CN219718533U - Control circuit for quick power-off - Google Patents
Control circuit for quick power-off Download PDFInfo
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- CN219718533U CN219718533U CN202222801462.6U CN202222801462U CN219718533U CN 219718533 U CN219718533 U CN 219718533U CN 202222801462 U CN202222801462 U CN 202222801462U CN 219718533 U CN219718533 U CN 219718533U
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- 238000004804 winding Methods 0.000 claims abstract description 43
- 230000009466 transformation Effects 0.000 claims abstract description 14
- 230000001276 controlling effect Effects 0.000 claims abstract description 7
- 230000001105 regulatory effect Effects 0.000 claims abstract description 4
- 239000003990 capacitor Substances 0.000 claims description 21
- 230000007423 decrease Effects 0.000 claims description 4
- 230000001131 transforming effect Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 4
- 230000008033 biological extinction Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Abstract
The utility model discloses a control circuit for quick power failure, which comprises an input power supply, a switch module, a transformation module, a control module, a power failure module and a lamplight module, wherein the control module comprises a PWM IC, one pin of the PWM IC is connected with the switch module, the other pin is connected with the power failure module, the control module is used for controlling the on-off of the switch module, the transformation module comprises a three-winding transformer T1, one end of a first winding group T1A is connected with the input power supply, the other end of the first winding group T1A is connected with the switch module, the transformation module is used for outputting different voltages and inputting the different voltages to the lamplight module, the switch module comprises a first MOS tube Q1 which is used for jointly regulating the voltage of the three-winding transformer T1 with the control module, the input end of the power failure module is connected with a VCC pin of the control module, and when the power supply voltage is lower than the starting voltage of the control module, the control module and the lamplight module is jointly controlled by the control module, so that a light emitting diode is quickly extinguished.
Description
Technical Field
The utility model relates to the technical field of light control, in particular to a control circuit for quick power failure.
Background
When the input voltage is turned off, the voltage of the primary winding T1A of the T1 is reduced, the VCC power supply voltage of the driving IC is kept for a period of time, the driving of the IC is output in a short time, the LED power supply driver also can continue to work, and the work of the driver is unstable, so that the connected LED lamp is turned off after a period of time, or a flickering phenomenon occurs.
Aiming at the problems, a circuit for rapidly stopping working when power is off is needed, and the problem that when the input voltage of an LED power supply driver is turned off, lamps flash and some lamps are turned off after a period of time is solved.
Disclosure of Invention
In view of the above, the present utility model aims at overcoming the drawbacks of the prior art, and its primary objective is to provide a control circuit for quick power-off, which has a simple structure and low cost, and can realize quick extinction of light emitting diodes. In order to achieve the above purpose, the present utility model adopts the following technical scheme:
the control circuit comprises an input power supply, a switch module, a transformation module, a control module, a power-off module and a light module, and is characterized in that the control module comprises a PWMIC, one pin of the PWM IC is connected with the switch module, the other pin of the PWM IC is connected with the power-off module, and the control module is used for controlling the on-off of the switch module; the transformation module comprises a three-winding transformer T1, wherein the three-winding transformer T1 comprises a first winding group T1A, a second winding group T1B and a third winding group T1C, one end of the first winding group T1A is connected with the input power supply, the other end of the first winding group T1A is connected with the switch module, and the transformation module is used for outputting different voltages and inputting the voltages to the light module; the switch module comprises a first MOS tube Q1 which is used for regulating the voltage of the three-winding transformer T1 in combination with the control module; the power-off module is used for controlling the power supply voltage of the control module, the input end of the power-off module is connected with the T1B, and the output end of the power-off module is connected with the VCC pin of the control module; when the power supply voltage is lower than the starting voltage of the control module, the control module and the transformation module jointly control the light module, so that the light emitting diode is quickly extinguished.
Preferably, the power-off module includes a second triode Q2, a second zener diode ZD2, a fourth MOS transistor Q4, a third triode Q3, a first capacitor C1, a first zener diode ZD1, a first resistor R1 and a second resistor R2, a drain electrode of the first MOS transistor Q1 is grounded, a source electrode of the first MOS transistor Q1 is connected with one end of the first winding group T1A, and a gate electrode of the first MOS transistor Q1 is connected with one pin of the PWM IC.
Preferably, the emitter of the second triode Q2 is connected to the Vcc pin of the PWM IC, the collector of the second triode Q2 is connected to the cathode of the first diode D1, the base of the second triode Q2 is connected to the cathode of the second zener diode ZD2, the anode of the second zener diode ZD2 is connected to the source of the fourth MOS transistor Q4, and the drain of the fourth MOS transistor Q4 is grounded.
Preferably, the gate of the fourth MOS transistor Q4 is connected to the collector of the third triode Q3, the emitter of the third triode Q3 is grounded, the base of the third triode Q3 is connected to one end of the first capacitor C1, and the third triode Q3 is connected in series with a third resistor R3.
Preferably, the cathode of the first zener diode ZD1 is connected to the cathode of the first diode D1, and the anode of the first zener diode ZD1 is connected in series with the first resistor R1 and the second resistor R2.
Preferably, the lighting module includes a second diode D2, a third capacitor C3, and a light emitting diode LED, where an anode of the second diode D2 is connected to one end of the third winding set T1C, a cathode of the second diode D2 is connected to an anode of the third capacitor C3, a cathode of the third capacitor C3 is grounded, and an anode of the light emitting diode LED is connected to an anode of the third capacitor C3, and a cathode of the light emitting diode LED is grounded.
Preferably, the control circuit for quick power-off further includes a rectifying module, the rectifying module includes a first diode D1, a second capacitor C2, a fourth resistor R4, and a third zener diode ZD3, an anode of the first diode D1 is connected to one end of the second winding set T1B, a cathode of the first diode D1 is connected to one end of the fourth resistor R4 and an anode of the second capacitor C2, a cathode of the third zener diode ZD3 is connected to the other end of the fourth resistor R4, and an anode of the third zener diode ZD3 is connected to a drain of the fourth MOS transistor Q4.
Preferably, the rectifying module is used for converting the alternating voltage input by the transforming module into direct voltage and inputting the direct voltage into a power supply voltage pin of the control module.
Preferably, when the input power is turned off by the first MOS transistor Q1, the voltage of the first winding group T1A decreases, the voltage of the second winding group T1B also decreases, and the power supply voltage of the PWM IC is pulled down below the power supply voltage on voltage by the operating circuit of the power-off module, and at the same time, the driving of the PWM IC is turned off.
In order to more clearly illustrate the structural features and efficacy of the present utility model, the present utility model will be described in detail below with reference to the accompanying drawings and examples.
Drawings
FIG. 1 is a block diagram of a control circuit for a quick power down of the present utility model;
fig. 2 is a schematic diagram of a control circuit for a quick power-off according to the present utility model.
Detailed Description
To make the object, technical proposal and advantages of the utility model more clear, the following are combined with
The present utility model will be described in further detail with reference to the drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
It is noted that when an element is referred to as being "secured to" another element, it can be directly on the other element
There may be a central element on one element or the like. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only.
Referring to fig. 1, an embodiment of the present utility model provides a block diagram of a fast power-off control circuit, which includes an input power source (VBLUK), a switch module 4, a transformer module 5, a control module 1, a power-off module 2, a rectifying module 3 and a light module 6. The control module 1 comprises a PWM IC, one pin of the PWM IC is connected with the switch module 4, the other pin of the PWM IC is connected with the power-off module 2, and the control module 1 is used for controlling the on-off of the switch module 4; the voltage transformation module 5 comprises a three-winding transformer T1, the three-winding transformer T1 comprises a first winding group T1A, a second winding group T1B and a third winding group T1C, wherein one end of the first winding group T1A is connected with the input power supply (VBLUK), the other end is connected with the switch module 4, and the voltage transformation module 5 is used for outputting different voltages and inputting the different voltages to the light module 6; the switch module 4 comprises a first MOS tube Q1 which is used for regulating the voltage of the three-winding transformer T1 in combination with the control module; the power-off module 2 is used for controlling the power supply Voltage (VCC) of the control module 14, the input end of the power-off module is connected with the T1B, and the output end of the power-off module is connected with the VCC pin of the control module 1; when the power supply Voltage (VCC) is lower than the starting voltage of the control module 1, the control module 1 and the transformation module jointly control the light module 6, so as to rapidly extinguish the light emitting diode.
Referring to fig. 2, the embodiment of the utility model provides a schematic diagram of a control circuit for fast power-off, specifically, the power-off module 2 includes a second triode Q2, a second zener diode ZD2, a fourth MOS transistor Q4, a third triode Q3, a first capacitor C1, a first zener diode ZD1, a first resistor R1 and a second resistor R2, a drain electrode of the first MOS transistor Q1 is grounded, a source electrode of the first MOS transistor Q1 is connected to one end of the first winding group T1A, and a gate electrode of the first MOS transistor Q1 is connected to one pin of the PWM IC. The emitter of the second triode Q2 is connected with the Vcc pin of the PWM IC, the collector of the second triode Q2 is connected with the cathode of the first diode D1, the base of the second triode Q2 is connected with the cathode of the second zener diode ZD2, the anode of the second zener diode ZD2 is connected with the source of the fourth MOS tube Q4, and the drain of the fourth MOS tube Q4 is grounded. The grid of fourth MOS pipe Q4 is connected in the collecting electrode of third triode Q3, the projecting electrode ground connection of third triode Q3, third triode Q3's base connect in the one end of first electric capacity C1, third triode Q3 has concatenated third resistance R3. The cathode of the first zener diode ZD1 is connected to the cathode of the first diode D1, and the anode of the first zener diode ZD1 is connected in series with the first resistor R1 and the second resistor R2.
The light module 6 includes a second diode D2, a third capacitor C3, and a light emitting diode LED, where an anode of the second diode D2 is connected to one end of the third winding set T1C, a cathode of the second diode D2 is connected to an anode of the third capacitor C3, a cathode of the third capacitor C3 is grounded, and an anode of the light emitting diode LED is connected to an anode of the third capacitor C3, and a cathode of the light emitting diode LED is grounded.
The control circuit of quick outage still includes rectifier module 3, rectifier module 3 includes first diode D1, second electric capacity C2, fourth resistance R4 and third zener diode ZD3, first diode D1's positive pole connect in the one end of second wire winding group T1B, first diode D1's negative pole is connected fourth resistance R4's one end and the positive pole of second electric capacity C2, the negative pole of third zener diode ZD3 is connected the other end of fourth resistance R4, the drain electrode of fourth MOS pipe Q4 is connected to third zener diode ZD 3's positive pole. The rectifying module 3 is configured to convert the ac voltage input by the transforming module 5 into a dc voltage and input the dc voltage to a power supply Voltage (VCC) pin of the control module 1.
When the input power supply (VBLUK) is turned off by the first MOS transistor Q1, the voltage of the first winding set T1A is reduced, the voltage of the second winding set T1B is also reduced, and the power supply Voltage (VCC) of the PWM IC is pulled down below the power supply Voltage (VCC) turn-on voltage by the operating circuit of the power-off module 2, and meanwhile, the driving of the PWM IC is turned off, so that the light emitting diode in the light module 6 is turned off rapidly.
The above description is only of the preferred embodiments of the present utility model and is not intended to limit the utility model, but any modifications, equivalents, improvements, etc. within the principles of the present utility model should be included in the scope of the present utility model.
Claims (9)
1. The control circuit comprises an input power supply, a switch module, a transformation module, a control module, a power-off module and a lamplight module, and is characterized in that the control module comprises a PWM IC, one pin of the PWM IC is connected with the switch module, the other pin of the PWM IC is connected with the power-off module, and the control module is used for controlling the on-off of the switch module;
the transformation module comprises a three-winding transformer T1, wherein the three-winding transformer T1 comprises a first winding group T1A, a second winding group T1B and a third winding group T1C, one end of the first winding group T1A is connected with the input power supply, the other end of the first winding group T1A is connected with the switch module, and the transformation module is used for outputting different voltages and inputting the voltages to the light module;
the switch module comprises a first MOS tube Q1 which is used for regulating the voltage of the three-winding transformer T1 in combination with the control module;
the power-off module is used for controlling the power supply voltage of the control module, the input end of the power-off module is connected with the T1B, and the output end of the power-off module is connected with the VCC pin of the control module;
when the power supply voltage is lower than the starting voltage of the control module, the control module and the transformation module jointly control the light module, so that the light emitting diode is quickly extinguished.
2. The control circuit of claim 1, wherein the power-off module comprises a second triode Q2, a second zener diode ZD2, a fourth MOS transistor Q4, a third triode Q3, a first capacitor C1, a first zener diode ZD1, a first resistor R1 and a second resistor R2, the drain of the first MOS transistor Q1 is grounded, the source of the first MOS transistor Q1 is connected to one end of the first winding group T1A, and the gate of the first MOS transistor Q1 is connected to one pin of the PWM IC.
3. The control circuit of claim 2, wherein an emitter of the second triode Q2 is connected to a Vcc pin of the PWM IC, a collector of the second triode Q2 is connected to a cathode of the first diode D1, a base of the second triode Q2 is connected to a cathode of the second zener diode ZD2, an anode of the second zener diode ZD2 is connected to a source of the fourth MOS transistor Q4, and a drain of the fourth MOS transistor Q4 is grounded.
4. The control circuit of claim 2, wherein the gate of the fourth MOS transistor Q4 is connected to the collector of the third transistor Q3, the emitter of the third transistor Q3 is grounded, the base of the third transistor Q3 is connected to one end of the first capacitor C1, and the third transistor Q3 is connected in series with a third resistor R3.
5. The rapid power-off control circuit according to claim 2, wherein the cathode of the first zener diode ZD1 is connected to the cathode of the first diode D1, and the anode of the first zener diode ZD1 is connected in series with the first resistor R1 and the second resistor R2.
6. The rapid power-off control circuit according to claim 1, wherein the light module comprises a second diode D2, a third capacitor C3 and a light emitting diode LED, the anode of the second diode D2 is connected to one end of the third winding group T1C, the cathode of the second diode D2 is connected to the anode of the third capacitor C3, the cathode of the third capacitor C3 is grounded, the anode of the light emitting diode LED is connected to the anode of the third capacitor C3, and the cathode of the light emitting diode LED is grounded.
7. The control circuit for quick power-off according to claim 3, further comprising a rectifying module, wherein the rectifying module comprises a first diode D1, a second capacitor C2, a fourth resistor R4 and a third zener diode ZD3, an anode of the first diode D1 is connected to one end of the second winding set T1B, a cathode of the first diode D1 is connected to one end of the fourth resistor R4 and an anode of the second capacitor C2, a cathode of the third zener diode ZD3 is connected to the other end of the fourth resistor R4, and an anode of the third zener diode ZD3 is connected to a drain of the fourth MOS transistor Q4.
8. The rapid power-down control circuit according to claim 7, wherein the rectifying module is configured to convert an ac voltage input from the transforming module into a dc voltage and input the dc voltage to a supply voltage pin of the control module.
9. The circuit according to claim 1, wherein when the input power is turned off by the first MOS transistor Q1, the voltage of the first winding T1A decreases, the voltage of the second winding T1B decreases, and the supply voltage of the PWM IC is pulled down below the supply voltage turn-on voltage by the operating circuit of the power-off module, and the driving of the PWM IC is turned off.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222801462.6U CN219718533U (en) | 2022-10-24 | 2022-10-24 | Control circuit for quick power-off |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222801462.6U CN219718533U (en) | 2022-10-24 | 2022-10-24 | Control circuit for quick power-off |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219718533U true CN219718533U (en) | 2023-09-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222801462.6U Active CN219718533U (en) | 2022-10-24 | 2022-10-24 | Control circuit for quick power-off |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219718533U (en) |
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2022
- 2022-10-24 CN CN202222801462.6U patent/CN219718533U/en active Active
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