CN210112330U - Circuit for converting continuous PWM signal into continuous high-level signal - Google Patents
Circuit for converting continuous PWM signal into continuous high-level signal Download PDFInfo
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- CN210112330U CN210112330U CN201920772261.3U CN201920772261U CN210112330U CN 210112330 U CN210112330 U CN 210112330U CN 201920772261 U CN201920772261 U CN 201920772261U CN 210112330 U CN210112330 U CN 210112330U
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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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Abstract
The utility model discloses a circuit with lasting PWM signal conversion to lasting high level signal, including resistance R1, R2, R3, R4, R5, R6, electric capacity C1, MOS pipe Q1, Q2, Q3. The utility model discloses an analog circuit for circuit converts a PWM signal into PWM signal and two kinds of control signal of different types of high level, also is the low level signal that the output lasts when the low level signal that the PWM signal is lasting simultaneously.
Description
Technical Field
The utility model relates to a power supply circuit, concretely relates to circuit that high level signal that will last is converted into to PWM signal that lasts.
Background
At present, the switch of the MOS tube is controlled by the PWM signal, the technology is widely applied to the dimming field of the LED lamp, and the MOS tube is driven by the PWM signal of small current to switch so as to adjust the peak current output by the power supply to realize the dimming effect of the LED lamp.
When the technology is applied under the condition that the power supply needs to provide additional auxiliary power supply, the auxiliary power supply does not need to regulate the output peak current, and the switching is required along with the on-off of the lamp, and the work cannot be finished only by a single PWM signal.
Disclosure of Invention
The present invention provides a circuit for converting a continuous PWM signal into a continuous high level signal, including resistors R1, R2, R3, R4, R5, R6, capacitor C1, MOS transistors Q1, Q2, Q3; the grid of the MOS transistor Q1 is connected with a resistor R1, the other end of the resistor R1 is connected with a PWM signal, the drain of the MOS transistor Q1 is connected with a resistor R2, the other end of the resistor R2 is respectively connected with a power supply VCC, a resistor R3 and a resistor R6, the source of the MOS transistor Q1 is respectively connected with the grids of a capacitor C1, a resistor R4 and an MOS transistor Q2, and the source of the MOS transistor Q2 is respectively connected with a resistor R4, a resistor R1 and a resistor R5 and connected with the ground in parallel; the source of the MOS transistor Q2 is connected with the resistor R5, the gate of the MOS transistor Q3 and the resistor R3 respectively, and the source of the MOS transistor Q2 is connected with the resistor R6, 10V or 0V terminal respectively.
Further, the resistance of the resistor R1 is 2K, the resistance of the resistor R2 is 1.8K, the resistance of the resistor R3 is 15K, the resistance of the resistor R4 is 100K, the resistance of the resistor R5 is 100K, and the resistance of the resistor R6 is 1K.
Further, the capacitor C1 is a 16V, 2.2uF capacitor.
Furthermore, the MOS tubes Q1, Q2 and Q3 are all N-type MOS tubes.
Furthermore, the MOS tubes Q1, Q2 and Q3 are all 2A and 60V MOS tubes.
The utility model has the advantages that:
the utility model discloses an analog circuit for circuit converts a PWM signal into PWM signal and two kinds of control signal of different types of high level, also is the low level signal that the output lasts when the low level signal that the PWM signal is lasting simultaneously.
In addition to the above-described objects, features and advantages, the present invention has other objects, features and advantages. The present invention will be described in further detail with reference to the drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification.
Fig. 1 is a circuit schematic diagram of an embodiment of the present invention;
fig. 2 is a schematic diagram of a signal waveform of a circuit according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
Referring to fig. 1, as shown in fig. 1, a circuit for converting a continuous PWM signal into a continuous high level signal includes resistors R1, R2, R3, R4, R5, R6, a capacitor C1, MOS transistors Q1, Q2, and Q3; the grid of the MOS transistor Q1 is connected with a resistor R1, the other end of the resistor R1 is connected with a PWM signal, the drain of the MOS transistor Q1 is connected with a resistor R2, the other end of the resistor R2 is respectively connected with a power supply VCC, a resistor R3 and a resistor R6, the source of the MOS transistor Q1 is respectively connected with the grids of a capacitor C1, a resistor R4 and an MOS transistor Q2, and the source of the MOS transistor Q2 is respectively connected with a resistor R4, a resistor R1 and a resistor R5 and connected with the ground in parallel; the source of the MOS transistor Q2 is connected with the resistor R5, the gate of the MOS transistor Q3 and the resistor R3 respectively, and the source of the MOS transistor Q2 is connected with the resistor R6, 10V or 0V terminal respectively.
The resistance value of the resistor R1 is 2K, the resistance value of the resistor R2 is 1.8K, the resistance value of the resistor R3 is 15K, the resistance value of the resistor R4 is 100K, the resistance value of the resistor R5 is 100K, and the resistance value of the resistor R6 is 1K.
The capacitance C1 is a capacitance of 16V and 2.2 uF.
The MOS tubes Q1, Q2 and Q3 are all N-type MOS tubes.
The MOS tubes Q1, Q2 and Q3 are all 2A and 60V MOS tubes.
The utility model discloses the theory of operation of circuit:
the PWM signal drives a MOS tube Q1 after being limited by a resistor R1, so that the MOS tube Q1 works in a switching state between on and off, the current is limited by the resistor R2 when the MOS tube Q1 is switched on, then the capacitor C1 is charged, and when the voltage in the capacitor C1 is larger than or equal to 2VDC, the MOS tube Q2 starts to be switched on. The transistor Q2 turns on to pull down the driving voltage to the transistor Q3 through the resistor R3, so that the transistor Q3 operates in the off state, and the drain voltage of the transistor Q3 is at a high level.
Referring to fig. 2, as shown in fig. 2, when the PWM signal is a continuous low level signal, the MOS transistor Q1 operates in an off state due to no driving voltage, the capacitor C1 also runs out of electric energy due to no continuous power supply, the MOS transistor Q2 also operates in an off state due to no driving voltage, and the MOS transistor Q2 pulls down the driving voltage provided to the MOS transistor Q3 through the resistor R3, so that the MOS transistor Q3 operates in an on state, and at this time, the drain voltage of the MOS transistor Q3 is a low level voltage.
Because the charging and discharging frequency of the voltage at the two ends of the capacitor C1 is much lower than the switching frequency of the PWM signal, the capacitor C1 is charged when the PWM signal is switched to a high level, the capacitor C1 starts to discharge when the PWM signal is switched to a low level, and when the electric energy of the capacitor C1 is not completely discharged, the voltage at the two ends of the capacitor C1 is switched to a high level due to the PWM signal, so that the voltage at the two ends of the capacitor C1 is maintained to be more than or equal to 2VDC, and the driving voltage required by the conduction of the MOS tube Q.
The role of the MOS transistors Q2 and Q3 in this circuit is to amplify the weak high level signal into a strong high level signal for driving the MOS transistors with large current.
The utility model discloses an analog circuit for circuit converts a PWM signal into PWM signal and two kinds of control signal of different types of high level, also is the low level signal that the output lasts when the low level signal that the PWM signal is lasting simultaneously.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (5)
1. A circuit for converting a continuous PWM signal into a continuous high-level signal is characterized by comprising resistors R1, R2, R3, R4, R5, R6, a capacitor C1, MOS transistors Q1, Q2 and Q3; the grid of the MOS transistor Q1 is connected with a resistor R1, the other end of the resistor R1 is connected with a PWM signal, the drain of the MOS transistor Q1 is connected with a resistor R2, the other end of the resistor R2 is respectively connected with a power supply VCC, a resistor R3 and a resistor R6, the source of the MOS transistor Q1 is respectively connected with the grids of a capacitor C1, a resistor R4 and an MOS transistor Q2, and the source of the MOS transistor Q2 is respectively connected with a resistor R4, a resistor R1 and a resistor R5 and connected with the ground in parallel; the source of the MOS transistor Q2 is connected with the resistor R5, the gate of the MOS transistor Q3 and the resistor R3 respectively, and the source of the MOS transistor Q2 is connected with the resistor R6, 10V or 0V terminal respectively.
2. The circuit of claim 1, wherein the resistor R1 has a resistance of 2K, the resistor R2 has a resistance of 1.8K, the resistor R3 has a resistance of 15K, the resistor R4 has a resistance of 100K, the resistor R5 has a resistance of 100K, and the resistor R6 has a resistance of 1K.
3. The circuit for converting a continuous PWM signal to a continuous high signal according to claim 1, wherein the capacitor C1 is a 16V, 2.2uF capacitor.
4. The circuit for converting a continuous PWM signal into a continuous high signal according to claim 1, wherein said MOS transistors Q1, Q2, Q3 are all N-type MOS transistors.
5. The circuit for converting a continuous PWM signal into a continuous high-level signal according to any one of claims 1-4, wherein said MOS transistors Q1, Q2 and Q3 are all 2A, 60V MOS transistors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920772261.3U CN210112330U (en) | 2019-05-27 | 2019-05-27 | Circuit for converting continuous PWM signal into continuous high-level signal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920772261.3U CN210112330U (en) | 2019-05-27 | 2019-05-27 | Circuit for converting continuous PWM signal into continuous high-level signal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210112330U true CN210112330U (en) | 2020-02-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920772261.3U Active CN210112330U (en) | 2019-05-27 | 2019-05-27 | Circuit for converting continuous PWM signal into continuous high-level signal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210112330U (en) |
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2019
- 2019-05-27 CN CN201920772261.3U patent/CN210112330U/en active Active
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