CN106211421A - A kind of LED multiple-channel output regulated power supply based on overvoltage crowbar - Google Patents
A kind of LED multiple-channel output regulated power supply based on overvoltage crowbar Download PDFInfo
- Publication number
- CN106211421A CN106211421A CN201610522511.9A CN201610522511A CN106211421A CN 106211421 A CN106211421 A CN 106211421A CN 201610522511 A CN201610522511 A CN 201610522511A CN 106211421 A CN106211421 A CN 106211421A
- Authority
- CN
- China
- Prior art keywords
- pole
- electric capacity
- resistance
- negative pole
- diode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- 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
-
- 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]
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention discloses a kind of LED multiple-channel output regulated power supply based on overvoltage crowbar, it is characterized in that, main by diode rectifier U, transformator T, control chip U1, negative pole is connected with the cathode output end of diode rectifier U, the electric capacity C1 that positive pole is connected with the VFIN pin of control chip U1 after resistance R1, positive pole is connected with the cathode output end of diode rectifier U, the electric capacity C7 that negative pole is sequentially connected with the VCC pin of control chip U1 after electric capacity C4 through resistance R9, it is serially connected in the second-order filter circuit between the secondary inductance coil of transformator T and diode rectifier U, the overvoltage crowbars being connected with second-order filter circuit etc. form.Power supply self and LED lamp can be protected by the present invention when there is overvoltage, it is to avoid damaged by overvoltage.
Description
Technical field
The present invention relates to electronic applications, specifically refer to a kind of LED multiple-channel output voltage stabilizing based on overvoltage crowbar electricity
Source.
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 has had become as people
One of the main product of life lighting.Along with illuminating effect requirement is improved constantly by the universal of LED and people, to LED electricity
Source brings new challenge.The coefficient of stability of the most traditional LED power is the highest, and it is easily subject to electromagnetic signal interference, very
The illuminating effect of LED is reduced, it is impossible to reach the lighting requirement of people in big degree.
Summary of the invention
It is an object of the invention to overcome the defect that the stability of traditional LED power is low, it is provided that a kind of protect based on overvoltage
The LED of protection circuit multiple-channel output regulated power supply.
The purpose of the present invention is achieved through the following technical solutions: a kind of LED multiple-channel output based on overvoltage crowbar
Regulated power supply, mainly by diode rectifier U, transformator T, control chip U1, negative pole exports with the negative pole of diode rectifier U
The electric capacity C1 that end is connected, positive pole is connected with the VFIN pin of control chip U1 after resistance R1, positive pole and diode rectification
The cathode output end of device U is connected, negative pole is sequentially connected with the VCC pin of control chip U1 after electric capacity C4 through resistance R9
Electric capacity C7, is serially connected in the second-order filter circuit between the secondary inductance coil of transformator T and diode rectifier U, filters with second order
The overvoltage crowbar that wave circuit is connected, the switching signal being connected with overvoltage crowbar and second-order filter circuit respectively is driven
Galvanic electricity road, positive pole is connected with the OUT pin of control chip U1, negative pole CS pin with control chip U1 after resistance R2 is connected
The electric capacity C3 connect, positive pole is connected with the RT pin of control chip U1, negative pole after resistance R5 with switching signal drive circuit phase
The electric capacity C2 connected, the resistance R4 being serially connected between the VREF pin of control chip U1 and the negative pole of electric capacity C2, and and transformation
The multiplex output circuit composition that the secondary inductance coil of device T is connected；The GND pin ground connection of described control chip U1, its OUT pipe
Foot is also connected with switching signal drive circuit.
Further, described overvoltage crowbar by processing chip U4, audion VT3, audion VT4, field effect transistor
MOS1, the electric capacity that positive pole is then connected with the drain electrode of field effect transistor MOS1 as the input of this overvoltage crowbar, negative pole
The transmitting of C15, resistance R15, the P pole being serially connected between the positive pole of electric capacity C15 and the colelctor electrode of audion VT3 and audion VT3
Pole is connected, N pole is then connected with the positive pole of electric capacity C15 with diode D5, the P pole that is connected of GND pin processing chip U4,
The diode D6 that N pole is connected with the N pole of diode D5 after resistance R16, is serially connected in the base stage of audion VT3 and processes chip
Resistance R18 between the ON pin of U4, is serially connected in the resistance between the negative pole of electric capacity C15 and the VCC pin processing chip U4
R19, is serially connected in the resistance R17 between the TIMER pin and the N pole of diode D5 that process chip U4, and positive pole is negative with electric capacity C15's
The electric capacity C16 that pole is connected, negative pole is then connected with the SENSE pin processing chip U4, is serially connected in the grid of field effect transistor MOS1
Pole and process chip U4 GATE pin between resistance R20, one end is connected with the source electrode of field effect transistor MOS1, the other end then
The resistance R21 that base stage with audion VT4 is connected after inductance L5, positive pole is connected with the grid of field effect transistor MOS1, negative
The electric capacity C17 that pole then colelctor electrode with audion VT4 is connected, is serially connected in and processes the FB pin of chip U4 and audion VT4
Resistance R22, N pole between emitter stage is connected with the emitter stage of audion VT4, P pole is then connected with the N pole of diode D5
Zener diode D7, and positive pole base stage with audion VT4 after resistance R23 is connected, negative pole then with the N pole of diode D5
The electric capacity C18 composition being connected；The GND pin ground connection of described process chip U4；The junction point of described resistance R21 and inductance L5 is then
Form the outfan of this overvoltage crowbar and be connected with second-order filter circuit；The input of described overvoltage crowbar then with
Switching signal drive circuit is connected.
Described second-order filter circuit, by audion VT1, is serially connected in cathode output end and the audion of diode rectifier U
Resistance R11 between the base stage of VT1, positive pole is connected with the cathode output end of diode rectifier U, negative pole then with transformator T
The electric capacity C8 that is connected of the Same Name of Ends of former limit inductance coil L1, be serially connected in negative pole and the colelctor electrode of audion VT1 of electric capacity C8
Between resistance R12, N pole be connected with the Same Name of Ends of the former limit inductance coil L2 of transformator T, the diode D2 of P pole ground connection, string
The resistance R10 being connected between the emitter stage of audion VT1 and the P pole of diode D2, positive pole is connected with the emitter stage of audion VT1
Connect, electric capacity C9 that negative pole then non-same polarity with the former limit inductance coil L1 of transformator T is connected, and positive pole is with electric capacity C8's
Negative pole is connected, the negative pole electric capacity C10 composition that then negative pole with electric capacity C9 is connected after diode D1；Described transformator T's
The non-same polarity ground connection of former limit inductance coil L2；The negative pole of described electric capacity C9 is also connected with the outfan of overvoltage crowbar.
Described switching signal drive circuit, by audion VT2, field effect transistor MOS, is serially connected in base stage and the control of audion VT2
Resistance R3 between the OUT pin of coremaking sheet U1, positive pole is connected with the P pole of diode D2, negative pole after resistance R7 with three poles
The electric capacity C5 that the colelctor electrode of pipe VT2 is connected, positive pole is connected with the input of overvoltage crowbar, negative pole after resistance R8 with
The electric capacity C6 that the drain electrode of field effect transistor MOS is connected, and one end is connected with the source electrode of field effect transistor MOS, other end ground connection
Resistance R6 composition；The emitter stage of described audion VT2 negative pole with electric capacity C2 after resistance R5 is connected, its colelctor electrode then with
The grid of field effect transistor MOS is connected.
Described multiplex output circuit is by the first output circuit being connected with the secondary inductance coil L3 of transformator T, with change
The second output circuit composition that the secondary inductance coil L4 of depressor T is connected；Described first output circuit is by manostat U2, P pole
Two poles that non-same polarity is connected, N pole is then connected with the IN pin of manostat U2 with the secondary inductance coil L3 of transformator T
Pipe D3, positive pole is connected with the N pole of diode D3, negative pole then Same Name of Ends with the secondary inductance coil L3 of transformator T is connected
Electric capacity C11, the electric capacity C13 that positive pole is connected with the OUT pin of manostat U2, negative pole then negative pole with electric capacity C11 is connected,
And one end is connected with the positive pole of electric capacity C13, the other end then negative pole with electric capacity C13 is collectively forming this first output circuit
The resistance R13 composition of outfan；The GND pin of described manostat U2 be connected with the negative pole of electric capacity C11 while ground connection.
Described second output circuit is connected by the non-same polarity of manostat U3, P pole with the secondary inductance coil L4 of transformator T
Connect, diode D4 that N pole is then connected with the IN pin of manostat U3, positive pole is connected with the N pole of diode D4, negative pole then with
The electric capacity C12 that the Same Name of Ends of the secondary inductance coil L4 of transformator T is connected, positive pole is connected with the OUT pin of manostat U3,
The electric capacity C14 that negative pole then negative pole with electric capacity C12 is connected, and one end is connected with the positive pole of electric capacity C14, the other end then with
The negative pole of electric capacity C14 is collectively forming the resistance R14 composition of the outfan of this second output circuit；The GND pipe of described manostat U3
Foot be connected with the negative pole of electric capacity C12 while ground connection.
Described control chip U1 is the integrated chip of UC3842, and described manostat U2 and manostat U3 is W7806 voltage stabilizing core
Sheet, described process chip U4 is the integrated chip of LT1641-2.
The present invention compared with the prior art, has the following advantages and beneficial effect:
(1) electromagnetic interference signal can effectively be filtered by the present invention, it is to avoid electromagnetic interference signal affects the present invention
Stability so that LED operation is more stable.
(2) present invention uses the integrated chip of UC3842 to combine peripheral circuit, so that the structure of the present invention is simpler, joint
Can, more traditional regulated power supply energy consumption saves 40%.
(3) power supply self and LED lamp can be protected by the present invention when there is overvoltage, it is to avoid by overvoltage
Damage.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of the present invention.
Fig. 2 is the overvoltage crowbar structure chart of the present invention.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited to
This.
Embodiment
As it is shown in figure 1, the LED multiple-channel output regulated power supply based on overvoltage crowbar of the present invention, mainly by two poles
Pipe commutator U, transformator T, control chip U1, negative pole is connected with the cathode output end of diode rectifier U, positive pole is through resistance
The electric capacity C1 being connected with the VFIN pin of control chip U1 after R1, positive pole is connected with the cathode output end of diode rectifier U
Connect, electric capacity C7 that negative pole is sequentially connected with the VCC pin of control chip U1 after electric capacity C4 through resistance R9, be serially connected in transformator
Second-order filter circuit between secondary inductance coil and the diode rectifier U of T, the overvoltage being connected with second-order filter circuit is protected
Protection circuit, the switching signal drive circuit being connected with overvoltage crowbar and second-order filter circuit respectively, positive pole and control core
The electric capacity C3 that the OUT pin of sheet U1 is connected, negative pole is connected with the CS pin of control chip U1 after resistance R2, positive pole and control
The electric capacity C2 that the RT pin of coremaking sheet U1 is connected, negative pole is connected with switching signal drive circuit after resistance R5, is serially connected in
Resistance R4 between VREF pin and the negative pole of electric capacity C2 of control chip U1, and with the secondary inductance coil phase of transformator T
The multiplex output circuit composition connected；The GND pin ground connection of described control chip U1, its OUT pin also drive with switching signal
Circuit is connected.In order to preferably implement the present invention, the described control chip U1 integrated chip of preferred UC3842 realizes.
Described second-order filter circuit is by audion VT1, resistance R11, resistance R12, resistance R10, electric capacity C8, electric capacity C9, electricity
Hold C10, diode D1 and diode D2 composition.
During connection, resistance R11 is serially connected between the cathode output end of diode rectifier U and the base stage of audion VT1.Electricity
The positive pole holding C8 is connected with the cathode output end of diode rectifier U, its negative pole then with the former limit inductance coil L1 of transformator T
Same Name of Ends be connected.Resistance R12 is serially connected between the negative pole of electric capacity C8 and the colelctor electrode of audion VT1.The N pole of diode D2
Be connected with the Same Name of Ends of the former limit inductance coil L2 of transformator T, its P pole ground connection.Resistance R10 is serially connected in sending out of audion VT1
Between the P pole of emitter-base bandgap grading and diode D2.The positive pole of electric capacity C9 is connected with the emitter stage of audion VT1, its negative pole then with transformation
The non-same polarity of the former limit inductance coil L1 of device T is connected.The positive pole of electric capacity C10 is connected with the negative pole of electric capacity C8, its negative pole
Then it is connected with the P pole of diode D1.The N pole of described diode D1 then negative pole with electric capacity C9 is connected.Described transformator T's
The non-same polarity ground connection of former limit inductance coil L2.The negative pole of described electric capacity C9 is also connected with the outfan of overvoltage crowbar.
Described switching signal drive circuit is by audion VT2, field effect transistor MOS, resistance R3, resistance R7, resistance R8, resistance
R6, electric capacity C5 and electric capacity C6 form.
During connection, resistance R3 is serially connected between the base stage of audion VT2 and the OUT pin of control chip U1.Electric capacity C5's
Positive pole is connected with the P pole of diode D2, its negative pole colelctor electrode with audion VT2 after resistance R7 is connected.Electric capacity C6's
Positive pole is connected with the input of overvoltage crowbar, the drain electrode with field effect transistor MOS after resistance R8 of its negative pole is connected.Electricity
One end of resistance R6 is connected with the source electrode of field effect transistor MOS, its other end ground connection.The emitter stage of described audion VT2 is through resistance
After R5, the negative pole with electric capacity C2 is connected, its colelctor electrode is then connected with the grid of field effect transistor MOS.
Described multiplex output circuit is by the first output circuit being connected with the secondary inductance coil L3 of transformator T, with change
The second output circuit composition that the secondary inductance coil L4 of depressor T is connected.
Wherein, described first output circuit is by manostat U2, diode D3, electric capacity C11, electric capacity C13 and resistance R13 group
Become.
During connection, the P pole of diode D3 is connected with the non-same polarity of the secondary inductance coil L3 of transformator T, its N pole then
It is connected with the IN pin of manostat U2.The positive pole of electric capacity C11 is connected with the N pole of diode D3, its negative pole then with transformator T
The Same Name of Ends of secondary inductance coil L3 be connected.The positive pole of electric capacity C13 is connected with the OUT pin of manostat U2, its negative pole
Then the negative pole with electric capacity C11 is connected.One end of resistance R13 is connected with the positive pole of electric capacity C13, its other end then with electric capacity
The negative pole of C13 is collectively forming the outfan of this first output circuit.The GND pin of described manostat U2 and the negative pole of electric capacity C11
Ground connection while being connected.In order to preferably implement the present invention, this manostat U2 preferred W7806 voltage stabilizing chip.
It addition, described second output circuit is by manostat U3, diode D4, electric capacity C12, electric capacity C14 and resistance R14 group
Become.
During connection, the P pole of diode D4 is connected with the non-same polarity of the secondary inductance coil L4 of transformator T, its N pole then
It is connected with the IN pin of manostat U3.The positive pole of electric capacity C12 is connected with the N pole of diode D4, its negative pole then with transformator T
The Same Name of Ends of secondary inductance coil L4 be connected.The positive pole of electric capacity C14 is connected with the OUT pin of manostat U3, its negative pole
Then the negative pole with electric capacity C12 is connected.One end of resistance R14 is connected with the positive pole of electric capacity C14, its other end then with electric capacity
The negative pole of C14 is collectively forming the outfan of this second output circuit.The GND pin of described manostat U3 and the negative pole of electric capacity C12
Ground connection while being connected.In order to preferably implement the present invention, this manostat U3 preferred W7806 voltage stabilizing chip.
As in figure 2 it is shown, this overvoltage crowbar is by processing chip U4, audion VT3, audion VT4, field effect transistor
MOS1, resistance R15, resistance R16, resistance R17, resistance R18, resistance R19, resistance R20, resistance R21, resistance R22, resistance R23,
Electric capacity C15, electric capacity C16, electric capacity C17, electric capacity C18, diode D5, diode D6, Zener diode D7 and inductance L5 form.
During connection, the positive pole of electric capacity C15 as the input of this overvoltage crowbar and be connected with the positive pole of electric capacity C6,
Its negative pole is then connected with the drain electrode of field effect transistor MOS1.Resistance R15 is serially connected in positive pole and the collection of audion VT3 of electric capacity C15
Between electrode.The P pole of diode D5 is connected with the emitter stage of audion VT3, its N pole then with process chip U4 GND pin
It is connected.The P pole of diode D6 is connected with the positive pole of electric capacity C15, its N pole N with diode D5 after resistance R16 is extremely connected
Connect.Resistance R18 is serially connected between the base stage of audion VT3 and the ON pin processing chip U4.Resistance R19 is serially connected in electric capacity C15
Negative pole and process chip U4 VCC pin between.Resistance R17 is serially connected in TIMER pin and the diode D5 processing chip U4
N pole between.The positive pole of electric capacity C16 is connected with the negative pole of electric capacity C15, its negative pole then with process chip U4 SENSE pin
It is connected.Resistance R20 is serially connected between the grid of field effect transistor MOS1 and the GATE pin processing chip U4.The one of resistance R21
End is connected with the source electrode of field effect transistor MOS1, its other end then after inductance L5 base stage with audion VT4 be connected.Electric capacity
The positive pole of C17 is connected with the grid of field effect transistor MOS1, its negative pole then colelctor electrode with audion VT4 is connected.Resistance R22
It is serially connected between FB pin and the emitter stage of audion VT4 of process chip U4.The N pole of Zener diode D7 and audion VT4
Emitter stage be connected, base P pole is then connected with the N pole of diode D5.The positive pole of electric capacity C18 after resistance R23 with audion
The base stage of VT4 is connected, its negative pole is then connected with the N pole of diode D5.
Meanwhile, the GND pin ground connection of described process chip U4；The junction point of described resistance R21 and inductance L5 then forms this
The outfan of overvoltage crowbar is also connected with the negative pole of electric capacity C9.In order to preferably implement the present invention, described process chip
The integrated chip of the preferred LT1641-2 of U4 realizes.
Electromagnetic interference signal can effectively be filtered by the present invention, it is to avoid electromagnetic interference signal affects the steady of the present invention
It is qualitative, so that LED operation is more stable.Meanwhile, the present invention uses the integrated chip of UC3842 to combine peripheral circuit, can go out
During existing overvoltage, power supply self and LED lamp are protected, it is to avoid damaged by overvoltage.
As it has been described above, just can well realize the present invention.
Claims (7)
1. a LED multiple-channel output regulated power supply based on overvoltage crowbar, it is characterised in that main by diode rectification
Device U, transformator T, control chip U1, negative pole is connected with the cathode output end of diode rectifier U, positive pole after resistance R1 with
The electric capacity C1 that the VFIN pin of control chip U1 is connected, positive pole is connected with the cathode output end of diode rectifier U, negative pole
The electric capacity C7 being sequentially connected with the VCC pin of control chip U1 after electric capacity C4 through resistance R9, is serially connected in the secondary of transformator T
Second-order filter circuit between inductance coil and diode rectifier U, the overvoltage crowbar being connected with second-order filter circuit,
The switching signal drive circuit being connected with overvoltage crowbar and second-order filter circuit respectively, positive pole is with control chip U1's
The electric capacity C3 that OUT pin is connected, negative pole is connected with the CS pin of control chip U1 after resistance R2, positive pole and control chip
The electric capacity C2 that the RT pin of U1 is connected, negative pole is connected with switching signal drive circuit after resistance R5, is serially connected in control core
Resistance R4 between VREF pin and the negative pole of electric capacity C2 of sheet U1, and be connected with the secondary inductance coil of transformator T
Multiplex output circuit forms；The GND pin ground connection of described control chip U1, its OUT pin also with switching signal drive circuit phase
Connect.
A kind of LED multiple-channel output regulated power supply based on overvoltage crowbar the most according to claim 1, its feature exists
In, described overvoltage crowbar is by processing chip U4, and audion VT3, audion VT4, field effect transistor MOS1, positive pole is as this mistake
The electric capacity C15 that the input of voltage protection circuit, negative pole are then connected with the drain electrode of field effect transistor MOS1, is serially connected in electric capacity C15's
Resistance R15, P pole between the colelctor electrode of positive pole and audion VT3 is connected with the emitter stage of audion VT3, N pole then with process
Diode D5, the P pole that the GND pin of chip U4 is connected is connected with the positive pole of electric capacity C15, N pole after resistance R16 with two poles
The diode D6 that the N pole of pipe D5 is connected, is serially connected in the resistance between the base stage of audion VT3 and the ON pin processing chip U4
R18, is serially connected in the resistance R19 between the negative pole of electric capacity C15 and the VCC pin processing chip U4, is serially connected in and processes chip U4's
Resistance R17 between the N pole of TIMER pin and diode D5, positive pole is connected with the negative pole of electric capacity C15, negative pole then with process
The electric capacity C16 that the SENSE pin of chip U4 is connected, the grid being serially connected in field effect transistor MOS1 and the GATE pipe processing chip U4
Resistance R20 between foot, one end is connected with the source electrode of field effect transistor MOS1, the other end then after inductance L5 with audion VT4
The resistance R21 that is connected of base stage, positive pole is connected with the grid of field effect transistor MOS1, negative pole then with the current collection of audion VT4
The electric capacity C17 that pole is connected, is serially connected in the resistance R22, N between the FB pin and the emitter stage of audion VT4 that process chip U4
The Zener diode D7 that pole is connected with the emitter stage of audion VT4, P pole is then connected with the N pole of diode D5, and positive pole
The electric capacity C18 composition that base stage with audion VT4 is connected after resistance R23, negative pole is then connected with the N pole of diode D5；
The GND pin ground connection of described process chip U4；The junction point of described resistance R21 and inductance L5 then forms this overvoltage crowbar
Outfan is also connected with second-order filter circuit；The input of described overvoltage crowbar is then connected with switching signal drive circuit
Connect.
A kind of LED multiple-channel output regulated power supply based on overvoltage crowbar the most according to claim 2, its feature exists
In, described second-order filter circuit, by audion VT1, is serially connected in cathode output end and the base of audion VT1 of diode rectifier U
Resistance R11 between pole, positive pole is connected with the cathode output end of diode rectifier U, negative pole is then electric with the former limit of transformator T
The electric capacity C8 that the Same Name of Ends of sense coil L1 is connected, is serially connected in the electricity between the negative pole of electric capacity C8 and the colelctor electrode of audion VT1
Resistance R12, N pole is connected with the Same Name of Ends of the former limit inductance coil L2 of transformator T, the diode D2 of P pole ground connection, is serially connected in three poles
Resistance R10 between emitter stage and the P pole of diode D2 of pipe VT1, positive pole is connected with the emitter stage of audion VT1, negative pole
The electric capacity C9 that then non-same polarity with the former limit inductance coil L1 of transformator T is connected, and the negative pole phase of positive pole and electric capacity C8
Connect, the negative pole electric capacity C10 composition that then negative pole with electric capacity C9 is connected after diode D1；The former limit electricity of described transformator T
The non-same polarity ground connection of sense coil L2；The negative pole of described electric capacity C9 is also connected with the outfan of overvoltage crowbar.
A kind of LED multiple-channel output regulated power supply based on overvoltage crowbar the most according to claim 3, its feature exists
In, described switching signal drive circuit, by audion VT2, field effect transistor MOS, is serially connected in the base stage of audion VT2 and controls core
Resistance R3 between the OUT pin of sheet U1, positive pole is connected with the P pole of diode D2, negative pole after resistance R7 with audion VT2
The electric capacity C5 that is connected of colelctor electrode, positive pole is connected with the input of overvoltage crowbar, negative pole is imitated with field after resistance R8
Should the electric capacity C6 that is connected of the drain electrode of pipe MOS, and one end is connected with the source electrode of field effect transistor MOS, the electricity of other end ground connection
Resistance R6 composition；The emitter stage of described audion VT2 negative pole with electric capacity C2 after resistance R5 is connected, its colelctor electrode is then imitated with field
Should the grid of pipe MOS be connected.
A kind of LED multiple-channel output regulated power supply based on overvoltage crowbar the most according to claim 4, its feature exists
In, described multiplex output circuit is by the first output circuit being connected with the secondary inductance coil L3 of transformator T, with transformator T
Secondary inductance coil L4 be connected second output circuit composition；Described first output circuit is by manostat U2, P pole and transformation
The diode D3 that non-same polarity is connected, N pole is then connected with the IN pin of manostat U2 of the secondary inductance coil L3 of device T,
The electric capacity that positive pole is connected with the N pole of diode D3, negative pole then Same Name of Ends with the secondary inductance coil L3 of transformator T is connected
C11, the electric capacity C13, Yi Jiyi that positive pole is connected with the OUT pin of manostat U2, negative pole then negative pole with electric capacity C11 is connected
End is connected with the positive pole of electric capacity C13, the other end then negative pole with electric capacity C13 is collectively forming the outfan of this first output circuit
Resistance R13 composition；The GND pin of described manostat U2 be connected with the negative pole of electric capacity C11 while ground connection.
A kind of LED multiple-channel output regulated power supply based on overvoltage crowbar the most according to claim 5, its feature exists
In, described second output circuit is connected by the non-same polarity of manostat U3, P pole with the secondary inductance coil L4 of transformator T, N
The diode D4 that pole is then connected with the IN pin of manostat U3, positive pole is connected with the N pole of diode D4, negative pole then with transformation
The electric capacity C12 that the Same Name of Ends of the secondary inductance coil L4 of device T is connected, positive pole is connected with the OUT pin of manostat U3, negative pole
The electric capacity C14 that then negative pole with electric capacity C12 is connected, and one end is connected with the positive pole of electric capacity C14, the other end then with electric capacity
The negative pole of C14 is collectively forming the resistance R14 composition of the outfan of this second output circuit；The GND pin of described manostat U3 with
The negative pole of electric capacity C12 be connected while ground connection.
A kind of LED multiple-channel output regulated power supply based on overvoltage crowbar the most according to claim 6, its feature exists
In, described control chip U1 is the integrated chip of UC3842, and described manostat U2 and manostat U3 is W7806 voltage stabilizing chip, institute
Stating process chip U4 is the integrated chip of LT1641-2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610522511.9A CN106211421A (en) | 2016-07-01 | 2016-07-01 | A kind of LED multiple-channel output regulated power supply based on overvoltage crowbar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610522511.9A CN106211421A (en) | 2016-07-01 | 2016-07-01 | A kind of LED multiple-channel output regulated power supply based on overvoltage crowbar |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106211421A true CN106211421A (en) | 2016-12-07 |
Family
ID=57465875
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610522511.9A Withdrawn CN106211421A (en) | 2016-07-01 | 2016-07-01 | A kind of LED multiple-channel output regulated power supply based on overvoltage crowbar |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106211421A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106604472A (en) * | 2016-12-30 | 2017-04-26 | 深圳Tcl数字技术有限公司 | Led drive circuit |
| CN106954303A (en) * | 2017-03-30 | 2017-07-14 | 四川万康节能环保科技有限公司 | A kind of electronic energy-saving lamp controls circuit with ripple current suppressive |
-
2016
- 2016-07-01 CN CN201610522511.9A patent/CN106211421A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106604472A (en) * | 2016-12-30 | 2017-04-26 | 深圳Tcl数字技术有限公司 | Led drive circuit |
| CN106604472B (en) * | 2016-12-30 | 2019-05-31 | 深圳Tcl数字技术有限公司 | LED drive circuit |
| CN106954303A (en) * | 2017-03-30 | 2017-07-14 | 四川万康节能环保科技有限公司 | A kind of electronic energy-saving lamp controls circuit with ripple current suppressive |
| CN106954303B (en) * | 2017-03-30 | 2018-10-02 | 乐清市风杰电子科技有限公司 | A kind of electronic energy-saving lamp ripple current suppressive control circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105873286A (en) | Energy-saving power circuit for constant-current drive type cold light LED | |
| CN106211421A (en) | A kind of LED multiple-channel output regulated power supply based on overvoltage crowbar | |
| CN106211426A (en) | A kind of voltage amplification scale-up version cold light LED energy-saving electric power circuit | |
| CN106211423A (en) | A kind of ripple suppressive LED energy-saving driving system based on power amplification circuit | |
| CN105979651A (en) | Frequency compensation circuit-based current protection-type white LED step-up conversion system | |
| CN105792451A (en) | Constant-voltage drive power supply for white LED on basis of photocoupling feedback circuit | |
| CN105934044A (en) | Multi-way output voltage stabilized power supply for LED based on snubber circuit | |
| CN106160494A (en) | A kind of feedback signal processing-type PWM inverse-excitation type switch power-supply | |
| CN106132010A (en) | A kind of diode pressure resistant type cold light LED energy-saving electric power circuit | |
| CN104168693B (en) | A kind of LED filter regulator circuit | |
| CN105916246A (en) | White light LED oscillation-type high-efficiency driving system | |
| CN106211420A (en) | Overpressure-proof type LED multiple-output electric power based on composite buffering circuit | |
| CN106211439A (en) | A kind of LED power supply based on pulse current-limiting circuit | |
| CN106132006A (en) | A kind of LED multiple-channel output regulated power supply | |
| CN106061005A (en) | Triode hybrid oscillation circuit-based constant-voltage driving power source for white light LED | |
| CN105813279A (en) | Voltage feedback-based white LED oscillatory efficiency drive system | |
| CN105979658A (en) | Overvoltage protection white light LED (Light-Emitting Diode) boost conversion system based on frequency compensating circuit | |
| CN106028514A (en) | Over-current protection type high-power LED power supply based on constant current drive circuit | |
| CN106028568A (en) | LED constant-current driving power supply based on surge voltage suppression circuit | |
| CN106028575A (en) | LED driving system | |
| CN106102236A (en) | A kind of overcurrent protective cold light LED voltage amplification power circuit | |
| CN105896995A (en) | High-voltage constant-current switching power supply | |
| CN106102239A (en) | A kind of LED energy-saving driving system based on power amplification circuit | |
| CN105873294A (en) | Efficient white light Led driving system | |
| CN106061033A (en) | Power supply circuit used for LED |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20161207 |
|
| WW01 | Invention patent application withdrawn after publication |