CN2822023Y - Medium and high power switch power with active power correcting circuit - Google Patents
Medium and high power switch power with active power correcting circuit Download PDFInfo
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- CN2822023Y CN2822023Y CN 200520086705 CN200520086705U CN2822023Y CN 2822023 Y CN2822023 Y CN 2822023Y CN 200520086705 CN200520086705 CN 200520086705 CN 200520086705 U CN200520086705 U CN 200520086705U CN 2822023 Y CN2822023 Y CN 2822023Y
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Abstract
The utility model discloses a medium and high power switch power with an active power correcting circuit, which comprises an EMI circuit, a rectification circuit, an active power correction PFC circuit, a DC/DC main power supply circuit, a power management CPU, a switch off device and a control circuit, wherein the DC/DC main power supply circuit is provided with the two-way output of a main power supply and an auxiliary power supply, an output end of the main power supply is provided with the switch off device and the switch off device can receive stand by control signals so as to cut off main power supply output. An output end of the auxiliary power supply is connected with the power management CPU which can generate stand by control signals with the trigger of stand by instruction. The stand by control signals can be transmitted to the switch off device so as to cut off the main power supply output, and the stand by control signals can also be transmitted to the PFC circuit via the control circuit so as to shut off the PFC circuit. With the PFC circuit switching off during stand by, the main power supply of the utility model can also accomplish low stand by power consumption; owing to no auxiliary power supplies, the utility model reduces product cost and increases system reliability.
Description
Technical field
The utility model relates to a kind of Switching Power Supply, particularly relate to a kind of have the source power correcting circuit in, high power switching power supply.
Background technology
Usually, in, high power switching power supply all needs power factor correction (PFC) circuit according to the requirement of present GB, to satisfy the harmonic current test request.Because currently used active PFC circuit itself has certain power consumption when working, particularly efficient is lower under low load condition, and the loss of power supply under underload or holding state of whole power supply own is bigger, makes stand-by power consumption substantially exceed the GB requirement.In order to solve the stand-by power consumption problem, general way is to introduce the independent standby accessory power supply of another one at present, turns off main power source when system standby, is only powered by the standby accessory power supply, therefore, prior art in, high power switching power supply all is to be made of main power source and standby power.Fig. 1 is the existing power system structure schematic block diagram that is made of standby power and main power source, circuit in the power-supply system includes two the tunnel, the first via by relay 11 ', EMI circuit 12 ', rectification circuit 13 ', pfc circuit 14 ', DC/DC main power circuit 15 ' constitute, this road is used to export main power source, i.e. required voltage when late-class circuit provides work is as providing voltage to power amplifier, host CPU, display unit etc.; Secondary route EMI circuit 22 ', rectification circuit 23 ', capacitor C 2 ', DC/DC standby power circuit 25 ' formation, this road is used to export standby power, i.e. required voltage when late-class circuit provides standby is as providing voltage etc. to power management CPU.When operate as normal, main power source and standby power all have voltage output, they provide voltage to separately late-class circuit respectively, when entering holding state, power management CPU will send a control signal give relay 11 ', make relay 11 ' shutoff, main power source stops level circuit supply backward, and then pfc circuit is not worked yet, at this moment, have only the second tunnel standby power level circuit supply backward, thereby realized low standby power loss.Yet, owing to introduced extra standby accessory power supply, promptly adopt two-way power supply, make that the cost of whole power supply increases, system is numerous and diverse, and cause the problem of aspects such as EMC, EMI easily.
The utility model content
The purpose of this utility model is to overcome the deficiency of prior art, provide a kind of have the source power correcting circuit in, high power switching power supply, turn-off pfc circuit during by standby, make main power source still can realize low standby power loss, exempted the setting of standby power, greatly reduced product cost, improved system reliability, and on circuit function, do not produce any negative effect, and increased competitiveness of product, have very strong practicality.
The technical scheme that its technical problem that solves the utility model adopts: a kind ofly have in the source power correcting circuit, high power switching power supply, it comprises: EMI circuit, a rectification circuit, an active power that is used to eliminate electromagnetic interference proofreaied and correct pfc circuit, a DC/DC main power circuit, a power management CPU, a switching off device, a control circuit;
The input of EMI circuit is connected to alternating current, the output of EMI circuit is connected to the input of rectification circuit, the output of rectification circuit is connected to the input of pfc circuit, the output of pfc circuit is connected to the input of DC/DC main power circuit, first output of DC/DC main power circuit is connected to switching off device, second output of DC/DC main power circuit is connected to power management CPU, the Opportunity awaiting control for linear signal output of power management CPU is connected to the control end of switching off device, the input of control circuit respectively, and the output of control circuit is connected to pfc circuit.
Described pfc circuit includes the PFC control IC, and the control signal output of control circuit is connected on the corresponding pin of PFC control IC.
The control signal output of described control circuit is connected on the VCC energization pins of PFC control IC, makes that closing pfc circuit work is realized by the power supply of turn-offing the PFC control IC.
The output of the control signal of described control circuit is connected on the FeedBack pin of PFC control IC, makes that closing pfc circuit work makes it enter guard mode by the defencive function of PFC control IC to realize.
The output of the control signal of described control circuit is connected on the Enable pin of PFC control IC, makes that closing pfc circuit work is connected to the Enable pin by control signal and the PFC control IC is quit work realize.
The input of described control circuit is connected on the Stand_by pin of power management CPU.
DC/DC main power circuit of the present utility model is provided with two road power supplys output, is main power source output by a road of first output output of main power circuit, is used to provide the required voltage of late-class circuit under the normal operating conditions; By a road of second output of main power circuit output is accessory power supply output, is used to be implemented in main power source and closes under the situation and export standby power; Be connected to switching off device behind the output of first via main power source, switching off device is accepted the Opportunity awaiting control for linear signal and is cut off main power source output; The accessory power supply output of DC/DC main power circuit is connected to power management CPU, power management CPU produces the Opportunity awaiting control for linear signal under the triggering of standby command, the Opportunity awaiting control for linear signal is given switching off device to cut off main power source output, the Opportunity awaiting control for linear signal is also given pfc circuit to close pfc circuit work by control circuit
During use, in normal operation, the alternating current that inserts becomes required direct voltage output successively after EMI circuit, rectification circuit, pfc circuit, DC/DC main power circuit are handled, wherein the output of DC/DC main power circuit is provided with the output of two road power supplys, the first via is main power source output, be used to provide the required voltage of late-class circuit under the normal operating conditions, as providing voltage to the power amplifier of late-class circuit, host CPU, display unit etc.; The second the tunnel is accessory power supply output, is used to be implemented in main power source and closes under the situation and export standby power, as providing voltage etc. to power management CPU; During operate as normal, above-mentioned two the tunnel all have power supply output, and the switching off device of this moment is in conducting state, and pfc circuit also in working order.When system entered standby, power management CPU produced the Opportunity awaiting control for linear signal under the triggering of standby command, and this Opportunity awaiting control for linear signal is given switching off device on the one hand, makes switching off device transfer off-state to, and the output of main power source is cut off; Simultaneously, the Opportunity awaiting control for linear signal is also given pfc circuit by control circuit, removes to close pfc circuit, and pfc circuit is not worked, electric weight by rectification circuit output is directly flowed to the DC/DC main power circuit, exports to corresponding late-class circuit by the auxiliary power output end of DC/DC main power circuit again.At this moment, because electric weight is without power factor correction, energy is only once processed, is almost 0 at the energy of pfc circuit loss, thereby makes stand-by power consumption obviously reduce, and has realized low standby power loss.
Of the present utility model a kind of have the source power correcting circuit in, high power switching power supply, be system after receiving standby signal, only turn-off pfc circuit, and, need not to introduce extra standby accessory power supply still by main switch power supply power supply.
Of the present utility model a kind of have the source power correcting circuit in, high power switching power supply, during work, its late-class circuit required voltage is still provided by main power source, during standby, disconnect main output of powering by standby signal control, standby voltage is provided only for the back level system, in addition by standby signal control pfc circuit, make pfc circuit when system standby, quit work, thereby realize low standby power loss.Like this, can under the situation that does not increase standby power, realize low standby power loss, make product have bigger competitive advantage.
The beneficial effects of the utility model are, owing to adopted EMI circuit, a rectification circuit, active power correction pfc circuit, a DC/DC main power circuit, a power management CPU, a switching off device, a control circuit that is used to eliminate electromagnetic interference to constitute Switching Power Supply; And the input of EMI circuit is connected to alternating current, the output of EMI circuit is connected to the input of rectification circuit, the output of rectification circuit is connected to the input of pfc circuit, the output of pfc circuit is connected to the input of DC/DC main power circuit, first output of DC/DC main power circuit is connected to switching off device, second output of DC/DC main power circuit is connected to power management CPU, the Opportunity awaiting control for linear signal output of power management CPU is connected to the control end of switching off device respectively, the input of control circuit, the output of control circuit is connected to pfc circuit, when standby, power management CPU produces the Opportunity awaiting control for linear signal under the triggering of standby command, the Opportunity awaiting control for linear signal is given switching off device to cut off main power source output, the Opportunity awaiting control for linear signal is also given pfc circuit to close pfc circuit work by control circuit, like this, turn-off pfc circuit during by standby, make main power source still can realize low standby power loss, therefore can in power-supply system, need not to be provided with standby power, can not produce any negative effect on the circuit function yet, thereby greatly reduced product cost, improved system reliability, and increasing competitiveness of product, have very strong practicality.
Description of drawings
Below in conjunction with drawings and Examples the utility model is described in further detail; But of the present utility model a kind of have the source power correcting circuit in, high power switching power supply is not limited to embodiment.
Fig. 1 is the existing power system structure schematic block diagram that is made of standby power and main power source;
Fig. 2 is a system configuration schematic block diagram of the present utility model;
Fig. 3 is the circuit system schematic diagram of existing band boost type PFC;
Fig. 4 is embodiment one circuit diagram of the present utility model;
Fig. 5 is embodiment two circuit diagrams of the present utility model;
Fig. 6 is embodiment three circuit diagrams of the present utility model.
Embodiment
Embodiment one, extremely shown in Figure 4 referring to Fig. 2, of the present utility model a kind of have the source power correcting circuit in, high power switching power supply, it comprises that an EMI circuit 11 that is used to eliminate electromagnetic interference, a rectification circuit 12, an active power proofread and correct pfc circuit 13, a DC/DC main power circuit 14, a power management CPU16, a switching off device 15, a control circuit 17;
The input of EMI circuit 11 is connected to alternating current, the output of EMI circuit 11 is connected to the input of rectification circuit 12, the output of rectification circuit 12 is connected to the input of pfc circuit 13, the output of pfc circuit 13 is connected to the input of DC/DC main power circuit 14, first output of DC/DC main power circuit 14 is connected to switching off device 15, second output of DC/DC main power circuit 14 is connected to power management CPU16, the Opportunity awaiting control for linear signal output of power management CPU16 is connected to the control end of switching off device 15, the input of control circuit 17 respectively, and the output of control circuit 17 is connected to pfc circuit 13.
Wherein, it is PFC control chip IC1 that pfc circuit includes the PFC control IC, and the control signal output of control circuit 17 is connected on the VCC energization pins of PFC control chip IC1, makes that closing pfc circuit 13 work is realized by the power supply of turn-offing the PFC control IC; The input of control circuit 17 is connected on the Stand_by pin of power management CPU16.
DC/DC main power circuit 14 of the present utility model is provided with two road power supplys output, is main power source output by a road of first output output of main power circuit, is used to provide the required voltage of late-class circuit under the normal operating conditions; By a road of second output of main power circuit output is accessory power supply output, is used to be implemented in main power source and closes under the situation and export standby power; Be connected to switching off device 15 behind the output of first via main power source, switching off device 15 is accepted the Opportunity awaiting control for linear signal and is cut off main power source output; The accessory power supply output of DC/DC main power circuit 14 is connected to power management CPU16, power management CPU16 produces the Opportunity awaiting control for linear signal under the triggering of standby command, the Opportunity awaiting control for linear signal is given switching off device 15 to cut off main power source output, the Opportunity awaiting control for linear signal is also given pfc circuit 13 to close pfc circuit work by control circuit 17
During use, in normal operation, the alternating current that inserts becomes required direct voltage output successively after EMI circuit 11, rectification circuit 12, pfc circuit 13, DC/DC main power circuit 14 are handled, wherein the output of DC/DC main power circuit 14 is provided with the output of two road power supplys, the first via is main power source output, be used to provide the required voltage of late-class circuit under the normal operating conditions, as providing voltage to the power amplifier of late-class circuit, host CPU, display unit etc.; The second the tunnel is accessory power supply output, is used to be implemented in main power source and closes under the situation and export standby power, as providing voltage etc. to power management CPU16; During operate as normal, above-mentioned two the tunnel all have power supply output, and the switching off device 15 of this moment is in conducting state, and pfc circuit 13 also in working order.When system entered standby, power management CPU16 produced the Opportunity awaiting control for linear signal under the triggering of standby command, and this Opportunity awaiting control for linear signal is given switching off device 15 on the one hand, makes switching off device 15 transfer off-state to, and the output of main power source is cut off; Simultaneously, the Opportunity awaiting control for linear signal is also given pfc circuit 13 by control circuit 17, remove to close pfc circuit 13, pfc circuit 13 is not worked, electric weight by rectification circuit 12 outputs is directly flowed to DC/DC main power circuit 14, exports to corresponding late-class circuit by the auxiliary power output end of DC/DC main power circuit 14 again.At this moment, because electric weight is without power factor correction, energy is only once processed, is almost 0 at the energy of pfc circuit 13 losses, thereby makes stand-by power consumption obviously reduce, and has realized low standby power loss.
Referring to shown in Figure 3, active PFC circuit 13 major parts of widespread usage all are to adopt the boost topological structure at present, pfc circuit 13 is by inductance L 1 in its circuit structure, diode D1, capacitor C 1, metal-oxide-semiconductor Q1, PFC control chip IC1 constitutes, one end of inductance L 1 is connected with the output cathode of rectification circuit, the other end of inductance L 1 is connected with the drain electrode of metal-oxide-semiconductor Q1, the source electrode of metal-oxide-semiconductor Q1 is connected to the output negative pole of rectification circuit, the grid of metal-oxide-semiconductor Q1 is connected with the output of PFC control chip IC1, the positive pole of diode D1 is connected the junction of inductance L 1 other end and metal-oxide-semiconductor Q1 drain electrode, the negative pole of diode D1 is connected with the positive pole of capacitor C 1, the negative pole of capacitor C 1 is connected with the output negative pole of rectification circuit, and capacitor C 1 just, negative pole as pfc circuit 13 just, cathode output end is connected with late-class circuit.
Fig. 4 is the circuit diagram that the PFC control circuit is turn-offed in adding of the present utility model, has promptly added control circuit 17 between pfc circuit 13 and power management CPU16, and it is to be realized by the power supply of turn-offing the PFC control IC that present embodiment is closed pfc circuit 13 work.
Embodiment two; referring to shown in Figure 5; of the present utility model a kind of have the source power correcting circuit in, high power switching power supply; be with the difference of embodiment one; the control signal output of control circuit 17 is connected on the FeedBack pin of PFC control IC; therefore, its to close pfc circuit 13 work be that defencive function by the PFC control IC makes it enter guard mode to realize.
Embodiment three, referring to shown in Figure 6, of the present utility model a kind of have the source power correcting circuit in, high power switching power supply, be with the difference of embodiment one, the control signal output of control circuit 17 is connected on the Enable pin of PFC control IC, therefore, it is closed pfc circuit work and is connected to the Enable pin by control signal and the PFC control IC is quit work realize.
Claims (6)
- One kind have the source power correcting circuit in, high power switching power supply, it is characterized in that: it comprises: an EMI circuit that is used to eliminate electromagnetic interference, a rectification circuit, an active power are proofreaied and correct pfc circuit, a DC/DC main power circuit, a power management CPU, a switching off device, a control circuit;The input of EMI circuit is connected to alternating current, the output of EMI circuit is connected to the input of rectification circuit, the output of rectification circuit is connected to the input of pfc circuit, the output of pfc circuit is connected to the input of DC/DC main power circuit, first output of DC/DC main power circuit is connected to switching off device, second output of DC/DC main power circuit is connected to power management CPU, the Opportunity awaiting control for linear signal output of power management CPU is connected to the control end of switching off device, the input of control circuit respectively, and the output of control circuit is connected to pfc circuit.
- 2. according to claim 1 a kind of have the source power correcting circuit in, high power switching power supply, it is characterized in that: described pfc circuit includes the PFC control IC, the output of the control signal of control circuit is connected on the corresponding pin of PFC control IC.
- 3. according to claim 2 a kind of have the source power correcting circuit in, high power switching power supply, it is characterized in that: the output of the control signal of described control circuit is connected on the VCC energization pins of PFC control IC.
- 4. according to claim 2 a kind of have the source power correcting circuit in, high power switching power supply, it is characterized in that: the output of the control signal of described control circuit is connected on the FeedBack pin of PFC control IC.
- 5. according to claim 2 a kind of have the source power correcting circuit in, high power switching power supply, it is characterized in that: the output of the control signal of described control circuit is connected on the Enable pin of PFC control IC.
- 6. according to claim 1 a kind of have the source power correcting circuit in, high power switching power supply, it is characterized in that: the input of described control circuit is connected on the Stand_by pin of power management CPU.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520086705 CN2822023Y (en) | 2005-08-31 | 2005-08-31 | Medium and high power switch power with active power correcting circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520086705 CN2822023Y (en) | 2005-08-31 | 2005-08-31 | Medium and high power switch power with active power correcting circuit |
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| Publication Number | Publication Date |
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| CN2822023Y true CN2822023Y (en) | 2006-09-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200520086705 Expired - Fee Related CN2822023Y (en) | 2005-08-31 | 2005-08-31 | Medium and high power switch power with active power correcting circuit |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102292903A (en) * | 2009-01-22 | 2011-12-21 | 飞宏美国股份有限公司 | Regulated power supply |
| CN102916573A (en) * | 2012-11-09 | 2013-02-06 | 福建捷联电子有限公司 | Vcc power supply voltage starting circuit of power factor corrector (PFC) and switching power supply applying Vcc power supply voltage starting circuit |
| CN105471247A (en) * | 2014-09-23 | 2016-04-06 | 深圳市瑞必达科技有限公司 | Low power consumption standby control circuit, large power switching power supply, and electrical equipment |
| CN105515362A (en) * | 2014-09-23 | 2016-04-20 | 深圳市瑞必达科技有限公司 | Ultra-low standby control circuit, power supply circuit and electric equipment |
| CN116997044A (en) * | 2023-09-28 | 2023-11-03 | 深圳莱福德科技股份有限公司 | Low-power consumption standby intelligent dimming control method |
-
2005
- 2005-08-31 CN CN 200520086705 patent/CN2822023Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102292903A (en) * | 2009-01-22 | 2011-12-21 | 飞宏美国股份有限公司 | Regulated power supply |
| CN102916573A (en) * | 2012-11-09 | 2013-02-06 | 福建捷联电子有限公司 | Vcc power supply voltage starting circuit of power factor corrector (PFC) and switching power supply applying Vcc power supply voltage starting circuit |
| CN105471247A (en) * | 2014-09-23 | 2016-04-06 | 深圳市瑞必达科技有限公司 | Low power consumption standby control circuit, large power switching power supply, and electrical equipment |
| CN105515362A (en) * | 2014-09-23 | 2016-04-20 | 深圳市瑞必达科技有限公司 | Ultra-low standby control circuit, power supply circuit and electric equipment |
| CN105515362B (en) * | 2014-09-23 | 2018-07-03 | 深圳市瑞必达科技有限公司 | A kind of ultralow readiness control circuit, power circuit and electrical equipment |
| CN116997044A (en) * | 2023-09-28 | 2023-11-03 | 深圳莱福德科技股份有限公司 | Low-power consumption standby intelligent dimming control method |
| CN116997044B (en) * | 2023-09-28 | 2023-12-15 | 深圳莱福德科技股份有限公司 | Low-power consumption standby intelligent dimming control method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: XIAMEN OVERSEAS CHINESE ELECTRONIC ENTERPRISE CO. Free format text: FORMER OWNER: HUAQIAO ELECTRONIC ENTERPRISE CO., LTD., XIAMEN Effective date: 20070119 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20070119 Address after: 361006 No. 22 Huli Avenue, Fujian, Xiamen Patentee after: Xiamen Overseas Chinese Electronic Co., Ltd. Address before: 361006 No. 22 Huli Avenue, Fujian, Xiamen Patentee before: Xiamen Huaqiao Electronic Enterprise Co., Ltd. |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060927 Termination date: 20110831 |