CN103887978A - 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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- CN103887978A CN103887978A CN201210558544.0A CN201210558544A CN103887978A CN 103887978 A CN103887978 A CN 103887978A CN 201210558544 A CN201210558544 A CN 201210558544A CN 103887978 A CN103887978 A CN 103887978A
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Abstract
The invention provides a switch power source integration circuit having a double-end detection AC 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 double-end AC zero crossing detection module, wherein the double-end AC zero crossing detection module comprises a zero crossing detection unit and a driving unit, the zero crossing detection unit is connected with an AC power source, the zero crossing detection unit detects a zero crossing point of the AC power source and generates a zero crossing detection signal, the driving unit is connected with the zero crossing detection unit, the driving unit receives the zero crossing detection signal, and the driving unit outputs a zero crossing driving signal. The switch power source integration circuit further provides a switch power source. The switch power source integration circuit can reduces zero crossing detection loss of the AC power source, is in consistent with the energy-saving standards and can further realize zero crossing detection on a full wave rectifier 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 both-end 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.
Although use an alternating current detection terminal can complete the detection of zero crossing in integrated circuit, but still there is larger use limitation, be limited to the impact of input rectification circuit, the detection mode of single terminal can only be operated in the application of halfwave rectifier, in the time being input as full-wave rectification or bridge rectifier, cannot accurately obtain the signal of zero-crossing of alternating current with respect to the reference ground of control switch power IC.
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 that has both-end and detect 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, and can solve the problem that cannot realize to full-wave rectifying circuit zero passage detection.
For solving the problems of the technologies described above, the present invention proposes a kind of switch power integrated circuit with both-end detection alternating current zero passage function, switch power integrated circuit comprises power switch module and Switching Power Supply control module, it also comprises both-end alternating current zero passage detection module, both-end alternating current zero passage detection module comprises: zero passage detection unit, zero passage detection unit connects AC power, the zero crossing of zero passage detection unit inspection AC power also produces zero passage detection signal, zero passage detection unit comprises two test sides and output, a test side of zero passage detection unit connects one end of AC power, another test side of zero passage detection unit connects the other end of 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 differential comparator, the in-phase end of differential comparator is a test side of zero passage detection unit, and the out-phase end of differential comparator is another test side of zero passage detection unit, and the output of differential 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 two alternating currents detect pin and zero cross signal output pin, two test sides of zero cross signal are that two alternating currents of switch power integrated circuit switch power integrated circuit detect pin, and the output of driver element is the zero cross signal output pin of switch power integrated circuit 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, Switching Power Supply is applied to electric power system, comprise optical coupler, full-wave rectifying circuit, the first electric capacity, the first resistance, the second resistance, transformer and the switch power integrated circuit with both-end detection alternating current zero passage function as above, full-wave rectifying circuit comprises the rectifier bridge being made up of four diodes, optical coupler comprises two inputs, and switch power integrated circuit also comprises circuit supply pin; The first resistance is connected to one end of AC power and one of them alternating current of switch power integrated circuit detects between pin, the second resistance is connected to the other end of AC power and another 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, rectifier bridge is connected between AC power and transformer, rectifier bridge the first electric capacity in parallel, 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 both-end detection alternating current zero passage function of the present invention, by both-end alternating current zero passage detection module integration in circuit, can real-time synchronization control optical coupler, thereby the power loss in reduction zero passage detection, meet stand-by energy-saving standard, and adopt the zero passage detection unit of both-end, can accurately measure the zero crossing of the Switching Power Supply while thering is full-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 another circuit structure diagram in the preferred enforcement of Switching Power Supply of the present invention.
Wherein, description of reference numerals is as follows: the switch power integrated circuit 1 both-end alternating current zero passage detection module 11 zero passage detection unit 111 driver element 112 power switch module 12 Switching Power Supply control module 13 absorption circuit RDC full-wave rectifying circuit 2 optical coupler IC1 first resistance R 1 second resistance R 2 transformer T with both-end 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. 3, a kind of switch power integrated circuit 1 with both-end detection alternating current zero passage function of the present invention, it comprises: both-end 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.
Both-end 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.
Please continue to refer to Fig. 1 to Fig. 3, zero passage detection unit 111 comprises two test sides and output.A test side of zero passage detection unit 111 connects one end of AC power, and another test side of zero passage detection unit 111 connects the other end of AC power, and the output of zero passage detection unit 111 connects driver element 112.In the present embodiment, zero passage detection unit 111 is differential comparator, and the in-phase end of differential comparator connects one end of AC power, and the out-phase end of differential comparator connects the other end of AC power.Two test sides of zero passage detection unit 111 have all been connected on one side of full-wave rectifying circuit 2, avoid like this situation that does not detect the zero crossing in full-wave rectifying circuit 2 to occur.If because two test sides are in same one end, or all connect one end of electric capacity at full-wave rectifying circuit 2, zero cross signal is filtered through the rectified action meeting of full-wave rectification electric current 2, cannot realize detection.
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, the input of this driver element 112 of the base stage of triode, 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 of the drain drives unit of field effect transistor, the source ground of field effect transistor.
Refer to Fig. 3, switch power integrated circuit 1 is by integrated power switch module 12, Switching Power Supply control module 13 and has both-end 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 one of this switch power integrated circuit 1 and pin two are 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. 3, also can adopt the encapsulation of only having 6 pins, because pin 7 and pin 8 connect together, therefore, as long as 6 pins just can enough have been realized the function of the present embodiment.
In the present embodiment, switching power source control circuit 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.
Refer to Fig. 1 to Fig. 3, the present invention also proposes a kind of Switching Power Supply, comprises optical coupler IC1, full-wave rectifying circuit 2, the first electric capacity, the first resistance R 1, the second resistance R 2, transformer T, absorption circuit RDC and switch power integrated circuit as above 1.Full-wave rectifying circuit 2 comprises the rectifier bridge being made up of four diodes, and optical coupler IC1 comprises two inputs, and switch power integrated circuit 1 also comprises circuit supply pin.
The first resistance R 1 is connected to an end line of AC power and one of them alternating current of switch power integrated circuit 1 detects between pin, the second resistance R 2 is connected to the other end of AC power and another alternating current of switch power integrated circuit 1 detects between pin, the zero cross signal output pin of switch power integrated circuit 1 connects an input of optical coupler IC1, circuit supply pin connects external power source, the other end of optical coupler IC1 connects external power source, rectifier bridge is connected between AC power and transformer T, rectifier bridge the first electric capacity in parallel, absorption circuit RDC is in parallel with transformer T, power switch module 12 connection 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 mains switch power IC 1 generally only has 5-10V left and right, thereby therefore there is the sensitivity requirement of carrying out optocoupler driving reduction optocoupler up to the electric current of 5mA, optical coupler IC1 can be activated sooner, reduce 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 and Fig. 3.
The crossover point signal of alternating current enters into switch power integrated circuit 1 inside through the first resistance R 1 and the second resistance R 2, after the processing and analysis of zero passage detecting unit 111, produces zero passage detection signal.If driver element 112 receives zero passage detection 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.
Compared with prior art, adopt switch power integrated circuit and the Switching Power Supply with both-end detection alternating current zero passage function of the present invention, by both-end alternating current zero passage detection module integration 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, can realize the detection at the zero cross signal of full-wave rectifying circuit, also reduce 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 both-end 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 both-end alternating current zero passage detection module, and described both-end alternating current zero passage detection module comprises:
Zero passage detection unit, described zero passage detection unit connects AC power, the zero crossing of AC power produce zero passage detection signal described in described zero passage detection unit inspection, described zero passage detection unit comprises two test sides and output, a test side of described zero passage detection unit connects one end of described AC power, and another test side of described zero passage detection unit connects the other end of 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 of described driver element is exported described zero passage and driven signal.
2. switch power integrated circuit as claimed in claim 1, it is characterized in that, described zero passage detection unit comprises differential comparator, the in-phase end of described differential comparator is a test side of described zero passage detection unit, the out-phase end of described differential comparator is another test side of described zero passage detection unit, and the output of described differential 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 two alternating currents detect pin and zero cross signal output pin, two test sides of described zero cross signal are that two alternating currents of described switch power integrated circuit switch power integrated circuit detect pin, and the output of described driver element is the zero cross signal output pin of described switch power integrated circuit 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, described Switching Power Supply is applied to electric power system, it is characterized in that, comprise optical coupler, full-wave rectifying circuit, the first electric capacity, the first resistance, the second resistance, transformer and the switch power integrated circuit with both-end detection alternating current zero passage function as described in claim 1 to 7 any one, described full-wave rectifying circuit comprises the rectifier bridge being made up of four diodes, described optical coupler comprises two inputs, and described switch power integrated circuit also comprises circuit supply pin;
Described the first resistance is connected to one end of described AC power and one of them alternating current of described switch power integrated circuit detects between pin, described the second resistance is connected to the other end of described AC power and another 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, described rectifier bridge is connected between described AC power and transformer, described rectifier bridge described the first electric capacity in parallel, described power switch module connects described transformer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210558544.0A CN103887978A (en) | 2012-12-20 | 2012-12-20 | Switch power source and switch power source integration circuit |
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| CN201210558544.0A CN103887978A (en) | 2012-12-20 | 2012-12-20 | Switch power source and switch power source integration circuit |
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| CN103887978A true CN103887978A (en) | 2014-06-25 |
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| CN201210558544.0A Pending CN103887978A (en) | 2012-12-20 | 2012-12-20 | Switch power source and switch power source integration circuit |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106771530A (en) * | 2016-12-21 | 2017-05-31 | 广东志高暖通设备股份有限公司 | A kind of power zero-crossing detection circuit, device and blower fan |
| WO2018152729A1 (en) * | 2017-02-23 | 2018-08-30 | 路晟（上海）科技有限公司 | Coupling voltage transforming system |
| WO2018205370A1 (en) * | 2017-05-12 | 2018-11-15 | 厦门赛特勒磁电有限公司 | Power conversion module |
| WO2021168831A1 (en) * | 2020-02-28 | 2021-09-02 | Astec International Limited | Power measurements in switched mode power supplies |
| CN114184830A (en) * | 2021-11-01 | 2022-03-15 | 杭州涂鸦信息技术有限公司 | Zero-crossing detection circuit and electronic equipment |
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| CN102193026A (en) * | 2010-01-27 | 2011-09-21 | Ls产电株式会社 | Device and method for processing input data of protective relay |
| CN203104318U (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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| CN201260129Y (en) * | 2008-08-29 | 2009-06-17 | 广东志高空调有限公司 | Power factor corrector |
| CN102193026A (en) * | 2010-01-27 | 2011-09-21 | Ls产电株式会社 | Device and method for processing input data of protective relay |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106771530A (en) * | 2016-12-21 | 2017-05-31 | 广东志高暖通设备股份有限公司 | A kind of power zero-crossing detection circuit, device and blower fan |
| WO2018152729A1 (en) * | 2017-02-23 | 2018-08-30 | 路晟（上海）科技有限公司 | Coupling voltage transforming system |
| CN110313121A (en) * | 2017-02-23 | 2019-10-08 | 路晟（上海）科技有限公司 | A kind of coupling transformation system |
| WO2018205370A1 (en) * | 2017-05-12 | 2018-11-15 | 厦门赛特勒磁电有限公司 | Power conversion module |
| WO2021168831A1 (en) * | 2020-02-28 | 2021-09-02 | Astec International Limited | Power measurements in switched mode power supplies |
| US11349387B2 (en) | 2020-02-28 | 2022-05-31 | Astec International Limited | Power measurements in switched mode power supplies |
| US11716016B2 (en) | 2020-02-28 | 2023-08-01 | Astec International Limited | Power measurements in switched mode power supplies |
| CN114184830A (en) * | 2021-11-01 | 2022-03-15 | 杭州涂鸦信息技术有限公司 | Zero-crossing detection circuit and electronic equipment |
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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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