CN208112495U - A kind of power supply change-over device for automobile electronic module - Google Patents
A kind of power supply change-over device for automobile electronic module Download PDFInfo
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- CN208112495U CN208112495U CN201820403145.XU CN201820403145U CN208112495U CN 208112495 U CN208112495 U CN 208112495U CN 201820403145 U CN201820403145 U CN 201820403145U CN 208112495 U CN208112495 U CN 208112495U
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- voltage
- module
- input
- stablizer
- power supply
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Abstract
A kind of power supply change-over device for automobile electronic module, power input, voltage identification module, voltage transformation module, energy-storage module and the power output end being sequentially connected electrically, due to before voltage is converted, the state of input voltage is identified by voltage identification module, it can avoid too high or too low voltage input to damage circuit module or chip, and voltage transformation module uses the voltage-stablizer of small package, the occupied space that power conversion module can be effectively reduced is significantly reduced the cost of power conversion module；The power supply change-over device for automobile electronic module of the application can provide high efficiency height and export stable voltage, it is suitable for the wide in range input of 7V~40V and the high current for providing maximum 3.5A is used for late-class circuit, in addition, the device is whole portable preferable, design efficiency can effectively improve.
Description
Technical field
This application involves technical field of automotive electronics, and in particular to a kind of power supply converting means for automobile electronic module
It sets.
Background technique
Power supply in order to ensure the normal use of each automobile electronic module, is needed almost necessary to each circuit
The voltage source of Vehicular accumulator cell input convert and is exported by voltage stabilizing chip, to obtain for electronic component use
DC voltage source.Due to the rapid development of present automobile microelectronic field, the integrated level of element is very high, and many low-power consumption are set
The standby requirement to power input quality is very high.The voltage stabilizing chip of existing big encapsulation occupies valuable fabric swatch space, complexity
The cost of the power supply conversion for being of peripheral circuit is very high, and Vehicular accumulator cell may also damage, it is possible to it be caused to input
Overtension is too low, and existing power-switching circuit often fails to consider the size of input voltage, easily causes circuit to damage, out
Existing failure.
Summary of the invention
The application provides a kind of power supply change-over device for automobile electronic module, which uses the pressure stabilizing core of small package
Piece, not only cost is relatively low, but also power supply translation exception rate is low, high-efficient, output voltage stabilization.
A kind of power supply change-over device for automobile electronic module provided by the present application, including：The power supply being sequentially connected electrically
Input terminal, voltage identification module, voltage transformation module, energy-storage module and power output end,
The voltage identification module is electrically connected with power input, reference voltage module, and the voltage identification module includes
The filter being electrically connected with reference voltage module, input voltage processing module, the input voltage processing module and power supply
Input terminal electrical connection, cascade after the input voltage processing module is used to prevent to damage when the overtension of power input input
The module connect, the filter rear class are connected with port protection module and sampler, and filter is connected by port protection module
The sampler；
The voltage transformation module includes voltage-stablizer, and the pin VN of the voltage-stablizer is electrically connected with the sampler, described
The pin VN of voltage-stablizer is also connected with filter capacitor, and the pin RT/SYNC of voltage-stablizer is connected with switching frequency control module, pressure stabilizing
The freewheeling diode that the pin SW of device has been connected with the inductance of rectified action and has shielded, inductance rear class are serially connected with matching
Resistance；
The build-out resistor is parallel with the energy-storage module, and the energy-storage module is also electrically connected with the pin FB of voltage-stablizer,
The energy-storage module rear class connects power output end.
In some embodiments, the voltage-stablizer is LMR14030 chip.
In some embodiments, the power output end is also connected with voltage regulation resistance and plays the light emitting diode of indicative function.
In some embodiments, the switching frequency of the switching frequency control module is 500KHz, the inductance value of the inductance
For 6.5UH.
According to above-described embodiment, the embodiment of the present application uses voltage identification module and voltage transformation module, in voltage
Before conversion, the state of input voltage is identified by voltage identification module, can avoid too high or too low voltage input to circuit
Module or chip damage, and voltage transformation module uses the voltage-stablizer of small package, can effectively reduce power supply modulus of conversion
The occupied space of block is significantly reduced the cost of power conversion module；The power supply for automobile electronic module of the application is converted
Device can provide high efficiency height and export stable voltage, is suitable for the wide in range input of 7V~40V and provides the big electricity of maximum 3.5A
Stream is used for late-class circuit, in addition, the device is whole portable preferable, can effectively improve design efficiency.
Detailed description of the invention
Fig. 1 is a kind of power supply change-over device structural block diagram for automobile electronic module provided by the present application；
Fig. 2 is a kind of structural block diagram of voltage identification module that embodiment provides；
Fig. 3 is a kind of power supply change-over device circuit diagram for automobile electronic module that a kind of embodiment provides.
Specific embodiment
The application is described in further detail below by specific embodiment combination attached drawing.Wherein different embodiments
Middle similar component uses associated similar element numbers.In the following embodiments, many datail descriptions be in order to
The application is better understood.However, those skilled in the art can recognize without lifting an eyebrow, part of feature
It is dispensed, or can be substituted by other elements, material, method in varied situations.In some cases, this Shen
Please it is relevant it is some operation there is no in the description show or describe, this is the core in order to avoid the application by mistake
More descriptions are flooded, and to those skilled in the art, these relevant operations, which are described in detail, not to be necessary, they
Relevant operation can be completely understood according to the general technology knowledge of description and this field in specification.
It is herein component institute serialization number itself, such as " first ", " second " etc., is only used for distinguishing described object,
Without any sequence or art-recognized meanings.And " connection ", " connection " described in applying, unless otherwise instructed, including it is direct and
(connection) is connect in succession.
With reference to Fig. 1-Fig. 2, the application provides a kind of power supply change-over device for automobile electronic module, which includes：
Power input, voltage identification module, voltage transformation module, energy-storage module and the power output end being sequentially connected electrically.
The voltage identification module is electrically connected with power input, reference voltage module, and the voltage identification module includes,
Input voltage processing module, filter, port protection module and sampler.
Input voltage processing module includes divider resistance and Voltage stabilizing module, what divider resistance was used to input in power input
When voltage u1 is excessively high, guarantee that input voltage u1 is no more than the ceiling voltage that sampler port can be detected；The Voltage stabilizing module is used for
It prevents from causing when input signal input voltage u1 is excessively high detection sampler port voltage is excessively high to burn chip.Input voltage handles mould
Block is the prior art, and this will not be repeated here for specific structure.
The filter is electrically connected with reference voltage module, input voltage processing module, for filtering out High-frequency Interference, institute
It states input voltage processing module to be electrically connected with power input, the input voltage processing module is for preventing power input defeated
The module of rear class connection is damaged when the overtension entered.
The filter rear class is connected with port protection module and sampler, and filter connects institute by port protection module
State sampler.Port protection module is the prior art, for preventing input current excessive by the means of current limliting or pressure limiting, is realized
Protection to sampler port；In some embodiments, sampler is the single-chip microcontroller with AD sampling functions, identifies input voltage
U1 is high and low or normal condition.
Voltage transformation module includes：Voltage-stablizer.The pin VN of the voltage-stablizer is electrically connected with the sampler, the pressure stabilizing
The pin VN of device is also connected with filter capacitor, and the pin RT/SYNC of voltage-stablizer is connected with switching frequency control module, voltage-stablizer
The freewheeling diode that pin SW has been connected with the inductance of rectified action and has shielded, inductance rear class are serially connected with matching electricity
Resistance；The energy-storage module is also electrically connected with the pin FB of voltage-stablizer, and the energy-storage module rear class connects power output end；The electricity
Source output terminal is also connected with voltage regulation resistance and plays the light emitting diode of indicative function.
With reference to Fig. 3, in a specific embodiment, the voltage-stablizer U14 is LMR14030 chip.
Voltage identification module output end (i.e. sampler output) is electrically connected with the pin VN of voltage-stablizer U14, voltage-stablizer U14
Pin VN and voltage-stablizer U14 between be connected with storage capacitor C90 in parallel, filter capacitor C96 and filter capacitor C95, it is described
Storage capacitor C90, filter capacitor C96 and the uniform end ground connection of filter capacitor C95, the other end are electrically connected with the pin VN, pressure stabilizing
The pin GND of device U14 is grounded；
Switching frequency control module R45 is connected between the pin RT/SYNC and ground of voltage-stablizer U14；
Capacitor C92 is provided between the pin SW of the pin BOOT and voltage-stablizer U14 of voltage-stablizer U14, C92 is bootstrapping electricity
Hold (i.e. Cboot capacitor), plays the role of boosting；
Capacitor C93 is also connected between the pin SS and ground of voltage-stablizer U14, C93 is used for soft start；
The freewheeling diode that the pin SW of voltage-stablizer U14 has been connected with the inductance L6 of rectified action and has shielded
V21, specifically, freewheeling diode V21 are used to prevent in the moment inductance L6 that input power disconnects voltage to the circuit of rear class
It has an impact；
It is high-precision that concatenated build-out resistor R46 and build-out resistor R47, R46, R47 are connected between inductance L6 and ground
Build-out resistor, the resistance value of R46, R47 determine the voltage value of power output end U2, in a specific embodiment, power output end
U2 is 5V output.
Concatenated build-out resistor R46 and build-out resistor R47 are parallel with storage capacitor C91 and storage capacitor C94, build-out resistor
R46 is also electrically connected with the pin FB of voltage-stablizer U14 with the tie point of build-out resistor R47, storage capacitor C91 and storage capacitor C94
Rear class is connected with power output end U2, and the effect of C91, C94 is provides stable electricity for late-class circuit by power output end U2
Pressure.
The embodiment of the present application uses voltage identification module and voltage transformation module, before voltage conversion, passes through electricity
The state for pressing identification module identification input voltage, can avoid too high or too low voltage input and causes to damage to circuit module or chip
Bad, voltage transformation module uses small package voltage-stablizer, can effectively reduce the occupied space of power conversion module, be significantly reduced
The cost of power conversion module；It is steady that the power supply change-over device for automobile electronic module of the application can provide the output of high efficiency height
Fixed voltage, is suitable for the wide in range input of 7V~40V and the high current for providing maximum 3.5A is used for late-class circuit, in addition, should
The whole portability of device preferably, can effectively improve design efficiency.
In some embodiments, the power output end U2 is also connected with luminous the two of voltage regulation resistance R43 and indicative function
Pole pipe D3.
The switching frequency control module R45 is the prior art, in some embodiments, the switching frequency control module
The switching frequency of R45 is 500KHz.
In a specific embodiment, the inductance value of inductance L6 is 6.5UH, and the specification of C90 is 100uF/50V, the specification of C95
For 10uF/50V, the specification of C96 is 0.1uF/50V, and the specification of R45 is 49.9K, 500KHz, and the capacitance of C92, C93 are
The specification of 0.1uF, C91 are 47uF/15V, and the specification of C96 is 47uF/15V, and the specification of L6 is 6UH, 3A, and R43 specification is 1K
Europe, R46 specification are the Europe 68K, and R46 specification is the Europe 12K.
Use above specific case is illustrated the application, is merely used to help understand the application, not to limit
The application processed.For the application person of ordinary skill in the field, according to the thought of the application, can also make several simple
It deduces, deform or replaces.
Claims (4)
1. a kind of power supply change-over device for automobile electronic module, which is characterized in that including：The power input being sequentially connected electrically
End, voltage identification module, voltage transformation module, energy-storage module and power output end,
The voltage identification module is electrically connected with power input, reference voltage module, and the voltage identification module includes and ginseng
Examine voltage module, the filter that input voltage processing module is electrically connected, the input voltage processing module and power input
End electrical connection, the input voltage processing module are used to prevent to damage rear class connection when the overtension of power input input
Module, the filter rear class are connected with port protection module and sampler, and filter passes through described in the connection of port protection module
Sampler；
The voltage transformation module includes voltage-stablizer, and the pin VN of the voltage-stablizer is electrically connected with the sampler, the pressure stabilizing
The pin VN of device is also connected with filter capacitor, and the pin RT/SYNC of voltage-stablizer is connected with switching frequency control module, voltage-stablizer
The freewheeling diode that pin SW has been connected with the inductance of rectified action and has shielded, inductance rear class are serially connected with matching electricity
Resistance；
The build-out resistor is parallel with the energy-storage module, and the energy-storage module is also electrically connected with the pin FB of voltage-stablizer, described
Energy-storage module rear class connects power output end.
2. being used for the power supply change-over device of automobile electronic module as described in claim 1, which is characterized in that the voltage-stablizer is
LMR14030 chip.
3. being used for the power supply change-over device of automobile electronic module as described in claim 1, which is characterized in that the power supply output
End is also connected with voltage regulation resistance and plays the light emitting diode of indicative function.
4. being used for the power supply change-over device of automobile electronic module as described in claim 1, which is characterized in that the switching frequency
The switching frequency of control module is 500KHz, and the inductance value of the inductance is 6.5UH.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820403145.XU CN208112495U (en) | 2018-03-23 | 2018-03-23 | A kind of power supply change-over device for automobile electronic module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820403145.XU CN208112495U (en) | 2018-03-23 | 2018-03-23 | A kind of power supply change-over device for automobile electronic module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208112495U true CN208112495U (en) | 2018-11-16 |
Family
ID=64122612
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820403145.XU Expired - Fee Related CN208112495U (en) | 2018-03-23 | 2018-03-23 | A kind of power supply change-over device for automobile electronic module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208112495U (en) |
-
2018
- 2018-03-23 CN CN201820403145.XU patent/CN208112495U/en not_active Expired - Fee Related
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181116 Termination date: 20210323 |