CN214314676U - Quick response circuit for indicator lamp of charger - Google Patents
Quick response circuit for indicator lamp of charger Download PDFInfo
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- CN214314676U CN214314676U CN202120554507.7U CN202120554507U CN214314676U CN 214314676 U CN214314676 U CN 214314676U CN 202120554507 U CN202120554507 U CN 202120554507U CN 214314676 U CN214314676 U CN 214314676U
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Abstract
The utility model relates to an indicator light of charger shows the field, disclose an indicator light quick response circuit of charger, including MCU, half-wave rectifier circuit, control switch and diode luminescent circuit, state the diode luminescent circuit and include resistance R2 and emitting diode LED1, the input of half-wave rectifier circuit is connected with the AC input end electricity of charger, the output of half-wave rectifier circuit is connected with control switch's control end electricity, MCU's I O end is connected with diode luminescent circuit electricity, to diode luminescent circuit input drive signal, diode luminescent circuit's output is connected with control switch's input electricity, control switch's output ground connection, when using, the bright or dim of emitting diode LED1 is controlled by MCU's I O end output signal and half-wave rectifier circuit's output signal simultaneously, when MCU's I O end output high level signal, if the charger AC input is suddenly de-energized, the LED1 will immediately go off without delaying the response.
Description
Technical Field
The utility model relates to an indicator lamp of charger shows the field, concretely relates to indicator lamp quick response circuit of charger.
Background
At present, along with the road congestion aggravation, when going out in a short distance, more and more people select two-wheeled electric vehicles. The electric vehicle is driven by a battery, and a charger is needed to charge when the battery is not charged.
However, when the conventional charger is fully charged or the ac input terminal is unplugged in other states, due to the energy storage function of the internal capacitor of the charger, the VCC port of the MCU cannot be quickly lowered below the working voltage, the on/off of the ac input cannot be quickly recognized, and a delay response of the indicator lamp, that is, the indicator lamp is turned off after the ac input terminal is unplugged, may be caused, and the delay response may cause a false impression that the charger continues to operate after the ac input terminal is unplugged, especially when the charger adopts a chip with a lock function and is in a protection state, the delay time is longer, and may even reach more than 1 minute, which greatly affects the experience of the client.
SUMMERY OF THE UTILITY MODEL
In view of the not enough of background art, the utility model provides an pilot lamp quick response circuit of charger, the technical problem that solve is that the power indicator of charger is gone out for the lag after AC input pulls out at current charger.
For solving the technical problem, the utility model provides a following technical scheme: the utility model provides an pilot lamp quick response circuit of charger, including MCU, half-wave rectifier circuit, control switch and diode luminescent circuit, half-wave rectifier circuit's input is connected with the alternating current input end electricity of charger, half-wave rectifier circuit's output and control switch's control end electricity are connected, MCU's IO end is connected with the diode luminescent circuit electricity, to diode luminescent circuit input drive signal, diode luminescent circuit's output is connected with control switch's input electricity, control switch's output ground connection.
Optionally, in an embodiment, the half-wave rectification circuit includes a diode D1 and a resistor R1, an anode of the diode D1 is electrically connected to the ac input terminal of the charger, a cathode of the diode D1 is electrically connected to one end of the resistor R1, and the other end of the resistor R1 is electrically connected to the control terminal of the control switch.
Optionally, in a certain embodiment, the diode light emitting circuit includes a resistor R2 and a light emitting diode LED1, one end of the resistor R2 is electrically connected to an IO terminal of the MCU for receiving a driving signal sent by the MCU, the other end of the resistor R2 is electrically connected to an anode of the light emitting diode LED1, and a cathode of the light emitting diode LED1 is electrically connected to an input terminal of the control switch.
Preferably, the control switch is a photocoupler U1, the anode of a diode U1A of the photocoupler U1 is electrically connected with one end of a resistor R1, and the collector of a triode U1B of the photocoupler U1 is electrically connected with the cathode of a light emitting diode LED 1.
Optionally, in an embodiment, the control switch is a transistor, a base of the transistor is electrically connected to one end of the resistor R1, and a collector of the transistor is electrically connected to a cathode of the light emitting diode LED 1.
Optionally, in a certain embodiment, the control switch is a MOS transistor, a gate of the MOS transistor is electrically connected to one end of the resistor R1, and a drain of the MOS transistor is electrically connected to a cathode of the light emitting diode LED 1.
Use control switch to adopt photoelectric coupler U1 as the example, the utility model discloses a theory of operation as follows: alternating current voltage at an alternating current input end of the charger acts on a diode U1A end of a photoelectric coupler U1 after being rectified by a diode D1 and limited by a current limiting resistor R1, when L, N voltage is at an alternating current positive half shaft, voltage at two ends of a diode U1A end is positive, a triode U1B is conducted, an IO end of an MCU is connected with the ground of a secondary side through the current limiting resistor R2, a light emitting diode LED1 and the triode U1B of the photoelectric coupler U1, and the light emitting diode LED1 is bright; when L, N voltage is in the negative half shaft of alternating current, the voltage at two ends of the diode U1A end is 0, the triode U1B is cut off, the MCUDEIO end cannot be connected with the ground of the secondary side through the current-limiting resistor R2, the light-emitting diode LED1 and the triode U1B of the photoelectric coupler U1, and the light-emitting diode LED1 is turned off; because commercial power alternating current input is 50Hz, human eyes cannot easily perceive stroboflash, so that the human eyes can observe that the light-emitting diode is in a normally-on state, and can output high-level signals, low-level signals or square wave signals through the IO port of the MCU, so that the working state of the light-emitting diode LED1 can be controlled to be normally-on, normally-off or normally-on.
When the alternating current input is cut off, the voltage at the two ends of the diode U1A is 0, the triode U1B is cut off, the IO end of the MCU cannot be connected with the ground of the secondary side through the current limiting resistor R2, the light emitting diode LED1 and the triode U1B of the photoelectric coupler U1, and the light emitting diode LED1 goes out.
Compared with the prior art, the utility model beneficial effect who has is: the on-off of the light-emitting diode LED1 is controlled by the output signal of the IO end of the MCU and the output signal of the half-wave rectification circuit at the same time, when the IO end of the MCU outputs a high level signal, if the alternating current input of the charger is suddenly cut off, the light-emitting diode LED1 is immediately turned off, and the response cannot be delayed; in addition, when the charger is connected with an alternating current input, the IO end of the MCU can output a high level signal, a low level signal or a square wave signal with different frequencies, so that the LED1 can be turned on and off constantly or flash at different frequencies, which can indicate different working states.
Drawings
The utility model discloses there is following figure:
fig. 1 is a circuit diagram of the present invention.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic drawings and illustrate the basic structure of the present invention only in a schematic manner, and thus show only the components related to the present invention.
As shown in fig. 1, an indicator light quick response circuit of a charger comprises an MCU, a half-wave rectifier circuit 1, a control switch and a diode light emitting circuit 2, wherein an input end of the half-wave rectifier circuit 1 is electrically connected with an alternating current input end of the charger, an output end of the half-wave rectifier circuit 1 is electrically connected with a control end of the control switch, an IO end of the MCU is electrically connected with the diode light emitting circuit 2, a driving signal is input to the diode light emitting circuit 2, an output end of the diode light emitting circuit 2 is electrically connected with an input end of the control switch, and an output end of the control switch is grounded.
Specifically, in the present embodiment, the half-wave rectifier circuit 1 includes a diode D1 and a resistor R1, the anode of the diode D1 is electrically connected to the ac input terminal of the charger, the cathode of the diode D1 is electrically connected to one end of the resistor R1, and the other end of the resistor R1 is electrically connected to the control terminal of the control switch.
Specifically, in this embodiment, the diode light emitting circuit 2 includes a resistor R2 and a light emitting diode LED1, one end of the resistor R2 is electrically connected to an IO terminal of the MCU for receiving a driving signal sent by the MCU, the other end of the resistor R2 is electrically connected to an anode of the light emitting diode LED1, and a cathode of the light emitting diode LED1 is electrically connected to an input terminal of the control switch.
Preferably, in this embodiment, the control switch is a photocoupler U1, the anode of the diode U1A of the photocoupler U1 is electrically connected to one end of the resistor R1, and the collector of the triode U1B of the photocoupler U1 is electrically connected to the cathode of the light emitting diode LED 1.
In addition, the photoelectric coupler U1 can be used for optical coupling isolation, so that the interference of alternating current on the normal operation of the MCU is prevented.
Optionally, in an embodiment, the control switch is a transistor, a base of the transistor is electrically connected to one end of the resistor R1, and a collector of the transistor is electrically connected to a cathode of the light emitting diode LED 1.
Optionally, in a certain embodiment, the control switch is a MOS transistor, a gate of the MOS transistor is electrically connected to one end of the resistor R1, and a drain of the MOS transistor is electrically connected to a cathode of the light emitting diode LED 1.
Use control switch to adopt photoelectric coupler U1 as the example, the utility model discloses a theory of operation as follows: alternating current voltage at an alternating current input end of the charger acts on a diode U1A end of a photoelectric coupler U1 after being rectified by a diode D1 and limited by a current limiting resistor R1, when L, N voltage is at an alternating current positive half shaft, voltage at two ends of a diode U1A end is positive, a triode U1B is conducted, an IO end of an MCU is connected with the ground of a secondary side through the current limiting resistor R2, a light emitting diode LED1 and the triode U1B of the photoelectric coupler U1, and the light emitting diode LED1 is bright; when L, N voltage is in an alternating current negative half shaft, the voltage at two ends of a diode U1A end is 0, a triode U1B is cut off, an MCUDE IO end cannot be connected with the ground of a secondary side through a current-limiting resistor R2, a light-emitting diode LED1 and a triode U1B of a photoelectric coupler U1, and the light-emitting diode LED1 is turned off; because commercial power alternating current input is 50Hz, human eyes cannot easily perceive stroboflash, so that the human eyes can observe that the light-emitting diode is in a normally-on state, and can output high-level signals, low-level signals or square wave signals through the IO port of the MCU, so that the working state of the light-emitting diode LED1 can be controlled to be normally-on, normally-off or normally-on.
When the alternating current input is cut off, the voltage at the two ends of the diode U1A is 0, the triode U1B is cut off, the IO end of the MCU cannot be connected with the ground of the secondary side through the current limiting resistor R2, the light emitting diode LED1 and the triode U1B of the photoelectric coupler U1, and the light emitting diode LED1 goes out.
To sum up, the utility model discloses when in actual use the bright going out of emitting diode LED1 is controlled by the output signal of MCU's IO end and the output signal of half-wave rectifier circuit simultaneously, when MCU's IO end output high level signal, if the alternating current input of charger cuts off the power supply suddenly, emitting diode LED1 can extinguish immediately, can not delay the response; in addition, when the charger is connected with an alternating current input, the IO end of the MCU can output a high level signal, a low level signal or a square wave signal with different frequencies, so that the LED1 can be turned on and off constantly or flash at different frequencies, which can indicate different working states.
In light of the above, the present invention is not limited to the above embodiments, and various changes and modifications can be made by the worker without departing from the scope of the present invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (6)
1. The utility model provides an pilot lamp quick response circuit of charger which characterized in that: the half-wave rectifier circuit comprises an MCU (microprogrammed control unit), a half-wave rectifier circuit, a control switch and a diode light-emitting circuit, wherein the input end of the half-wave rectifier circuit is electrically connected with the alternating current input end of a charger, the output end of the half-wave rectifier circuit is electrically connected with the control end of the control switch, the IO end of the MCU is electrically connected with the diode light-emitting circuit, a driving signal is input into the diode light-emitting circuit, the output end of the diode light-emitting circuit is electrically connected with the input end of the control switch, and the output end of the control switch is grounded.
2. The fast response circuit of claim 1, wherein: the half-wave rectifying circuit comprises a diode D1 and a resistor R1, the anode of the diode D1 is electrically connected with the alternating current input end of the charger, the cathode of the diode D1 is electrically connected with one end of the resistor R1, and the other end of the resistor R1 is electrically connected with the control end of the control switch.
3. The fast response circuit of claim 2, wherein: the diode light-emitting circuit comprises a resistor R2 and a light-emitting diode LED1, one end of the resistor R2 is electrically connected with an IO terminal of the MCU and used for receiving a driving signal sent by the MCU, the other end of the resistor R2 is electrically connected with the anode of the light-emitting diode LED1, and the cathode of the light-emitting diode LED1 is electrically connected with the input end of the control switch.
4. The fast response circuit of claim 3, wherein: the control switch is a photoelectric coupler U1, the anode of a diode U1A of the photoelectric coupler U1 is electrically connected with one end of the resistor R1, and the collector of a triode U1B of the photoelectric coupler U1 is electrically connected with the cathode of the light-emitting diode LED 1.
5. The fast response circuit of claim 3, wherein: the control switch is a triode, the base of the triode is electrically connected with one end of the resistor R1, and the collector of the triode is electrically connected with the cathode of the light-emitting diode LED 1.
6. The fast response circuit of claim 3, wherein: the control switch is an MOS tube, the grid electrode of the MOS tube is electrically connected with one end of the resistor R1, and the drain electrode of the MOS tube is electrically connected with the cathode of the light-emitting diode LED 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120554507.7U CN214314676U (en) | 2021-03-17 | 2021-03-17 | Quick response circuit for indicator lamp of charger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120554507.7U CN214314676U (en) | 2021-03-17 | 2021-03-17 | Quick response circuit for indicator lamp of charger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214314676U true CN214314676U (en) | 2021-09-28 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120554507.7U Active CN214314676U (en) | 2021-03-17 | 2021-03-17 | Quick response circuit for indicator lamp of charger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214314676U (en) |
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2021
- 2021-03-17 CN CN202120554507.7U patent/CN214314676U/en active Active
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