CN208424843U - A kind of LED linear constant-current circuit with Ripple Suppression and dimming function - Google Patents
A kind of LED linear constant-current circuit with Ripple Suppression and dimming function Download PDFInfo
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- CN208424843U CN208424843U CN201820689334.8U CN201820689334U CN208424843U CN 208424843 U CN208424843 U CN 208424843U CN 201820689334 U CN201820689334 U CN 201820689334U CN 208424843 U CN208424843 U CN 208424843U
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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
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- 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 utility model discloses a kind of LED linear constant-current circuit with Ripple Suppression and dimming function, is related to LED linear constant-current circuit, including rectifier bridge, bridge RC circuit, LED load, ripple suppression circuit, drive module and output capacitance；The input terminal connection AC exchange input of rectifier bridge, negative pole of output end ground connection, output head anode connect the anode of LED load；The output head anode of one end connection rectifier bridge of bridge RC circuit, the other end connect any end of rectifier bridge input terminal；The cathode of one end connection LED load of ripple suppression circuit, the other end connect drive module；The series connection group that output capacitance is parallel to LED load and ripple suppression circuit is constituted；Due to increasing Ripple Suppression function, output current ripple can be significantly reduced, improves the stroboscopic nature of lamps and lanterns, prevents visual fatigue, protects the eyes of user；Electric current is maintained simultaneously as providing without the second linear constant current circuit, can effectively improve the efficiency of system, saves the energy.
Description
Technical field
The utility model relates to LED linear constant-current circuit, specially a kind of LED line with Ripple Suppression and dimming function
Property constant-current circuit.
Background technique
LED linear constant-current circuit has system cost low, and chip periphery circuit is few, compatible E14 and E16 lamp cap application,
Being easy the advantages that passing through Electromagnetic Interference Test is widely used.
Existing LED linear constant-current circuit is provided to light modulator using the second linear constant current circuit and maintains electric current, prevents from adjusting
Light device accidentally turns off.The maintenance electric current that second linear constant current circuit generates does not flow through load, all consumes as loss, reduces
The efficiency of system；On the other hand, there are power frequency components for output electric current, and output current ripple is larger, then causes the frequency of lamps and lanterns
Dodge larger, biggish stroboscopic will cause user's visual fatigue, influence using.
Utility model content
The purpose of this utility model is to provide a kind of LED linear constant-current circuit with Ripple Suppression and dimming function,
To solve the problems mentioned in the above background technology.
To achieve the above object, the utility model provides the following technical solutions: one kind having Ripple Suppression and dimming function
LED linear constant-current circuit, comprising:
Rectifier bridge, input terminal connect AC exchange input, negative pole of output end ground connection；
Bridge RC circuit, one end connect the output head anode of the rectifier bridge, and the other end connects the rectifier bridge input
Any end at end；
LED load, anode connect the output head anode of the rectifier bridge；
Ripple suppression circuit, one end are connected to the cathode of the LED load；
Drive module connects the other end of the ripple suppression circuit；
Output capacitance is parallel to the series connection group of the LED load and ripple suppression circuit composition.
Further, the ripple suppression circuit includes:
Ripple Suppression metal-oxide-semiconductor, drain electrode connect the cathode of the LED load, and source electrode connects the linear constant current circuit
Drain electrode end D；
Delay startup capacitor, one end connect the grid of the Ripple Suppression metal-oxide-semiconductor, and the other end connects the Ripple Suppression
The source electrode of metal-oxide-semiconductor；
Partial pressure adjusts metal-oxide-semiconductor, and drain electrode connects the cathode of the LED load；
First divider resistance, one end connect the source electrode that the partial pressure adjusts metal-oxide-semiconductor, and the other end connects the Ripple Suppression
The grid of metal-oxide-semiconductor；
Second divider resistance, one end connect the grid of the Ripple Suppression metal-oxide-semiconductor, and the other end connects the Ripple Suppression
The source electrode of metal-oxide-semiconductor；
First voltage-stabiliser tube, cathode connect the drain electrode that the partial pressure adjusts metal-oxide-semiconductor；
Second voltage-stabiliser tube, cathode connect the grid that the partial pressure adjusts metal-oxide-semiconductor, and anode connects first voltage-stabiliser tube
Anode；
Zener diode, anode connect the anode of first voltage-stabiliser tube, and cathode connects the negative of first voltage-stabiliser tube
Pole；
Voltage regulation resistance is parallel to second voltage-stabiliser tube；
Integrating capacitor, one end connect the cathode of second voltage-stabiliser tube, and the other end connects the linear constant current circuit
Drain electrode end；
Resistance is compensated, one end connects the drain electrode that the partial pressure adjusts metal-oxide-semiconductor；
First compensation metal-oxide-semiconductor, drain electrode connection grid, and the other end of the connection that the drains compensation resistance, source electrode connection
The drain electrode end of the linear constant current circuit；
Second compensation metal-oxide-semiconductor, drain electrode connect the grid of the Ripple Suppression metal-oxide-semiconductor, grid connection first compensation
The grid of metal-oxide-semiconductor, source electrode connect the drain electrode end of the linear constant current circuit.
Further, the partial pressure adjusts and is in series with connection pressure limiting between the drain electrode of metal-oxide-semiconductor and the cathode of the LED load
Detect field-effect tube；
The source electrode of the pressure limiting detection field-effect tube connects the drain electrode that the partial pressure adjusts metal-oxide-semiconductor, and drain electrode connects the LED
The cathode of load, grid connect the drain electrode end of the linear constant current circuit.
Further, the drive module is resistance, constant-current source, inductance, capacitor or linear constant current circuit.
Further, the drive module includes:
Linear constant current circuit, with drain electrode end, source terminal and ground terminal, the drain electrode end connects the Ripple Suppression electricity
Road, the ground terminal ground connection；
Current sense resistor, one end connect the source terminal of the linear constant current circuit, other end ground connection.
Further, the rectifier bridge is the bridge rectifier of 4 diodes composition.
Further, the bridge RC circuit is the series connection group that bridge resistance and bridge capacitor are composed in series.
Further, the first compensation metal-oxide-semiconductor, the second compensation metal-oxide-semiconductor, the partial pressure adjust metal-oxide-semiconductor and ripple
Inhibition metal-oxide-semiconductor is PMOS tube, NMOS tube, PNP pipe or NPN pipe；
The zener diode is pnp pipe, npn pipe, voltage-stabiliser tube or metal-oxide-semiconductor；
First voltage-stabiliser tube and second voltage-stabiliser tube are pnp pipe, npn pipe, diode or metal-oxide-semiconductor；
Compared with prior art, the utility model has the beneficial effects that
1. can significantly reduce output current ripple due to increasing Ripple Suppression function, improve the stroboscopic nature of lamps and lanterns, prevent
Only visual fatigue protects the eyes of user.
2. maintaining electric current since no second linear constant current circuit provides, the efficiency of system can be effectively improved, is saved
The energy.
Detailed description of the invention
Fig. 1 is the electrical block diagram of the utility model；
Fig. 2 is the electrical block diagram of one ripple suppression circuit of the utility model embodiment；
Fig. 3 is the brightness adjustment control working waveform figure of the utility model embodiment one；
Fig. 4 is the Ripple Suppression control working waveform figure of the utility model embodiment one；
Fig. 5 is the electrical block diagram of two ripple suppression circuit of the utility model embodiment.
In appended drawing reference: 1, rectifier bridge；2, bridge RC circuit；3, ripple suppression circuit；4, drive module；41, linear permanent
Current circuit.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
Embodiment one
A kind of LED linear constant-current circuit with Ripple Suppression and dimming function, as shown in Figure 1, include rectifier bridge 1, across
Bridge RC circuit 2, LED load L1, ripple suppression circuit 3, drive module 4 and output capacitance Cout.Rectifier bridge 1 is 4 diodes
The bridge rectifier of composition, negative pole of output end ground connection, output head anode connect the anode of LED load L1, input terminal connection
Exchange input AC.The both ends of exchange input AC are the first ac input end A and the second ac input end B.Bridge RC circuit 2 is
Bridge resistance Rrc and bridge capacitor Crc, bridge one end resistance Rrc connect one end of bridge capacitor Crc.Bridge resistance Rrc's
The other end connects the first ac input end A, the output head anode of the other end connection rectifier bridge 1 of bridge capacitor Crc.Drive module
4 include linear constant current circuit 41 and current sense resistor Rcs.Linear constant current circuit 41 has drain electrode end D, source terminal CS and ground connection
Hold GND, ground terminal GND ground connection.The one end current sense resistor Rcs connects the source terminal CS of linear constant current circuit 41, another termination
Ground.The cathode of one end connection LED load L1 of ripple suppression circuit 3, the other end connect the drain electrode end D of linear constant current circuit 41；
Output capacitance Cout is parallel to the series connection group that LED load L1 and ripple suppression circuit 3 are constituted.
The electric current flowed into from the first ac input end A is input current Iin, flows through the electric current of LED load L1 for output electricity
Iout is flowed, the electric current for flowing into drive module 4 is load current Iload, and the electric current for flowing through bridge RC circuit 2 is feedback current
Irc.The route for connecting LED load L1 anode and 1 output head anode of rectifier bridge is bus BUS.The voltage at LED load both ends is negative
Carry voltage Vled.
As shown in Fig. 2, ripple suppression circuit 3 includes compensation resistance R1vc, the first compensation metal-oxide-semiconductor Mm1, the second compensation MOS
Pipe Mm2, the first voltage-stabiliser tube Zst1, the second voltage-stabiliser tube Zst2, zener diode Dst, voltage regulation resistance Rst, integrating capacitor Cg, partial pressure
Adjust metal-oxide-semiconductor Mbuf, the first divider resistance Rup, the second divider resistance Rdn, Ripple Suppression metal-oxide-semiconductor Mdrv and delay startup capacitor
Cgate.The cathode of the drain electrode connection LED load L1 of Ripple Suppression MOS pipe Mdrv, the leakage of source connection lines constant-current circuit 41
Poles D.The grid of one end connection Ripple Suppression metal-oxide-semiconductor Mdrv of delay startup capacitor Cgate, the other end connect Ripple Suppression MOS
The source electrode of pipe Mdrv.Partial pressure adjusts the cathode of the drain electrode connection LED load L1 of metal-oxide-semiconductor Mbuf.The one of first divider resistance Rup
End connection partial pressure adjusts the source electrode of metal-oxide-semiconductor Mbuf, and the other end connects the grid of Ripple Suppression metal-oxide-semiconductor Mdrv.Second divider resistance
The grid of one end connection Ripple Suppression MOS pipe Mdrv of Rdn, the other end connect the source electrode of Ripple Suppression metal-oxide-semiconductor Mdrv.First
The cathode connection partial pressure of voltage-stabiliser tube Zst1 adjusts the drain electrode of metal-oxide-semiconductor Mbuf, the anode of the second voltage-stabiliser tube Zst2 of anode connection.The
The cathode connection partial pressure of two voltage-stabiliser tube Zst2 adjusts the grid of metal-oxide-semiconductor Mbuf.The anode connection first of zener diode Dst is steady
The anode of pressure pipe Zst1, cathode connect the cathode of the first voltage-stabiliser tube Zst1.Voltage regulation resistance Rst is parallel to the second voltage-stabiliser tube Zst2.
One end of integrating capacitor Cg connects the cathode of the second voltage-stabiliser tube Zst2, and the other end connects the drain electrode end D of linear constant current circuit 41.
One end connection partial pressure for compensating resistance R1vc adjusts the drain electrode of metal-oxide-semiconductor Mbuf, the leakage of the first compensation of other end connection metal-oxide-semiconductor Mm1
Pole.The drain electrode of first compensation metal-oxide-semiconductor Mm1 connects grid, and the grid of the second compensation of grid connection metal-oxide-semiconductor Mm2, source connection lines
The drain electrode end D of property constant-current circuit 41.The grid of the drain electrode connection Ripple Suppression metal-oxide-semiconductor Mdrv of second compensation metal-oxide-semiconductor Mm2, source electrode
Connect the drain electrode end D of linear constant current circuit 41.
First compensation metal-oxide-semiconductor Mm1, the second compensation metal-oxide-semiconductor Mm2, partial pressure adjust metal-oxide-semiconductor Mbuf and Ripple Suppression metal-oxide-semiconductor
Mdrv is preferably PMOS tube, NMOS tube, PNP pipe or NPN pipe.Zener diode Dst be preferably pnp pipe, npn pipe, voltage-stabiliser tube or
Metal-oxide-semiconductor.First voltage-stabiliser tube Zst1 and the second voltage-stabiliser tube Zst2 is preferably pnp pipe, npn pipe, diode or metal-oxide-semiconductor.Drive module 4
Preferably resistance, constant-current source, inductance, capacitor or linear constant current circuit.
The working principle of the brightness adjustment control of the present embodiment is as follows:
As shown in Figure 1, in power frequency positive half period, at light modulator cut phase edge, after light modulator has shutdown to become conducting, input
Electric current Iin flows into bus BUS through bridge RC circuit 2 from the first ac input end A, finally flows into the second ac input end B, to adjust
Light device, which provides, maintains electric current.At light modulator cut phase edge, since light modulator becomes being connected from turning off, the voltage of bus BUS can dash forward
Become and increase, greater than the voltage of the first ac input end A, bridge capacitor Crc electric discharge, bus BUS node voltage is gradually decreased.When
When the voltage of first ac input end A is greater than the voltage of bus BUS, input current Iin is from the first rectified bridge of ac input end A
1 flows into bus BUS.When the voltage of exchange input AC is less than the load voltage Vled of LED load L1, rectifier bridge 1 is obstructed, LED
It loads L1 and passes through output capacitance Cout electric discharge power supply.
In power frequency negative half-cycle, at light modulator cut phase edge, after light modulator has shutdown to become conducting, input current Iin from
The rectified bridge 1 of second ac input end B, bridge RC circuit the 2 to the first ac input end A, provide maintenance electric current for light modulator；It is defeated
Enter electric current Iin without LED load L1, the current potential of the first ac input end A is greater than the current potential on ground, less than the electricity of bus BUS
, the capacitor Crc charging in bridge RC circuit 2, the voltage of the first ac input end A gradually decreases.When the first ac input end
When the current potential of A is less than the current potential on ground, input current Iin flows into bus BUS from the rectified bridge 1 of the second ac input end B.Work as exchange
When inputting load voltage Vled of the voltage of AC less than LED load L1, rectifier bridge 1 is obstructed, and LED load L1 passes through output capacitance
Cout electric discharge power supply.
Power frequency positive half period and in power frequency negative half-cycle toward complex Alternating, make input current Iin, feedback current Irc, load electricity
Waveform as shown in Figure 3 is presented in stream Iload and output electric current Iout.
The working principle of the Ripple Suppression control of the present embodiment is as follows:
As shown in Fig. 2, partial pressure adjusts partial pressure grid voltage Vg, the pressure drop of grid the source Vgs_buf and Wen Boyi of metal-oxide-semiconductor Mbuf
The suppressor grid voltage Vgate of straight metal-oxide-semiconductor Mdrv meets following relationship:
The first voltage-stabiliser tube Zst1 is added when the drain-source voltage Vds of Ripple Suppression metal-oxide-semiconductor Mdrv is greater than partial pressure grid voltage Vg
Reversed pressure stabilizing pressure drop Vz1 when, integrating capacitor Cg is charged by voltage regulation resistance Rst；When the leakage of Ripple Suppression MOS Mdrv
When source voltage Vds subtracts the forward conduction voltage drop Vdst of zener diode Dst less than partial pressure grid voltage Vg, integrating capacitor Cg is logical
Voltage regulation resistance Rst is crossed to discharge.By integrating capacitor Cg integral mean, so that the drain-source voltage of Ripple Suppression metal-oxide-semiconductor Mdrv
The average value of Vds are as follows:
Wherein, Vri is the ripple voltage between the drain electrode and source electrode of Ripple Suppression metal-oxide-semiconductor Mdrv, and Ra is LED load L1
For cathode to the first equivalent impedance of the first voltage-stabiliser tube Zst1 anode, Rb is the first voltage-stabiliser tube Zst1 anode to partial pressure adjusting metal-oxide-semiconductor
Second equivalent impedance of Mbuf grid.
Due to LED load L1 cathode to the first voltage-stabiliser tube Zst1 only reverse-biased between the first voltage-stabiliser tube Zst1 anode and surely
Diode Dst, the first equivalent impedance Rb is pressed to be approximately equal to the impedance of voltage regulation resistance Rst, the first equivalent impedance Ra is far longer than the
Two equivalent impedance Rb, to have:
Wherein, Vds_valley is the minimum of the drain-source voltage Vds of Ripple Suppression metal-oxide-semiconductor Mdrv.
Ripple Suppression metal-oxide-semiconductor Mdrv works in saturation region, a controlled current source is equivalent to, so that output capacitance
All load then keeps LED between the drain electrode and source electrode of Ripple Suppression metal-oxide-semiconductor Mdrv to ripple voltage Vcout on Cout
The load voltage Vled for loading L1 is constant, realizes lower output current ripple.
With the increase of the drain-source voltage Vds of Ripple Suppression metal-oxide-semiconductor Mdrv, the electric current compensated on resistance Rlvc passes through first
The grid voltage Vgate of Ripple Suppression metal-oxide-semiconductor Mdrv, drops in the current mirror for compensating the compensation of metal-oxide-semiconductor Mm1 and second metal-oxide-semiconductor Mm2
It is low, to reduce the electric current of Ripple Suppression metal-oxide-semiconductor Mdrv, to compensate Ripple Suppression metal-oxide-semiconductor Mdrv because channel modulation effect is led
The curent change of cause, further decreases output current ripple.
Second voltage-stabiliser tube Zst2 is for realizing quick start and prevents voltage regulation resistance Rst overcurrent.
The ripple voltage Vcout at the both ends output capacitance Cout, the drain-source voltage Vds of Ripple Suppression metal-oxide-semiconductor Mdrv and output
Waveform as described in Figure 4 is presented in the variation of electric current Iout.
Due to increasing Ripple Suppression function, the utility model can significantly reduce output current ripple, improve the frequency of lamps and lanterns
Characteristic is dodged, visual fatigue is prevented, protects the eyes of user.Electric current is maintained simultaneously because providing without the second linear constant current circuit,
The efficiency of system can be effectively improved, the energy is saved.
Embodiment two
Compared to embodiment one, as shown in figure 3, the present embodiment has the LED linear constant current of Ripple Suppression and dimming function
The ripple suppression circuit 3 of circuit further includes pressure limiting detection field-effect tube J1.Partial pressure adjusts the drain electrode and LED load of MOS pipe Mbuf
Connection pressure limiting detection field-effect tube J1 is in series between the cathode of L1, the source electrode connection partial pressure that pressure limiting detects field-effect tube J1 is adjusted
The drain electrode of metal-oxide-semiconductor Mbuf, the cathode of drain electrode connection LED load L1, the drain electrode end D of gate connection line constant-current circuit 41.
Pressure limiting, which detects field-effect tube J1, has pinch-off threshold voltage Vj1, between Ripple Suppression metal-oxide-semiconductor Mdrv drain electrode and source electrode
Voltage be drain-source voltage Vds.
When the drain-source voltage Vds of Ripple Suppression metal-oxide-semiconductor Mdrv is less than the pinch-off threshold voltage of pressure limiting detection field-effect tube J1
When Vj1, pressure limiting detects the voltage of the voltage follow pressure limiting detection field-effect tube J1 drain electrode of field-effect tube J1 source electrode, for normal
Control；When the drain-source voltage Vds of Ripple Suppression metal-oxide-semiconductor Mdrv is greater than the pinch-off threshold voltage Vj1 of pressure limiting detection field-effect tube J1
When, pressure limiting detects pinch-off threshold voltage Vj1 of the voltage clamp of field-effect tube J1 source electrode in pressure limiting detection field-effect tube J1, protection
Device will not excessive pressure damages.
While there has been shown and described that the embodiments of the present invention, for the ordinary skill in the art,
It is understood that these embodiments can be carried out with a variety of variations in the case where not departing from the principles of the present invention and spirit, repaired
Change, replacement and variant, including but not limited to resistance implementation such as Rcs1 uses conventional, electric-resistance or MOS resistance, to component
Zst1 is such as substituted for that multiple voltage-stabiliser tubes are series-parallel, Zst2 is substituted for diode, circuit part structure by the replacement of type or model
The change made such as Zst1 parallel resistance or capacitor, bus BUS and between parallel bus capacitor, the scope of the utility model by
The following claims and their equivalents limit.
Claims (8)
1. a kind of LED linear constant-current circuit with Ripple Suppression and dimming function characterized by comprising
Rectifier bridge, input terminal connect AC exchange input, negative pole of output end ground connection；
Bridge RC circuit, one end connect the output head anode of the rectifier bridge, and the other end connects the rectifier bridge input terminal
Any end；
LED load, anode connect the output head anode of the rectifier bridge；
Ripple suppression circuit, one end are connected to the cathode of the LED load；
Drive module connects the other end of the ripple suppression circuit；
Output capacitance is parallel to the series connection group of the LED load and ripple suppression circuit composition.
2. a kind of LED linear constant-current circuit with Ripple Suppression and dimming function according to claim 1, feature exist
In the ripple suppression circuit includes:
Ripple Suppression metal-oxide-semiconductor, drain electrode connect the cathode of the LED load, and source electrode connects the drain electrode of the linear constant current circuit
Hold D；
Delay startup capacitor, one end connect the grid of the Ripple Suppression metal-oxide-semiconductor, and the other end connects the Ripple Suppression metal-oxide-semiconductor
Source electrode；
Partial pressure adjusts metal-oxide-semiconductor, and drain electrode connects the cathode of the LED load；
First divider resistance, one end connect the source electrode that the partial pressure adjusts metal-oxide-semiconductor, and the other end connects the Ripple Suppression MOS
The grid of pipe；
Second divider resistance, one end connect the grid of the Ripple Suppression metal-oxide-semiconductor, and the other end connects the Ripple Suppression MOS
The source electrode of pipe；
First voltage-stabiliser tube, cathode connect the drain electrode that the partial pressure adjusts metal-oxide-semiconductor；
Second voltage-stabiliser tube, cathode connect the grid that the partial pressure adjusts metal-oxide-semiconductor, and anode is connecting first voltage-stabiliser tube just
Pole；
Zener diode, anode connect the anode of first voltage-stabiliser tube, and cathode connects the cathode of first voltage-stabiliser tube；
Voltage regulation resistance is parallel to second voltage-stabiliser tube；
Integrating capacitor, one end connect the cathode of second voltage-stabiliser tube, and the other end connects the drain electrode of the linear constant current circuit
End；
Resistance is compensated, one end connects the drain electrode that the partial pressure adjusts metal-oxide-semiconductor；
First compensation metal-oxide-semiconductor, drain electrode connection grid, and drain and connect the other end of the compensation resistance, described in source electrode connection
The drain electrode end of linear constant current circuit；
Second compensation metal-oxide-semiconductor, drain electrode connect the grid of the Ripple Suppression metal-oxide-semiconductor, grid connection the first compensation metal-oxide-semiconductor
Grid, source electrode connects the drain electrode end of the linear constant current circuit.
3. a kind of LED linear constant-current circuit with Ripple Suppression and dimming function according to claim 2, feature exist
In the partial pressure, which is adjusted, is in series with connection pressure limiting detection field-effect tube between the drain electrode of metal-oxide-semiconductor and the cathode of the LED load；
The source electrode of the pressure limiting detection field-effect tube connects the drain electrode that the partial pressure adjusts metal-oxide-semiconductor, and drain electrode connects the LED load
Cathode, grid connects the drain electrode end of the linear constant current circuit.
4. a kind of LED linear constant current with Ripple Suppression and dimming function as claimed in any of claims 1 to 3
Circuit, which is characterized in that
The drive module is resistance, constant-current source, inductance, capacitor or linear constant current circuit.
5. a kind of LED linear constant-current circuit with Ripple Suppression and dimming function according to claim 4, feature exist
In the drive module includes:
Linear constant current circuit, with drain electrode end, source terminal and ground terminal, the drain electrode end connects the ripple suppression circuit,
The ground terminal ground connection；
Current sense resistor, one end connect the source terminal of the linear constant current circuit, other end ground connection.
6. a kind of LED linear constant current with Ripple Suppression and dimming function as claimed in any of claims 1 to 3
Circuit, which is characterized in that the rectifier bridge is the bridge rectifier of 4 diodes composition.
7. a kind of LED linear constant current with Ripple Suppression and dimming function as claimed in any of claims 1 to 3
Circuit, which is characterized in that the bridge RC circuit is the series connection group that bridge resistance and bridge capacitor are composed in series.
8. a kind of LED linear constant-current circuit with Ripple Suppression and dimming function according to claim 2 or 3, special
Sign is:
The first compensation metal-oxide-semiconductor, the second compensation metal-oxide-semiconductor, the partial pressure adjusts metal-oxide-semiconductor and Ripple Suppression metal-oxide-semiconductor is
PMOS tube, NMOS tube, PNP pipe or NPN pipe；
The zener diode is pnp pipe, npn pipe, voltage-stabiliser tube or metal-oxide-semiconductor；
First voltage-stabiliser tube and second voltage-stabiliser tube are pnp pipe, npn pipe, diode or metal-oxide-semiconductor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820689334.8U CN208424843U (en) | 2018-05-09 | 2018-05-09 | A kind of LED linear constant-current circuit with Ripple Suppression and dimming function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820689334.8U CN208424843U (en) | 2018-05-09 | 2018-05-09 | A kind of LED linear constant-current circuit with Ripple Suppression and dimming function |
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| Publication Number | Publication Date |
|---|---|
| CN208424843U true CN208424843U (en) | 2019-01-22 |
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|---|---|---|---|
| CN201820689334.8U Expired - Fee Related CN208424843U (en) | 2018-05-09 | 2018-05-09 | A kind of LED linear constant-current circuit with Ripple Suppression and dimming function |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110099492A (en) * | 2019-05-29 | 2019-08-06 | 上海登芯微电子科技有限公司 | A kind of low power LED linear power circuit |
| US10624169B1 (en) * | 2018-09-28 | 2020-04-14 | Dioo Microcircuits Co., Ltd | LED current ripple elimination circuit applicable to very low TRIAC dimming depth |
-
2018
- 2018-05-09 CN CN201820689334.8U patent/CN208424843U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10624169B1 (en) * | 2018-09-28 | 2020-04-14 | Dioo Microcircuits Co., Ltd | LED current ripple elimination circuit applicable to very low TRIAC dimming depth |
| CN110099492A (en) * | 2019-05-29 | 2019-08-06 | 上海登芯微电子科技有限公司 | A kind of low power LED linear power circuit |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190122 |