CN109819548A - A kind of PWM constant-current dimming circuit of 60-200V high-voltage LED lamp bead - Google Patents
A kind of PWM constant-current dimming circuit of 60-200V high-voltage LED lamp bead Download PDFInfo
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- CN109819548A CN109819548A CN201811604757.6A CN201811604757A CN109819548A CN 109819548 A CN109819548 A CN 109819548A CN 201811604757 A CN201811604757 A CN 201811604757A CN 109819548 A CN109819548 A CN 109819548A
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Abstract
The invention discloses a kind of PWM constant-current dimming circuits of 60-200V high-voltage LED lamp bead, comprising: voltage comparator circuit buffers filter circuit and 2uS single-shot trigger circuit with door chip circuit, drive signal level translation circuit, LED decompression transformation driving circuit, current detecting；Wherein, voltage comparator circuit is connect with door chip circuit；PWM input signal is received with door chip circuit, it is described to be connect with door chip circuit with drive signal level translation circuit；2uS single-shot trigger circuit is connect with voltage comparator circuit and current detecting buffering filter circuit respectively；Drive signal level translation circuit is connect with LED decompression transformation driving circuit；Current detecting buffering filter circuit is connect with LED decompression transformation driving circuit.Its reliable working performance is stablized.
Description
Technical field
The invention belongs to the technical fields of PWM (Pulse Width Modulation, pulse width modulation) light modulation, specifically
It is related to a kind of PWM constant-current dimming circuit of 60-200V high-voltage LED lamp bead.
Background technique
At present there are mainly three types of light regulating technologies: PWM light modulation, simulation light modulation and digital dimming.Many LED in the market
(Light Emitting Diode, light emitting diode) driver can support one such or a variety of light regulating technologies.
PWM dimming mode is a kind of light regulating technology for switching White LED Driver repeatedly using simple digit pulse.Application person's
System only needs to provide wide, narrow different digital type pulse, change output electric current can be simply implemented, to adjust white light
The brightness of LED.
PWM in existing LED drive circuit is dimmed or that simulation light modulation is usually used is balance chip (Balance
IC), the duty ratio (Duty) that output electric current is adjusted by the internal module of the chip achievees the purpose that the brightness for adjusting LED.It passes
The light adjusting circuit of system, HV9910B circuit as shown in Figure 1, using 8~450V wide input voltage, open loop peak point current
Control mode, current waveform becomes extremely unstable when driving high pressure (60~200V LED) high-power (> 250W), be easy to cause
LED lamp bead flashing or damage.
Summary of the invention
The invention aims to solve existing traditional circuit power supply instability, a kind of 60-200V is provided
The PWM constant-current dimming circuit of high-voltage LED lamp bead, reliable working performance are stablized.
To solve the above-mentioned problems, the present invention is achieved by following technical scheme:
A kind of PWM constant-current dimming circuit of 60-200V high-voltage LED lamp bead of the present invention, comprising:
Voltage comparator circuit is examined with door chip circuit, drive signal level translation circuit, LED decompression transformation driving circuit, electric current
Survey buffering filter circuit and 2uS single-shot trigger circuit；
Wherein, voltage comparator circuit is connect with door chip circuit；
PWM input signal is received with door chip circuit, it is described to be connect with door chip circuit with drive signal level translation circuit；
2uS single-shot trigger circuit is connect with voltage comparator circuit and current detecting buffering filter circuit respectively；
Drive signal level translation circuit is connect with LED decompression transformation driving circuit；
Current detecting buffering filter circuit is connect with LED decompression transformation driving circuit.
Further, the voltage comparator circuit includes voltage comparator U1, resistance R1, resistance R2 and adjustable potentiometer
VR1；The output end of the voltage comparator U1 respectively and with the INA input terminal of door chip circuit, 2uS single-shot trigger circuit
The connection of the end TR.
Further, the PWM constant-current dimming circuit further includes power supply input circuit；Wherein,
The non-inverting input terminal of one end connection voltage comparator U1 of the resistance R1, the other end, the voltage comparator U1 of resistance R1
The end VCC and connect respectively with power supply input circuit with the end VCC of door chip circuit；
The resistance R2 one end connection voltage comparator U1 non-inverting input terminal, the other end of resistance R2 with door chip circuit
INA input terminal connection；
The non-inverting input terminal of the adjustable potentiometer VR1 connection voltage comparator U1, the other end ground connection of adjustable potentiometer VR1；
The end Q of the inverting input terminal connection 2uS single-shot trigger circuit of the voltage comparator U1.
Further, described to be connected with a pwm signal input circuit with door chip circuit INB input terminal；The PWM letter
Number input circuit can input the PWM pulse-width signal of 0~25KHZ.
Further, described to be connect with the output end of door chip circuit with drive signal level translation circuit, the LED drop
It includes resistance R5, field-effect tube Q1, diode D3 and inductance L1 that buckling, which changes driving circuit,；
Wherein, the output end of the grid connection drive signal level translation circuit of the field-effect tube Q1, the source of field-effect tube Q1
Pole connects current detecting and buffers filter circuit, and the drain electrode of field-effect tube Q1 is separately connected external LED lamp group, resistance R5 and diode
One end of D3；
The other end of the resistance R5 is separately connected one end of inductance L1 and the other end of LED light group；The diode D3's is another
One end connects power supply input circuit；The other end of the inductance L1 connects power supply input circuit.
Further, the current detecting buffering filter circuit removal current spike and clutter；The current detecting buffering
Filter circuit includes resistance R4, RCS1 and capacitor C1；
Wherein, the end Q of one end connection 2uS single-shot trigger circuit of the capacitor C1, the other end ground connection of capacitor C1；
The end Q of one end connection 2uS single-shot trigger circuit of the resistance R4, the other end connection field-effect tube Q1's of resistance R4
Source electrode；
The source electrode of one end connection field-effect tube Q1 of the RCS1, the other end ground connection of RCS1.
Further, the power supply input circuit includes that successively supply convertor interconnected ,+15V linear voltage decreasing are steady
Volt circuit and+5V linear voltage decreasing voltage regulator circuit；
Institute's supply convertor is connect with external power supply, is provided+135V power supply and is given+15V linear voltage decreasing voltage regulator circuit；
Offer+15V power supply is electric to+5V linear voltage decreasing voltage regulator circuit and driving signal respectively for the+15V linear voltage decreasing voltage regulator circuit
Flat translation circuit connection；
+ 5V linear voltage decreasing voltage regulator circuit offer+5V the power supply is to voltage comparator circuit and door chip circuit and 2uS monostable
Trigger circuit.
Further, the end Q of the 2uS single-shot trigger circuit is connected with the anode of diode D1, and diode D1's is negative
Pole is connect with voltage comparator circuit；
The end TR of the 2uS single-shot trigger circuit is connected with the anode of diode D2, and the cathode of diode D2 is compared with voltage
Circuit connection.
Compared with prior art, the beneficial effects of the present invention are:
The 60-200V high-voltage LED lamp bead PWM constant-current dimming innovative circuits use the circuit structure of autonomous a whole new mind, relatively
Traditional HV9910B circuit increases current detecting buffering filter circuit removal spike and clutter, and performance is more when driving high current LED
Stablize.The fixation turn-off time for forming the about 2uS of LED lamp bead by increasing 2uS single-shot trigger circuit；By increasing driving electricity
The circuit will be significantly increased to the driving capability of N ditch metal-oxide-semiconductor in flat translation circuit and+15V decompression voltage regulator, can drive 10A extremely
20A or bigger LED current；Drive high-power LED (60 ~ 200V, 250W ~ 1000W) Shi Xingneng more reliable and more stable.
Detailed description of the invention
Specific embodiments of the present invention will be described in further detail with reference to the accompanying drawing, in which:
Fig. 1 is HV9910B circuit of the invention；
Fig. 2 is a kind of total schematic diagram of the PWM constant-current dimming circuit of 60-200V high-voltage LED lamp bead of the invention；
Fig. 3 is a kind of local circuit detail view of the PWM constant-current dimming circuit of 60-200V high-voltage LED lamp bead of the invention.
Specific embodiment
Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings, it should be understood that preferred reality described herein
Apply example only for the purpose of illustrating and explaining the present invention and is not intended to limit the present invention.
As shown in Figure 2 to 3, the PWM constant-current dimming circuit of a kind of 60-200V high-voltage LED lamp bead of the present invention, packet
It includes: voltage comparator circuit 1 and door chip circuit 2, drive signal level translation circuit 5, LED decompression transformation driving circuit 8, electricity
Stream detection buffering filter circuit 9 and 2uS single-shot trigger circuit 10.The voltage comparator circuit 1 connects with door chip circuit 2
It connects；It is described to receive PWM input signal, described and door chip circuit 2 and+drive signal level translation circuit 5 with door chip circuit 2
Connection；The 2uS single-shot trigger circuit 10 is connect with voltage comparator circuit 1 and current detecting buffering filter circuit 9 respectively；Institute
Drive signal level translation circuit 5 is stated to connect with LED decompression transformation driving circuit 8；Current detecting buffering filter circuit 9 with
LED decompression transformation driving circuit 8 connects.
The system of each function mould of the invention forms:
Voltage comparator circuit is made of electrical components such as U1, R1, R2, VR1, and U1 is the voltage comparator chip with push-pull output,
Chip VCC voltage is provided by+5V linear voltage decreasing voltage regulator circuit, and VR1 is potentiometer, collectively forms Schmidt's characteristic with positive feedback
Voltage comparator circuit, in-phase end be the adjustable comparison voltage of 0~0.2V, reverse side be current detecting buffer filter circuit letter
Number, when reverse side voltage is lower than in-phase end voltage, comparator output is high level, when reverse side voltage is higher than in-phase end voltage
When, comparator output is low level.
It is the composition of U1 Yu door chip with door chip circuit, two input terminal one end are connected to the output of voltage comparator circuit
End, one end is connected to pwm signal input circuit.Use pwm signal input as the switching signal with door chip circuit, when PWM is defeated
It is high level with the output of door chip circuit when entering the output signal of signal and voltage comparator chip circuit and being high level, when
It is low level with the output of door chip circuit when PWM input signal is low level.
Pwm signal input circuit can input the PWM pulse-width signal of 0 ~ 25KHZ.
Current detecting buffering filter circuit is made of RCS1, R4, C1, and R4 and C1 constitute RC filter circuit, removal electric current point
Peak and clutter, performance is more stable when driving high current.
+ 135 input voltages are depressurized to+15V and provide power to+5V to+15V driving letter by+15V linear voltage decreasing voltage regulator circuit
Number level-conversion circuit.
The pulse signal of+5V the amplitude exported with door chip circuit is transformed into+15V width by drive signal level translation circuit
The pulse signal of value is to drive N ditch power MOS pipe.
+ 5V linear voltage decreasing voltage regulator circuit provides power supply by+15V decompression voltage regulator, and provides+5V power supply and compare to voltage
Circuit and door chip circuit and 2uS single-shot trigger circuit.
TR is the terminal that failing edge pulse can trigger in 2uS single-shot trigger circuit, passes through D2 cathode and voltage comparator
The output end of chip connects, and the effect of D2 is that failing edge pulse-triggered is effective, and voltage comparator chip exports high level Shi Buying
Single-shot trigger trigger is rung, is connect by D1 cathode cathode with voltage comparator chip reverse side and current detecting filter circuit, Q is defeated
Voltage comparator chip reverse phase terminal circuit is increased to 0.4V or so by high level out, and 0.2V when higher than the highest of in-phase end is electric
Pressure, the 2uS or so of voltage comparator chip continues to output low level about delay monostable multivibrator time, plays and determines turn-off time 2uS's
Delayed-action.
LED decompression transformation driving circuit is by Q1(N ditch power MOS pipe), the elements such as L1, D3, R5 form, to drive high pressure
Large-power LED light bead.
Specifically, as shown in figure 3, being specific electric diagram composition of the invention:
The voltage comparator circuit 1 includes voltage comparator U1, resistance R1, resistance R2 and adjustable potentiometer VR1；The voltage ratio
Output end compared with device U1 is connect respectively and with the end TR of the INA input terminal of door chip circuit, 2uS single-shot trigger circuit.
The PWM constant-current dimming circuit further includes power supply input circuit.Wherein, one end of the resistance R1 connects voltage ratio
Compared with the non-inverting input terminal of device U1, the other end of resistance R1, the end VCC of voltage comparator U1 and the end VCC point with door chip circuit
It is not connect with power supply input circuit.The non-inverting input terminal of one end connection voltage comparator U1 of the resistance R2, resistance R2's is another
One end is connect with the INA input terminal with door chip circuit.The homophase input of the adjustable potentiometer VR1 connection voltage comparator U1
End, the other end ground connection of adjustable potentiometer VR1.The inverting input terminal connection 2uS monostable trigger electricity of the voltage comparator U1
The end Q on road.
It is described to be connected with a pwm signal input circuit 3 with door chip circuit 2 INB input terminal.The pwm signal input
Circuit 3 can input the PWM pulse-width signal of 0~25KHZ.
Wherein, described to connect with the output end of door chip circuit with drive signal level translation circuit, the LED decompression becomes
Changing driving circuit includes resistance R5, field-effect tube Q1, diode D3 and inductance L1.Specifically, the grid of the field-effect tube Q1
The output end of drive signal level translation circuit is connected, the source electrode connection current detecting of field-effect tube Q1 buffers filter circuit, field
The drain electrode of effect pipe Q1 is separately connected one end of external LED lamp group, resistance R5 and diode D3.The other end of the resistance R5 point
It Lian Jie not one end of inductance L1 and the other end of LED light group.The other end of the diode D3 connects power supply input circuit.It is described
The other end of inductance L1 connects power supply input circuit.
Wherein, the current detecting buffering filter circuit 9 removes current spike and clutter.The current detecting buffering filtering
Circuit 9 includes resistance R4, RCS1 and capacitor C1.Specifically, the Q of one end connection 2uS single-shot trigger circuit of the capacitor C1
End, the other end ground connection of capacitor C1.The end Q of one end connection 2uS single-shot trigger circuit of the resistance R4, resistance R4's is another
The source electrode of end connection field-effect tube Q1.The source electrode of one end connection field-effect tube Q1 of the RCS1, the other end ground connection of RCS1.
Further, the power supply input circuit includes that successively supply convertor 6 interconnected ,+15V linear voltage decreasing are steady
Volt circuit 7 and+5V linear voltage decreasing voltage regulator circuit 4.Institute's supply convertor 6 is connect with external power supply, provides+135V power supply to+15V
Linear voltage decreasing voltage regulator circuit 7.Offer+15V power supply gives+5V linear voltage decreasing pressure stabilizing to the+15V linear voltage decreasing voltage regulator circuit 7 respectively
Circuit 4 and drive signal level translation circuit 5 connect.4 offer+5V the power supply of+5V linear voltage decreasing voltage regulator circuit gives voltage ratio
Compared with circuit 1 and door chip circuit 2 and 2uS single-shot trigger circuit 10.
Further, the end Q of the 2uS single-shot trigger circuit 10 is connected with the anode of diode D1, diode D1's
Cathode is connect with voltage comparator circuit.The end TR of the 2uS single-shot trigger circuit 10 is connected with the anode of diode D2, two poles
The cathode of pipe D2 is connect with voltage comparator circuit.
A kind of PWM constant-current dimming circuit working principle of 60-200V high-voltage LED lamp bead of the present invention is:
It after opening system power supply, is controlled by PWM input signal circuit 3 and is worked with door chip circuit 2, output high level is believed to driving
Number 5 progress+5V of level-conversion circuit is converted to+15V drive signal level, to drive LED decompression transformation driving circuit 8, electricity
Stream detection buffering filter circuit 9 detects that the current signal gradually risen is input to voltage comparator U1 in voltage comparator circuit 1
Reverse side, once be higher than in-phase end voltage comparison signal, voltage comparator U1 output low level pass through drive signal level
Q1 in the shutdown driving LED decompression transformation driving circuit 8 of translation circuit 5, sustained diode 1 work, the company of presentation in LED lamp bead
Continuous electric current, while the low level of voltage comparator U1 output triggers 2uS single-shot trigger circuit 10, output high level draws high electricity
It presses the reverse side voltage of comparator U1 to be higher than in-phase end voltage, so that voltage comparator U1 continues output low level, generates about 2uS
Turn-off time, the delay time one of 2uS arrives, and 2uS single-shot trigger circuit 10 exports low level, and voltage comparator U1 output is high
Level loops back and forth like this, and drive control LED decompression transformation driving circuit 8 carries out LED constant current transformation of electrical energy.Substantially expand
The lamp bead voltage and driving power of LED, performance are more reliable and more stable.
A kind of other structures of the PWM constant-current dimming circuit of 60-200V high-voltage LED lamp bead described in the present embodiment are referring to existing
Technology.
The above described is only a preferred embodiment of the present invention, be not intended to limit the present invention in any form, therefore
Without departing from the technical solutions of the present invention, according to the technical essence of the invention it is to the above embodiments it is any modification,
Equivalent variations and modification, all of which are still within the scope of the technical scheme of the invention.
Claims (8)
1. a kind of PWM constant-current dimming circuit of 60-200V high-voltage LED lamp bead characterized by comprising
Voltage comparator circuit is examined with door chip circuit, drive signal level translation circuit, LED decompression transformation driving circuit, electric current
Survey buffering filter circuit and 2uS single-shot trigger circuit；
Wherein, voltage comparator circuit is connect with door chip circuit；
PWM input signal is received with door chip circuit, it is described to be connect with door chip circuit with drive signal level translation circuit；
2uS single-shot trigger circuit is connect with voltage comparator circuit and current detecting buffering filter circuit respectively；
Drive signal level translation circuit is connect with LED decompression transformation driving circuit；
Current detecting buffering filter circuit is connect with LED decompression transformation driving circuit.
2. the PWM constant-current dimming circuit of 60-200V high-voltage LED lamp bead according to claim 1, which is characterized in that described
Voltage comparator circuit includes voltage comparator U1, resistance R1, resistance R2 and adjustable potentiometer VR1；The voltage comparator U1's
Output end is connect respectively and with the end TR of the INA input terminal of door chip circuit, 2uS single-shot trigger circuit.
3. the PWM constant-current dimming circuit of 60-200V high-voltage LED lamp bead according to claim 2, which is characterized in that described
PWM constant-current dimming circuit further includes a power supply input circuit；Wherein,
The non-inverting input terminal of one end connection voltage comparator U1 of the resistance R1, the other end, the voltage comparator U1 of resistance R1
The end VCC and connect respectively with power supply input circuit with the end VCC of door chip circuit；
The resistance R2 one end connection voltage comparator U1 non-inverting input terminal, the other end of resistance R2 with door chip circuit
INA input terminal connection；
The non-inverting input terminal of the adjustable potentiometer VR1 connection voltage comparator U1, the other end ground connection of adjustable potentiometer VR1；
The end Q of the inverting input terminal connection 2uS single-shot trigger circuit of the voltage comparator U1.
4. the PWM constant-current dimming circuit of 60-200V high-voltage LED lamp bead according to claim 3, it is characterised in that:
It is described to be connected with a pwm signal input circuit with door chip circuit INB input terminal；The pwm signal input circuit can
Input the PWM pulse-width signal of 0~25KHZ.
5. the PWM constant-current dimming circuit of 60-200V high-voltage LED lamp bead according to claim 3, it is characterised in that:
It is described to be connect with the output end of door chip circuit with drive signal level translation circuit, the LED decompression transformation driving electricity
Road includes resistance R5, field-effect tube Q1, diode D3 and inductance L1；
Wherein, the output end of the grid connection drive signal level translation circuit of the field-effect tube Q1, the source of field-effect tube Q1
Pole connects current detecting and buffers filter circuit, and the drain electrode of field-effect tube Q1 is separately connected external LED lamp group, resistance R5 and diode
One end of D3；
The other end of the resistance R5 is separately connected one end of inductance L1 and the other end of LED light group；The diode D3's is another
One end connects power supply input circuit；The other end of the inductance L1 connects power supply input circuit.
6. the PWM constant-current dimming circuit of 60-200V high-voltage LED lamp bead according to claim 5, it is characterised in that:
The current detecting buffering filter circuit removal current spike and clutter；The current detecting buffering filter circuit includes electricity
Hinder R4, RCS1 and capacitor C1；
Wherein, the end Q of one end connection 2uS single-shot trigger circuit of the capacitor C1, the other end ground connection of capacitor C1；
The end Q of one end connection 2uS single-shot trigger circuit of the resistance R4, the other end connection field-effect tube Q1's of resistance R4
Source electrode；
The source electrode of one end connection field-effect tube Q1 of the RCS1, the other end ground connection of RCS1.
7. the PWM constant-current dimming circuit of 60-200V high-voltage LED lamp bead according to claim 6, which is characterized in that
The power supply input circuit includes successively supply convertor interconnected ,+15V linear voltage decreasing voltage regulator circuit and+5V line
Property decompression voltage regulator；
Institute's supply convertor is connect with external power supply, is provided+135V power supply and is given+15V linear voltage decreasing voltage regulator circuit；
Offer+15V power supply is electric to+5V linear voltage decreasing voltage regulator circuit and driving signal respectively for the+15V linear voltage decreasing voltage regulator circuit
Flat translation circuit connection；
+ 5V linear voltage decreasing voltage regulator circuit offer+5V the power supply is to voltage comparator circuit and door chip circuit and 2uS monostable
Trigger circuit.
8. the PWM constant-current dimming circuit of 60-200V high-voltage LED lamp bead according to claim 7, it is characterised in that:
The end Q of the 2uS single-shot trigger circuit is connected with the anode of diode D1, and the cathode of diode D1 is electric compared with voltage
Road connection；
The end TR of the 2uS single-shot trigger circuit is connected with the anode of diode D2, and the cathode of diode D2 is compared with voltage
Circuit connection.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811604757.6A CN109819548A (en) | 2018-12-26 | 2018-12-26 | A kind of PWM constant-current dimming circuit of 60-200V high-voltage LED lamp bead |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811604757.6A CN109819548A (en) | 2018-12-26 | 2018-12-26 | A kind of PWM constant-current dimming circuit of 60-200V high-voltage LED lamp bead |
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| CN109819548A true CN109819548A (en) | 2019-05-28 |
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|---|---|---|---|
| CN201811604757.6A Pending CN109819548A (en) | 2018-12-26 | 2018-12-26 | A kind of PWM constant-current dimming circuit of 60-200V high-voltage LED lamp bead |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111586929A (en) * | 2020-05-28 | 2020-08-25 | 成都航天凯特机电科技有限公司 | Infrared light filling lamp circuit of VCSEL without red explosion |
| CN111669879A (en) * | 2020-07-17 | 2020-09-15 | 横店集团得邦照明股份有限公司 | Efficient PWM dimming signal detection circuit and implementation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203623152U (en) * | 2013-12-13 | 2014-06-04 | 福建鑫诺通讯技术有限公司 | Thermal printer core heating protection circuit |
| CN106788005A (en) * | 2017-03-27 | 2017-05-31 | 深圳怡化电脑股份有限公司 | Delaying current control device |
| CN108925011A (en) * | 2018-08-30 | 2018-11-30 | 广州宝善电子科技有限公司 | A kind of power expansion innovative circuits of the PWM dimming mode of MP24894 adjustable current |
| CN108966401A (en) * | 2017-05-17 | 2018-12-07 | 长沙鲁维湘机电科技有限公司 | A kind of controlled by sound and light headlamp |
-
2018
- 2018-12-26 CN CN201811604757.6A patent/CN109819548A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203623152U (en) * | 2013-12-13 | 2014-06-04 | 福建鑫诺通讯技术有限公司 | Thermal printer core heating protection circuit |
| CN106788005A (en) * | 2017-03-27 | 2017-05-31 | 深圳怡化电脑股份有限公司 | Delaying current control device |
| CN108966401A (en) * | 2017-05-17 | 2018-12-07 | 长沙鲁维湘机电科技有限公司 | A kind of controlled by sound and light headlamp |
| CN108925011A (en) * | 2018-08-30 | 2018-11-30 | 广州宝善电子科技有限公司 | A kind of power expansion innovative circuits of the PWM dimming mode of MP24894 adjustable current |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111586929A (en) * | 2020-05-28 | 2020-08-25 | 成都航天凯特机电科技有限公司 | Infrared light filling lamp circuit of VCSEL without red explosion |
| CN111669879A (en) * | 2020-07-17 | 2020-09-15 | 横店集团得邦照明股份有限公司 | Efficient PWM dimming signal detection circuit and implementation method thereof |
| CN111669879B (en) * | 2020-07-17 | 2023-06-20 | 横店集团得邦照明股份有限公司 | High-efficiency PWM dimming signal detection circuit and implementation method thereof |
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