CN206077778U - LED blood pressure lowering drive circuits - Google Patents
LED blood pressure lowering drive circuits Download PDFInfo
- Publication number
- CN206077778U CN206077778U CN201621107409.4U CN201621107409U CN206077778U CN 206077778 U CN206077778 U CN 206077778U CN 201621107409 U CN201621107409 U CN 201621107409U CN 206077778 U CN206077778 U CN 206077778U
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- grid
- stabilivolt
- audion
- reduction voltage
- limiting resistance
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- 230000036772 blood pressure Effects 0.000 title claims abstract description 26
- 230000001681 protective effect Effects 0.000 claims abstract description 14
- 239000003990 capacitor Substances 0.000 claims description 12
- 230000000694 effects Effects 0.000 abstract description 3
- 239000004065 semiconductor Substances 0.000 abstract description 2
- 230000005611 electricity Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 230000003321 amplification Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000003199 nucleic acid amplification method Methods 0.000 description 3
- 239000008186 active pharmaceutical agent Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/08—Modifications for protecting switching circuit against overcurrent or overvoltage
- H03K17/082—Modifications for protecting switching circuit against overcurrent or overvoltage by feedback from the output to the control circuit
- H03K17/0822—Modifications for protecting switching circuit against overcurrent or overvoltage by feedback from the output to the control circuit in field-effect transistor switches
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
- H03K17/687—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being field-effect transistors
- H03K17/6877—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being field-effect transistors the control circuit comprising active elements different from those used in the output circuit
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
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- Amplifiers (AREA)
Abstract
This utility model is related to a kind of LED blood pressure lowerings drive circuit, including the reduction voltage circuit unit that one or more mutually cascade, reduction voltage circuit unit includes P metal-oxide-semiconductor Q1, electrical switch, overvoltage protective module, grid source electrode protection module, grid electrode drive module and voltage feedback module, grid source electrode protection module is connected to the grid of Q1, between source electrode, overvoltage protective module is connected between the source electrode of Q1 and electronic switch controling end, voltage feedback module is connected between the drain electrode of Q1 and electronic switch controling end, grid electrode drive module includes current-limiting resistance R2 and audion Q3, R2 is connected between Q1 source electrodes and Q3 base stages, Q3 is connected between Q1 grids and reference ground, grid current-limiting resistance R4 is connected between Q3 and Q1 grids, electrical switch is connected between Q3 base stages and reference ground.The drawbacks of this utility model can overcome resistance-type reduction voltage circuit LED constant current effect difference and weak switch mode constant current Electric Circuit Electromagnetic Compatibility performance.
Description
Technical field
This utility model is related to a kind of DC decompression drive circuit, it is adaptable to small-power, the application of wide range input voltage
Occasion, the blood pressure lowering for being particularly suited for LED illumination drive.
Background technology
LED has the remarkable advantages such as fast response time, low-power consumption, energy-conservation, life-span length.Due to the rapid response speed of LED,
The application of automobile brake lamp and steering indicating light is particularly well-suited to, the probability of happening of the vehicle accidents such as rear-end collision can be reduced.LED light source
It has been widely used in automotive lighting field.LED actuation techniques are progressively developed also with the development of LED application technologies.
LED is a kind of change with by LED current value and changes the well-illuminated luminous source of light, so if needing LED
Luminous constant, then the current value that must control to flow through LED is constant.The LED for generally being adopted drives the linear regulation of constant current method
Two methods of formula (or claiming resistance-type) and switch regulating type.The core technology of linear regulation formula is using working in the range of linearity
Switching tube controls load as a dynamic adjustable resistance, to ensure, in the case where input voltage changes, to switch tube load
Different power consumptions, so that the electric current for flowing through LED load is remained unchanged substantially, but the constant current less effective of this mode；Switch
The core technology of adjustable type is Switching Power Supply, the proof load constant current in the wider input voltage range, but due to its work frequency
Rate is higher, can bring certain electromagnetic compatibility problem.
The content of the invention
To overcome the drawbacks described above of prior art, this utility model to provide a kind of LED blood pressure lowerings drive circuit, electricity can be overcome
The drawbacks of resistive reduction voltage circuit LED constant current effect difference and weak switch mode constant current Electric Circuit Electromagnetic Compatibility performance.
Main technical schemes of the present utility model have：
A kind of LED blood pressure lowerings drive circuit, including one or more reduction voltage circuit units for mutually cascading, the reduction voltage circuit list
Unit includes P-MOS pipe Q1, electrical switch, overvoltage protective module, grid source electrode protection module, grid electrode drive module and Voltage Feedback mould
Block, the grid source electrode protection module are connected between the grid and source electrode of the P-MOS pipes Q1, the overvoltage protective module connection
Between the control end of the source electrode and the electrical switch of the P-MOS pipes Q1, the voltage feedback module is connected to the P-
Between the control end of the drain electrode of metal-oxide-semiconductor Q1 and the electrical switch, the grid electrode drive module includes current-limiting resistance R2 and three poles
Pipe Q3, current-limiting resistance R2 are connected between the base stage of source electrode and audion Q3 of the P-MOS pipes Q1, and audion Q3 is connected to institute
State between the grid and reference ground of P-MOS pipe Q1, between the grid of audion Q3 and the P-MOS pipes Q1, be connected with grid current limliting
Resistance R4, the electrical switch are connected between the base stage and reference ground of the audion Q3.
The grid source electrode protection module can include stabilivolt DZ2 and the biasing resistor R3, the stabilivolt DZ2 being in parallel
Negative pole connect the source electrode of the P-MOS pipes Q1, the positive pole of the stabilivolt DZ2 connects the grid of the P-MOS pipes Q1.
The voltage feedback module can include stabilivolt DZ3 and the reverse flow limiting resistance R5 being in series, the stabilivolt
The negative pole of DZ3 connects the drain electrode of the P-MOS pipes Q1, and the positive pole of the stabilivolt DZ3 connects the reverse flow limiting resistance R5's
One end, the other end of the reverse flow limiting resistance R5 connect the control end of the electrical switch, the stable electricity of the stabilivolt DZ3
Output voltage of the pressure value according to needed for the reduction voltage circuit unit is chosen.
The overvoltage protective module preferably includes the stabilivolt DZ1 being in series and reverse flow limiting resistance R1, the stabilivolt
The negative pole of DZ1 connects the source electrode of the P-MOS pipes Q1, and the positive pole of the stabilivolt DZ1 connects the reverse flow limiting resistance R1's
One end, the other end of the reverse flow limiting resistance R1 connect the control end of the electrical switch, the stable electricity of the stabilivolt DZ1
Output voltage setting value of the pressure value more than its place reduction voltage circuit unit.
The electrical switch can adopt audion Q2, and the base stage of the audion Q2 is the control of the electrical switch
End.
The audion Q2 preferably adopts NPN type triode, its colelctor electrode to connect the base stage of the audion Q3, its transmitting
Pole connects reference ground.
The audion Q3 is preferably NPN type triode, and its colelctor electrode connects the grid current-limiting resistance R4, its emitter stage
Connection reference ground.
When reduction voltage circuit unit described in its only one of which, in the reduction voltage circuit unit can also include filter capacitor and
Counnter attack diode, when its contain it is multiple mutually cascade reduction voltage circuit unit when, at least in reduction voltage circuit unit described in the first order also
Can include that filter capacitor and the connected mode of counnter attack diode, the filter capacitor and counnter attack diode are preferably：It is described anti-
The source electrode of the corresponding P-MOS pipes Q1 of negative pole connection of anti-diode, the filter capacitor are connected to the counnter attack diode
Positive pole and reference ground between, the positive terminal of the counnter attack diode is configured to the voltage input end of the reduction voltage circuit unit.
The LED blood pressure lowerings drive circuit can also include DC source, and the positive pole of the DC source is connected to unique one
The positive terminal of the counnter attack diode of the individual reduction voltage circuit unit, or it is connected to multiple reduction voltage circuit units for mutually cascading
The positive terminal of the counnter attack diode of reduction voltage circuit unit described in the middle first order.
The beneficial effects of the utility model are：
Output voltage setting value determines by the stable voltage of the stabilivolt DZ3, flexibly can be arranged as requested, with
Adapt to the constant current requirement of all kinds of connection in series-parallel form LED modules.
Overvoltage protection setting value determines by the stable voltage of the stabilivolt DZ1, flexibly can be arranged as requested, with
Adapt to the demand of more occasions.
During input voltage is gradually increased to output voltage setting value from small to large, output voltage can be well
Follow the change of input voltage.
When input voltage is higher than output voltage setting value, if which is not more than overvoltage protection setting value, now output voltage
By constant in output voltage setting value or so.
When input voltage is higher than overvoltage protection setting value, now output will be cut off, and output voltage is reduced to 0V or so；When
Input voltage is returned to below overvoltage protection setting value, and output will be normal therewith.
The P-MOS pipes Q1 temperature stabilities are good, through test, when variation of ambient temperature, blood pressure lowering of the present utility model
The output of drive circuit can keep stable.
When unit cascaded using multiple reduction voltage circuits, i.e., first order blood pressure lowering first carried out, then carries out second level blood pressure lowering, until
Required cascade number, can so disperse power to every one-level so as to increase the fan-out capability of the LED blood pressure lowerings drive circuit.
Description of the drawings
Fig. 1 is the theory diagram of the reduction voltage circuit unit of the present utility model；
Fig. 2 is the structural representation of one embodiment of the reduction voltage circuit unit of the present utility model；
Fig. 3 is input direct voltage scanning analogous diagram；
Fig. 4 is ambient temperature sweep voltage output analogous diagram.
Specific embodiment
The utility model discloses a kind of LED blood pressure lowerings drive circuit, including one or more reduction voltage circuit lists for mutually cascading
Unit.As shown in figure 1, the reduction voltage circuit unit includes P-MOS pipe Q1, electrical switch, overvoltage protective module, grid source electrode protection mould
Block, grid electrode drive module and voltage feedback module, the grid source electrode protection module are connected to the grid of the P-MOS pipes Q1 and source
Between pole, the overvoltage protective module is connected between the control end of source electrode and the electrical switch of the P-MOS pipes Q1, institute
State voltage feedback module to be connected between the drain electrode of the P-MOS pipes Q1 and the control end of the electrical switch, the P-MOS pipes
The drain electrode output of Q1 simultaneously also serves as the input of the voltage feedback module, the grid electrode drive module include current-limiting resistance R2 and
Audion Q3, current-limiting resistance R2 are connected between the base stage of source electrode and audion Q3 of the P-MOS pipes Q1, audion Q3 connections
Between the grid and reference ground (i.e. with reference to 0 level) of the P-MOS pipes Q1, the grid of the audion Q3 and P-MOS pipes Q1
Between be connected with grid current-limiting resistance R4, the electrical switch is connected between the base stage and reference ground of the audion Q3.Institute
The source electrode and drain electrode of stating P-MOS pipe Q1 are respectively the voltage input end and voltage output end of the reduction voltage circuit unit.
The overvoltage protective module defines overvoltage protection setting value, and the voltage feedback module defines that output voltage sets
Definite value, overvoltage protection setting value are more than output voltage setting value.(1) (locate when input voltage is not more than output voltage setting value
In the range of LED normal work required voltages) when, the overvoltage protective module and the voltage feedback module all do not work,
The electrical switch shut-off, audion Q3 are operated in saturation region (i.e. fully on state), the grid voltage of the P-MOS pipes Q1
It is pulled low, the reduction voltage circuit unit has voltage output, and output voltage VOSet in the output voltage of the reduction voltage circuit unit
Within definite value, when input voltage changes, output voltage follows input voltage to change；(2) when input voltage is set more than output voltage
Definite value and less than overvoltage protection setting value when, electrical switch described in the output control of the voltage feedback module is connected and is operated in
Linear amplification region, the audion (Q3) are operated in linear amplification region, and P-MOS pipes (Q1) is operated in the range of linearity, with
The change of input voltage, the drain-source voltage across poles V of P-MOS pipes (Q1)DSChange therewith, finally make output voltage VOMaintain
Near output voltage setting value；(3) when input voltage is more than overvoltage protection setting value, the overvoltage protective module works,
Which promotes electrical switch to connect and fully on, so that the audion (Q3) cut-off, then cut P-MOS pipes (Q1)
Only, output voltage VOIt is rapid to reduce.
As shown in Fig. 2 the grid source electrode protection module can include stabilivolt DZ2 and the biasing resistor R3 being in parallel, institute
The negative pole for stating stabilivolt DZ2 connects the source electrode of the P-MOS pipes Q1, and the positive pole of the stabilivolt DZ2 connects the P-MOS pipes Q1
Grid.The parameter of stabilivolt DZ2 is chosen and Q1 source-drain voltages can be protected to be defined not over device limit value by stabilivolt DZ2,
Its value is chosen according to the data book of Q1.Biasing resistor R3 provides cut-off bias voltage for the grid source electrode of P-MOS.
The electrical switch can adopt audion Q2, and the base stage of the audion Q2 is the control of the electrical switch
End.The audion Q2 preferably adopts NPN type triode, its colelctor electrode to connect the base stage of the audion Q3, and its emitter stage connects
Connect reference ground.
The audion Q3 is preferably NPN type triode, and its colelctor electrode connects the grid current-limiting resistance R4, its emitter stage
Connection reference ground.When input voltage is in the range of normal working voltage, there is electric current to flow through current-limiting resistance R2 and audion Q3
BE levels, the CE levels of Q3 are in fully on or linear amplification region, and now the grid voltage of P-MOS pipes Q1 is pulled low, described
Reduction voltage circuit unit has voltage output.
The voltage feedback module can include stabilivolt DZ3 and the reverse flow limiting resistance R5 being in series, the stabilivolt
The negative pole of DZ3 connects the drain electrode of the P-MOS pipes Q1, and the positive pole of the stabilivolt DZ3 connects the reverse flow limiting resistance R5's
One end, the other end of the reverse flow limiting resistance R5 connect the control end of the electrical switch, the stable electricity of the stabilivolt DZ3
Pressure value output voltage values V according to needed for the reduction voltage circuit unitOChoose, the output of preferably equal to described reduction voltage circuit unit
Voltage setting value, for cascade circuit, the burning voltage of the stabilivolt DZ3 of reduction voltage circuit unit described in afterbody
Output voltage values of the value according to needed for the LED blood pressure lowerings drive circuit (are the supply voltage of its LED modules needs to be driven
Value) setting.When the LED blood pressure lowerings drive circuit only has reduction voltage circuit unit described in one-level, the LED blood pressure lowerings drive circuit
Output voltage setting value is the output voltage setting value of the reduction voltage circuit unit.When the input electricity of the reduction voltage circuit unit
Force down in VOWhen, stabilivolt DZ3 is not turned on, and the voltage feedback module is not exported, the output electricity of the reduction voltage circuit unit
Pressure is not affected by the voltage feedback module, is increased with input voltage and is increased；When input voltage is higher than VOWhen and continue rise
Gao Shi, stabilivolt DZ3 are gradually turned on, and have electric current to flow through the BE levels of R5 and audion Q2, so as to adjust the colelctor electrode (i.e. C poles) of Q2
Voltage, namely base stage (the i.e. B poles) voltage of Q3 is adjusted, the working condition of Q3 changes the DS change in voltage for causing P-MOS pipe Q1, most
Whole maintenance module voltage output is near DZ3 numerical value.
The overvoltage protective module preferably includes the stabilivolt DZ1 being in series and reverse flow limiting resistance R1, the stabilivolt
The negative pole of DZ1 connects the source electrode of the P-MOS pipes Q1, and the positive pole of the stabilivolt DZ1 connects the reverse flow limiting resistance R1's
One end, the other end of the reverse flow limiting resistance R1 connect the control end of the electrical switch, the stable electricity of the stabilivolt DZ1
Pressure value (as overvoltage protection setting value) is more than the output voltage setting value of its place reduction voltage circuit unit.When input voltage exceedes
After the stable voltage of stabilivolt DZ1, as the continuation of input voltage increases, will have current flowing resistance R1's and audion Q2
BE knots ultimately result in Q2 conductings, and the base voltage of audion Q3 is pulled low causes Q3 to end, due to inclined in grid source electrode protection circuit
The effect of resistance R3 is put, Q1 cut-offs, circuit output voltage are reduced rapidly.
When reduction voltage circuit unit described in the LED blood pressure lowerings drive circuit only one of which, in the reduction voltage circuit unit also
Filter capacitor C1 and counnter attack diode D1 (as shown in Figure 2) can be included, when which contains multiple reduction voltage circuit units for mutually cascading
When, filter capacitor C1 and counnter attack diode D1 can also be included at least in reduction voltage circuit unit described in the first order.
The connected mode of the filter capacitor and counnter attack diode is preferably：The negative pole connection of the counnter attack diode is corresponding
The P-MOS pipes Q1 source electrode, the filter capacitor is connected between the positive pole and reference ground of the counnter attack diode, described
The positive terminal of counnter attack diode is configured to the voltage input end of the reduction voltage circuit unit.
The LED blood pressure lowerings drive circuit can also include DC source, and the positive pole of the DC source is connected to unique one
The positive terminal of the counnter attack diode of the individual reduction voltage circuit unit, or it is connected to multiple reduction voltage circuit units for mutually cascading
The positive terminal of the counnter attack diode of reduction voltage circuit unit described in the middle first order.Positive supply Vin electric capacity C1 and anti-after filtering
After anti-diode D1, the source of P-MOS pipe Q1 is connected to by overvoltage protective module, grid electrode drive module and grid source electrode protection module
Pole.
Fig. 3 is that input direct voltage scans analogous diagram, and this artificial circuit output voltage setting value is 8.5V, and overvoltage protection sets
Definite value is 18V, and input voltage sweep limitss are 0 to 24V, and stepping is 2V.It can be seen that arriving 9V input voltage models 4
In enclosing, output voltage can follow input voltage well, be that LED low voltage startings create good condition；It is electric 10 to 18V
In the range of pressure, output voltage is constant for 8.5V, and this scope is constant pressure output；After input voltage is higher than 18V, output is gradually
Close, overvoltage protection is effective.
Fig. 4 is ambient temperature sweep voltage output analogous diagram, when three curves are respectively -40 DEG C ,+25 DEG C and+85 DEG C
Voltage output curve, now input voltage is 13.5V, it can be seen that output voltage is substantially constant at 8.5V up and down, can
See that reduction voltage circuit is insensitive to temperature change.
Claims (9)
1. a kind of LED blood pressure lowerings drive circuit, it is characterised in that：It is including the reduction voltage circuit unit that one or more mutually cascade, described
Reduction voltage circuit unit includes P-MOS pipes (Q1), electrical switch, overvoltage protective module, grid source electrode protection module, grid electrode drive module
And voltage feedback module, the grid source electrode protection module is connected between the grid and source electrode of P-MOS pipe (Q1), the mistake
Pressure protection module is connected between the source electrode and the control end of the electrical switch of P-MOS pipes (Q1), the Voltage Feedback
Module is connected between the drain electrode of P-MOS pipes (Q1) and the control end of the electrical switch, the grid electrode drive module bag
Current-limiting resistance (R2) and audion (Q3) are included, current-limiting resistance (R2) is connected to the source electrode and audion of P-MOS pipes (Q1)
(Q3), between base stage, audion (Q3) is connected between the grid and reference ground of P-MOS pipe (Q1), audion (Q3) with
Grid current-limiting resistance (R4) is connected between the grid of P-MOS pipes (Q1), the electrical switch is connected to the audion
(Q3) between base stage and reference ground.
2. LED blood pressure lowerings drive circuit as claimed in claim 1, it is characterised in that：The grid source electrode protection module is included mutually simultaneously
The stabilivolt (DZ2) and biasing resistor (R3) of connection, the negative pole of the stabilivolt (DZ2) connect the source electrode of P-MOS pipes (Q1),
The positive pole of the stabilivolt (DZ2) connects the grid of P-MOS pipes (Q1).
3. LED blood pressure lowerings drive circuit as claimed in claim 1, it is characterised in that：The voltage feedback module includes being in series
Stabilivolt (DZ3) and reverse flow limiting resistance (R5), the negative pole of the stabilivolt (DZ3) connects the leakage of P-MOS pipes (Q1)
Pole, the positive pole of the stabilivolt (DZ3) connect one end of the reverse flow limiting resistance (R5), the reverse flow limiting resistance (R5)
The other end connects the control end of the electrical switch, and the stable voltage of the stabilivolt (DZ3) is according to the reduction voltage circuit list
Output voltage needed for unit is chosen.
4. LED blood pressure lowerings drive circuit as claimed in claim 2, it is characterised in that：The overvoltage protective module includes being in series
Stabilivolt (DZ1) and reverse flow limiting resistance (R1), the negative pole of the stabilivolt (DZ1) connects the source of P-MOS pipes (Q1)
Pole, the positive pole of the stabilivolt (DZ1) connect one end of the reverse flow limiting resistance (R1), the reverse flow limiting resistance (R1)
The other end connects the control end of the electrical switch, and the stable voltage of the stabilivolt (DZ1) is more than its place reduction voltage circuit
The output voltage setting value of unit.
5. LED blood pressure lowerings drive circuit as claimed in claim 1, it is characterised in that：The electrical switch adopts audion (Q2),
The base stage of the audion (Q2) is the control end of the electrical switch.
6. LED blood pressure lowerings drive circuit as claimed in claim 5, it is characterised in that：The audion (Q2) is using three pole of NPN type
Pipe, its colelctor electrode connect the base stage of the audion (Q3), and its emitter stage connects reference ground.
7. LED blood pressure lowerings drive circuit as claimed in claim 1, it is characterised in that：The audion (Q3) is three pole of NPN type
Pipe, its colelctor electrode connect the grid current-limiting resistance (R4), and its emitter stage connects reference ground.
8. LED blood pressure lowering drive circuits as described in claim 1,2,3,4,5,6 or 7, it is characterised in that：When its only one of which institute
When stating reduction voltage circuit unit, also include filter capacitor and counnter attack diode in the reduction voltage circuit unit, when which contains multiple phases
During the reduction voltage circuit unit of cascade, at least in reduction voltage circuit unit described in the first order, also include filter capacitor and counnter attack diode,
The connected mode of the filter capacitor and counnter attack diode is：The corresponding P-MOS of negative pole connection of the counnter attack diode
The source electrode of pipe (Q1), the filter capacitor are connected between the positive pole and reference ground of the counnter attack diode, two pole of the counnter attack
The positive terminal of pipe is configured to the voltage input end of the reduction voltage circuit unit.
9. LED blood pressure lowerings drive circuit as claimed in claim 8, it is characterised in that：Also include DC source, the DC source
Positive pole be connected to reduction voltage circuit unit described in only one the counnter attack diode positive terminal, or be connected to multiple phases
The positive terminal of the counnter attack diode of reduction voltage circuit unit described in the first order in the reduction voltage circuit unit of cascade.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621107409.4U CN206077778U (en) | 2016-10-09 | 2016-10-09 | LED blood pressure lowering drive circuits |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621107409.4U CN206077778U (en) | 2016-10-09 | 2016-10-09 | LED blood pressure lowering drive circuits |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206077778U true CN206077778U (en) | 2017-04-05 |
Family
ID=58441825
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621107409.4U Active CN206077778U (en) | 2016-10-09 | 2016-10-09 | LED blood pressure lowering drive circuits |
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| CN (1) | CN206077778U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107705742A (en) * | 2017-09-28 | 2018-02-16 | 惠科股份有限公司 | Display panel's drive circuit and display device |
| CN109921629A (en) * | 2019-03-14 | 2019-06-21 | 广州市红鹏直升机遥感科技有限公司 | Holder for aerial photographing power supply system |
| CN110071493A (en) * | 2019-04-25 | 2019-07-30 | 西安芯派电子科技有限公司 | A kind of adjustable circuit current-limiting method of current-limiting zone and current-limiting circuit |
| US11069287B2 (en) * | 2019-01-03 | 2021-07-20 | Hefei Xinsheng Optoelectronics Technology Co., Ltd. | Driver control circuit and display device |
| WO2022048293A1 (en) * | 2020-09-04 | 2022-03-10 | 欣旺达电动汽车电池有限公司 | Soft turn-off active clamp protection circuit and power system |
-
2016
- 2016-10-09 CN CN201621107409.4U patent/CN206077778U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107705742A (en) * | 2017-09-28 | 2018-02-16 | 惠科股份有限公司 | Display panel's drive circuit and display device |
| US11069287B2 (en) * | 2019-01-03 | 2021-07-20 | Hefei Xinsheng Optoelectronics Technology Co., Ltd. | Driver control circuit and display device |
| CN109921629A (en) * | 2019-03-14 | 2019-06-21 | 广州市红鹏直升机遥感科技有限公司 | Holder for aerial photographing power supply system |
| CN110071493A (en) * | 2019-04-25 | 2019-07-30 | 西安芯派电子科技有限公司 | A kind of adjustable circuit current-limiting method of current-limiting zone and current-limiting circuit |
| WO2022048293A1 (en) * | 2020-09-04 | 2022-03-10 | 欣旺达电动汽车电池有限公司 | Soft turn-off active clamp protection circuit and power system |
| EP4191856A4 (en) * | 2020-09-04 | 2024-01-24 | Sunwoda Mobility Energy Technology Co., Ltd. | Soft turn-off active clamp protection circuit and power system |
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