CN205622518U - Miniaturized altimeter multiplexed output DCDC power module of high performance - Google Patents

Miniaturized altimeter multiplexed output DCDC power module of high performance Download PDF

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Publication number
CN205622518U
CN205622518U CN201620433914.1U CN201620433914U CN205622518U CN 205622518 U CN205622518 U CN 205622518U CN 201620433914 U CN201620433914 U CN 201620433914U CN 205622518 U CN205622518 U CN 205622518U
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circuit
power module
output
voltage
altimeter
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何颖
杨兵
江飞
张晖
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CETC 58 Research Institute
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CETC 58 Research Institute
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Abstract

The utility model relates to a miniaturized altimeter multiplexed output DCDC power module of high performance, power module includes the input filter circuit, power control circuit, the voltage transformation circuit, output Rectifier filter circuit, an output voltage regulator circuit, feedback circuit, buffer circuit, compensating circuit and protection circuit, power module input voltage 18Vdc~36Vdc, through the input filter circuit, power control circuit, the voltage transformation circuit, output Rectifier filter circuit, feedback circuit, buffer circuit, compensating circuit and protection circuit, voltage stabilizing circuit divides three routes output voltage through output, the LTCC technique is adopted in the power module encapsulation, power control circuit adopts high integrated PWM power control chip. The utility model discloses an above -mentioned mode for power module is small, good reliability, light in weight.

Description

A kind of high performance mini altimeter multiple-channel output DC/DC power module
Technical field
This utility model relates to a kind of power module, especially a kind of high performance mini altimeter multiple-channel output DC/DC power supply mould Block.
Background technology
Altimeter is a kind of measurement with instruction aircraft away from height above sea level face or the instrument of ground vertical dimension, divides from its operation principle, Pressure altimeter and radio altimeter two kinds can be divided into.According to atmospheric composition and feature, it is known that the air pressure of air is along with height The increase of degree and reduce, pressure altimeter is through measuring air pressure, and indirectly to measure the flying height of aircraft (high away from height above sea level face Degree), it is now widely used in all kinds of aircraft.The now application to aircraft require more and more higher (miniaturization, portable, Multi-functional, digitized and high reliability, high-performance aspect), it is achieved function get more and more, increase function and mean to increase more Many devices or increase the function of device and performance, so certainly will cause the increase of overall plan volume, weight, how to reduce this It is the work studied for a long period of time a bit.
For airborne power supply, weight and volume requires more and more higher, and along with the development of Switching Power Supply, small size, high power are close Degree increasingly becomes pursuing a goal and developing direction of Switching Power Supply, various reduction power volumes, the skill of raising power density Art is arisen at the historic moment.For insulating power supply, the technology that can improve accordingly is also a lot, such as transformer technology, by improving The ratio of the various material compositions in magnetic core magnetic powder improves the characteristic of magnetic core magnetic powder, thus reduces transformer size, transformator around Group forwards to make transformer size less printed board from skeleton;The new technique of topological structure, makes loss less, in hgher efficiency;Control The Highgrade integration of circuit processed makes peripheral circuit simpler, and external devices is less, etc..These methods all make the size of power supply More and more less, weight is more and more lighter.
The Switching Power Supply of traditional comparative maturity uses multilayered printed plate technique, will be the most first by welding or other modes Device (active and passive device) is placed on the printing board surface of various sheet material, this mode design and debugging during very Convenient, components and parts can be changed according to demand.Due to device all on the surface of printed board, the size of whole power supply is made not subtract Few more.
It addition, in traditional altimeter application, the combination that power supply uses single channel to export needs to the power supply realizing multiple power supplies Asking, each power supply may reuse the device of identical function, which not only adds number of devices and weight, and increases Volume.
The most how allowing the volume weight the least of DC/DC power module in the case of ensureing power supply function performance is gentlier one Research direction.LTCC low-temperature co-fired ceramic substrate and miniaturization stack technology greatly reduce by the volume of power module.
Utility model content
The technical problems to be solved in the utility model is to overcome existing defect, it is provided that a kind of high performance mini altimeter multichannel is defeated Go out DC/DC power module, use the combination of LTCC technology and highly integrated power supply control chip to make power volume less, Weight is lighter.
In order to solve above-mentioned technical problem, this utility model provides following technical scheme:
This utility model one high performance mini altimeter multiple-channel output DC/DC power module, power module includes input filter Circuit, power control circuit, voltage conversion circuit, output rectifier and filter, output voltage stabilizing circuit, feedback circuit, isolation Circuit, compensation circuit and protection circuit, power module input voltage 18Vdc~36Vdc, control through input filter circuit, power supply Circuit, voltage conversion circuit, output rectifier and filter, feedback circuit, isolation circuit, compensation circuit and protection circuit, logical Cross output voltage stabilizing circuit and divide three road output voltages;Power module encapsulation uses LTCC technology;Power control circuit uses height collection Become PWM power supply control chip.
Further, output voltage stabilizing circuit includes changing voltage transformer, sampling feedback circuit and LDO, changes voltage transformer Realizing three road output voltage conversion, a road main road exports sampled feedback circuit and carries out voltage stabilizing regulation, and the output of two-way bypass makes respectively Increase voltage order one conversion with LDO and carry out voltage stabilizing.
Further, there is no centre tap between the output of two-way bypass.
Further, power module uses power metal shell, and shell uses 10# Steel material.
The beneficial effects of the utility model: use the combination of LTCC technology and highly integrated power supply control chip allow power source body Long-pending less, weight is lighter.Highly integrated power supply control chip makes the peripheral circuit of whole power module simply, and components and parts are less, Need the place adjusted the most less;LTCC technology is by various passive devices, such as electric capacity, resistance, impedance transducer, filtering In the device embedment multilayer ceramic substrates such as device, form three-dimensional space and non-interfering highly integrated circuit, be coated with run-in index printing Cloth manufacturing process sinters, and forms integrated form ceramic component, can decrease surface further by circuit miniaturization and high integration The quantity of attached passive element, the number of interfaces of the different materials that attachment and electric interconnection are caused is greatly decreased.Thus, also make Packaging density and reliability increase substantially;Decrease solder joint, add credibility;Decrease corrosion and the impact of humidity;Its High temperature resistant, dispel the heat good, the heat radiation to power device has the biggest help.Owing to being multiple-channel output DC/DC power module, and Required precision for power supply is the highest, in this utility model, only uses a conversion voltage transformer to complete in voltage transformation The conversion of all voltages, in order to ensure that the precision of voltage regulation of every road output voltage is 1%, wherein a road is output main road, uses ratio Relatively feedback circuit, additionally two-way output use LDO is to its voltage stabilizing, to reach to reduce the purpose of volume.
Accompanying drawing explanation
Fig. 1 is the theory diagram of a kind of high performance mini altimeter multiple-channel output DC/DC power module;
Fig. 2 is the output voltage stabilizing circuit block diagram of a kind of high performance mini altimeter multiple-channel output DC/DC power module;
Fig. 3 is the encapsulation general picture figure of a kind of high performance mini altimeter multiple-channel output DC/DC power module.
Detailed description of the invention
Embodiment cited by this utility model, is only intended to help and understands this utility model, should not be construed as this utility model The restriction of protection domain, for those skilled in the art, on the premise of without departing from this utility model thought, Can also make improvements and modifications this utility model, these improve and modify the model also falling into the protection of this utility model claim In enclosing.
As it is shown in figure 1, be the theory diagram of a kind of high performance mini altimeter multiple-channel output DC/DC power module.This electricity Source module includes input filter circuit 1, power control circuit 2, voltage conversion circuit 3, output rectifier and filter 4, output Mu balanced circuit 5, feedback circuit 6, isolation circuit 7, compensation circuit 8 and protection circuit 9.Protection circuit 9 includes output overvoltage Protection, output overcurrent protection, overheat protector, short-circuit protection and input reverse-connection protection.This power module input voltage 28Vdc (model Enclose: 18Vdc~36Vdc), through input filter circuit 1, power control circuit 2, voltage conversion circuit 3, output rectification filter Circuit 4, feedback circuit 6, isolation circuit 7, compensation circuit 8 and protection circuit 9, export three tunnel works through output voltage stabilizing circuit 5 Making voltage :+15V ,-15V and+5V, output is about 28W.
Power control circuit 2 uses highly integrated PWM power supply control chip, provides corresponding HF switch letter in control chip Number and be internally integrated switching power tube and internal corresponding control signal, external circuit only has several resistance and several low capacitance electric capacity to use Loop compensation in regulation circuit.
For reducing volume weight further, ensure the high request to output voltage precision simultaneously, use a conversion voltage transformer 51 conversion completing multiple-channel output voltage, the mode simultaneously increasing low dropout voltage regulator (LDO) completes.A wherein road master Road is output as exporting the 5V that electric current is bigger, and voltage regulation way is that sampling feedback circuit 52 carries out voltage stabilizing regulation;Additionally two-way bypass is defeated Go out 15V and-15V, use LDO to increase voltage order one conversion respectively and reach the purpose of voltage stabilizing.See Fig. 2, wherein, 15V There is no centre tap with-15V, therefore the output of this two-way will not produce the change of output voltage along with the increase and decrease of any one road electric current, The output stability and the reliability that make this power module are protected.
As it is shown on figure 3, be that a kind of high performance mini altimeter multiple-channel output DC/DC power module uses LTCC technology envelope The general picture figure of dress, according to design principle, imbeds passive devices such as low-capacitance electric capacity, resistance, inductance in ceramic substrate, other Active device, is then placed on ceramic base plate surface such as power supply control chip, voltage conversion chip etc., and power conversion transformer then makes It is placed on outside ceramic substrate by high frequency planar transformator mode.Because LTCC is suitable for big electric current and high-temperature stability requirement, tool There is good temperature characterisitic, such as less thermal coefficient of expansion, the less dielectric constant coefficient of stability, the heat of ltcc substrate material Conductance is 20 times of organic lamination plate, therefore can simplify thermal design, hence it is evident that improve the life and reliability of circuit.
This power module uses power metal shell, and selected materials is the 10# steel that mass density is less, at glass insulator Thickness is outside 1.5mm, and at the bottom of shell and surrounding thickness is 0.5mm.This shell has good heat dispersion, by heat consumption unit device Part is close to tube wall by the Heat Conduction Material of heat conductivity more than 2.0, reaches more preferable radiating effect.
The encapsulation of this power module uses LTCC low-temperature co-fired ceramic substrate, power metal shell and miniaturization laminated process technology. Power module volume 45mm × 30mm × 8.0mm, weight 50g.By the way so that volume of the present utility model is little, Highly reliable, lightweight.

Claims (4)

1. a high performance mini altimeter multiple-channel output DC/DC power module, it is characterised in that: described power module bag Include input filter circuit (1), power control circuit (2), voltage conversion circuit (3), output rectifier and filter (4), defeated Go out mu balanced circuit (5), feedback circuit (6), isolation circuit (7), compensate circuit (8) and protection circuit (9), power module Input voltage 18Vdc~36Vdc, through input filter circuit (1), power control circuit (2), voltage conversion circuit (3), defeated Go out current rectifying and wave filtering circuit (4), feedback circuit (6), isolation circuit (7), compensate circuit (8) and protection circuit (9), pass through Output voltage stabilizing circuit (5) point three road output voltages;The encapsulation of described power module uses LTCC technology;Described power control circuit (2) highly integrated PWM power supply control chip is used.
High performance mini altimeter multiple-channel output DC/DC power module the most according to claim 1, it is characterised in that: Described output voltage stabilizing circuit (5) includes changing voltage transformer (51), sampling feedback circuit (52) and LDO (53), turns Changing voltage transformer (51) and realize three road output voltage conversion, a road main road exports sampled feedback circuit (52) and carries out voltage stabilizing Regulation, the output of two-way bypass uses LDO (53) to increase voltage order one respectively and converts voltage stabilizing.
High performance mini altimeter multiple-channel output DC/DC power module the most according to claim 2, it is characterised in that: Centre tap is not had between the output of described two-way bypass.
High performance mini altimeter multiple-channel output DC/DC power module the most according to claim 1, it is characterised in that: Described power module uses power metal shell, and shell uses 10# Steel material.
CN201620433914.1U 2016-05-13 2016-05-13 Miniaturized altimeter multiplexed output DCDC power module of high performance Active CN205622518U (en)

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Application Number Priority Date Filing Date Title
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105790592A (en) * 2016-05-13 2016-07-20 中国电子科技集团公司第五十八研究所 High-performance miniaturized altimeter multi-output DC/DC power source module

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105790592A (en) * 2016-05-13 2016-07-20 中国电子科技集团公司第五十八研究所 High-performance miniaturized altimeter multi-output DC/DC power source module

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