CN103425071B - Switching Power Supply energy efficiency control circuit - Google Patents
Switching Power Supply energy efficiency control circuit Download PDFInfo
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- CN103425071B CN103425071B CN201310359686.9A CN201310359686A CN103425071B CN 103425071 B CN103425071 B CN 103425071B CN 201310359686 A CN201310359686 A CN 201310359686A CN 103425071 B CN103425071 B CN 103425071B
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Abstract
The present invention relates to Switching Power Supply energy efficiency control circuit, it includes switching power circuit, in working order time, provides running voltage for holding circuit；Wake-up circuit, for when holding state, after receiving audio signal, drives on-off circuit conducting, so that power supply circuits provide running voltage by on-off circuit for PWM controller；And holding circuit, for in working order time, when receiving lasting audio signal, drive on-off circuit conducting the most constantly, after not receiving audio signal in certain Preset Time, on-off circuit is then driven to close, so that power supply circuits can not provide running voltage by on-off circuit for PWM controller.Common Switching Power Supply, by the detection to audio signal, is directly controlled by the present invention, it is achieved automatically into holding state and the function that automatically wakens up, and make standby energy consumption maintain the lowest level.
Description
Technical Field
The invention relates to an energy efficiency control circuit, in particular to a switching power supply energy efficiency control circuit.
Background
The implementation of energy efficiency standards, such as ErP, puts new demands on the design of audio power amplifiers. ErP requires that the audio power amplifier automatically enter a standby state after a certain time without being used, and requires that the power consumption at this time is less than a certain standard (e.g., 0.5W). In order to meet this requirement, the most common method is to use a switching power supply conforming to the green standard and a power amplifier chip with a standby function. However, such a solution greatly drives up the cost of the product and requires the introduction of large amounts of new materials, which presents a significant challenge in upgrading existing product lines.
Disclosure of Invention
The invention aims to provide a switching power supply energy efficiency control circuit which can solve the problem of high cost.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the energy efficiency control circuit of the switching power supply comprises a switching power supply circuit with a PWM controller, a wake-up circuit, a maintaining circuit, a switching circuit and a power supply circuit, wherein the switching power supply circuit, the wake-up circuit and the power supply circuit are all connected with commercial power;
the switching power supply circuit is used for providing working voltage for the maintaining circuit in a working state;
the wake-up circuit is used for driving the switching circuit to be switched on after receiving the audio signal in a standby state so as to enable the power supply circuit to provide working voltage for the PWM controller through the switching circuit;
the maintaining circuit is used for continuously driving the switching circuit to be switched on when receiving continuous audio signals in a working state, and driving the switching circuit to be switched off when not receiving the audio signals within a certain preset time, so that the power supply circuit can not provide working voltage for the PWM controller through the switching circuit;
wherein,
the working state is as follows: the PWM controller and the maintaining circuit are powered on to work;
the standby state is as follows: and both the PWM controller and the maintaining circuit are powered down and stop working.
Preferably, the maintaining circuit includes a chip IC8, a capacitor C108, a capacitor C62, a resistor R132, a resistor R116, a resistor R117, a resistor R121, a transistor Q12, a capacitor C38, a resistor R122, a resistor R124, a diode D4, a transistor Q4, a resistor R125, a capacitor C80, a capacitor C56, a resistor R130, a diode D12, and a resistor R28; one end of a capacitor C62 is grounded through a capacitor C108, one end of a capacitor C62 is used for receiving audio signals, the other end of a capacitor C62 is connected with the base electrode of the triode Q12 through a resistor R116, the other end of a capacitor C62 is grounded through a resistor R132, and the other end of a capacitor C62 is also connected with the collector electrode of the triode Q12 through a resistor R117; the emitter of the triode Q12 is grounded, the collector of the triode Q12 is connected with the power supply end + VCC of the switching power supply circuit through a resistor R121, and the collector of the triode Q12 is also connected with the base of the triode Q4 through a capacitor C38 and a resistor R122 in sequence; the base electrode of the triode Q4 is also connected with the power supply end + VCC of the switching power supply circuit through a resistor R124 and a resistor R28 in sequence, and a diode D4 is connected with the resistor R124 in parallel; an emitter of the triode Q4 is connected with a power supply end + VCC of the switching power supply circuit through a resistor R28; a power supply end VDD of the chip IC8 and one end of a capacitor C80 are both connected with an emitter of the triode Q4, and the other end of the capacitor C80 is grounded; an input end IN of the chip IC8, one end of a capacitor C56 and one end of a resistor R125 are all connected with a collector of the triode Q4, and the other end of the capacitor C56 and the other end of the resistor R125 are all grounded; an output end OUT of the chip IC8 is connected with a first input end of the switch circuit through a resistor R130 and a diode D12 in sequence; the mains comprises an input AC1 and an input AC 2.
Preferably, the wake-up circuit comprises a capacitor C58, a capacitor C59, a diode D6, a diode D5, a diode D7, a diode D8, a capacitor C107, a capacitor C101, a voltage regulator ZD4, a transistor Q13, a resistor R104, a capacitor C112, a diode D9, a resistor R109, a resistor R107, a capacitor C61, a diode D10, a resistor R108, a capacitor C111, a diode D3, a resistor R97, a capacitor C104, a transistor Q14, a resistor R98, a resistor R103, a resistor R102, a resistor R101, a capacitor C103, a resistor R106 and a capacitor C208; one end of the capacitor C103 is grounded through a capacitor C208, one end of the capacitor C103 is used for receiving an audio signal, the other end of the capacitor C103 is connected with the base electrode of the triode Q14 through a resistor R98, and the other end of the capacitor C103 is also grounded through a resistor R106; the emitter of the triode Q14 is grounded; the mains comprises an input AC1 and an input AC 2; the input end AC1 is connected with an emitter of the triode Q13 through a capacitor C58 and a diode D8 in sequence, and the capacitor C58 is grounded through a diode D6; the input end AC2 is connected with an emitter of the triode Q13 through a capacitor C59 and a diode D7 in sequence, and the capacitor C59 is grounded through a diode D5; one end of a capacitor C107, one end of a capacitor C101 and one end of a voltage regulator tube ZD4 are all connected with an emitter of a triode Q13; the other end of the capacitor C107, the other end of the capacitor C101 and the other end of the voltage regulator tube ZD4 are all grounded; one end of the resistor R104 is connected with the collector of the triode Q13, the other end of the resistor R104 is grounded through the capacitor C112, and the other end of the resistor R104 is also connected with the first input end of the switch circuit; one end of the resistor R107 is connected with the power supply end + VCC of the switching power supply circuit, and the other end of the resistor R107 is grounded through the capacitor C61 and the capacitor C111 in sequence; the cathode of the diode D10 is connected with the other end of the capacitor R104, the anode of the diode D10 is connected between the capacitor C61 and the capacitor C111, and the resistor R108 is connected in parallel with the diode D10; the cathode of the diode D3 is connected with the emitter of the triode Q13, the anode of the diode D3 is connected with the base of the triode Q13, the anode of the diode D3 is also connected with the collector of the triode Q14 sequentially through a resistor R97 and a capacitor C104, and a resistor R103 is connected with the diode D3 in parallel; the power supply end + VCC of the switching power supply circuit is grounded through a diode D9, a resistor R109, a resistor R102, a resistor R101 and a resistor R106 in sequence, and the collector of the triode Q14 is connected between the resistor R102 and the resistor R101; the emitter of the transistor Q13 is also connected between the resistor R109 and the resistor R102; the emitter of transistor Q13 is also coupled to a second input of the switching circuit.
Preferably, the switch circuit comprises a resistor R92, a resistor R105, a capacitor C106, a voltage regulator tube ZD2, a triode Q10, a triode Q9, a resistor R111, a resistor R110, a photocoupler IC9, a resistor R114, a resistor R115, a resistor R99, a capacitor C39, a resistor R86, a triode Q5, a triode Q8, a resistor R112, a resistor R85, a voltage regulator tube ZD5, a triode Q7 and a resistor R77; one end of a resistor R92 is connected with an emitter of the triode Q13, the other end of the resistor R92 is connected with the positive input end of a photoelectric coupler IC9 through a resistor R105, and the negative output end of the photoelectric coupler IC9 is connected with a resistor R92 through a voltage-regulator tube ZD 2; one end of the capacitor C106 is connected with the positive input end of the photoelectric coupler IC9, and the other end of the capacitor C106 is connected with the negative output end of the photoelectric coupler IC 9; an emitter of the triode Q10 is connected with a negative electrode output end of the photoelectric coupler IC9, a base electrode of the triode Q10 is connected with a collector of the triode Q9, a collector of the triode Q10 is connected with an emitter of the triode Q9 through a resistor R111, and a collector of the triode Q10 is grounded; the base of the transistor Q9 is grounded through a resistor R110; one end of the resistor R92 is used as the second input end of the switch circuit, and the base of the triode Q9 is used as the first input end of the switch circuit; the output end of the emitter of the photoelectric coupler IC9 is grounded through a resistor R115; the collector input end of the photoelectric coupler IC9 is connected with the base electrode of the triode Q8 through a resistor R114, the collector input end of the photoelectric coupler IC9 is further connected with the base electrode of the triode Q5 through the resistor R114, a resistor R99 and a resistor R112 in sequence, the emitter electrode of the triode Q5 is connected between the resistor R99 and the resistor R112, the collector electrode of the triode Q5 is connected with the base electrode of the triode Q8, and the emitter electrode of the triode Q8 is grounded; the base electrode of the triode Q8 is grounded through a resistor R86, and the collector electrode of the triode Q5 is grounded through a capacitor C39; the collector of the triode Q7 is connected with the emitter of the triode Q5 through a resistor R85, the emitter of the triode Q7 is grounded through a resistor R77, the base of the triode Q7 is grounded through a voltage regulator tube ZD5, and the base of the triode Q7 is also connected with the emitter of the triode Q5; the voltage output end VDD of the power supply circuit is connected with the collector of a triode Q7 through a resistor R113, and the emitter of a triode Q7 is connected with the power supply end VDD of the PWM controller.
Preferably, the power supply circuit comprises a resistor R222, a resistor R123, a diode D40, a resistor R119, a resistor R120, a resistor R118, a capacitor C37 and a capacitor C36; the input end AC1 is connected with the resistor R113 sequentially through the resistor R22, the diode D40, the resistor R119 and the resistor R120, and the connection node of the resistor R120 and the resistor R113 is used as a voltage output end VDD of the power supply circuit; the input terminal AC1 is also connected between the resistor R222 and the diode D40 through the resistor R123; the resistor R120 is also grounded through a resistor R118, a capacitor C37 and a capacitor C36, respectively.
The invention has the following beneficial effects:
the common switching power supply is directly controlled by detecting the audio signal, so that the functions of automatically entering a standby state and automatically waking up are realized, and the standby energy consumption is maintained at a very low level. When the energy efficiency control circuit is used, the energy efficiency control circuit is directly connected to a common switching power supply circuit, a switching power supply chip meeting the green standard does not need to be replaced, a power amplifier chip with a standby function does not need to be replaced, the original non-ErP product can be conveniently upgraded, the cost is greatly saved, and the development period is also accelerated.
Drawings
Fig. 1 is a schematic block diagram of the application of the present invention in an audio power amplifier;
FIG. 2 is a schematic block diagram of an energy efficiency control circuit of the switching power supply of the present invention;
FIG. 3 is a circuit diagram of an energy efficiency control circuit of the switching power supply of the present invention;
fig. 4 is an enlarged view of the switching power supply circuit in fig. 3;
FIG. 5 is an enlarged view of the power supply circuit of FIG. 3 (partially shown in FIG. 4);
FIG. 6 is an enlarged view of the switching circuit of FIG. 3;
FIG. 7 is an enlarged view of the wake-up circuit of FIG. 3;
fig. 8 is an enlarged view of the sustain circuit in fig. 3.
Detailed Description
The invention is further described with reference to the following drawings and detailed description.
As shown in fig. 1, the present embodiment can be applied to an audio power amplifier. The energy efficiency control circuit 1 controls the working state of the switching power supply circuit 2 according to the existence of the audio signal 100, and the switching power supply circuit 2 is used for driving the audio power amplifier 3 to work, so that the audio power amplifier 3 processes the audio signal 100, and music is played. It should be noted that the switching power supply circuit 2 of the present embodiment is a common switching power supply chip, and does not have a switching power supply chip with a green function, and the audio power amplifier 3 is also a common audio power amplifier without a standby function.
As shown in fig. 2, the energy efficiency control circuit of the switching power supply of the present embodiment includes a switching power supply circuit 2 having a PWM controller 21, a wake-up circuit 11, a sustain circuit 12, a switching circuit 13, and a power supply circuit 14, wherein the switching power supply circuit 2, the wake-up circuit 11, and the power supply circuit 14 are all connected to the mains supply. The switching power supply circuit 2 is used for providing working voltage for the maintaining circuit 12 in a working state; the wake-up circuit 11 is configured to, in a standby state, drive the switch circuit 13 to be turned on after receiving the audio signal 100, so that the power supply circuit 14 provides a working voltage for the PWM controller 21 through the switch circuit 13; the maintaining circuit 12 is configured to, in an operating state, continuously drive the switch circuit 13 to be turned on when receiving a continuous audio signal 100, and drive the switch circuit 13 to be turned off when receiving no audio signal 100 within a certain preset time, so that the power supply circuit 14 cannot provide a working voltage for the PWM controller 21 through the switch circuit 13, and the switching power supply circuit 2 also stops operating due to power failure and stop operating of the PWM controller 21. Wherein, the working state is as follows: the PWM controller 21 and the maintaining circuit 12 are powered on to work; the standby state is as follows: both PWM controller 21 and sustain circuit 12 are powered down and stopped.
Fig. 3 to 8 show a specific circuit structure of an energy efficiency control circuit of a switching power supply according to this embodiment.
The maintaining circuit 12 comprises a chip IC8, a capacitor C108, a capacitor C62, a resistor R132, a resistor R116, a resistor R117, a resistor R121, a transistor Q12, a capacitor C38, a resistor R122, a resistor R124, a diode D4, a transistor Q4, a resistor R125, a capacitor C80, a capacitor C56, a resistor R130, a diode D12 and a resistor R28; one end of a capacitor C62 is grounded through a capacitor C108, one end of a capacitor C62 is used for receiving the audio signal 100, the other end of a capacitor C62 is connected with the base electrode of the triode Q12 through a resistor R116, the other end of a capacitor C62 is grounded through a resistor R132, and the other end of a capacitor C62 is also connected with the collector electrode of the triode Q12 through a resistor R117; the emitter of the triode Q12 is grounded, the collector of the triode Q12 is connected with the power supply end + VCC of the switching power supply circuit 2 through a resistor R121, and the collector of the triode Q12 is also connected with the base of the triode Q4 through a capacitor C38 and a resistor R122 in sequence; the base electrode of the triode Q4 is also connected with the power supply end + VCC of the switching power supply circuit 2 through a resistor R124 and a resistor R28 in sequence, and a diode D4 is connected with the resistor R124 in parallel; an emitter of the triode Q4 is connected with the power supply end + VCC of the switching power supply circuit 2 through a resistor R28; a power supply end VDD of the chip IC8 and one end of a capacitor C80 are both connected with an emitter of the triode Q4, and the other end of the capacitor C80 is grounded; an input end IN of the chip IC8, one end of a capacitor C56 and one end of a resistor R125 are all connected with a collector of the triode Q4, and the other end of the capacitor C56 and the other end of the resistor R125 are all grounded; an output end OUT of the chip IC8 is connected with a first input end of the switch circuit 13 through a resistor R130 and a diode D12 in sequence; the mains comprises an input AC1 and an input AC 2.
The wake-up circuit 11 comprises a capacitor C58, a capacitor C59, a diode D6, a diode D5, a diode D7, a diode D8, a capacitor C107, a capacitor C101, a voltage regulator ZD4, a triode Q13, a resistor R104, a capacitor C112, a diode D9, a resistor R109, a resistor R107, a capacitor C61, a diode D10, a resistor R108, a capacitor C111, a diode D3, a resistor R97, a capacitor C104, a triode Q14, a resistor R98, a resistor R103, a resistor R102, a resistor R101, a capacitor C103, a resistor R106 and a capacitor C208; one end of a capacitor C103 is grounded through a capacitor C208, one end of the capacitor C103 is used for receiving the audio signal 100, the other end of the capacitor C103 is connected with the base electrode of the triode Q14 through a resistor R98, and the other end of the capacitor C103 is also grounded through a resistor R106; the emitter of the triode Q14 is grounded; the input end AC1 is connected with an emitter of the triode Q13 through a capacitor C58 and a diode D8 in sequence, and the capacitor C58 is grounded through a diode D6; the input end AC2 is connected with an emitter of the triode Q13 through a capacitor C59 and a diode D7 in sequence, and the capacitor C59 is grounded through a diode D5; one end of a capacitor C107, one end of a capacitor C101 and one end of a voltage regulator tube ZD4 are all connected with an emitter of a triode Q13; the other end of the capacitor C107, the other end of the capacitor C101 and the other end of the voltage regulator tube ZD4 are all grounded; one end of the resistor R104 is connected to the collector of the transistor Q13, the other end of the resistor R104 is grounded through the capacitor C112, and the other end of the resistor R104 is further connected to the first input end of the switch circuit 13; one end of the resistor R107 is connected with the power supply end + VCC of the switching power supply circuit 2, and the other end of the resistor R107 is grounded through the capacitor C61 and the capacitor C111 in sequence; the cathode of the diode D10 is connected with the other end of the capacitor R104, the anode of the diode D10 is connected between the capacitor C61 and the capacitor C111, and the resistor R108 is connected in parallel with the diode D10; the cathode of the diode D3 is connected with the emitter of the triode Q13, the anode of the diode D3 is connected with the base of the triode Q13, the anode of the diode D3 is also connected with the collector of the triode Q14 sequentially through a resistor R97 and a capacitor C104, and a resistor R103 is connected with the diode D3 in parallel; the power supply end + VCC of the switching power supply circuit 2 is grounded through a diode D9, a resistor R109, a resistor R102, a resistor R101 and a resistor R106 in sequence, and the collector of the triode Q14 is connected between the resistor R102 and the resistor R101; the emitter of the transistor Q13 is also connected between the resistor R109 and the resistor R102; the emitter of transistor Q13 is also coupled to a second input of switching circuit 13.
The switch circuit 13 comprises a resistor R92, a resistor R105, a capacitor C106, a voltage regulator tube ZD2, a triode Q10, a triode Q9, a resistor R111, a resistor R110, a photoelectric coupler IC9, a resistor R114, a resistor R115, a resistor R99, a capacitor C39, a resistor R86, a triode Q5, a triode Q8, a resistor R112, a resistor R85, a voltage regulator tube ZD5, a triode Q7 and a resistor R77; one end of a resistor R92 is connected with an emitter of the triode Q13, the other end of the resistor R92 is connected with the positive input end of a photoelectric coupler IC9 through a resistor R105, and the negative output end of the photoelectric coupler IC9 is connected with a resistor R92 through a voltage-regulator tube ZD 2; one end of the capacitor C106 is connected with the positive input end of the photoelectric coupler IC9, and the other end of the capacitor C106 is connected with the negative output end of the photoelectric coupler IC 9; an emitter of the triode Q10 is connected with a negative electrode output end of the photoelectric coupler IC9, a base electrode of the triode Q10 is connected with a collector of the triode Q9, a collector of the triode Q10 is connected with an emitter of the triode Q9 through a resistor R111, and a collector of the triode Q10 is grounded; the base of the transistor Q9 is grounded through a resistor R110; one end of the resistor R92 is used as the second input end of the switch circuit 13, and the base of the transistor Q9 is used as the first input end of the switch circuit 13; the output end of the emitter of the photoelectric coupler IC9 is grounded through a resistor R115; the collector input end of the photoelectric coupler IC9 is connected with the base electrode of the triode Q8 through a resistor R114, the collector input end of the photoelectric coupler IC9 is further connected with the base electrode of the triode Q5 through the resistor R114, a resistor R99 and a resistor R112 in sequence, the emitter electrode of the triode Q5 is connected between the resistor R99 and the resistor R112, the collector electrode of the triode Q5 is connected with the base electrode of the triode Q8, and the emitter electrode of the triode Q8 is grounded; the base electrode of the triode Q8 is grounded through a resistor R86, and the collector electrode of the triode Q5 is grounded through a capacitor C39; the collector of the triode Q7 is connected with the emitter of the triode Q5 through a resistor R85, the emitter of the triode Q7 is grounded through a resistor R77, the base of the triode Q7 is grounded through a voltage regulator tube ZD5, and the base of the triode Q7 is also connected with the emitter of the triode Q5; the voltage output terminal VDD of the power supply circuit 14 is connected to the collector of a transistor Q7 through a resistor R113, and the emitter of the transistor Q7 is connected to the power supply terminal VDD of the PWM controller 21 (i.e., the chip IC40 in the figure).
The power supply circuit comprises a resistor R222, a resistor R123, a diode D40, a resistor R119, a resistor R120, a resistor R118, a capacitor C37 and a capacitor C36; the input end AC1 is connected with the resistor R113 sequentially through the resistor R22, the diode D40, the resistor R119 and the resistor R120, and the connection node of the resistor R120 and the resistor R113 is used as a voltage output end VDD of the power supply circuit 14; the input terminal AC1 is also connected between the resistor R222 and the diode D40 through the resistor R123; the resistor R120 is also grounded through a resistor R118, a capacitor C37 and a capacitor C36, respectively.
Since the switching power supply circuit 2 of the present embodiment is a common conventional circuit, the working principle thereof will not be described herein. The working process of the switching power supply energy efficiency control circuit of the embodiment is as follows:
1. normal working state
The audio signal 100 is amplified by the transistor Q12, so that the transistor Q4 is turned on, and an input signal at the input terminal IN of the chip IC8 is at a high level, so that the output terminal OUT of the chip IC8 outputs a high level, and the transistor Q9 and the transistor Q10 are turned on. At this time, the diode of the photoelectric coupler IC9 has current flowing through it, the photoelectric coupler IC9 is turned on, the triode Q5 and the triode Q8 are turned off, the triode Q7 is turned on, and the power supply terminal VDD of the PWM controller 21 (i.e., the chip IC 40) is normally supplied with power by the power supply circuit 14, so that the switching power supply circuit 2 also normally operates, the switching power supply circuit 2 normally supplies operating voltage to the chip IC8, and the whole system normally operates.
2. Enter a standby state
IN the absence of the audio signal 100, the transistor Q4 is turned off, and the input signal at the input terminal IN of the chip IC8 is at a low level. At this time, the timer inside the chip IC8 is controlled to start, if the input signal is continuously at the low level for a certain preset time (for example, 60 minutes), the output terminal OUT of the chip IC8 outputs the low level, and since the wake-up circuit 11 is not driven by the audio signal 100, the transistor Q9 and the transistor Q10 are cut off, the diode of the photocoupler IC9 does not pass through the current, the photocoupler IC9 is cut off, so that the transistor Q5 and the transistor Q8 are turned on, and the transistor Q7 is cut off. The power supply line of the PWM controller 21 is cut off and the power supply circuit 14 cannot supply the operating voltage to the PWM controller 21. When the voltage on the capacitor C43 drops to the undervoltage of the PWM controller 21, the PWM controller 21 stops operating, and the switching power supply circuit 2 stops supplying power, so that the standby power consumption of the whole system is maintained at a small level.
3. Wake-up
When the system is in a standby state, a rectifying circuit composed of a capacitor C58, a capacitor C59, a diode D5, a diode D6, a diode D7, a diode D8, a capacitor C107, a capacitor C101 and a voltage regulator ZD4 maintains a voltage on the secondary side to supply power to the wake-up circuit 11. If a music signal 100 is input, the audio signal 100 is amplified by the transistor Q14, thereby turning on the transistor Q13, and thus the transistor Q9 and the transistor Q10. At this time, the diode of the photocoupler IC9 has current flowing through it, the photocoupler IC9 is turned on, the transistor Q5 and the transistor Q8 are turned off, the transistor Q7 is turned on, the power supply terminal VDD of the PWM controller 21 is normally powered, and when the voltage on the capacitor C43 rises to the starting voltage of the PWM controller 21 through the resistor R52, the resistor R65, and the transistor Q7, the whole system resumes normal operation.
Various other changes and modifications to the above-described embodiments and concepts will become apparent to those skilled in the art from the above description, and all such changes and modifications are intended to be included within the scope of the present invention as defined in the appended claims.
Claims (4)
1. The switch power supply energy efficiency control circuit is characterized by comprising a switch power supply circuit with a PWM controller, a wake-up circuit, a maintaining circuit, a switch circuit and a power supply circuit, wherein the switch power supply circuit, the wake-up circuit and the power supply circuit are all connected with commercial power;
the switching power supply circuit is used for providing working voltage for the maintaining circuit in a working state;
the wake-up circuit is used for driving the switching circuit to be switched on after receiving the audio signal in a standby state so as to enable the power supply circuit to provide working voltage for the PWM controller through the switching circuit;
the maintaining circuit is used for maintaining the state of the audio signal when receiving the continuous audio signal,
the switching circuit is continuously driven to be conducted, and when the audio signal cannot be received within a certain preset time, the switching circuit is driven to be closed, so that the power supply circuit cannot provide working voltage for the PWM controller through the switching circuit;
wherein,
the working state is as follows: the PWM controller and the maintaining circuit are powered on to work;
the standby state is as follows: the PWM controller and the maintaining circuit are both powered down and stop working;
the maintaining circuit comprises a chip IC8, a capacitor C108, a capacitor C62, a resistor R132, a resistor R116, a resistor R117, a resistor R121, a triode Q12, a capacitor C38, a resistor R122, a resistor R124, a diode D4, a triode Q4, a resistor R125, a capacitor C80, a capacitor C56, a resistor R130, a diode D12 and a resistor R28; one end of a capacitor C62 is grounded through a capacitor C108, one end of a capacitor C62 is used for receiving audio signals, the other end of a capacitor C62 is connected with the base electrode of the triode Q12 through a resistor R116, the other end of a capacitor C62 is grounded through a resistor R132, and the other end of a capacitor C62 is also connected with the collector electrode of the triode Q12 through a resistor R117; the emitter of the triode Q12 is grounded, the collector of the triode Q12 is connected with the power supply end + VCC of the switching power supply circuit through a resistor R121, and the collector of the triode Q12 is also connected with the base of the triode Q4 through a capacitor C38 and a resistor R122 in sequence; the base electrode of the triode Q4 is also connected with the power supply end + VCC of the switching power supply circuit through a resistor R124 and a resistor R28 in sequence, and a diode D4 is connected with the resistor R124 in parallel; an emitter of the triode Q4 is connected with a power supply end + VCC of the switching power supply circuit through a resistor R28; a power supply end VDD of the chip IC8 and one end of a capacitor C80 are both connected with an emitter of the triode Q4, and the other end of the capacitor C80 is grounded; an input end IN of the chip IC8, one end of a capacitor C56 and one end of a resistor R125 are all connected with a collector of the triode Q4, and the other end of the capacitor C56 and the other end of the resistor R125 are all grounded; an output end OUT of the chip IC8 is connected with a first input end of the switch circuit through a resistor R130 and a diode D12 in sequence; the mains comprises an input AC1 and an input AC 2.
2. The switching power supply energy efficiency control circuit according to claim 1, wherein the wake-up circuit comprises a capacitor C58, a capacitor C59, a diode D6, a diode D5, a diode D7, a diode D8, a capacitor C107, a capacitor C101, a voltage regulator ZD4, a transistor Q13, a resistor R104, a capacitor C112, a diode D9, a resistor R109, a resistor R107, a capacitor C61, a diode D10, a resistor R108, a capacitor C111, a diode D3, a resistor R97, a capacitor C104, a transistor Q14, a resistor R98, a resistor R103, a resistor R102, a resistor R101, a capacitor C103, a resistor R106 and a capacitor C208; one end of the capacitor C103 is grounded through a capacitor C208, one end of the capacitor C103 is used for receiving an audio signal, the other end of the capacitor C103 is connected with the base electrode of the triode Q14 through a resistor R98, and the other end of the capacitor C103 is also grounded through a resistor R106; the emitter of the triode Q14 is grounded; the mains comprises an input AC1 and an input AC 2; the input end AC1 is connected with an emitter of the triode Q13 through a capacitor C58 and a diode D8 in sequence, and the capacitor C58 is grounded through a diode D6; the input end AC2 is connected with an emitter of the triode Q13 through a capacitor C59 and a diode D7 in sequence, and the capacitor C59 is grounded through a diode D5; one end of a capacitor C107, one end of a capacitor C101 and one end of a voltage regulator tube ZD4 are all connected with an emitter of a triode Q13; the other end of the capacitor C107, the other end of the capacitor C101 and the other end of the voltage regulator tube ZD4 are all grounded; one end of the resistor R104 is connected with the collector of the triode Q13, the other end of the resistor R104 is grounded through the capacitor C112, and the other end of the resistor R104 is also connected with the first input end of the switch circuit; one end of the resistor R107 is connected with the power supply end + VCC of the switching power supply circuit, and the other end of the resistor R107 is grounded through the capacitor C61 and the capacitor C111 in sequence; the cathode of the diode D10 is connected with the other end of the capacitor R104, the anode of the diode D10 is connected between the capacitor C61 and the capacitor C111, and the resistor R108 is connected in parallel with the diode D10; the cathode of the diode D3 is connected with the emitter of the triode Q13, the anode of the diode D3 is connected with the base of the triode Q13, the anode of the diode D3 is also connected with the collector of the triode Q14 sequentially through a resistor R97 and a capacitor C104, and a resistor R103 is connected with the diode D3 in parallel; the power supply end + VCC of the switching power supply circuit is grounded through a diode D9, a resistor R109, a resistor R102, a resistor R101 and a resistor R106 in sequence, and the collector of the triode Q14 is connected between the resistor R102 and the resistor R101; the emitter of the transistor Q13 is also connected between the resistor R109 and the resistor R102; the emitter of transistor Q13 is also coupled to a second input of the switching circuit.
3. The switching power supply energy efficiency control circuit according to claim 1 or 2, wherein the switching circuit comprises a resistor R92, a resistor R105, a capacitor C106, a voltage regulator ZD2, a transistor Q10, a transistor Q9, a resistor R111, a resistor R110, a photocoupler IC9, a resistor R114, a resistor R115, a resistor R99, a capacitor C39, a resistor R86, a transistor Q5, a transistor Q8, a resistor R112, a resistor R85, a voltage regulator ZD5, a transistor Q7 and a resistor R77; one end of a resistor R92 is connected with an emitter of the triode Q13, the other end of the resistor R92 is connected with the positive input end of a photoelectric coupler IC9 through a resistor R105, and the negative output end of the photoelectric coupler IC9 is connected with a resistor R92 through a voltage-regulator tube ZD 2; one end of the capacitor C106 is connected with the positive input end of the photoelectric coupler IC9, and the other end of the capacitor C106 is connected with the negative output end of the photoelectric coupler IC 9; an emitter of the triode Q10 is connected with a negative electrode output end of the photoelectric coupler IC9, a base electrode of the triode Q10 is connected with a collector of the triode Q9, a collector of the triode Q10 is connected with an emitter of the triode Q9 through a resistor R111, and a collector of the triode Q10 is grounded; the base of the transistor Q9 is grounded through a resistor R110; one end of the resistor R92 is used as the second input end of the switch circuit, and the base of the triode Q9 is used as the first input end of the switch circuit; the output end of the emitter of the photoelectric coupler IC9 is grounded through a resistor R115; the collector input end of the photoelectric coupler IC9 is connected with the base electrode of the triode Q8 through a resistor R114, the collector input end of the photoelectric coupler IC9 is further connected with the base electrode of the triode Q5 through the resistor R114, a resistor R99 and a resistor R112 in sequence, the emitter electrode of the triode Q5 is connected between the resistor R99 and the resistor R112, the collector electrode of the triode Q5 is connected with the base electrode of the triode Q8, and the emitter electrode of the triode Q8 is grounded; the base electrode of the triode Q8 is grounded through a resistor R86, and the collector electrode of the triode Q5 is grounded through a capacitor C39; the collector of the triode Q7 is connected with the emitter of the triode Q5 through a resistor R85, the emitter of the triode Q7 is grounded through a resistor R77, the base of the triode Q7 is grounded through a voltage regulator tube ZD5, and the base of the triode Q7 is also connected with the emitter of the triode Q5; the voltage output end VDD of the power supply circuit is connected with the collector of a triode Q7 through a resistor R113, and the emitter of a triode Q7 is connected with the power supply end VDD of the PWM controller.
4. The switching power supply energy efficiency control circuit according to claim 3, wherein the power supply circuit comprises a resistor R222, a resistor R123, a diode D40, a resistor R119, a resistor R120, a resistor R118, a capacitor C37 and a capacitor C36; the input end AC1 is connected with the resistor R113 sequentially through the resistor R22, the diode D40, the resistor R119 and the resistor R120, and the connection node of the resistor R120 and the resistor R113 is used as a voltage output end VDD of the power supply circuit; the input terminal AC1 is also connected between the resistor R222 and the diode D40 through the resistor R123; the resistor R120 is also grounded through a resistor R118, a capacitor C37 and a capacitor C36, respectively.
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| CN201310359686.9A CN103425071B (en) | 2013-08-16 | 2013-08-16 | Switching Power Supply energy efficiency control circuit |
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| CN201310359686.9A CN103425071B (en) | 2013-08-16 | 2013-08-16 | Switching Power Supply energy efficiency control circuit |
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| CN105449991B (en) * | 2015-12-21 | 2018-06-08 | 广东美的厨房电器制造有限公司 | Low-power dissipation standby device and electrical equipment |
| CN106300648B (en) * | 2016-10-21 | 2018-12-04 | 成都前锋电子仪器有限责任公司 | A kind of electric power management circuit |
| CN107456161B (en) * | 2017-08-25 | 2020-08-14 | 江苏美的清洁电器股份有限公司 | Dust collector and power supply control circuit for dust collector |
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|---|---|---|---|---|
| CN2694667Y (en) * | 2004-03-22 | 2005-04-20 | 深圳创维－Rgb电子有限公司 | Standby circuit and TV set containing the circuit |
| CN201414082Y (en) * | 2009-05-05 | 2010-02-24 | 冠捷投资有限公司 | Power supply |
| WO2009154985A3 (en) * | 2008-05-27 | 2010-03-18 | Asic Advantage, Inc. | Power supply with standby power |
| CN102780401A (en) * | 2012-07-25 | 2012-11-14 | 深圳市茂宏电气有限公司 | Intelligent control circuit and intelligent control method of switch power supply efficiency |
| CN203465544U (en) * | 2013-08-16 | 2014-03-05 | 深圳市茂宏电气有限公司 | Switch power supply energy efficiency control circuit |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2694667Y (en) * | 2004-03-22 | 2005-04-20 | 深圳创维－Rgb电子有限公司 | Standby circuit and TV set containing the circuit |
| WO2009154985A3 (en) * | 2008-05-27 | 2010-03-18 | Asic Advantage, Inc. | Power supply with standby power |
| CN201414082Y (en) * | 2009-05-05 | 2010-02-24 | 冠捷投资有限公司 | Power supply |
| CN102780401A (en) * | 2012-07-25 | 2012-11-14 | 深圳市茂宏电气有限公司 | Intelligent control circuit and intelligent control method of switch power supply efficiency |
| CN203465544U (en) * | 2013-08-16 | 2014-03-05 | 深圳市茂宏电气有限公司 | Switch power supply energy efficiency control circuit |
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