CN105978077B - Vehicular communication equipment multiple step format charger - Google Patents
Vehicular communication equipment multiple step format charger Download PDFInfo
- Publication number
- CN105978077B CN105978077B CN201610413335.5A CN201610413335A CN105978077B CN 105978077 B CN105978077 B CN 105978077B CN 201610413335 A CN201610413335 A CN 201610413335A CN 105978077 B CN105978077 B CN 105978077B
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- China
- Prior art keywords
- charging device
- operational amplifier
- power supply
- output end
- charge
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/0071—Regulation of charging or discharging current or voltage with a programmable schedule
Abstract
Vehicular communication equipment multiple step format charger, including charge power supply, it is electrically charged power supply and reference voltage, it further include level-one charging module and second level charging module；The level-one charging module includes the first operational amplifier, the first charging device；The second level charging module includes second operational amplifier, the second charging device；The output end of first charging device and the second charging device is connected separately with the first capacitor and the second capacitor of other end ground connection；It further include bleeder circuit, the bleeder circuit exports the reference voltage, and makes its voltage value between charge power supply and the voltage value for being electrically charged power supply.Present invention reduces Ripple Noises when power source charges, and data loading density can be improved, and improve communication data transfer efficiency.
Description
Technical field
The invention belongs to electronic communication fields, are related to a kind of communication charging equipment, and in particular to a kind of vehicular communication equipment
Multiple step format charger.
Background technique
In electronic equipment of various, different modules usually requires different DC power supplies, usually by a DC power supply
It is charged to other power supplys to obtain the DC power supply of different potentials.For communication equipment, with power consumption and signal voltage width
The reduction of degree, it is smaller and smaller for the noise signal tolerance of system, when especially power supply noise is superimposed upon on signal, for letter
Number distortion influence embody more and more significant influence with the reduction of supply voltage.In vehicle-mounted communication equipment, due to
Power supply itself is converted by mechanical energy, and power supply itself oneself has stronger ripple, and in communication frequency height, information density is big
When communication, influence of noise is more severe.
Summary of the invention
To reduce distorted signals caused by power supply noise is superimposed upon on signal of communication, the invention discloses a kind of vehicle-carrying communications
Equipment multiple step format charger.
Vehicular communication equipment multiple step format charger of the present invention, vehicular communication equipment multiple step format charger, including charging
Power supply is electrically charged power supply and reference voltage, further includes level-one charging module and second level charging module；
The level-one charging module includes the first operational amplifier, the first charging device, first operational amplifier
Output end connects the first charging device control terminal, and the input terminal of first charging device connects charge power supply, output end connection
The positive input of the reverse input end of first operational amplifier, first operational amplifier connects reference voltage, further includes
The current-limiting resistance being connected between the first charging device output end and ground；
The second level charging module includes second operational amplifier, the second charging device, the second operational amplifier
Output end connects the second charging device control terminal, and the input terminal of second charging device and the forward direction of second operational amplifier are defeated
Enter the output end of the first charging device of end connection；The output end of second charging device and the reverse input end of second operational amplifier
And it is electrically charged power supply connection；
The output end of first charging device and the second charging device is connected separately with the first capacitor of other end ground connection
With the second capacitor；
It further include bleeder circuit, the bleeder circuit exports the reference voltage, and its voltage value is made to be located at charge power supply
And it is electrically charged between the voltage value of power supply.
Preferably, the bleeder circuit is resistance string, and resistance string both ends are separately connected charge power supply and are electrically charged power supply, electricity
The inside arbitrary node for hindering string is exported as reference voltage.
Preferably, first charging device and/or the second charging device are NMOS tube.
Preferably, the vehicular communication equipment multiple step format charger further includes pre-charge circuit, the pre-charge circuit
Function are as follows: before the work of first and second operational amplifier, the first charging device output end is precharged to pre-charge pressure, it is described
Pre-charge pressure is between reference voltage and to be electrically charged between voltage value, and after the completion of preliminary filling, the pre-charge circuit is first and the
It is closed before the work of two operational amplifiers.
Further, the bleeder circuit further includes pre-charge pressure output end, and the pre-charge pressure output end exports pre-
Charging voltage value is between reference voltage and the voltage value for being electrically charged power supply；The pre-charge circuit by third operational amplifier,
Timer and switching device composition, the positive input of the third operational amplifier connects pre-charge pressure output end, reversed defeated
Enter end connection third operational amplifier output terminal and switching device input terminal, the switching device output end connects the first charger
The control terminal of the output end of part, the switching device is connect with timer, and the timer opens switching device after the power-up, and
Device is turned off the switch after preset time period.
Using vehicular communication equipment multiple step format charger of the present invention, it is applied to during DC charging, it will be primary
Charging is divided into charging process twice, reduces Ripple Noise when power source charges, at the same medium voltage follow be electrically charged voltage by
Gradually rise, charging voltage difference amplitude linearity reduces, and voltage change process steadily without mutation, further reduces system noise and logarithm
It is believed that the secondary interference of breath can be improved data loading density, also improved communication data transfer due to the reduction of power supply ripple
Efficiency.
Detailed description of the invention
Fig. 1 is a kind of specific implementation application mode schematic diagram of vehicular communication equipment multiple step format charger of the present invention；
Fig. 2 is a kind of specific embodiment schematic diagram of bleeder circuit of the present invention；
Appended drawing reference title in figure are as follows: VH- charge power supply, VL- are electrically charged power supply, VP- pre-charge pressure, VM- medium voltage,
VREF- reference voltage, AMP1-the first operational amplifier, AMP2- second operational amplifier, AMP3- third operational amplifier,
The first charging device of M1-, the second charging device of M2-, R1- current-limiting resistance, RL- load, the first divider resistance of R2-, R3- second divide
Piezoresistance, R4- third divider resistance, C1- first capacitor, the second capacitor of C2-, K- switching device.
Specific embodiment
With reference to the accompanying drawing, specific embodiments of the present invention will be described in further detail.
A kind of vehicular communication equipment multiple step format charger of the present invention, including charge power supply, it is electrically charged power supply and benchmark
Voltage further includes level-one charging module and second level charging module；
The level-one charging module includes the first operational amplifier, the first charging device, first operational amplifier
Output end connects the first charging device control terminal, and the input terminal of first charging device connects charge power supply, output end connection
The positive input of the reverse input end of first operational amplifier, first operational amplifier connects reference voltage, further includes
The current-limiting resistance being connected between the first charging device output end and ground；
The second level charging module includes second operational amplifier, the second charging device, the second operational amplifier
Output end connects the second charging device control terminal, and the input terminal of second charging device and the forward direction of second operational amplifier are defeated
Enter the output end of the first charging device of end connection；The output end of second charging device and the reverse input end of second operational amplifier
And it is electrically charged power supply connection；
The output end of first charging device and the second charging device is connected separately with the first capacitor of other end ground connection
With the second capacitor；
It further include bleeder circuit, the bleeder circuit exports the reference voltage, and its voltage value is made to be located at charge power supply
And it is electrically charged between the voltage value of power supply.
As shown in Figure 1, it is assumed that charging voltage VH=10, being electrically charged voltage VL initial value is that zero, VREF is predetermined to be (VH+
VL)/2.The type of attachment of VREF=5V under original state, the first operational amplifier AMP1 make its output end voltage level off to just
To input terminal voltage VREF, i.e. the middle voltage VM of the first operational amplifier output terminal is passed through using the first operational amplifier as core
Level-one charging module after, obtained middle voltage VM=5V.
The first capacitor C1 and current-limiting resistance R1 of level-one charging module output end collectively constitute output filter to subtract in Fig. 1
Few output ripple.Current-limiting resistance R1 can also limit the maximum current of the first charging device M1 simultaneously, and device is avoided to damage, and first
Storage capacitor of the capacitor C1 as middle voltage VM.
Second level charging module charges to the second capacitor C2 using middle voltage VM as power supply, second operational amplifier
AMP2 is identical as the connection type of the first operational amplifier AMP1, and second operational amplifier is played with load resistance RL fills in level-one
The effect of current-limiting resistance R1 in electric module.
It is preferable to use the stronger NMOS devices of current capacity under same area for charging device in two charging modules.
Second level charging module approaches the voltage value for being electrically charged voltage VL towards the voltage value of VM.
For generating reference voltage VREF, key is to make its voltage value moment between charging voltage VH and quilt bleeder circuit
Between charging voltage VL, so that VREF be allow to rise with VL and rise, and declines with VH and decline.
Fig. 2 provides a kind of normal method of bleeder circuit, is connected in series with divider resistance, is marked by the way that VREF in Fig. 2 is arranged
Infuse the resistance proportion at node both ends, the different functions relationship of available VREF and VH and VL.Such as the first partial pressure electricity
Hinder the typical case that R2 is equal to the sum of second divider resistance R3 and third divider resistance R4, VREF=(VH+VL)/2.
Illustrate charging process of the invention below,
For VH=10V, the original state of VL=0V, VREF=VM=5V at this time, but when VL is charged to 1V, at this time VREF
=(10+1)/2=5.5V, steady state voltage of the VM in level-one charging module at this time is 5.5V, for being electrically charged voltage VL=1V
State, pressure difference remains within 4.5V or so.
When VL is charged to 2V, VREF=(10+2)/2=6V, i.e. VREF=6V, VM can be charged to 6V at this time, at this point for
It is electrically charged the state of voltage VL=2V, pressure difference maintains 4V or so.
It is closer to VH when VL is charged to, such as when 9V, VREF=(10+9)/2=9.5V, VM can be charged to 9.5V at this time, this
When for being electrically charged the state of voltage VL=9V, pressure difference maintains 0.5V or so.
It is enumerated and is not difficult to find out by the above state, in the present invention, using two-stage charging mode, complete basic charge function
While rising to VL persistently constantly close to VH, at level-one charging module, the pressure difference of middle voltage VM and charging voltage VH；
And at second level charging module, middle voltage VM and the pressure difference for being electrically charged voltage VL are limited in the range less than VH-VL
It is interior, to actually reduce under traditional level-one charge mode, cause power supply output high current since pressure difference is excessive and easy to form
The phenomenon that larger ripple.Two-stage charged form is utilized simultaneously, so that output stage device can choose the lower low-voltage device of pressure voltage
Part, reduces the pressure-resistant technique of entire IC chip, to avoid using expensive high-voltage chip processing procedure, with more cheap
Low pressure process completes During high voltage charge, saves manufacturing cost.
Medium voltage, which follows, to be electrically charged voltage and is gradually increasing, and charging voltage difference amplitude linearity reduces, and voltage change process is steady
Without mutation, further reduces system noise and the secondary interference of data information can be improved due to the reduction of power supply ripple
Data loading density also improves communication data transfer efficiency.
Specific embodiment shown in Fig. 1, gives a preferred embodiment of the invention, and the vehicle-carrying communication is set
Standby multiple step format charger further includes pre-charge circuit, the function of the pre-charge circuit are as follows: in first and second operational amplifier
Before work, the first charging device output end is precharged to pre-charge pressure, the pre-charge pressure is between reference voltage and to be filled
Between piezoelectric voltage value, after the completion of preliminary filling, the pre-charge circuit is closed before first and second operational amplifier works.
A specific embodiment of pre-charge circuit is given in Fig. 1, the bleeder circuit further includes that pre-charge pressure is defeated
Outlet, the precharging voltage value of the pre-charge pressure output end output is between reference voltage and the voltage value for being electrically charged power supply；
The pre-charge circuit is made of third operational amplifier AMP3, timer and switching device, the third operational amplifier
Positive input connects pre-charge pressure output end, and reverse input end connects third operational amplifier output terminal and switching device K is defeated
Enter end, the switching device output end connects the output end of the first charging device, the control terminal and timer of the switching device
Connection, the timer opens switching device K after the power-up, and device is turned off the switch after preset time period.
Timer after the power-up, opens switching device, while bleeder circuit generates pre-charge pressure, third operational amplifier is pressed
It charges according to precharging voltage value to output end, the connection type of third operational amplifier exports third operational amplifier to it
The steady state voltage of end precharge is precharging voltage value, but in the present invention, does not need to continue working third operational amplifier
To precharging voltage value is charged to, as long as rising to the end VM voltage near precharging voltage value by the charging process of preset time period
, naturally it is also possible to it fills and sets precharging voltage value.
It is arranged using pre-charge circuit, for the end VM voltage pre-charge to certain level, is reduced from charging voltage VH to VM
Absolute pressure difference when the charging of end, to reduce ripple, simultaneously for level-one charging module, power device is when continuing working
Difference of the maximum differential pressure between the voltage after charging voltage VH and precharge, precharge behavior is practical to reduce the difference, from
And the power device part of level-one charging module is allow to reduce core all using the integrated circuit fabrication process of lower voltage
Piece manufacturing cost.Switching device can be MOS, triode or transmission gate etc..
Previously described is each preferred embodiment of the invention, if the preferred embodiment in each preferred embodiment
It is not obvious contradictory or premised on a certain preferred embodiment, each preferred embodiment can any stack combinations
Use, the design parameter in the embodiment and embodiment only for the purpose of clearly stating the inventor's invention verification process, and
It is non-to limit scope of patent protection of the invention, scope of patent protection of the invention is still subject to the claims, all
It is that similarly should be included in protection model of the invention with the variation of equivalent structure made by specification and accompanying drawing content of the invention
In enclosing.
Claims (4)
1. vehicular communication equipment multiple step format charger, including charge power supply, it is electrically charged power supply and reference voltage, which is characterized in that
It further include level-one charging module and second level charging module；
The level-one charging module includes the first operational amplifier, the first charging device, the output of first operational amplifier
The first charging device control terminal of end connection, the input terminal of first charging device connect charge power supply, output end connection first
The positive input of the reverse input end of operational amplifier, first operational amplifier connects reference voltage, further includes connection
Current-limiting resistance between the first charging device output end and ground；
The second level charging module includes second operational amplifier, the second charging device, the output of the second operational amplifier
The second charging device control terminal of end connection, the input terminal of second charging device and the positive input of second operational amplifier
Connect the output end of the first charging device；The output end of second charging device and the reverse input end of second operational amplifier and by
Charge power supply connection；
The output end of first charging device and the second charging device is connected separately with the first capacitor and the of other end ground connection
Two capacitors；
Further include bleeder circuit, the bleeder circuit exports the reference voltage, and make its voltage value be located at charge power supply and by
Between the voltage value of charge power supply；
The vehicular communication equipment multiple step format charger further includes pre-charge circuit, the function of the pre-charge circuit are as follows:
One and second operational amplifier work before, the first charging device output end is precharged to pre-charge pressure, the pre-charge pressure is
Between reference voltage and the voltage value for being electrically charged power supply, after the completion of preliminary filling, the pre-charge circuit is in first and second fortune
It is closed before calculating amplifier operation.
2. vehicular communication equipment multiple step format charger as described in claim 1, which is characterized in that the bleeder circuit is resistance
String, resistance string both ends are separately connected charge power supply and are electrically charged power supply, and the inside arbitrary node of resistance string is defeated as reference voltage
Out.
3. vehicular communication equipment multiple step format charger as described in claim 1, which is characterized in that first charging device
And/or second charging device be NMOS tube.
4. vehicular communication equipment multiple step format charger as described in claim 1, which is characterized in that the bleeder circuit further includes
The precharging voltage value of pre-charge pressure output end, the pre-charge pressure output end output is located at reference voltage and is electrically charged the electricity of power supply
Between pressure value；The pre-charge circuit is made of third operational amplifier, timer and switching device, the third operation amplifier
The positive input of device connects pre-charge pressure output end, and reverse input end connects third operational amplifier output terminal and switching device
Input terminal, the switching device output end connect the output end of the first charging device, the control terminal and timing of the switching device
Device connection, the timer opens switching device after the power-up, and device is turned off the switch after preset time period.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610413335.5A CN105978077B (en) | 2016-06-14 | 2016-06-14 | Vehicular communication equipment multiple step format charger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610413335.5A CN105978077B (en) | 2016-06-14 | 2016-06-14 | Vehicular communication equipment multiple step format charger |
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| Publication Number | Publication Date |
|---|---|
| CN105978077A CN105978077A (en) | 2016-09-28 |
| CN105978077B true CN105978077B (en) | 2019-01-08 |
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| CN201610413335.5A Active CN105978077B (en) | 2016-06-14 | 2016-06-14 | Vehicular communication equipment multiple step format charger |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112910039A (en) * | 2021-01-27 | 2021-06-04 | 维沃移动通信有限公司 | Power conversion device and charging system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7919954B1 (en) * | 2006-10-12 | 2011-04-05 | National Semiconductor Corporation | LDO with output noise filter |
| CN102681584A (en) * | 2012-05-30 | 2012-09-19 | 昆山锐芯微电子有限公司 | Low noise bandgap reference circuit and reference source generation system |
-
2016
- 2016-06-14 CN CN201610413335.5A patent/CN105978077B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7919954B1 (en) * | 2006-10-12 | 2011-04-05 | National Semiconductor Corporation | LDO with output noise filter |
| CN102681584A (en) * | 2012-05-30 | 2012-09-19 | 昆山锐芯微电子有限公司 | Low noise bandgap reference circuit and reference source generation system |
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| Publication number | Publication date |
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| CN105978077A (en) | 2016-09-28 |
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Effective date of registration: 20181119 Address after: Room 608, Block J, Haitai Green Industrial Base, No. 6 Haitai Development Six Road, Huayuan Industrial Zone, Nankai District, Tianjin Applicant after: Tianjin Puxun Power Information Technology Co., Ltd. Applicant after: STATE GRID INFORMATION & TELECOMMUNICATION GROUP CO., LTD. Address before: 610000 No. 4-302, No. 3 South Third Section of Second Ring Road, Wuhou District, Chengdu City, Sichuan Province Applicant before: Luo Yanping |
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