CN2805207Y - High temp. isolation electric power module - Google Patents
High temp. isolation electric power module Download PDFInfo
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- CN2805207Y CN2805207Y CN 200520078946 CN200520078946U CN2805207Y CN 2805207 Y CN2805207 Y CN 2805207Y CN 200520078946 CN200520078946 CN 200520078946 CN 200520078946 U CN200520078946 U CN 200520078946U CN 2805207 Y CN2805207 Y CN 2805207Y
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Abstract
The utility model relates to a secondary power module, which is a DC/DC isolation power module of high temperature, wherein one path of the DC/DC isolation power module of high temperature is used for inputting and three paths are used for outputting. DC voltage of 28 V is input, and DC voltage of +12V,-12V and 6V is output. The utility model is mainly composed of an input filter circuit, a control part, a switch circuit, a transformer, an output rectifying filter circuit and an over current protection circuit, wherein the control part uses a PWM pulse width modulator to control. The switch circuit is realized by using a field effect tube, the output rectifying filter circuit is composed of a diode, electrical inductance, capacitance, etc., and the over current protection circuit is composed of a current detection resistor and an integrating circuit. The utility model belongs to a thick film DC/DC power module of chip-level hybrid integration and uses a single-ended normal shock circuit, and the utility model has the advantages of optical coupling isolation, high switching frequency, wide operating temperature ranges, high integration level, small size, light weight, high temperature resistance and high reliability. Structurally, the process of thick film hybrid integration, the assembly of bare chips and the complete airtight encapsulation of a metal casing are used.
Description
Technical field the utility model relates to a kind of secondary power supply module, especially high temperature resistant, subminiature high temperature insulating power supply module.
Generally all volume is bigger for the power module of background technology routine, and the integrated circuit that is adopted mostly is the product of plastic packaging product or ceramic packaging, and resistance mostly is Chip-R, not only volume is bigger, and high-temperature resistant result is bad, and this makes that whole module working temperature is lower, has only-55 ℃～85 ℃; In addition, existing power supply module has greatly can't realize level Hermetic Package, and under some special occasions, the power supply of this routine can't satisfy user's instructions for use at all.
Utility model content the technical problems to be solved in the utility model provides a kind of high temperature resistant, volume is little, reliability is high high temperature insulating power supply module.
The utility model adopts following technical scheme: a kind of high temperature insulating power supply module is characterized by: it is the single channel input, the DC/DC power module of three tunnel outputs; Input 28V direct voltage, output+12V ,-12V, 6V direct voltage; It is by input filter circuit, the control circuit that adopts PWM pulse width modulator and outward element thereof to form, FET switch circuit, transformer, by the output rectifier and filter that components and parts such as diode, inductance, electric capacity are formed, the current foldback circuit that current sense resistor and integrating circuit constitute is formed; Input voltage is through former limit of input filter circuit input transformer and accessory power supply, this accessory power supply provides power supply for control circuit PWM pulse width modulator, pulse width modulator produces high-frequency pulse signal, the conducting of this signal control switch circuit field effect transistor with end, field effect transistor produces high-frequency pulse voltage, through the transformer step-down, produce positive negative output voltage through output rectifier and filter again; Adopt optical coupling isolation circuit between input voltage and output voltage.
The utility model is a kind of a kind of DC/DC power module that adopts thick film hybrid multilayer wiring integrated technique to produce, integrated circuit all adopts the bare chip assembling, resistance is printed resistor, the Can level Hermetic Package, and its advantage mainly shows: substrate adopts 96% AL
2O
3Ceramic substrate, conductive coefficient is good, the intensity height; Conduction band, weld zone, resistance and medium all adopt the multilayer wiring film-forming process of printing and sintering, and adhesive force is good, and resistance is accurately adjustable, and the resistance value temperature is floated little, medium insulativity height; The part components and parts adopt the bare chip assembling, Si-Al wire bonding, and adopt transition plate technology during the high-power chip bonding, and the reliability height has so just improved the integrated level of circuit greatly; In addition, its packing forms is the full air-tight packaging of metal shell, and cavity contains 99.9% high pure nitrogen, guarantees that in the work or the process of storing inner each components and parts can not be subjected to the corrosion or the oxidation of other atmosphere.Therefore this high temperature insulating power supply module has integrated level height, volume is little, in light weight, high temperature resistant and reliability is high advantage.Has good practical value.
Basic principle of the present utility model is: at first, input voltage is supplied with the former limit of transformer behind input filter circuit, produce an accessory power supply simultaneously, power supply is provided for the PWM pulse width modulator of control section, pulse width modulator produces high-frequency pulse signal then, the conducting of this signal control switch circuit field effect transistor with end, thereby produce high-frequency pulse voltage, through the transformer step-down, produce positive negative output voltage through output rectifier and filter again.Simultaneously, the current foldback circuit of current sense resistor that links to each other with the fet switching circuit pipe and resistance-capacitance network formation and the current detecting end of PWM pulse width modulator join; The voltage at current sense resistor two ends is sent into the current detecting end of PWM pulse width modulator behind the resistance-capacitance network integration, when voltage surpasses 1V, the PWM pulse width modulator will stop to export widened pulse with the protection field effect transistor.
As circuit output master control circuit controls 24V, promptly adopt 2.5V reference voltage control ± 12V two ends output voltage, 6V adopts linear voltage stabilization to obtain.Because this circuit belongs to the single-ended forward type converter, so output has increased fly-wheel diode, when the field effect pipe turn-offed, fly-wheel diode and energy storage output common mode inductance constituted discharge loop, continued load resistance is powered.In addition, the current detection voltage at the current sense resistor two ends of field effect transistor source electrode is sent into the current detecting end of pulse width modulator behind integration, and when voltage surpasses 1V, pulse width modulator will stop to export widened pulse with the protection switch pipe.Isolation method between input and output adopts light-coupled isolation, and when output voltage changes, optocoupler is delivered to feedback end, the error that is pulse width modulator is amplified the voltage of input also in variation, the inner 2.5V reference voltage of this voltage and pulse width modulator compares, produce control voltage, the conducting of controlling field effect transistor with end, thereby realize the stable of output voltage.And, adopt the light-coupled isolation technology, make the input and output good insulation preformance.
Description of drawings Fig. 1 is a theory diagram of the present utility model;
Fig. 2 is an isolation feedback circuit of the present utility model;
Fig. 3 is the utility model positive activation type converter main loop circuit figure.
Embodiment Fig. 1 shows theory diagram of the present utility model, a kind of high temperature insulating power supply module, and it is the single channel input, the DC/DC power module of three tunnel outputs; Input 28V direct voltage, output+12V ,-12V, 6V direct voltage; It is by input filter circuit (being made up of input filter inductance and input filter capacitor), the control circuit that adopts PWM pulse width modulator (current control mode pulse width modulator UC1843) and outward element thereof to form, FET switch circuit, transformer (single-ended forward type transformer), by the output rectifier and filter that components and parts such as diode, inductance, electric capacity are formed, the current foldback circuit that current sense resistor and integrating circuit constitute is formed; Input voltage is through former limit of input filter circuit input transformer and accessory power supply, the output of this accessory power supply is connected with the PWM pulse width modulator input of control circuit, for control circuit PWM pulse width modulator provides power supply, pulse width modulator produces high-frequency pulse signal, the conducting of this signal control switch circuit field effect transistor with end, field effect transistor produces high-frequency pulse voltage, through the transformer step-down, again through output rectifier and filter generation ± 12V output voltage; + 12V voltage is through behind the linear voltage stabilization, obtains+output voltage of 6V; Between input voltage and output voltage light-coupled isolation (miniature sheet photoelectrical coupler GH4023 finishes and isolates output), + 12V voltage is after the divider resistance sampling, be input to the photocapacitance coupler, the output signal of photocapacitance coupler is delivered in the control circuit of PWM pulse width modulator composition.The current transfer ratio CTR of photocapacitance coupler＞100%, isolation resistance 〉=1010, and suitable surface mounting technology.
Fig. 2 is a light-coupled isolation feedback circuit of the present utility model, triode 1001 constitutes optical coupling isolation circuit with light-emitting diode 1002, triode 1001 collector electrodes connect 8 pin of PWM pulse width modulator 9, the resistance-capacitance network 12 that triode 1001 emission collection connecting resistance R1 and capacitor C 1 are formed, resistance-capacitance network 12 two ends connect 1 of PWM pulse width modulator 9 respectively, 2 pin feedback ends, a resistance R 2 ground connection are gone back and connect to triode 1001 emission collection, S is LM431, it is a kind of accurate a reference source, its output reference is 2.5V, output divider resistance R4, R5 and load end 11 join, load end 11 also is connected to resistance R 3, other end sending and receiving optical diode 1002 anodes of resistance R 3, when output voltage changes, by resistance R 3 luminous intensity of the light-emitting diode 1002 of optocoupler is changed, and then the output voltage of triode 1001 in the optocoupler is changed, output voltage connects 2 pin of PWM pulse width modulator 9, this voltage and PWM pulse width modulator 9 inner 2.5V benchmark compare, control the variation of output pulse with this, thereby make output voltage reach stable.And 1,2 pin feedbacks termination R1 and C1 resistance-capacitance network 12, satisfy certain frequency response and gain, the while is also played the effect of stablizing whole system.
Fig. 3 illustrates the utility model positive activation type converter main loop circuit figure, and power input also meets the former limit Np of transformer, the self-holding Nr of transformer, 7 pin of the self-holding Nr output of transformer termination PWM pulse width modulator 9; Field effect transistor Q source class and resistance R 1 are joined, and the former limit winding Np that leaks level and transformer joins, and grid connects 6 pin of PWM pulse width modulator 9; The inferior limit winding Ns of transformer connects output rectifier and filter, and output rectifier and filter is made up of diode D1, sustained diode 2, inductance L o, capacitor C o; The resistance R 1 of serial connection, current sense resistor R2 and capacitor C 1 are formed current foldback circuit, and current detecting end 3 pin of current foldback circuit and PWM pulse width modulator 9 join; The voltage at current sense resistor R2 two ends is sent into current detecting end 3 pin of PWM pulse width modulator 9 behind R1, C1 integration, when voltage surpasses 1V, PWM pulse width modulator 9 will stop to export widened pulse with protection field effect transistor Q.
Claims (4)
1, a kind of high temperature insulating power supply module, it is the single channel input, the DC/DC power module of three tunnel outputs; Input 28V direct voltage, output+12V ,-12V, 6V direct voltage; It is characterized by: it is by input filter circuit, the control circuit that adopts PWM pulse width modulator and outward element thereof to form, FET switch circuit, transformer, by the output rectifier and filter that components and parts such as diode, inductance, electric capacity are formed, the current foldback circuit that current sense resistor and integrating circuit constitute is formed; Input voltage is through former limit of described input filter circuit input transformer and accessory power supply, described accessory power supply provides power supply for control circuit PWM pulse width modulator, described pulse width modulator produces high-frequency pulse signal, the conducting of the described fet switching circuit pipe of this signal controlling with end, described field effect transistor produces high-frequency pulse voltage, through described transformer step-down, produce positive negative output voltage through described output rectifier and filter again; Adopt optical coupling isolation circuit between input voltage and output voltage.
2, a kind of high temperature insulating power supply module as claimed in claim 1; it is characterized by: the output of described accessory power supply is connected with the described PWM pulse width modulator input of described control circuit; described FET switch circuit is connected with described control circuit, and described current foldback circuit is connected with described control circuit.
3, a kind of high temperature insulating power supply module as claimed in claim 1 or 2, it is characterized by: described Input voltage terminal also connects controlling oneself (Nr) of the former limit (Np) of described transformer, described transformer, 7 pin of (Nr) the output described PWM pulse width modulator of termination (9) of controlling oneself of described transformer; Described field effect transistor (Q) source class and resistance (R6) join, and former limit winding (Np) of leaking level and described transformer joins, and grid connects 6 pin of described PWM pulse width modulator (9); Inferior limit winding (Ns) of described transformer connects described output rectifier and filter, and described output rectifying and wave-filtering is made up of circuit diode (D1), fly-wheel diode (D2), inductance (Lo), electric capacity (Co); The described resistance (R6) of serial connection, current sense resistor (R7) are formed described current foldback circuit with electric capacity (C2), and current detecting end 3 pin of described current foldback circuit and described PWM pulse width modulator (9) join.
4, a kind of high temperature insulating power supply module as claimed in claim 3, it is characterized by: triode (1001) constitutes described optical coupling isolation circuit (10) with light-emitting diode (1002), described triode (1001) collector electrode connects 8 pin of described PWM pulse width modulator (9), the resistance-capacitance network (12) that described triode (1001) emission collection connecting resistance (R1) and electric capacity (C1) are formed, described resistance-capacitance network (12) two ends connect 1 of described PWM pulse width modulator respectively, 2 pin feedback ends, a resistance (R2) ground connection is gone back and connect to described triode (1001) emission collection, output divider resistance (R4, R5) join with load end (11), described load end (11) also is connected to resistance (R3), the described light-emitting diode of another termination (1002) anode of described resistance (R3), described output voltage connects 2 pin of described PWM pulse width modulator (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520078946 CN2805207Y (en) | 2005-06-17 | 2005-06-17 | High temp. isolation electric power module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520078946 CN2805207Y (en) | 2005-06-17 | 2005-06-17 | High temp. isolation electric power module |
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| CN2805207Y true CN2805207Y (en) | 2006-08-09 |
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| CN 200520078946 Expired - Fee Related CN2805207Y (en) | 2005-06-17 | 2005-06-17 | High temp. isolation electric power module |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101521462B (en) * | 2008-02-29 | 2011-06-29 | 群康科技(深圳)有限公司 | Switch power supply circuit |
| US8207718B2 (en) | 2008-02-15 | 2012-06-26 | Innocom Technology (Shenzhen) Co., Ltd. | Switching power supply circuit |
| CN103534919A (en) * | 2011-06-09 | 2014-01-22 | 富士电机株式会社 | LED driving circuit |
| CN104242615A (en) * | 2014-09-25 | 2014-12-24 | 北京航空航天大学 | High-temperature isolated power device |
| CN106872067A (en) * | 2017-02-21 | 2017-06-20 | 焦海军 | A kind of temperature isolation Acquisition Circuit |
| CN107800275A (en) * | 2017-12-08 | 2018-03-13 | 成都前锋电子仪器有限责任公司 | A kind of Switching Power Supply for pulse pattern generator |
| CN108832824A (en) * | 2018-06-29 | 2018-11-16 | 河南孚点电子科技有限公司 | A kind of high efficiency switch power supply based on positive activation type |
| CN110875734A (en) * | 2018-08-30 | 2020-03-10 | 贵州振华群英电器有限公司（国营第八九一厂） | Input/output circuit for solid-state relay and solid-state relay |
| CN111816508A (en) * | 2020-07-21 | 2020-10-23 | 贵州天义电器有限责任公司 | Contactor coil driving hybrid integrated circuit based on thick film technology |
-
2005
- 2005-06-17 CN CN 200520078946 patent/CN2805207Y/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8207718B2 (en) | 2008-02-15 | 2012-06-26 | Innocom Technology (Shenzhen) Co., Ltd. | Switching power supply circuit |
| CN101521462B (en) * | 2008-02-29 | 2011-06-29 | 群康科技(深圳)有限公司 | Switch power supply circuit |
| CN103534919A (en) * | 2011-06-09 | 2014-01-22 | 富士电机株式会社 | LED driving circuit |
| CN103534919B (en) * | 2011-06-09 | 2016-08-24 | 富士电机株式会社 | Led drive circuit |
| US10512137B2 (en) | 2011-06-09 | 2019-12-17 | Fuji Electric Co., Ltd. | LED drive circuit |
| CN104242615A (en) * | 2014-09-25 | 2014-12-24 | 北京航空航天大学 | High-temperature isolated power device |
| CN106872067A (en) * | 2017-02-21 | 2017-06-20 | 焦海军 | A kind of temperature isolation Acquisition Circuit |
| CN106872067B (en) * | 2017-02-21 | 2023-10-17 | 焦海军 | Temperature isolation acquisition circuit |
| CN107800275A (en) * | 2017-12-08 | 2018-03-13 | 成都前锋电子仪器有限责任公司 | A kind of Switching Power Supply for pulse pattern generator |
| CN108832824A (en) * | 2018-06-29 | 2018-11-16 | 河南孚点电子科技有限公司 | A kind of high efficiency switch power supply based on positive activation type |
| CN110875734A (en) * | 2018-08-30 | 2020-03-10 | 贵州振华群英电器有限公司（国营第八九一厂） | Input/output circuit for solid-state relay and solid-state relay |
| CN111816508A (en) * | 2020-07-21 | 2020-10-23 | 贵州天义电器有限责任公司 | Contactor coil driving hybrid integrated circuit based on thick film technology |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060809 Termination date: 20130617 |