention uses the integrated chip of 3S44 to realize, and this chip with
External circuit combines and effectively raises stability and the reliability of output voltage of the present invention and electric current.
According to above-described embodiment, can well realize the present invention.
Claims (5)
1. a LED power supply based on pulse current-limiting circuit, it is characterised in that main by control chip U2, diode
Commutator U1, transformator T, audion VT1, P pole base stage with audion VT1 after resistance R2 is connected, N pole and control chip
The Zener diode D1 that the VCC pin of U2 is connected, positive pole is connected with the cathode output end of diode rectifier U1, negative pole with
The cathode output end of diode rectifier U1 be connected after the polar capacitor C1 of ground connection, positive pole after resistance R1 with diode rectification
The cathode output end of device U1 is connected, polar capacitor C2, the P pole of minus earth is connected with the VREF pin of control chip U2, N
The diode D2 that pole is connected with the RC pin of control chip U2 after resistance R3, positive pole and transformator T secondary inductance coil L3
Same Name of Ends be connected, negative pole be connected with the non-same polarity of transformator T secondary inductance coil L3 after the polar capacitor of ground connection
C11, P pole is connected with the positive pole of polar capacitor C11, N pole is collectively forming with the non-same polarity of transformator T secondary inductance coil L3
The Zener diode D9 of outfan, the non-same polarity of limit former with transformator T, one end inductance coil L2 is connected, other end ground connection
Resistance R14, the voltage-regulating circuit being connected with the COMP pin of control chip U2 and VFB pin and IS pin respectively, point
The constant pressure and flow not being connected with the colelctor electrode of audion VT1 and the OUT pin of control chip U2 and voltage-regulating circuit drives
Galvanic electricity road, and the pulse limit being serially connected between the Same Name of Ends of constant pressure and flow drive circuit and transformator T former limit inductance coil L2
Current circuit forms；The Same Name of Ends of described constant pressure and flow drive circuit also former with transformator T limit inductance coil L1 and non-same polarity phase
Connect；The GND pin ground connection of described control chip U2, its IS pin are connected with RC pin；The emitter stage of described audion VT1
It is connected with the cathode output end of diode rectifier U1.
A kind of LED power supply based on pulse current-limiting circuit the most according to claim 1, it is characterised in that described
Pulse current-limiting circuit is by audion VT6, and audion VT7, positive pole emitter stage with audion VT6 after resistance R20 is connected, negative
Polar capacitor C12, the P pole that pole is connected with constant pressure and flow drive circuit base stage with audion VT6 after resistance R21 is connected
Connect, the diode D11 of N pole ground connection, negative pole emitter stage with audion VT7 after adjustable resistance R23 is connected, positive pole and two poles
The polar capacitor C13 that the P pole of pipe D11 is connected, negative pole is connected with the colelctor electrode of audion VT7, positive pole after resistance R22 with
Polar capacitor C14, the P pole that the N pole of diode D11 is connected is connected with the colelctor electrode of audion VT6, N pole is after resistance R24
The diode D10 being connected with the emitter stage of audion VT7, negative pole is connected with the base stage of audion VT7, positive pole and diode
Polar capacitor C15, the P pole that the N of D10 is connected positive pole with polar capacitor C15 after resistance R25 is connected, N pole is through resistance
The diode D12 that after R26, colelctor electrode with audion VT7 is connected, and one end is connected with the N pole of diode D12, another
The adjustable resistance R27 composition that end is connected with the colelctor electrode of audion VT7；The grounded collector of described audion VT7；Described two
The Same Name of Ends of limit former with transformator T, the P pole inductance coil L2 of pole pipe D12 is connected.
A kind of LED power supply based on pulse current-limiting circuit the most according to claim 2, it is characterised in that described
Voltage-regulating circuit is by audion VT2, and audion VT3, P pole COMP pin with control chip U2 after resistance R4 is connected, N
The diode D3 that pole colelctor electrode with audion VT2 after resistance R is connected, positive pole after resistance R6 with control chip U2's
VFB pin is connected, polar capacitor C3, the N pole of minus earth is connected with the emitter stage of audion VT3, P pole is after resistance R8
The diode D4 being connected with the emitter stage of audion VT2, negative pole is connected with the P pole of diode D4, positive pole and audion VT2
The polar capacitor C4 that is connected of base stage, one end is connected with the positive pole of polar capacitor C3, the N pole phase of the other end and diode D4
The resistance R7 connected, positive pole is connected with the emitter stage of audion VT2, negative pole after resistance R9 with the emitter stage of audion VT3
Polar capacitor C5, the N pole being connected is connected with the IS pin of control chip U2, P pole is connected with the emitter stage of audion VT3
Diode D5, and positive pole base stage with audion VT3 after adjustable resistance R10 is connected, negative pole drives with constant pressure and flow
The polar capacitor C6 composition that circuit is connected；The base stage of described audion VT3 is connected with the RC pin of control chip U2, its collection
Electrode is connected with the positive pole of polar capacitor C3.
A kind of LED power supply based on pulse current-limiting circuit the most according to claim 3, it is characterised in that described
Constant pressure and flow drive circuit by audion VT4, audion VT5, field effect transistor MOS, N pole after resistance R19 with audion VT4's
The diode D8 that colelctor electrode is connected, P pole negative pole with polar capacitor C12 after resistance R18 is connected, one end and diode D8
The adjustable resistance R17 that P pole is connected, the other end is connected with the drain electrode of field effect transistor MOS, negative pole and audion VT5 send out
The polar capacitor C7 that emitter-base bandgap grading is connected, positive pole is connected with the OUT pin of control chip U2, negative pole is negative with polar capacitor C12's
Pole is connected, positive pole emitter stage with audion VT5 after resistance R16 is connected polar capacitor C8, N pole and field effect transistor
The diode D7 that the grid of MOS is connected, P pole emitter stage with audion VT5 after resistance R15 is connected, negative pole is imitated with field
Should polar capacitor C9, the N pole that drain electrode is connected, positive pole is connected with the base stage of audion VT5 of pipe MOS after resistance R13 with
The diode D6 that the colelctor electrode of audion VT5 is connected, P pole is connected with the colelctor electrode of audion VT1, negative pole is through resistance R12
Be connected with the source electrode of field effect transistor MOS afterwards, polar capacitor that positive pole is connected with the P pole of diode D6 after resistance R11
C10, and one end is connected with the positive pole of polar capacitor C10, the Same Name of Ends phase of the other end and transformator T former limit inductance coil L1
The inductance L4 composition connected；The non-same polarity of described transformator T former limit inductance coil L1 also positive pole with polar capacitor C10 is connected
Connect, its Same Name of Ends is connected with the source electrode of field effect transistor MOS；The grounded collector of described audion VT4, its base stage and polarity electricity
The negative pole of appearance C6 is connected, its emitter stage is connected with the negative pole of polar capacitor C7.
A kind of LED power supply based on pulse current-limiting circuit the most according to claim 4, it is characterised in that described
Control chip U2 is the integrated chip of 3S44.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610566993.8A CN106211439A (en) | 2016-07-18 | 2016-07-18 | A kind of LED power supply based on pulse current-limiting circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610566993.8A CN106211439A (en) | 2016-07-18 | 2016-07-18 | A kind of LED power supply based on pulse current-limiting circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106211439A true CN106211439A (en) | 2016-12-07 |
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ID=57493924
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610566993.8A Pending CN106211439A (en) | 2016-07-18 | 2016-07-18 | A kind of LED power supply based on pulse current-limiting circuit |
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| CN (1) | CN106211439A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108112129A (en) * | 2018-01-10 | 2018-06-01 | 生迪智慧科技有限公司 | Constant current driver circuit for LED |
-
2016
- 2016-07-18 CN CN201610566993.8A patent/CN106211439A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108112129A (en) * | 2018-01-10 | 2018-06-01 | 生迪智慧科技有限公司 | Constant current driver circuit for LED |
| CN108112129B (en) * | 2018-01-10 | 2023-12-12 | 生迪智慧科技有限公司 | LED constant current driving circuit |
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Application publication date: 20161207 |
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| WD01 | Invention patent application deemed withdrawn after publication |