CN211352519U - Wide-voltage, constant-output-power and wide-output-voltage linear circuit and LED lamp - Google Patents
Wide-voltage, constant-output-power and wide-output-voltage linear circuit and LED lamp Download PDFInfo
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- CN211352519U CN211352519U CN201922214304.9U CN201922214304U CN211352519U CN 211352519 U CN211352519 U CN 211352519U CN 201922214304 U CN201922214304 U CN 201922214304U CN 211352519 U CN211352519 U CN 211352519U
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Abstract
The utility model provides a wide voltage, constant output power and wide output voltage linear circuit, MCU voltage detection circuit detects the voltage of input divider resistance and judges the size of input voltage; the MCU outputs a PWM1 signal with a corresponding duty ratio according to the magnitude of the input voltage to drive the charging switch to be switched on, and the electrolytic capacitor enters a charging state; the MCU voltage detection circuit also detects the voltage of the output divider resistor and judges the magnitude of the output voltage; the MCU outputs a PWM2 signal with a corresponding duty ratio according to the output voltage to drive the discharge switch to be conducted, and the electrolytic capacitor enters a discharge state. The wide-voltage, constant-output-power and wide-output-voltage linear circuit solves the problem that the traditional linear scheme cannot realize wide voltage input and limited output voltage range. The utility model also provides a LED lamp, its drive circuit is as above wide voltage, constant output and wide output voltage linear circuit.
Description
Technical Field
The utility model relates to a lighting device especially relates to lighting device's drive circuit.
Background
Conventional linear schemes are not limited by the wide voltage input and output voltage ranges. The LED light source selection is more limited, the finished product market is limited by voltage, and a product can not adapt to the voltage standards of different countries all over the world, so that a wide-voltage unified scheme can not be realized.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the main technical problem that a wide voltage, constant output and wide output voltage linear circuit is provided, the unable wide voltage input of traditional linear scheme and the limited problem of output voltage scope have been solved.
In order to solve the technical problem, the utility model provides a wide voltage, constant output power and wide output voltage linear circuit, which comprises an MCU voltage detection circuit, an input divider resistor, an output divider resistor, an electrolytic capacitor, a charging switch and a discharging switch;
the MCU voltage detection circuit detects the voltage of the input divider resistor and judges the magnitude of the input voltage; the MCU outputs a PWM1 signal with a corresponding duty ratio according to the magnitude of the input voltage to drive the charging switch to be switched on, and the electrolytic capacitor enters a charging state; the MCU voltage detection circuit also detects the voltage of the output divider resistor and judges the magnitude of the output voltage; the MCU outputs a PWM2 signal with a corresponding duty ratio according to the output voltage to drive the discharge switch to be switched on, and the electrolytic capacitor enters a discharge state.
In a preferred embodiment: the input voltage-dividing resistor comprises resistors R1, R2 and R3 which are connected between the positive output end and the negative output end of the rectifier bridge in series; the MCU voltage detection circuit detects the voltage of the resistor R3.
In a preferred embodiment: the output voltage-dividing resistor comprises resistors R4, R5 and R6 which are connected between the positive output end and the negative output end of the rectifier bridge in series; the MCU voltage detection circuit detects the voltage of the resistor R6.
In a preferred embodiment: the charging switch is an MOS transistor Q1, the grid electrode of the charging switch is connected with the PWM signal output end of the MCU, the source electrode of the charging switch is connected with the negative electrode output end of the rectifier bridge, the drain electrode of the charging switch is connected to the negative electrode of the electrolytic capacitor through a diode D1, and the positive electrode of the electrolytic capacitor is connected with the positive electrode output end of the rectifier bridge.
In a preferred embodiment: the charging switch is an MOS transistor Q1, the grid electrode of the charging switch is connected with the PWM signal output end of the MCU, the source electrode of the charging switch is connected with the negative electrode output end of the rectifier bridge, the drain electrode of the charging switch is connected with the negative electrode of the electrolytic capacitor, and the positive electrode of the electrolytic capacitor is connected with the positive electrode output end of the rectifier bridge.
In a preferred embodiment: the discharging switch is an MOS transistor Q2, the grid electrode of the discharging switch is connected with the PWM signal output end of the MCU, the source electrode of the discharging switch is connected with the negative electrode output end of the rectifier bridge, the drain electrode of the discharging switch is connected to the negative electrode of the LED through the linear IC, and the positive electrode of the LED is connected to the positive electrode output end of the rectifier bridge.
In a preferred embodiment: the input voltage is 100V-264V.
In a preferred embodiment: the input voltage is 10V-90V.
The utility model also provides a LED lamp, its drive circuit is as above wide voltage, constant output power and wide output voltage linear circuit.
Compared with the prior art, the technical scheme of the utility model possess following beneficial effect:
the utility model provides a wide input voltage, constant output and wide output voltage's linear drive circuit utilizes a MCU, detects input/output voltage through MCU, and two way MOS pipes of rethread PWM drive realize that electrolytic capacitor is controlled to be charged and discharge. The problem that a traditional linear scheme cannot be wide in voltage input and limited in output voltage range is solved. The LED down lamp is suitable for decoration of LED lighting lamps, flat lamps, ceiling lamps, down lamps, LED lighting lamps and the like, and can be completely used in any occasions, such as art museums, museums and the like. The LED lamp can be used for civil illumination, commercial illumination, industrial illumination and the like. The product is suitable for global universal commercial power (100V-264V).
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a linear circuit diagram of wide voltage, constant output power and wide output voltage in the preferred embodiment 1 of the present invention;
fig. 2 is a linear circuit diagram of wide voltage, constant output power and wide output voltage in preferred embodiment 2 of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Example 1
Referring to fig. 1, the present embodiment provides a wide voltage, constant output power and wide output voltage linear circuit, including an MCU voltage detection circuit, an input voltage dividing resistor, an output voltage dividing resistor, an electrolytic capacitor, a charging switch and a discharging switch;
the MCU voltage detection circuit detects the voltage of the input divider resistor and judges the magnitude of the input voltage; the MCU outputs a PWM1 signal with a corresponding duty ratio according to the magnitude of the input voltage to drive the charging switch to be switched on, and the electrolytic capacitor enters a charging state; the MCU voltage detection circuit also detects the voltage of the output divider resistor and judges the magnitude of the output voltage; the MCU outputs a PWM2 signal with a corresponding duty ratio according to the output voltage to drive the discharge switch to be switched on, and the electrolytic capacitor enters a discharge state.
Therefore, the utility model discloses can be according to the difference of input voltage, the duty cycle of adjustment PWM1 signal to realize the purpose of the different national voltage of adaptation (100V-264V). And furthermore, the difference of output voltages (10V-90V) is realized by adjusting the duty ratio of the PWM2 signal, so that the LED lamp is suitable for decoration of LED lighting lamps, flat lamps, ceiling lamps, down lamps, LED lighting lamps and the like, and can be completely used in any occasions, such as art museums, museums and the like. The LED lamp can be used for civil illumination, commercial illumination, industrial illumination and the like.
Specifically, the input voltage-dividing resistor of the present embodiment includes resistors R1, R2, R3 connected in series between the positive output terminal and the negative output terminal of the rectifier bridge; the MCU voltage detection circuit detects the voltage of the resistor R3. The output voltage-dividing resistor comprises resistors R4, R5 and R6 which are connected between the positive output end and the negative output end of the rectifier bridge in series; the MCU voltage detection circuit detects the voltage of the resistor R6.
The charging switch is an MOS transistor Q1, the grid electrode of the charging switch is connected with the PWM signal output end of the MCU, the source electrode of the charging switch is connected with the negative electrode output end of the rectifier bridge, the drain electrode of the charging switch is connected to the negative electrode of the electrolytic capacitor through a diode D1, and the positive electrode of the electrolytic capacitor is connected with the positive electrode output end of the rectifier bridge. Therefore, when the Q1 is conducted, two ends of the electrolytic capacitor are connected to the positive electrode output end and the negative electrode output end of the rectifier bridge, and charging of the electrolytic capacitor is achieved.
The discharging switch is an MOS transistor Q2, the grid electrode of the discharging switch is connected with the PWM signal output end of the MCU, the source electrode of the discharging switch is connected with the negative electrode output end of the rectifier bridge, the drain electrode of the discharging switch is connected to the negative electrode of the LED through the linear IC, and the positive electrode of the LED is connected to the positive electrode output end of the rectifier bridge. Thus, when the Q2 is conducted, the two ends of the electrolytic capacitor are connected to the two ends of the LED, and the discharge of the electrolytic capacitor is realized.
The utility model provides a LED lamp, its drive circuit is as above wide voltage, constant output power and wide output voltage linear circuit.
Example 2
Referring to fig. 2, the present embodiment is different from embodiment 1 in that diodes D1 and D2 are omitted, the rest is the same as embodiment 1, and the operating principle of the circuit is also the same as embodiment 1, and is not described again.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. Wide voltage, constant output power and wide output voltage linear circuit, its characterized in that: the device comprises an MCU voltage detection circuit, an input divider resistor, an output divider resistor, an electrolytic capacitor, a charging switch and a discharging switch;
the MCU voltage detection circuit detects the voltage of the input divider resistor and judges the magnitude of the input voltage; the MCU outputs a PWM1 signal with a corresponding duty ratio according to the magnitude of the input voltage to drive the charging switch to be switched on, and the electrolytic capacitor enters a charging state; the MCU voltage detection circuit also detects the voltage of the output divider resistor and judges the magnitude of the output voltage; the MCU outputs a PWM2 signal with a corresponding duty ratio according to the output voltage to drive the discharge switch to be switched on, and the electrolytic capacitor enters a discharge state.
2. The wide voltage, constant output power, and wide output voltage linear circuit of claim 1, wherein: the input voltage-dividing resistor comprises resistors R1, R2 and R3 which are connected between the positive output end and the negative output end of the rectifier bridge in series; the MCU voltage detection circuit detects the voltage of the resistor R3.
3. The wide voltage, constant output power, and wide output voltage linear circuit of claim 1, wherein: the output voltage-dividing resistor comprises resistors R4, R5 and R6 which are connected between the positive output end and the negative output end of the rectifier bridge in series; the MCU voltage detection circuit detects the voltage of the resistor R6.
4. The wide voltage, constant output power, and wide output voltage linear circuit of claim 1, wherein: the charging switch is an MOS transistor Q1, the grid electrode of the charging switch is connected with the PWM signal output end of the MCU, the source electrode of the charging switch is connected with the negative electrode output end of the rectifier bridge, the drain electrode of the charging switch is connected to the negative electrode of the electrolytic capacitor through a diode D1, and the positive electrode of the electrolytic capacitor is connected with the positive electrode output end of the rectifier bridge.
5. The wide voltage, constant output power, and wide output voltage linear circuit of claim 1, wherein: the charging switch is an MOS transistor Q1, the grid electrode of the charging switch is connected with the PWM signal output end of the MCU, the source electrode of the charging switch is connected with the negative electrode output end of the rectifier bridge, the drain electrode of the charging switch is connected with the negative electrode of the electrolytic capacitor, and the positive electrode of the electrolytic capacitor is connected with the positive electrode output end of the rectifier bridge.
6. The wide voltage, constant output power, and wide output voltage linear circuit of claim 1, wherein: the discharging switch is an MOS transistor Q2, the grid electrode of the discharging switch is connected with the PWM signal output end of the MCU, the source electrode of the discharging switch is connected with the negative electrode output end of the rectifier bridge, the drain electrode of the discharging switch is connected to the negative electrode of the LED through the linear IC, and the positive electrode of the LED is connected to the positive electrode output end of the rectifier bridge.
7. The wide voltage, constant output power, and wide output voltage linear circuit of claim 1, wherein: the input voltage is 100V-264V.
8. The wide voltage, constant output power, and wide output voltage linear circuit of claim 1, wherein: the input voltage is 10V-90V.
An LED lamp, characterized in that the driving circuit is a wide voltage, constant output power and wide output voltage linear circuit as claimed in any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922214304.9U CN211352519U (en) | 2019-12-11 | 2019-12-11 | Wide-voltage, constant-output-power and wide-output-voltage linear circuit and LED lamp |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922214304.9U CN211352519U (en) | 2019-12-11 | 2019-12-11 | Wide-voltage, constant-output-power and wide-output-voltage linear circuit and LED lamp |
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| CN211352519U true CN211352519U (en) | 2020-08-25 |
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| CN201922214304.9U Active CN211352519U (en) | 2019-12-11 | 2019-12-11 | Wide-voltage, constant-output-power and wide-output-voltage linear circuit and LED lamp |
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| CN (1) | CN211352519U (en) |
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