CN103887998A - Switch power source and switch power source integration circuit - Google Patents
Switch power source and switch power source integration circuit Download PDFInfo
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- CN103887998A CN103887998A CN201210558497.XA CN201210558497A CN103887998A CN 103887998 A CN103887998 A CN 103887998A CN 201210558497 A CN201210558497 A CN 201210558497A CN 103887998 A CN103887998 A CN 103887998A
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Abstract
The invention provides a switch power source integration circuit having a single-end detection alternating current zero crossing function. The switch power source integration circuit comprises a power switch module and a switch power source control module and further comprises a single-end alternating current zero crossing detection module, wherein the single-end alternating current zero crossing detection module comprises a zero crossing detection unit which is connected with an AC power source and a driving unit, the zero crossing detection unit generates a zero crossing detection signal after detecting a zero crossing point of the AC power source, the zero crossing detection unit comprises a detection end and an output end, the detection end of the zero crossing detection unit is connected with the AC power source, the driving unit comprises an input end and an output end, the input end of the driving unit is connected with the output end of the zero crossing detection unit, the driving unit receives the zero crossing detection signal, and the output end of the driving unit outputs a zero crossing driving signal. The invention further provides a switch power source. The switch power source integration circuit can reduce loss of zero crossing detection of the AC power source, is in consistent with the energy-saving standards and can accurately detect the zero crossing point of the switch power source having a half-wave rectification circuit.
Description
Technical field
The present invention relates to Switching Power Supply, relate in particular to a kind of switch power integrated circuit and Switching Power Supply with single-ended detection alternating current zero passage function.
Background technology
In household electrical appliances and electrical equipment control field, conventionally can extend in order to reduce the switching stress of relay the life-span of relay, adopt and only at the zero crossing of alternating current, relay is carried out to switch motion, the zero crossing that therefore detects alternating current is one of necessary Functional Design of circuit.In the tradition application that uses Industrial Frequency Transformer as power supply, can obtain easily the crossover point signal of alternating current from transformer secondary output.
But along with improving constantly of energy-conservation requirement, Switching Power Supply starts progressively to replace the main power supply source of Industrial Frequency Transformer as electrical equipment, now the primary side of power supply cannot direct-detection goes out the zero crossing information of alternating current, therefore needs to propose the new detection method at zero point.
Early stage in the application of Switching Power Supply, people generally use an optocoupler from alternating current wires, to be got zero signal and be delivered to secondary control circuit by optocoupler in the mode of isolation by a resistance pressure-dividing network series connection, but be limited to the sensitivity of optocoupler, make above-mentioned resistor voltage divider network produce great power consumption in the process detecting, generally can reach more than 0.4W, system complete machine stand-by power consumption is therefore all more than 0.5W.At present, countries in the world are all implemented new 0.5W stand-by energy-saving standard successively, use this kind of system and method cannot reach stand-by energy-saving standard if therefore continued.
Summary of the invention
The technical problem to be solved in the present invention is to overcome above-mentioned the problems of the prior art, and a kind of switch power integrated circuit and Switching Power Supply with single-ended detection alternating current zero passage function proposed, by the active detecting of zero crossing being carried out to the secondary circuit of control switch power supply, can effectively solve energy consumption too high, cannot meet the problems such as energy conservation standard.
For solving the problems of the technologies described above, the present invention proposes a kind of switch power integrated circuit with single-ended detection alternating current zero passage function, switch power integrated circuit comprises power switch module and Switching Power Supply control module, it also comprises single-ended alternating current zero passage detection module, single-ended alternating current zero passage detection module comprises: zero passage detection unit, zero passage detection unit connects AC power, zero passage detection unit inspection produces zero passage detection signal after the zero crossing of AC power, zero passage detection unit comprises test side and output, the test side of zero passage detection unit connects AC power, and driver element, comprising input and output, the input of driver element connects the output of zero passage detection unit, and driver element receives zero passage detection signal, and the output output zero passage of driver element drives signal.
Preferably, zero passage detection unit comprises zero-crossing comparator, one end ground connection of zero-crossing comparator or connect reference voltage, and the other end of zero-crossing comparator is the test side of zero passage detection unit, the output of zero-crossing comparator is the output of zero passage detection unit.
Preferably, driver element comprises triode or field effect transistor, the input that the base stage of triode or the grid of field effect transistor are driver element, the output that the collector electrode of triode or the drain electrode of field effect transistor are driver element, the emitter of triode or the source ground of field effect transistor.
Preferably, the encapsulation of switch power integrated circuit comprises that alternating current detects pin and zero cross signal output pin, the test side of zero cross signal is that the alternating current of switch power integrated circuit detects pin, the zero cross signal output pin that the output of driver element is switch power integrated circuit.
Preferably, the packing forms of switch power integrated circuit is DIP8 or SOP8.
Preferably, power switch module is triode or metal-oxide-semiconductor.
Preferably, the withstand voltage scope of power switch module is 200V-1000V.
The present invention also proposes a kind of Switching Power Supply, comprise optical coupler, half-wave rectifying circuit, the first resistance, transformer and the switch power integrated circuit with single-ended detection alternating current zero passage function as above, half-wave rectifying circuit comprises diode, optical coupler comprises two inputs, and switch power integrated circuit also comprises circuit supply pin; The first resistance is connected to the anode of diode and the alternating current of switch power integrated circuit detects between pin, the zero cross signal output pin of switch power integrated circuit connects an input of optical coupler, circuit supply pin connects external power source, another input of optical coupler connects external power source, the anodic bonding AC power of diode, one end of the negative electrode connection transformer of diode, the other end of power switch module connection transformer.
Compared with prior art, beneficial effect of the present invention comprises: switch power integrated circuit and the Switching Power Supply with single-ended detection alternating current zero passage function of the present invention, by zero passage detection unit and driver element are integrated in circuit, can real-time synchronization control optical coupler, thereby be reduced in the power loss in zero passage detection, meet stand-by energy-saving standard, can accurately measure the zero crossing of the Switching Power Supply with half-wave rectifying circuit.
Accompanying drawing explanation
Fig. 1 is the circuit structure diagram of the preferred embodiment of Switching Power Supply of the present invention.
Fig. 2 is the schematic diagram of the switch power integrated circuit in Fig. 1.
Fig. 3 is the circuit structure diagram of another preferred embodiment of Switching Power Supply of the present invention.
Fig. 4 is the schematic diagram of the switch power integrated circuit in Fig. 3.
Wherein, description of reference numerals is as follows: the single-ended alternating current zero passage detection of the switch power integrated circuit 1 module 11 zero passage detection unit 111 driver element 112 power switch module 12 Switching Power Supply control module 13 optical coupler IC1 first resistance R 1 absorption circuit RDC half-wave rectifying circuit 2 diode D1 reference power source VERF transformer T with single-ended detection alternating current zero passage function.
Embodiment
In order to further illustrate principle of the present invention and structure, existing by reference to the accompanying drawings to a preferred embodiment of the present invention will be described in detail.
Refer to Fig. 1 to Fig. 4, a kind of switch power integrated circuit 1 with single-ended detection alternating current zero passage function of the present invention, it comprises: single-ended alternating current zero passage detection module 11, power switch module 12 and Switching Power Supply control module 13.The function that general switch power integrated circuit does not all have grid alternating current zero crossing to detect, and the present invention integrated this function, and do not need extra components and parts.
Single-ended alternating current zero passage detection module 11 comprises zero passage detection unit 111 and driver element 112.Zero passage detection unit 111 connects AC power, and driver element 112 connects zero passage detection unit 111.Zero passage detection unit 111 produces zero passage detection signal after the zero crossing of AC power being detected, and driver element 112 receives zero passage detection signal, and driver element 112 is exported zero passage and driven signal.
Zero passage detection unit 111 comprises test side and output.Refer to Fig. 2, in the present embodiment, zero passage detection unit 111 comprises zero-crossing comparator, the in-phase end ground connection of zero-crossing comparator, the out-phase end of zero-crossing comparator is the test side of zero passage detection unit 111, and the output of zero-crossing comparator is the output of zero passage detection unit 111.
Refer to Fig. 3, in other embodiments, zero passage detection unit 111 comprises zero-crossing comparator, the homophase termination reference power source VERF of zero-crossing comparator, the out-phase end of zero-crossing comparator is the test side of zero passage detection unit 111, and the output of zero-crossing comparator is the output of zero passage detection unit 111.This reference power source VERF can arrange according to the demand of secondary control circuit.If the out-phase termination reference power source VERF of this zero-crossing comparator, this zero passage detection unit 111 has had the size detection function of alternating current.Be specially; the operating voltage range of secondary control circuit is set by this reference power source VERF; in the time detecting in the operating voltage range that the size of the alternating current that flows through the first resistance R 1 is not being set; do not export zero passage detection signal, implement functions such as overvoltage protection, under-voltage protection or switch control thereby secondary control circuit can obtain the size parameter of alternating current indirectly.
Please continue to refer to Fig. 2 and Fig. 3, driver element 112 comprises input and output.In the present embodiment, driver element 112 comprises triode, and the base stage of triode is the input of this driver element 112, and the current collection of triode is the output of this driver element 112 very, the grounded emitter of triode.Because zero cross signal is smaller, zero cross signal can be amplified to the scope that can drive optical coupler IC1 work by triode, thereby makes optical coupler IC1 work.In other embodiments, driver element 112 comprises field effect transistor, the input that the grid of field effect transistor is driver element, the output that the drain electrode of field effect transistor is driver element, the source ground of field effect transistor.
Refer to Fig. 4, switch power integrated circuit 1 is by integrated power switch module 12, Switching Power Supply control module 13 and have single-ended alternating current zero passage detection module 11, so just no longer need extra components and parts, and there is few peripheral quantity, integrated cost is reduced.
In the present embodiment, this switch power integrated circuit 1 be encapsulated as DIP8 or SOP8.The pin two of this switch power integrated circuit 1 is that alternating current detects pin, pin 3 for switch power integrated circuit 1 is with reference to grounding pin, pin 4 is switch power integrated circuit 1 energization pins, pin 5 is zero cross signal output pin, and pin 7 and pin 8 are power switch module 12 pins.It is two test sides of zero passage detection unit 111 that alternating current detects pin, and signal output pin is the output of driver element 112.This switch power integrated circuit 1 need to pin number and Pin locations can set according to actual conditions, be not limited to the situation of the present embodiment.Refer to Fig. 4, also can adopt the encapsulation of only having 5 pins, because pin 7 and pin 8 connect together, therefore, as long as 5 pins just can enough have been realized the function of the present embodiment.
In the present embodiment, Switching Power Supply control module 13 is PWM(pulse-width modulation circuit), PFM(pulse frequency modulation circuit) or PSM(pulse number modulation circuit).The voltage tolerance range of power switch module 12 is 200V-1000V.Power switch module 12 is triode or metal-oxide-semiconductor.
Please continue to refer to Fig. 1 and Fig. 4, the present invention also proposes a kind of Switching Power Supply, Switching Power Supply is applied to electric power system, it comprises optical coupler IC1, half-wave rectifying circuit 2, the first resistance R 1, transformer T and switch power integrated circuit as above 1, half-wave rectifying circuit 2 comprises diode D1, and optical coupler IC1 comprises two inputs.The first resistance R 1 is connected to the anode of diode D1 and the alternating current of switch power integrated circuit 1 detects between pin, and the zero cross signal output pin of switch power integrated circuit 1 connects an input of optical coupler IC1.Switch power integrated circuit 1 also comprises circuit supply pin, and circuit supply pin connects external power source, and the other end of optical coupler IC1 connects external power source.The anodic bonding AC power of diode D1, one end of the negative electrode connection transformer T of diode D1, the other end of power switch module 12 connection transformer T, absorption circuit RDC is in parallel with transformer T.
As we can see from the figure, the power supply of optical coupler IC1 also can be passed through the external power source of switch power integrated circuit 1, without extra power supply.The power supply that is indebted to our switch power integrated circuit 1 generally only has 5-10V left and right, therefore have up to the electric current of 5mA and carry out optocoupler driving, thereby reduce the sensitivity requirement of optocoupler, optical coupler IC1 can be activated sooner, reduced the start-up time of optical coupler IC1.And maximum loss power is only below 5mW, reduce more than 10 times than traditional method, save the energy.
Describe operation principle of the present invention in detail below in conjunction with Fig. 1 to Fig. 4.
The crossover point signal of alternating current enters into control switch power IC 1 inside through the first resistance R 1, after the processing and analysis of zero passage detecting unit 111, produces zero passage detection signal.If zero passage detection unit 111 connects reference power source VERF, whether detect the size of current that flows through the first resistance R 1 arranging in scope, if it is this zero passage detection signal is sent to this driver element 112, otherwise does not transmit; If zero passage detection unit 111 ground connection, detect zero crossing, just zero cross signal is sent to driver element 112.If driver element 112 receives zero cross signal, with regard to output drive signal, and carry out Synchronization Control to being connected to outside optical coupler IC1.Zero crossing detection signal through optical coupler IC1 with isolation method be delivered to secondary after, the control work that can implement to be correlated with, can accurately measure the zero crossing of the Switching Power Supply with half-wave rectifying circuit.
Compared with prior art, adopt switch power integrated circuit and the Switching Power Supply with single-ended detection alternating current zero passage function of the present invention, by zero passage detection unit and driver element are integrated in circuit, do not need extra components and parts, reduce production cost, and due to analysis zero-crossing of alternating current that can be initiatively, do not need extra relatively high power consumption to get final product real-time output AC signal to secondary control circuit, complete machine stand-by power consumption can be easily controlled at below 0.5W, even below 0.3W, meet present stand-by energy-saving standard, simultaneously, because reduced the sensitivity requirement of optical coupler, improve toggle speed.
The foregoing is only better possible embodiments of the present invention, not limit the scope of the invention.The equivalent structure that all utilizations specification of the present invention and accompanying drawing content have been done changes, and is all included in protection scope of the present invention.
Claims (8)
1. one kind has the switch power integrated circuit of single-ended detection alternating current zero passage function, described switch power integrated circuit comprises power switch module and Switching Power Supply control module, it is characterized in that, it also comprises single-ended alternating current zero passage detection module, and described single-ended alternating current zero passage detection module comprises:
Zero passage detection unit, described zero passage detection unit connects AC power, described zero passage detection unit inspection produces zero passage detection signal after the zero crossing of described AC power, described zero passage detection unit comprises test side and output, and the test side of described zero passage detection unit connects described AC power; And
Driver element, comprises input and output, and the input of described driver element connects the output of described zero passage detection unit, and described driver element receives described zero passage detection signal, and the output output zero passage of described driver element drives signal.
2. switch power integrated circuit as claimed in claim 1, it is characterized in that, described zero passage detection unit comprises zero-crossing comparator, one end ground connection of described zero-crossing comparator or connect reference voltage, the other end of described zero-crossing comparator is the test side of described zero passage detection unit, and the output of described zero-crossing comparator is the output of described zero passage detection unit.
3. switch power integrated circuit as claimed in claim 1, it is characterized in that, described driver element comprises triode or field effect transistor, the input that the base stage of described triode or the grid of field effect transistor are described driver element, the output that the collector electrode of described triode or the drain electrode of field effect transistor are described driver element, the emitter of described triode or the source ground of field effect transistor.
4. switch power integrated circuit as claimed in claim 1, it is characterized in that, the encapsulation of described switch power integrated circuit comprises that alternating current detects pin and zero cross signal output pin, the test side of described zero cross signal is that the alternating current of described switch power integrated circuit detects pin, the zero cross signal output pin that the output of described driver element is described switch power integrated circuit.
5. switch power integrated circuit as claimed in claim 4, is characterized in that, the packing forms of described switch power integrated circuit is DIP8 or SOP8.
6. switch power integrated circuit as claimed in claim 1, is characterized in that, described power switch module is triode or metal-oxide-semiconductor.
7. switch power integrated circuit as claimed in claim 6, is characterized in that, the withstand voltage scope of described power switch module is 200V-1000V.
8. a Switching Power Supply, it is characterized in that, comprise optical coupler, half-wave rectifying circuit, the first resistance, transformer and the switch power integrated circuit with single-ended detection alternating current zero passage function as described in claim 1 to 7 any one, described half-wave rectifying circuit comprises diode, described optical coupler comprises two inputs, and described switch power integrated circuit also comprises circuit supply pin;
Described the first resistance is connected to the anode of described diode and the alternating current of described switch power integrated circuit detects between pin, the zero cross signal output pin of described switch power integrated circuit connects an input of described optical coupler, described circuit supply pin connects external power source, another input of described optical coupler connects described external power source, AC power described in the anodic bonding of described diode, the negative electrode of described diode connects one end of described transformer, and described power switch module connects the other end of described transformer.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210558497.XA CN103887998A (en) | 2012-12-20 | 2012-12-20 | Switch power source and switch power source integration circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210558497.XA CN103887998A (en) | 2012-12-20 | 2012-12-20 | Switch power source and switch power source integration circuit |
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| CN103887998A true CN103887998A (en) | 2014-06-25 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112305416A (en) * | 2020-10-26 | 2021-02-02 | 深圳市信锐网科技术有限公司 | Zero calibration circuit, equipment, system, method, device and storage medium |
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| US20050067981A1 (en) * | 2003-09-30 | 2005-03-31 | International Rectifier Corporation | Simplified topology for HID lamps |
| US20110194312A1 (en) * | 2010-02-09 | 2011-08-11 | Power Integrations, Inc. | Method and apparatus for determining zero-crossing of an ac input voltage to a power supply |
| CN102385000A (en) * | 2010-08-27 | 2012-03-21 | 深圳长城开发科技股份有限公司 | Zero crossing detection circuit of electric meter system |
| CN203104293U (en) * | 2012-12-20 | 2013-07-31 | 深圳市力生美半导体器件有限公司 | Switching power supply and switching power supply integrated circuit |
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2012
- 2012-12-20 CN CN201210558497.XA patent/CN103887998A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050067981A1 (en) * | 2003-09-30 | 2005-03-31 | International Rectifier Corporation | Simplified topology for HID lamps |
| US20110194312A1 (en) * | 2010-02-09 | 2011-08-11 | Power Integrations, Inc. | Method and apparatus for determining zero-crossing of an ac input voltage to a power supply |
| CN102385000A (en) * | 2010-08-27 | 2012-03-21 | 深圳长城开发科技股份有限公司 | Zero crossing detection circuit of electric meter system |
| CN203104293U (en) * | 2012-12-20 | 2013-07-31 | 深圳市力生美半导体器件有限公司 | Switching power supply and switching power supply integrated circuit |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112305416A (en) * | 2020-10-26 | 2021-02-02 | 深圳市信锐网科技术有限公司 | Zero calibration circuit, equipment, system, method, device and storage medium |
| CN112305416B (en) * | 2020-10-26 | 2024-07-05 | 深圳市信锐网科技术有限公司 | Zero calibration circuit, zero calibration equipment, zero calibration system, zero calibration method, zero calibration device and zero calibration storage medium |
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Address after: 518000, Shenzhen, Guangdong, Shenzhen, Nanshan District science and technology road, No. 1, SED science and technology building on the south side of the 10 floor, east block A Applicant after: SHENZHEN LII SEMICONDUCTOR CO., LTD. Address before: Longgang District of Shenzhen city in Guangdong province 518000 Gang Street Baolong community Jinlong Avenue No. 2 JINGDING Building No. 1 201~202 science and technology industrial plant Applicant before: Shenzhen Lishengmei Semiconductor Deveces Co., Ltd. |
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Application publication date: 20140625 |
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