CN203406792U - Standby control module and power supply apparatus - Google Patents
Standby control module and power supply apparatus Download PDFInfo
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- CN203406792U CN203406792U CN201320310804.2U CN201320310804U CN203406792U CN 203406792 U CN203406792 U CN 203406792U CN 201320310804 U CN201320310804 U CN 201320310804U CN 203406792 U CN203406792 U CN 203406792U
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- power supply
- triode
- control chip
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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
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
The utility model discloses a standby control module. The standby control module comprises a work mode detection circuit which is connected with an output terminal of an auxiliary winding, used for supplying power for a power supply control chip, of a transformer of a power supply apparatus, and used for detecting a work mode at present of a device supplied by the power supply apparatus according to a voltage outputted from the output terminal of an auxiliary winding, used for supplying power for a power supply control chip, of a transformer of a power supply apparatus; and a primary feedback circuit which is connected with a voltage output terminal of the work mode detection circuit and a feedback input terminal of the power supply control chip, and used for feeding the value of a voltage back to the power supply control chip when the work mode at present of the device supplied by the power supply apparatus is a standby mode. The utility model further discloses a power supply apparatus. By adopting the scheme disclosed by the utility model, when the mode is a standby mode, a secondary feedback is changed into a primary feedback, power consumption required by the secondary feedback is reduced, and loss of a buffer circuit is also reduced, so as to meet the requirements of low power consumption when a wireless communication product is standby.
Description
Technical field
The utility model relates to supply unit technical field, specially refers to a kind of Opportunity awaiting control for linear module and supply unit.
Background technology
The large power supply of tradition single channel high voltage output, while being applied to system, stand-by power consumption can not meet the demands conventionally, and main cause is that conversion efficiency is low when underloading, and the conversion efficiency of AC-DC and DC-DC is all lower than 40%, and whole efficiency during standby is lower than 16%.For control the mainboard of power standby by master chip, when standby current cannot reduce, must in mainboard, increase MCU and control power standby, could meet low standby power loss requirement, still, this method not only can increase the production cost of mainboard, and the product that also needs wireless telecommunications when standby, because its standby current is large, even if therefore increase MCU, control power standby, still cannot meet the requirement of low standby power loss.
Utility model content
Main purpose of the present utility model, for a kind of Opportunity awaiting control for linear module and supply unit are provided, can meet the requirement of radio communication product low standby power loss, and can reduce production costs.
The utility model provides a kind of Opportunity awaiting control for linear module, this Opportunity awaiting control for linear module is connected between the transformer and power supply control chip of supply unit, and be arranged on the primary side of transformer, for the equipment of powering at supply unit, supply voltage is fed back to described power supply control chip when standby mode, described Opportunity awaiting control for linear module comprises:
Mode of operation testing circuit, be connected for the auxiliary winding output that power supply control chip is powered with the transformer of supply unit, for the voltage for the auxiliary winding output of power supply control chip power supply is exported according to described transformer, the work at present pattern of the equipment that detection supply unit is powered;
Elementary feedback circuit, be connected with the voltage output end of described mode of operation testing circuit and the feedback input end of described power supply control chip, while being standby mode for the work at present pattern of the equipment of powering at supply unit, feed back a magnitude of voltage to described power supply control chip.
Preferably, described mode of operation testing circuit comprises interconnective the first triode, the first electric capacity, the first resistance and the second resistance, wherein:
One end of described the first resistance connects the transformer of supply unit for the auxiliary winding output to power supply control chip power supply, the other end connects the positive pole of described the first electric capacity, the positive pole of the first electric capacity is also connected with the base stage of described the first triode, the minus earth of the first electric capacity; One end of described the second resistance is connected on the node between described the first resistance and the base stage of the first triode, the other end ground connection of the second resistance; The grounded emitter of described the first triode, the collector electrode of the first triode is connected as the voltage output end of mode of operation testing circuit and the voltage input end of described elementary feedback circuit.
Preferably, described mode of operation testing circuit also comprises switching tube and the 3rd resistance, wherein:
The transformer of the anodic bonding supply unit of described switching tube is for the auxiliary winding output to power supply control chip power supply, and the negative electrode of switching tube is connected the base stage of described the first triode through described the first resistance and the 3rd resistance.
Preferably, described elementary feedback circuit comprises the second triode and the 4th resistance, wherein:
The emitter of described the second triode is connected as the feedback output end of elementary feedback circuit and the feedback input end of described power supply control chip, the base stage of the second triode is connected with described the 4th resistance, and the collector electrode of the second triode connects the output of described transformer.
Preferably, described elementary feedback circuit comprises the 3rd triode, the 5th resistance, pull down resistor and voltage-stabiliser tube, wherein:
The base stage of described the 3rd triode is connected with the collector electrode of described the 3rd triode as the voltage input end of elementary feedback circuit, the base stage of the 3rd triode is also connected on the node between described the 5th resistance and pull down resistor, the collector electrode of the 3rd triode is connected as the feedback output end of elementary feedback circuit and the feedback input end of described power supply control chip, the grounded emitter of the 3rd triode; The other end of described the 5th resistance is connected to the anode of voltage-stabiliser tube, the other end ground connection of pull down resistor; The transformer that the negative electrode of described voltage-stabiliser tube connects supply unit is used for the auxiliary winding output of power supply control chip power supply and the node between the power pins of power supply control chip, and the anode of voltage-stabiliser tube is through described the 5th resistance and pull down resistor ground connection.
Preferably, described the first triode, the second triode and the 3rd triode are metal-oxide-semiconductor or voltage comparator exclusive disjunction amplifier.
The utility model also provides a kind of supply unit, comprise transformer and the power supply control chip being connected for the auxiliary winding output that power supply control chip is powered with transformer, and the optocoupler feedback circuit being connected with the elementary auxiliary winding of described transformer, also comprise Opportunity awaiting control for linear module, this Opportunity awaiting control for linear module is connected between the transformer and power supply control chip of supply unit, and be arranged on the primary side of transformer, for the equipment of powering at supply unit, supply voltage is fed back to described power supply control chip when standby mode, described Opportunity awaiting control for linear module comprises:
Mode of operation testing circuit, be connected for the auxiliary winding output that power supply control chip is powered with the transformer of supply unit, for the voltage for the auxiliary winding output of power supply control chip power supply is exported according to described transformer, the work at present pattern of the equipment that detection supply unit is powered;
Elementary feedback circuit, be connected with the voltage output end of described mode of operation testing circuit and the feedback input end of described power supply control chip, while being standby mode for the work at present pattern of the equipment of powering at supply unit, feed back a magnitude of voltage to described power supply control chip.
The utility model is by connecting an Opportunity awaiting control for linear module between the transformer at supply unit and power supply control chip, the work at present pattern of the equipment of powering by the mode of operation testing circuit detection supply unit of this Opportunity awaiting control for linear module, and when work at present pattern is standby mode, elementary feedback circuit by Opportunity awaiting control for linear module directly feeds back a low-voltage to power supply control chip, reduces the voltage of output with control transformer.And when mode of operation testing circuit detects work at present pattern and is normal mode of operation, the optocoupler feedback circuit by supply unit to power supply control chip, makes corresponding increase of voltage of transformer output by a larger Voltage Feedback of secondary feedback.When standby mode, change secondary feedback into elementary feedback, owing to having reduced the output voltage of supply unit, thereby reduced the loss of transformer secondary output end.In addition, adopt the mode of elementary feedback to feed back, make secondary feedback cut-off, also reduced the loss of secondary feedback, met the requirement of radio communication product low standby power loss, and reduced production cost.
Accompanying drawing explanation
Fig. 1 is that the utility model the first embodiment Opportunity awaiting control for linear module application is in the electrical block diagram of supply unit;
Fig. 2 is that the utility model the second embodiment Opportunity awaiting control for linear module application is in the electrical block diagram of supply unit;
Fig. 3 is the electrical block diagram of the utility model supply unit the first embodiment;
Fig. 4 is the electrical block diagram of the utility model supply unit the second embodiment.
The realization of the utility model object, functional characteristics and advantage, in connection with embodiment, are described further with reference to accompanying drawing.
Embodiment
Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.
The utility model provides a kind of Opportunity awaiting control for linear module, connect between the transformer and power supply control chip of supply unit, by this Opportunity awaiting control for linear module, the power of power supply output is detected, and when detecting equipment that this supply unit powers in standby mode, by Opportunity awaiting control for linear module, to power supply control chip, feed back, thereby the output voltage of power supply while triggering power supply control chip reduction standby, and then reduce loss.
With reference to Fig. 1, Fig. 1 is the electrical block diagram of the utility model Opportunity awaiting control for linear module the first embodiment.
The Opportunity awaiting control for linear module that the present embodiment provides, be connected between the transformer and power supply control chip of supply unit, and be arranged on the primary side of transformer, for the equipment of powering at supply unit, when standby mode, one supply voltage is fed back to power supply control chip, the voltage that reduces supply unit output to trigger power supply control chip, this Opportunity awaiting control for linear module comprises:
Mode of operation testing circuit 101, be connected for the auxiliary winding output that power supply control chip is powered with the transformer of supply unit, for the voltage for the auxiliary winding output of power supply control chip power supply is exported according to transformer, the work at present pattern of the equipment that detection supply unit is powered;
Mode of operation testing circuit 101 is connected to the transformer of supply unit for the auxiliary winding output to power supply control chip power supply, the supply voltage of receiving transformer for the auxiliary winding output of power supply control chip power supply is exported, and detect according to this supply voltage the residing work at present pattern of equipment that supply unit is powered, detect this equipment current in standby mode or normal mode of operation; And elementary feedback circuit 102 is connected with the voltage output end of mode of operation testing circuit 101 and the feedback input end of power supply control chip, when mode of operation testing circuit 101 detects equipment work at present pattern that supply unit powers and is standby mode, the voltage that the voltage output end of reception mode of operation testing circuit 101 is exported, and the above-mentioned magnitude of voltage of these elementary feedback circuit 102 outputs is fed back to power supply control chip.
In the present embodiment, in the first execution mode of mode of operation testing circuit 101, comprise interconnective the first triode 1011, the first electric capacity 1012, the first resistance 1013 and the second resistance 1014, wherein:
One end of the first resistance 1014 connects the transformer of supply unit for the auxiliary winding output to power supply control chip power supply, the other end connects the positive pole of the first electric capacity 1012, the positive pole of the first electric capacity 1012 is also connected with the base stage of the first triode 1011, the minus earth of the first electric capacity 1012; One end of the second resistance 1014 is connected on the node between the first resistance 1013 and the base stage of the first triode 1011, the other end ground connection of the second resistance 1014; The grounded emitter of the first triode 1011, the collector electrode of the first triode 1011 is connected as the voltage output end of mode of operation testing circuit and the voltage input end of elementary feedback circuit.In the present embodiment, the first triode 1012 can adopt metal-oxide-semiconductor, voltage comparator and operational amplifier etc.
In the present embodiment, in the second execution mode of mode of operation testing circuit 101, mode of operation testing circuit 101 also comprises switching tube 1015 and the 3rd resistance 1016, wherein:
The transformer of the anodic bonding supply unit of switching tube 1015 is for the auxiliary winding output to power supply control chip power supply, and the negative electrode of switching tube 1015 is connected the base stage of the first triode 1011 through the first resistance 1013 and the 3rd resistance 1016.
In the present embodiment, elementary feedback circuit 102 comprises the second triode 1021 and the 4th resistance 1022, wherein:
The emitter of the second triode 1021 is connected as the feedback output end of elementary feedback circuit 102 and the feedback input end of power supply control chip, the base stage of the second triode 1021 is connected with the 4th resistance 1022, and the collector electrode of the second triode 1021 is connected between the power pins of power supply control chip (V) and the auxiliary winding output of transformer.In addition, the collector electrode of this second triode 1021 and emitter are also connected to the opposite end of an optocoupler, and by this optocoupler, are coupled to a level that is arranged at transformer secondary output end and feed back.In the present embodiment, the second triode 1021 can adopt metal-oxide-semiconductor, voltage comparator and operational amplifier etc.
When the equipment of powering when transformer has just been switched to standby mode from normal mode of operation, transformer is exported a higher voltage during still according to normal mode of operation, and now because the needed voltage of standby mode is less, the duty cycle of switching of this transformer will reduce automatically, operating frequency hop cycle.Now, the voltage of described auxiliary winding output is also less, cause the voltage of integration on the first electric capacity 1012 lower, conventionally be less than 0.7V, like this, be just not enough to conducting the first triode 1011, the first triode 1011 cut-offs, and the base stage positively biased conducting of the second triode 1021, thereby the voltage of this elementary feedback circuit 102 is directly fed back to power supply control chip, adopt the mode of elementary feedback to feed back.Due to described the second triode 1021 conductings, corresponding optocoupler, by short circuit, makes secondary feedback cut-off.Now, power supply control chip receives the lower voltage feeding back under the effect of elementary feedback circuit, correspondence is dragged down to the voltage of this transformer output, thereby reduced the required power consumption of secondary feedback, also reduced the loss of the buffer circuit of transformer secondary output end simultaneously.
When the equipment of powering when transformer has just been switched to normal mode of operation from standby mode, transformer is exported a lower voltage during still according to standby mode, and now because the needed voltage of normal mode of operation is higher, the duty cycle of switching of this transformer will increase to export enough large power automatically, operating frequency is continuous, the voltage of integration on the first electric capacity 1012 increases, be greater than 0.7V, the first triode 1011 conductings, and the anti-cut-off partially of the second triode 1021, now, elementary feedback cut-off, change secondary feedback into, optocoupler feedback circuit by supply unit by the Voltage Feedback of secondary feedback to power supply control chip.Now, power supply control chip receives the higher voltage feeding back under the effect of secondary feedback circuit, correspondence is drawn high to the voltage of this transformer output, to meet the high-power demand of normal mode of operation.
The utility model is by connecting an Opportunity awaiting control for linear module between the transformer at supply unit and power supply control chip, the work at present pattern of the equipment of powering by the mode of operation testing circuit 101 detection supply units of this Opportunity awaiting control for linear module, and when work at present pattern is standby mode, elementary feedback circuit 102 by Opportunity awaiting control for linear module directly feeds back a low-voltage to power supply control chip, reduces the voltage of output with control transformer.And when mode of operation testing circuit 101 detects work at present pattern and is normal mode of operation, the optocoupler feedback circuit by supply unit to power supply control chip, makes corresponding increase of voltage of transformer output by a larger Voltage Feedback of secondary feedback.When standby mode, change secondary feedback into elementary feedback, owing to having reduced the output voltage of supply unit, thereby reduced the loss of transformer secondary output end.In addition, adopt the mode of elementary feedback to feed back, make secondary feedback cut-off, also reduced the loss of secondary feedback, met the requirement of radio communication product low standby power loss, and reduced production cost.
With reference to Fig. 2, Fig. 2 is the electrical block diagram of the utility model Opportunity awaiting control for linear module the second embodiment.
The difference of the utility model Opportunity awaiting control for linear module the second embodiment and the first embodiment, is that elementary feedback circuit 102 comprises the 3rd triode 1023, the 5th resistance 1024, pull down resistor 1025 and voltage-stabiliser tube 1026, wherein:
The base stage of the 3rd triode 1023 is connected with the collector electrode of the 3rd triode 1023, the base stage of the 3rd triode 1023 is also connected on the node between the 5th resistance 1024 and pull down resistor 1025, the collector electrode of the 3rd triode 1023 is connected with the feedback input end of power supply control chip (FB) as the feedback output end of elementary feedback circuit 102, the grounded emitter of the 3rd triode 1023; The other end of the 5th resistance 1024 is connected to the anode of voltage-stabiliser tube 1026, the other end ground connection of pull down resistor 1025; The negative electrode of voltage-stabiliser tube 1026 is connected on the auxiliary winding output and the node between the power pins of power supply control chip of transformer.In the present embodiment, the 3rd triode 1023 can adopt metal-oxide-semiconductor, voltage comparator and operational amplifier etc.; Voltage-stabiliser tube 1026 can be sampling voltage-stabiliser tube.
Operation principle in the present embodiment is similar to the operation principle in the first embodiment: when the equipment of this means of power transfers standby mode to, be accumulated in voltage on 1012 compared with little and cause 1011 cut-offs, and now the 3rd triode 1023 positively biased conductings, elementary feedback circuit 102 feeds back to power supply control chip by a low voltage, with control transformer, reduce the voltage of output, thereby reduce loss.When the work at present pattern of the equipment of powering when supply unit transfers normal mode of operation to, be accumulated in voltage on 1012 enough large and described in conducting 1011, correspondence makes the anti-cut-off partially of the 3rd triode 1023, now, secondary feedback circuit by the optocoupler feedback circuit by supply unit by the higher Voltage Feedback of electricity one to power supply control chip, with control transformer, increase the voltage of output, to meet the power demands of equipment.
The utility model also provides a kind of supply unit.
With reference to Fig. 3 and Fig. 4, Fig. 3 is the electrical block diagram of the utility model supply unit the first embodiment; Fig. 4 is the electrical block diagram of the utility model supply unit the second embodiment.
The supply unit that the present embodiment provides, comprise transformer 20 and the power supply control chip 30 being connected with transformer 20, and the optocoupler feedback circuit 40 that is arranged on the secondary end of transformer 20, supply unit also comprises above-mentioned Opportunity awaiting control for linear module 10, this Opportunity awaiting control for linear module 10 is connected between transformer 20 and power supply control chip 30, for the equipment in power-supply system power supply, feed back a lower magnitude of voltage during in standby mode to power supply control chip 30, to trigger power supply control chip 30, reduce the voltage of this supply units output; And when the equipment of power-supply system power supply is during in normal mode of operation, by the higher voltage of optocoupler feedback circuit 40 feedbacks one to power supply control chip 30, to trigger the raise voltage of this supply units output of power supply control chip 30.
This supply unit embodiment, has comprised whole technical schemes of the whole embodiment of above-mentioned Opportunity awaiting control for linear module, and the technique effect reaching is also identical, at this, does not repeat.
The foregoing is only preferred embodiment of the present utility model; not thereby limit the scope of the claims of the present utility model; every equivalent structure transformation that utilizes the utility model specification and accompanying drawing content to do; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present utility model.
Claims (7)
1. an Opportunity awaiting control for linear module, it is characterized in that, this Opportunity awaiting control for linear module is connected between the transformer and power supply control chip of supply unit, and be arranged on the primary side of transformer, for the equipment of powering at supply unit, supply voltage is fed back to described power supply control chip when standby mode, described Opportunity awaiting control for linear module comprises:
Mode of operation testing circuit, be connected for the auxiliary winding output that power supply control chip is powered with the transformer of supply unit, for the voltage for the auxiliary winding output of power supply control chip power supply is exported according to described transformer, the work at present pattern of the equipment that detection supply unit is powered;
Elementary feedback circuit, be connected with the voltage output end of described mode of operation testing circuit and the feedback input end of described power supply control chip, while being standby mode for the work at present pattern of the equipment of powering at supply unit, feed back a magnitude of voltage to described power supply control chip.
2. Opportunity awaiting control for linear module according to claim 1, is characterized in that, described mode of operation testing circuit comprises interconnective the first triode, the first electric capacity, the first resistance and the second resistance, wherein:
One end of described the first resistance connects the transformer of supply unit for the auxiliary winding output to power supply control chip power supply, the other end connects the positive pole of described the first electric capacity, the positive pole of the first electric capacity is also connected with the base stage of described the first triode, the minus earth of the first electric capacity; One end of described the second resistance is connected on the node between described the first resistance and the base stage of the first triode, the other end ground connection of the second resistance; The grounded emitter of described the first triode, the collector electrode of the first triode is connected as the voltage output end of mode of operation testing circuit and the voltage input end of described elementary feedback circuit.
3. Opportunity awaiting control for linear module according to claim 2, is characterized in that, described mode of operation testing circuit also comprises switching tube and the 3rd resistance, wherein:
The transformer of the anodic bonding supply unit of described switching tube is for the auxiliary winding output to power supply control chip power supply, and the negative electrode of switching tube is connected the base stage of described the first triode through described the first resistance and the 3rd resistance.
4. Opportunity awaiting control for linear module according to claim 3, is characterized in that, described elementary feedback circuit comprises the second triode and the 4th resistance, wherein:
The emitter of described the second triode is connected as the feedback output end of elementary feedback circuit and the feedback input end of described power supply control chip, the base stage of the second triode is connected with described the 4th resistance, and the collector electrode of the second triode connects the output of described transformer.
5. Opportunity awaiting control for linear module according to claim 3, is characterized in that, described elementary feedback circuit comprises the 3rd triode, the 5th resistance, pull down resistor and voltage-stabiliser tube, wherein:
The base stage of described the 3rd triode is connected with the collector electrode of described the 3rd triode as the voltage input end of elementary feedback circuit, the base stage of the 3rd triode is also connected on the node between described the 5th resistance and pull down resistor, the collector electrode of the 3rd triode is connected as the feedback output end of elementary feedback circuit and the feedback input end of described power supply control chip, the grounded emitter of the 3rd triode; The other end of described the 5th resistance is connected to the anode of voltage-stabiliser tube, the other end ground connection of pull down resistor; The transformer that the negative electrode of described voltage-stabiliser tube connects supply unit is used for the auxiliary winding output of power supply control chip power supply and the node between the power pins of power supply control chip, and the anode of voltage-stabiliser tube is through described the 5th resistance and pull down resistor ground connection.
6. according to the Opportunity awaiting control for linear module described in any one in claim 2 to 5, it is characterized in that, described the first triode, the second triode and the 3rd triode are metal-oxide-semiconductor or voltage comparator exclusive disjunction amplifier.
7. a supply unit, comprise transformer, the power supply control chip of transformer for the auxiliary winding output of power supply control chip power supply is connected, and the optocoupler feedback circuit being connected with the elementary auxiliary winding of described transformer, it is characterized in that, also comprise the Opportunity awaiting control for linear module as described in any one in claim 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320310804.2U CN203406792U (en) | 2013-05-31 | 2013-05-31 | Standby control module and power supply apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320310804.2U CN203406792U (en) | 2013-05-31 | 2013-05-31 | Standby control module and power supply apparatus |
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| Publication Number | Publication Date |
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| CN203406792U true CN203406792U (en) | 2014-01-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320310804.2U Expired - Fee Related CN203406792U (en) | 2013-05-31 | 2013-05-31 | Standby control module and power supply apparatus |
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| CN (1) | CN203406792U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105005214A (en) * | 2014-04-17 | 2015-10-28 | Lg电子株式会社 | Appliance and control method thereof |
| CN110198135A (en) * | 2018-02-23 | 2019-09-03 | 群光电能科技股份有限公司 | Load detecting circuit and the power supply unit with dual output power supply |
-
2013
- 2013-05-31 CN CN201320310804.2U patent/CN203406792U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105005214A (en) * | 2014-04-17 | 2015-10-28 | Lg电子株式会社 | Appliance and control method thereof |
| CN105005214B (en) * | 2014-04-17 | 2018-03-09 | Lg电子株式会社 | Electrical equipment and its operating method |
| CN110198135A (en) * | 2018-02-23 | 2019-09-03 | 群光电能科技股份有限公司 | Load detecting circuit and the power supply unit with dual output power supply |
| CN110198135B (en) * | 2018-02-23 | 2020-10-27 | 群光电能科技(苏州)有限公司 | Load detection circuit and power supply with double-output power supply |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140122 Termination date: 20210531 |