CN203243559U - Indication lamp circuit and adapter - Google Patents
Indication lamp circuit and adapter Download PDFInfo
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- CN203243559U CN203243559U CN2013202056430U CN201320205643U CN203243559U CN 203243559 U CN203243559 U CN 203243559U CN 2013202056430 U CN2013202056430 U CN 2013202056430U CN 201320205643 U CN201320205643 U CN 201320205643U CN 203243559 U CN203243559 U CN 203243559U
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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
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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Abstract
The utility model discloses an indication lamp circuit and an adapter; the indication lamp circuit is used for controlling and indicating an indication lamp of the adapter to light up or to extinguish, is respectively connected with an AC power and a switch power of the adapter, and comprises the indication lamp, a photo-electric control module, a charge-and-discharge control module and a switch control module; when the adapter is powered up, the photo-electric control module gets power from the AC power and controls the switch control module to be connected so as to drive the indication lamp to light up; when the adapter is powered off, the photo-electric control module does not work, the charge-and-discharge control module is charged by the switch power and discharges to control the switch control module to disconnect, so the indication lamp is controlled to extinguish; and a charging time of the charge-and-discharge control module can be adjusted to control a time period between an adapter power off time and an indication lamp extinguishing time, thereby realizing fast extinguishment of the indication lamp after the adapter is powered off, and a misjudgement problem caused by delayed extinguishment of the indication lamp is solved.
Description
Technical Field
The utility model relates to a power technical field especially relates to an indicator lamp circuit and adapter.
Background
Electronic equipment and electrical appliances mostly use alternating current as power supplies, wherein, for the requirement of universality, adapters are selected as power supplies for many electronic equipment and electrical appliances. The current adapter requires that the no-load power consumption is as low as possible, the no-load power consumption of a common adapter can be below 0.5W, and the no-load power consumption of a good adapter can be below 100mW, however, a new problem is caused, because the adapter is provided with the LED lamp for indicating the power output, when the adapter is powered off, because the filter capacitor of the power supply inside the adapter stores energy, the no-load power consumption of the switch power supply is very low, the indicator lamp can be turned off for a long time (generally more than 30 seconds, and some even more than 2 minutes), the user feedback can cause misjudgment, and the adapter is mistakenly considered not to be powered off.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an indicator lamp circuit and adapter, aim at realizing that the adapter outage back indicator lamp extinguishes fast, avoid extinguishing because of the delay of indicator lamp and lead to the misjudgement.
In order to achieve the above object, the present invention provides an indicator light circuit, which is used for controlling and indicating the indicator light of an adapter to emit light or to extinguish, and is respectively connected to an ac power supply and a switching power supply of the adapter, including the indicator light, and is characterized in that the indicator light circuit further includes a switching control module for controlling the indicator light to emit light or to extinguish, a photoelectric control module for controlling the indicator light to emit light through the switching control module when the ac power supply supplies power, and a charging/discharging control module for controlling the indicator light to extinguish and to control the extinguishing time of the indicator light through the switching control module when the ac power supply does not supply power; wherein,
the input end of the photoelectric control module is connected with the alternating current power supply, and the output end of the photoelectric control module is connected with the control end of the switch control module; the input end of the charge and discharge control module is connected with the output end of the switching power supply, and the output end of the charge and discharge control module is connected with the control end of the switching control module; the input end of the switch control module is connected with the output end of the switch power supply, and the output end of the switch control module is connected with the indicator lamp.
Preferably, the output end of the photoelectric control module is connected with the output end of the switching power supply through the charge-discharge control module, and the control end of the photoelectric control module is connected with the input end of the switching power supply; the input end of the switching power supply comprises a positive input end and a negative input end, and the output end of the switching power supply comprises a positive output end and a negative output end.
Preferably, the optoelectronic control module comprises an optoelectronic coupler, a first diode, a second diode and a first resistor, wherein the optoelectronic coupler comprises a primary side light emitting diode and a secondary side triode; the anode of the first diode is connected with the first input end of the alternating current power supply, and the cathode of the first diode is connected with the anode of the primary side light-emitting diode through the first resistor; the anode of the second diode is connected with the second input end of the alternating current power supply, and the cathode of the second diode is connected with the anode of the primary side light-emitting diode through the first resistor; the cathode of the primary side light emitting diode is used as the control end of the photoelectric control module and is connected with the negative input end of the switching power supply, the collector of the secondary side triode is used as the output end of the photoelectric control module and is connected with the switching control module, and the emitter of the secondary side triode is connected with the negative output end of the switching power supply.
Preferably, the charge and discharge control module comprises a capacitor and a second resistor; one end of the capacitor is connected with the positive output end of the switching power supply through the second resistor, and the other end of the capacitor is connected with the negative output end of the switching power supply; and the common end of the second resistor and the capacitor is used as the output end of the charge and discharge control module and is connected with the control end of the switch control module.
Preferably, the switch control module includes a first switching element and a second switching element; the first switch element is connected with a collector of a secondary triode of the photoelectric coupler and respectively connected with the switching power supply, the charge and discharge control module and the second switch element, and the second switch element is connected with the switching power supply and the indicator light.
Preferably, the first switching element is a first triode, and the second switching element is a second triode; the base electrode of the first triode is connected with the common end of the second resistor and the capacitor and is connected with the collector electrode of the secondary triode of the photoelectric coupler, the collector electrode of the first triode is connected with the positive output end of the switching power supply and is connected with the base electrode of the second triode, and the emitter electrode of the first triode is connected with the negative output end of the switching power supply; and the collector of the second triode is connected with the positive output end of the switching power supply, and the emitter of the second triode is connected with the indicator light.
Preferably, the switch control module further comprises a third resistor and a fourth resistor, and the indicator light comprises a light emitting diode; one end of the third resistor is used as the input end of the switch control module and is connected with the positive output end of the switch power supply, and the other end of the third resistor is respectively connected with the collector electrode of the first triode and the base electrode of the second triode; the fourth resistor is connected between the emitting electrode of the second triode and the anode of the light-emitting diode, and the cathode of the light-emitting diode is connected with the negative output end of the switching power supply.
Preferably, the first switching element is a first MOS transistor, and the second switching element is a second MOS transistor; the grid electrode of the first MOS tube is connected with the common end of the second resistor and the capacitor and is connected with the collector electrode of a secondary triode of the photoelectric coupler, the drain electrode of the first MOS tube is connected with the positive output end of the switching power supply and is connected with the grid electrode of the second MOS tube, and the source electrode of the first MOS tube is connected with the negative output end of the switching power supply; the drain electrode of the second MOS tube is connected with the positive output end of the switching power supply, and the source electrode of the second MOS tube is connected with the indicator lamp.
Preferably, the switch control module further comprises a third resistor and a fourth resistor, and the indicator light comprises a light emitting diode; one end of the third resistor is used as the input end of the switch control module and is connected with the positive output end of the switch power supply, and the other end of the third resistor is respectively connected with the drain electrode of the first MOS tube and the grid electrode of the second MOS tube; the fourth resistor is connected between the source electrode of the second MOS tube and the anode of the light-emitting diode, and the cathode of the light-emitting diode is connected with the negative output end of the switching power supply.
The utility model also provides an adapter, which comprises an alternating current power supply, a rectification filter circuit, a switch power supply and an indicator light circuit, wherein the indicator light circuit is respectively connected with the alternating current power supply and the switch power supply, and the rectification filter circuit is connected between the alternating current power supply and the switch power supply; the indicating lamp circuit is used for controlling and indicating the light emitting or extinguishing of an indicating lamp of the adapter, the indicating lamp circuit comprises the indicating lamp, the indicating lamp circuit also comprises a switch control module used for controlling the light emitting or extinguishing of the indicating lamp, a photoelectric control module used for controlling the light emitting of the indicating lamp through the switch control module when the alternating current power supply supplies power, and a charge and discharge control module used for controlling the light extinguishing of the indicating lamp through the switch control module and controlling the extinguishing time of the indicating lamp when the alternating current power supply does not supply power; wherein,
the input end of the photoelectric control module is connected with the alternating current power supply, and the output end of the photoelectric control module is connected with the control end of the switch control module; the input end of the charge and discharge control module is connected with the switching power supply, and the output end of the charge and discharge control module is connected with the control end of the switching control module; the input end of the switch control module is connected with the switch power supply, and the output end of the switch control module is connected with the indicator light.
The utility model provides an indicator light circuit, when alternating current power supply supplies power, namely the adapter circular telegram, photoelectric control module gets the electricity from alternating current power supply to control switch control module switches on, switch control module drive pilot lamp is luminous; when the alternating current power supply does not supply power, namely the adapter cuts off the input of the outage alternating current, the photoelectric control module does not work, the charge and discharge control module gets the electricity from the switching power supply to charge, the electric energy is stored, when the stored electric energy is enough to control the disconnection of the switching control module, the switching control module is controlled to be disconnected, the switching control module controls the indicator lamp to be extinguished, furthermore, the extinguishing time of the indicator lamp can be controlled by adjusting the charging time of the charge and discharge control module, namely, the time from the power-off of the adapter to the extinguishing of the indicator lamp can be controlled, therefore, the time from the power-off of the adapter to the extinguishing of the indicator lamp can be shortened by adjusting the charging time, so that the indicator lamp can be extinguished. Compared with the prior art, the utility model discloses the pilot lamp circuit shortens the extinction time of pilot lamp through adjusting under the condition that does not increase the adapter consumption, has reached the purpose that the pilot lamp extinguishes fast after the adapter outage, has solved the problem that leads to the misjudgement because of the delay of pilot lamp extinguishes.
Drawings
FIG. 1 is a schematic block diagram of a preferred embodiment of the indicator light circuit of the present invention;
fig. 2 is a schematic circuit diagram of an embodiment of the indicator light circuit of the present invention;
fig. 3 is a schematic circuit diagram of another embodiment of the indicator light circuit of the present invention.
The objects, features and advantages of the present invention will be realized by the embodiments and will be further described with reference to the accompanying drawings.
Detailed Description
The technical solution of the present invention is further explained below with reference to the drawings and the specific embodiments of the specification. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The utility model provides an indicator lamp circuit.
Referring to fig. 1, fig. 1 is a schematic block diagram of a preferred embodiment of an indicator light circuit 400 according to the present invention.
In the embodiment of the present invention, the indicator light circuit 400 is used for controlling and indicating the indicator light 410 of the adapter to emit light or extinguish, and is respectively connected to the ac power supply 100 and the switching power supply 300 of the adapter, and the indicator light circuit 400 includes the indicator light 410, the photoelectric control module 420, the charging and discharging control module 430, and the switching control module 440; the switch control module 440 is used for controlling the indicator lamp 410 to emit light or extinguish, the photoelectric control module 420 is used for controlling the indicator lamp 410 to emit light through the switch control module 440 when the alternating current power supply 100 supplies power, and the charge and discharge control module 430 is used for controlling the indicator lamp 410 to extinguish through the switch control module 440 and controlling the extinguishing time of the indicator lamp 410 when the alternating current power supply 100 does not supply power.
The input end of the photoelectric control module 420 is connected with the alternating current power supply 100, and the output end of the photoelectric control module 420 is connected with the control end of the switch control module 440; the input end of the charge and discharge control module 430 is connected with the output end of the switching power supply 300, and the output end of the charge and discharge control module 430 is connected with the control end of the switching control module 440; the input end of the switch control module 440 is connected to the output end of the switching power supply 300, and the output end of the switch control module 440 is connected to the indicator lamp 410.
When the ac power supply 100 supplies power and the instant adapter is powered on, the optoelectronic control module 420 takes power from the ac power supply 100 and controls the switch control module 440 to be turned on, and the switch control module 440 drives the indicator lamp 410 to emit light; when the alternating current power supply 100 does not supply power, that is, the adapter is powered off, the photoelectric control module 420 does not work, the charging and discharging control module 430 takes power from the switching power supply 300 to charge, the electric energy is stored, when the stored electric energy is enough to control the switching control module 440 to be switched off, the switching control module 440 controls the indicator lamp 410 to be turned off, furthermore, the turning-off time of the indicator lamp 410 can be controlled by adjusting the charging time of the charging and discharging control module 430, that is, the time from the adapter being powered off to the turning-off of the indicator lamp 410 can be controlled, therefore, the time from the adapter being powered off to the turning-off of the indicator lamp 410 can be shortened by adjusting the charging time, thereby the indicator lamp 410 can be turned off quickly after the adapter being powered off, and.
Compared with the prior art, the utility model discloses pilot lamp circuit 400 shortens pilot lamp 410's extinguishing time through adjusting under the condition that does not increase the adapter consumption, reaches the purpose that pilot lamp 410 extinguishes fast after the adapter outage, solves the problem that results in the misjudgement because of the delay of pilot lamp 410 extinguishes.
Fig. 1 and fig. 2 are also referred to, wherein fig. 2 is a schematic circuit diagram of an embodiment of an indicator light circuit 400 according to the present invention.
In this embodiment, the output end of the photoelectric control module 420 is connected to the output end of the switching power supply 300 through the charging and discharging control module 430, and the control end of the photoelectric control module 420 is connected to the input end of the switching power supply 300; the input terminal of the switching power supply 300 includes a positive input terminal VI + and a negative input terminal VI-, and the output terminal of the switching power supply 300 includes a positive output terminal VO + and a negative output terminal VO-.
In this embodiment, the optoelectronic control module 420 includes a photocoupler U1, a first diode D1, a second diode D2, and a first resistor R1, and the photocoupler U1 includes a primary light emitting diode U1A and a secondary triode U1B; an anode of the first diode D1 is connected to a first input terminal AC1 of the AC power supply 100, and a cathode of the first diode D1 is connected to an anode of a primary-side light emitting diode U1A of the photocoupler U1 via a first resistor R1; an anode of the second diode D2 is connected to the second input terminal AC2 of the AC power supply 100, and a cathode of the second diode D2 is connected to an anode of the primary side light emitting diode U1A of the photocoupler U1 via the first resistor R1; the cathode of the primary side light emitting diode U1A of the photocoupler U1 is used as the control terminal of the photoelectric control module 420 and is connected with the negative input terminal VI-of the switching power supply 300, when the primary side light emitting diode U1A emits light, the secondary side triode U1B is controlled to be turned on, when the primary side light emitting diode U1A does not emit light, the secondary side triode U1B is controlled to be turned off, the collector of the secondary side triode U1B of the photocoupler U1 is connected with the input terminal of the switching control module 440, and the emitter of the secondary side triode U1B of the photocoupler U1 is connected with the negative output terminal VO-of the switching power supply 300.
In this embodiment, the charge and discharge control module 430 includes a capacitor C1 and a second resistor R2; one end of the capacitor C1 is connected with the positive output terminal VO + of the switching power supply 300 through the second resistor R2, and the other end of the capacitor C1 is connected with the negative output terminal VO-of the switching power supply 300; the common end of the second resistor R2 and the capacitor C1 is used as the output end of the charge and discharge control module 430, and is connected to the control end of the switch control module 440.
In the present embodiment, the switch control module 440 includes a first switching element 441 and a second switching element 442; the first switching element 441 is connected to a collector of a secondary transistor U1B of the photocoupler U1, the first switching element 441 is connected to the switching power supply 300, the charge and discharge control module 430, and the second switching element 442, the second switching element 442 is connected to the switching power supply 300, and the second switching element 442 is connected to the indicator lamp 410.
Specifically, the first switching element 441 is a first transistor Q11, the second switching element 442 is a second transistor Q12, and in this embodiment, the first transistor Q11 and the second transistor Q12 are both NPN transistors. The base electrode of the first triode Q11 is connected with the common end of the second resistor R2 and the capacitor C1, the base electrode of the first triode Q11 is connected with the collector electrode of the secondary triode U1B of the photoelectric coupler U1, the collector electrode of the first triode Q11 is connected with the positive output end VO + of the switching power supply 300, the base electrode of the first triode Q11 is connected with the base electrode of the second triode Q12, and the emitter electrode of the first triode Q11 is connected with the negative output end VO-of the switching power supply 300; the collector of the second transistor Q12 is connected to the positive output terminal VO + of the switching power supply 300, and the emitter of the second transistor Q12 is connected to the indicator lamp 410.
Specifically, the switch control module 440 further includes a third resistor R3 and a fourth resistor R4, and the indicator light 410 includes a light emitting diode LED; one end of the third resistor R3 is used as an input end of the switch control module 440 and is connected with the positive output end VO + of the switching power supply 300, and the other end of the third resistor R3 is connected with the collector of the first triode Q11 and the base of the second triode Q12 respectively; the fourth resistor R4 is connected between the emitter of the second transistor Q12 and the anode of the light emitting diode LED, and the cathode of the light emitting diode LED is connected to the negative output terminal VO-of the switching power supply 300.
The operation of the indicator light circuit 400 shown in fig. 2 is described in detail as follows:
when the alternating current power supply 100 supplies power and the instant adapter is electrified, the primary side light emitting diode U1A of the photoelectric coupler U1 obtains electric energy from alternating current input by the alternating current power supply 100 through the first diode D1, the second diode D2 and the first resistor R1, and the primary side light emitting diode U1A of the photoelectric coupler U1 has high sensitivity, so that the primary side light emitting diode U1A of the photoelectric coupler U1 is neglected from the electricity consumption of the alternating current. Meanwhile, as the light emitting diode U1A at the primary side of the photoelectric coupler U1 is powered, the triode U1B at the secondary side of the photoelectric coupler U1 is conducted. The BE junction of the first transistor Q11 is thus shorted by the secondary transistor U1B of the optocoupler U1, and the first transistor Q11 is non-conductive. Since the voltage output by the positive output terminal VO + of the switching power supply 300 is applied to the base of the second transistor Q12 through the third resistor R3, and the second transistor Q12 is turned on, the voltage output by the positive output terminal VO + of the switching power supply 300 is applied to the anode of the light emitting diode LED through the second transistor Q12 and the fourth resistor R4, and the light emitting diode LED emits light, which indicates that the adapter is powered on, indicating that the adapter is not powered off.
When the alternating current power supply 100 does not supply power, that is, the adapter is powered off, the primary side light emitting diode U1A of the photocoupler U1 does not flow current and does not emit light, the secondary side triode U1B of the photocoupler U1 is cut off, the photocoupler U1 does not work, the voltage output by the positive output end VO + of the switching power supply 300 charges the capacitor C1 through the second resistor R2, when the voltage generated on the capacitor C1 is enough to drive the first triode Q11 to be turned on, the capacitor C1 discharges to the first triode Q11, the first triode Q11 is turned on, so that the base potential of the second triode Q12 is pulled low, the second triode Q12 is cut off, the light emitting diode LED loses power and is extinguished, and the light emitting diode LED indicates that the adapter is powered off. Because the charging time of the charging and discharging control module 430 can be adjusted by selecting the resistance value of the second resistor R2 and the capacitance of the capacitor C1, the time from the adapter not being powered on to the LED being turned off can be further controlled, the time from the adapter being powered off to the LED being turned off can be conveniently controlled by adjusting the charging time of the charging and discharging control module 430, the time from the adapter being powered off to the LED being turned off can be properly shortened according to actual needs, and therefore the LED being the indicator light of the adapter being rapidly turned off after the adapter being powered off can be achieved, the adapter being powered off can be indicated, and misjudgment on whether the adapter is powered off or not can be avoided.
Referring to fig. 1 and fig. 3, fig. 3 is a schematic circuit diagram of another embodiment of an indicator light circuit 400 according to the present invention.
In this embodiment, the optoelectronic control module 420 includes a photocoupler U1, a first diode D1, a second diode D2, and a first resistor R1, and the photocoupler U1 includes a primary light emitting diode U1A and a secondary triode U1B; an anode of the first diode D1 is connected to a first input terminal AC1 of the AC power supply 100, and a cathode of the first diode D1 is connected to an anode of a primary-side light emitting diode U1A of the photocoupler U1 via a first resistor R1; an anode of the second diode D2 is connected to the second input terminal AC2 of the AC power supply 100, and a cathode of the second diode D2 is connected to an anode of the primary side light emitting diode U1A of the photocoupler U1 via the first resistor R1; the cathode of the primary side light emitting diode U1A of the photocoupler U1 is used as the control terminal of the photoelectric control module 420 and is connected with the negative input terminal VI-of the switching power supply 300, when the primary side light emitting diode U1A emits light, the secondary side triode U1B is controlled to be turned on, when the primary side light emitting diode U1A does not emit light, the secondary side triode U1B is controlled to be turned off, the collector of the secondary side triode U1B of the photocoupler U1 is connected with the input terminal of the switching control module 440, and the emitter of the secondary side triode U1B of the photocoupler U1 is connected with the negative output terminal VO-of the switching power supply 300.
In this embodiment, the charge and discharge control module 430 includes a capacitor C1 and a second resistor R2; one end of the capacitor C1 is connected with the positive output terminal VO + of the switching power supply 300 through the second resistor R2, and the other end of the capacitor C1 is connected with the negative output terminal VO-of the switching power supply 300; the common end of the second resistor R2 and the capacitor C1 is used as the output end of the charge and discharge control module 430, and is connected to the control end of the switch control module 440.
In the present embodiment, the switch control module 440 includes a first switching element 441 and a second switching element 442; the first switching element 441 is connected to a collector of a secondary transistor U1B of the photocoupler U1, the first switching element 441 is connected to the switching power supply 300, the charge and discharge control module 430, and the second switching element 442, the second switching element 442 is connected to the switching power supply 300, and the second switching element 442 is connected to the indicator lamp 410.
Specifically, the first switching element 441 is a first MOS transistor Q21, the second switching element 442 is a second MOS transistor Q22, and in this embodiment, the first MOS transistor Q21 and the second MOS transistor Q22 are both NMOS transistors; the grid electrode of the first MOS tube Q21 is connected with the common end of the second resistor R2 and the capacitor C1, the grid electrode of the first MOS tube Q21 is connected with the collector electrode of the secondary triode U1B of the photoelectric coupler U1, the drain electrode of the first MOS tube Q21 is connected with the positive output end VO + of the switching power supply 300, the drain electrode of the first MOS tube Q21 is connected with the grid electrode of the second MOS tube Q22, and the source electrode of the first MOS tube Q21 is connected with the negative output end VO-of the switching power supply 300; the drain of the second MOS transistor Q22 is connected to the positive output terminal VO + of the switching power supply 300, and the source of the second MOS transistor Q22 is connected to the indicator light 410.
Specifically, the switch control module 440 further includes a third resistor R3 and a fourth resistor R4, and the indicator light 410 includes a light emitting diode LED; one end of the third resistor R3 is used as an input end of the switch control module 440 and is connected to the positive output terminal VO + of the switching power supply 300, and the other end of the third resistor R3 is connected to the drain of the first MOS transistor Q21 and the gate of the second MOS transistor Q22, respectively; the fourth resistor R4 is connected between the source of the second MOS transistor Q22 and the anode of the light emitting diode LED, and the cathode of the light emitting diode LED is connected to the negative output terminal VO-of the switching power supply 300.
The operation of the indicator light circuit 400 shown in fig. 3 is described in detail as follows:
when the alternating current power supply 100 supplies power and the instant adapter is electrified, the primary side light emitting diode U1A of the photoelectric coupler U1 obtains electric energy from alternating current input by the alternating current power supply 100 through the first diode D1, the second diode D2 and the first resistor R1, and the primary side light emitting diode U1A of the photoelectric coupler U1 has high sensitivity, so that the primary side light emitting diode U1A of the photoelectric coupler U1 is neglected from the electricity consumption of the alternating current. Meanwhile, as the light emitting diode U1A at the primary side of the photoelectric coupler U1 is powered, the triode U1B at the secondary side of the photoelectric coupler U1 is conducted. Therefore, the gate-source of the first MOS transistor Q21 is shorted by the secondary side triode U1B of the photocoupler U1, and the first MOS transistor Q21 is not conducted. Since the voltage output by the positive output terminal VO + of the switching power supply 300 is applied to the gate of the second MOS transistor Q22 through the third resistor R3, and the second MOS transistor Q22 is turned on, the voltage output by the positive output terminal VO + of the switching power supply 300 is applied to the anode of the light emitting diode LED through the second MOS transistor Q22 and the fourth resistor R4, and the light emitting diode LED emits light, and the light emitting diode LED indicates that the adapter is powered, which indicates that the adapter is not powered off.
When the alternating current power supply 100 does not supply power, that is, the adapter is powered off, the primary side light emitting diode U1A of the photocoupler U1 does not flow current and does not emit light, the secondary side triode U1B of the photocoupler U1 is turned off, the photocoupler U1 does not work, the voltage output by the positive output end VO + of the switching power supply 300 charges the capacitor C1 through the second resistor R2, when the voltage generated on the capacitor C1 is enough to drive the first MOS transistor Q21 to be turned on, the capacitor C1 discharges to the first MOS transistor Q21, the first MOS transistor Q21 is turned on, so that the gate potential of the second MOS transistor Q22 is pulled low, the second MOS transistor Q22 is turned off, the light emitting diode LED loses power and turns off, and the light emitting diode LED indicates that the adapter is powered off. Because the charging time of the charging and discharging control module 430 can be adjusted by selecting the resistance value of the second resistor R2 and the capacitance of the capacitor C1, the time from the adapter not being powered on to the LED being turned off can be further controlled, the time from the adapter being powered off to the LED being turned off can be conveniently controlled by adjusting the charging time of the charging and discharging control module 430, the time from the adapter being powered off to the LED being turned off can be properly shortened according to actual needs, and therefore the LED being the indicator light of the adapter being rapidly turned off after the adapter being powered off can be achieved, the adapter being powered off can be indicated, and misjudgment on whether the adapter is powered off or not can be avoided.
Compared with the prior art, the utility model provides an indicator lamp circuit 400 adjusts the charge time through electric capacity C1 and second resistance R2 in charge-discharge control module 430 to the time that indicator lamp 410 extinguishes after the control adapter outage, can realize that adapter outage back indicator lamp 410 extinguishes fast, under the condition that does not increase the adapter consumption, reached the purpose that adapter outage back indicator lamp 410 extinguishes fast, solved because of the delay of indicator lamp 410 extinguishes and lead to the problem of misjudgement.
The utility model discloses still provide an adapter, this adapter includes AC power supply 100, rectification filter circuit 200, switching power supply 300 and indicator lamp circuit 400, indicator lamp circuit 400 is connected with AC power supply 100 and switching power supply 300 respectively, and rectification filter circuit 200 is connected between AC power supply 100 and switching power supply 300, and wherein the circuit structure of indicator lamp circuit 400, theory of operation and the beneficial effect who brings all refer to above-mentioned embodiment, and the here is no longer repeated.
The above only is the preferred embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structures or equivalent flow changes made by the contents of the specification and the drawings, or directly or indirectly applied to other related technical fields, are included in the same way in the protection scope of the present invention.
Claims (10)
1. An indicator light circuit is used for controlling and indicating an indicator light of an adapter to emit light or extinguish, is respectively connected with an alternating current power supply and a switch power supply of the adapter, and comprises the indicator light; wherein,
the input end of the photoelectric control module is connected with the alternating current power supply, and the output end of the photoelectric control module is connected with the control end of the switch control module; the input end of the charge and discharge control module is connected with the output end of the switching power supply, and the output end of the charge and discharge control module is connected with the control end of the switching control module; the input end of the switch control module is connected with the output end of the switch power supply, and the output end of the switch control module is connected with the indicator lamp.
2. The indicator light circuit according to claim 1, wherein an output end of the photoelectric control module is connected with an output end of the switching power supply through the charge-discharge control module, and a control end of the photoelectric control module is connected with an input end of the switching power supply; the input end of the switching power supply comprises a positive input end and a negative input end, and the output end of the switching power supply comprises a positive output end and a negative output end.
3. The indicator light circuit according to claim 2, wherein the optoelectronic control module comprises an optocoupler, a first diode, a second diode, and a first resistor, the optocoupler comprising a primary side light emitting diode and a secondary side triode; the anode of the first diode is connected with the first input end of the alternating current power supply, and the cathode of the first diode is connected with the anode of the primary side light-emitting diode through the first resistor; the anode of the second diode is connected with the second input end of the alternating current power supply, and the cathode of the second diode is connected with the anode of the primary side light-emitting diode through the first resistor; the cathode of the primary side light emitting diode is used as the control end of the photoelectric control module and is connected with the negative input end of the switching power supply, the collector of the secondary side triode is used as the output end of the photoelectric control module and is connected with the switching control module, and the emitter of the secondary side triode is connected with the negative output end of the switching power supply.
4. The indicator light circuit according to claim 3, wherein the charge and discharge control module comprises a capacitor and a second resistor; one end of the capacitor is connected with the positive output end of the switching power supply through the second resistor, and the other end of the capacitor is connected with the negative output end of the switching power supply; and the common end of the second resistor and the capacitor is used as the output end of the charge and discharge control module and is connected with the control end of the switch control module.
5. The indicator light circuit according to claim 4, wherein the switch control module comprises a first switching element and a second switching element; the first switch element is connected with a collector of a secondary triode of the photoelectric coupler and respectively connected with the switching power supply, the charge and discharge control module and the second switch element, and the second switch element is connected with the switching power supply and the indicator light.
6. The indicator light circuit according to claim 5, wherein the first switching element is a first transistor and the second switching element is a second transistor; the base electrode of the first triode is connected with the common end of the second resistor and the capacitor and is connected with the collector electrode of the secondary triode of the photoelectric coupler, the collector electrode of the first triode is connected with the positive output end of the switching power supply and is connected with the base electrode of the second triode, and the emitter electrode of the first triode is connected with the negative output end of the switching power supply; and the collector of the second triode is connected with the positive output end of the switching power supply, and the emitter of the second triode is connected with the indicator light.
7. The indicator light circuit of claim 6, wherein the switch control module further comprises a third resistor and a fourth resistor, the indicator light comprising a light emitting diode; one end of the third resistor is used as the input end of the switch control module and is connected with the positive output end of the switch power supply, and the other end of the third resistor is respectively connected with the collector electrode of the first triode and the base electrode of the second triode; the fourth resistor is connected between the emitting electrode of the second triode and the anode of the light-emitting diode, and the cathode of the light-emitting diode is connected with the negative output end of the switching power supply.
8. The indicator light circuit according to claim 5, wherein the first switching element is a first MOS transistor, and the second switching element is a second MOS transistor; the grid electrode of the first MOS tube is connected with the common end of the second resistor and the capacitor and is connected with the collector electrode of a secondary triode of the photoelectric coupler, the drain electrode of the first MOS tube is connected with the positive output end of the switching power supply and is connected with the grid electrode of the second MOS tube, and the source electrode of the first MOS tube is connected with the negative output end of the switching power supply; the drain electrode of the second MOS tube is connected with the positive output end of the switching power supply, and the source electrode of the second MOS tube is connected with the indicator lamp.
9. The indicator light circuit of claim 8, wherein the switch control module further comprises a third resistor and a fourth resistor, the indicator light comprising a light emitting diode; one end of the third resistor is used as the input end of the switch control module and is connected with the positive output end of the switch power supply, and the other end of the third resistor is respectively connected with the drain electrode of the first MOS tube and the grid electrode of the second MOS tube; the fourth resistor is connected between the source electrode of the second MOS tube and the anode of the light-emitting diode, and the cathode of the light-emitting diode is connected with the negative output end of the switching power supply.
10. An adapter, comprising an ac power supply, a rectifying and filtering circuit and a switching power supply, characterized by further comprising an indicator light circuit according to any one of claims 1 to 9, the indicator light circuit being connected to the ac power supply and the switching power supply, respectively, the rectifying and filtering circuit being connected between the ac power supply and the switching power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202056430U CN203243559U (en) | 2013-04-22 | 2013-04-22 | Indication lamp circuit and adapter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202056430U CN203243559U (en) | 2013-04-22 | 2013-04-22 | Indication lamp circuit and adapter |
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| Publication Number | Publication Date |
|---|---|
| CN203243559U true CN203243559U (en) | 2013-10-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2013202056430U Expired - Fee Related CN203243559U (en) | 2013-04-22 | 2013-04-22 | Indication lamp circuit and adapter |
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| Country | Link |
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| CN (1) | CN203243559U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104315442A (en) * | 2014-11-13 | 2015-01-28 | 林锋 | LED sound control lamp |
| CN104780637A (en) * | 2014-01-10 | 2015-07-15 | 海洋王（东莞）照明科技有限公司 | Control circuit and lighting device |
| CN105959600A (en) * | 2016-06-29 | 2016-09-21 | 重庆惠科金扬科技有限公司 | Circuit capable of quickly turning off TV indicator lamp after power off, and television |
-
2013
- 2013-04-22 CN CN2013202056430U patent/CN203243559U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104780637A (en) * | 2014-01-10 | 2015-07-15 | 海洋王（东莞）照明科技有限公司 | Control circuit and lighting device |
| CN104780637B (en) * | 2014-01-10 | 2019-10-15 | 海洋王（东莞）照明科技有限公司 | A kind of control circuit and lighting device |
| CN104315442A (en) * | 2014-11-13 | 2015-01-28 | 林锋 | LED sound control lamp |
| CN105959600A (en) * | 2016-06-29 | 2016-09-21 | 重庆惠科金扬科技有限公司 | Circuit capable of quickly turning off TV indicator lamp after power off, and television |
| CN105959600B (en) * | 2016-06-29 | 2023-04-07 | 重庆惠科金扬科技有限公司 | Circuit for quickly turning off TV indicator lamp after power failure and television |
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Granted publication date: 20131016 |