CN105720678A - Low cost and low power consumption capacitive RTC freewheeling circuit - Google Patents
Low cost and low power consumption capacitive RTC freewheeling circuit Download PDFInfo
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- CN105720678A CN105720678A CN201610177765.1A CN201610177765A CN105720678A CN 105720678 A CN105720678 A CN 105720678A CN 201610177765 A CN201610177765 A CN 201610177765A CN 105720678 A CN105720678 A CN 105720678A
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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
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/061—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for DC powered loads
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/03—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/08—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes without control electrode or semiconductor devices without control electrode
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0083—Converters characterised by their input or output configuration
- H02M1/009—Converters characterised by their input or output configuration having two or more independently controlled outputs
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/92—Energy efficient charging or discharging systems for batteries, ultracapacitors, supercapacitors or double-layer capacitors specially adapted for vehicles
Abstract
The invention discloses a low cost and low power consumption capacitive RTC freewheeling circuit, and belongs to the field of automobile circuit control. Through adoption of the circuit provided by the invention, the problem that a driving recorder cannot accurately record driving data when a vehicle power supply is damaged is solved. The circuit provided by the invention comprises a multi-direct current power supply module, an energy storage module, an RTC power supply module and a CPU power supply module. The multi-direct current power supply module imports a +5V direct current power supply according to a key igniter in a starting state, produces a +4.7V direct current power supply for the energy storage module and the CPU power supply module and produces a +3.9V direct current power supply for the RTC power supply module. The multi-direct current power supply module comprises a diode RD1 and a diode RD2. The anode of the diode RD1 is connected with the +5V direct current power supply; the cathode of the diode RD1 produces the +4.7V direct current power supply and is connected with the anode of the diode RD2; and the cathode of the diode RD2 produces the +3.9V direct current power supply.
Description
Technical field
The invention belongs to automobile circuit control field.
Background technology
Drive recorder is under any environment of running car, all should be able to record current travelling data.But when accident produce while, the power supply on car is damaged, and monitor is not powered, just cannot record, cause Partial key loss of data.The judgement accident details thus having no way of.
It addition, monitor is when key fire is closed, it is not intended for electrical environment, but the temporal information within monitor can not be lost, otherwise just cannot accurate recording travelling data.
Summary of the invention
The invention aims to solve drive recorder cannot the problem of accurate recording travelling data when vehicle power damages, it is provided that one low cost low-power consumption condenser type RTC freewheeling circuit.
Low cost low-power consumption condenser type RTC freewheeling circuit of the present invention, it includes many DC power suppliers, energy storage module, RTC power supply module and cpu power supply module；Many DC power suppliers introduce+5V DC source according to the key fire of opening；And generate+4.7V DC source to energy storage module and cpu power supply module, generate+3.9V DC source to RTC power supply module；
Many DC power suppliers include the anode of diode RD1 and diode RD2, diode RD1 and access+5V DC source；Negative electrode generation+4.7V the DC source of diode RD1, and connect the anode of diode RD2, the negative electrode of diode RD2 generates+3.9V DC source；
Energy storage module includes electrochemical capacitor C1, electrochemical capacitor C2, resistance R1 and resistance R2；The positive pole of electrochemical capacitor C1 and one end of resistance R1 are simultaneously connected with+4.7V DC source, the negative pole of electrochemical capacitor C2 and one end of resistance R2 ground connection simultaneously；The negative pole of electrochemical capacitor C1 is simultaneously connected with the other end of the positive pole of electrochemical capacitor C2, the other end of resistance R1 and resistance R2；
RTC power supply module includes diode RD3, Zener diode RD4, resistance R3 and electric capacity C3；The anode of diode RD3 accesses+3.9V DC source, and the negative electrode of diode RD3 connects one end of resistance R3, and the other end of resistance R3 is simultaneously connected with the negative electrode of Zener diode RD4 and one end of electric capacity C3, and connects the power pins of RTC chip as RTC power supply；The plus earth of Zener diode RD4；The other end ground connection of electric capacity C3；
Cpu power supply module includes blood pressure lowering chip KU1, diode RD5, resistance R4, resistance R5, electric capacity C4, electric capacity C5, electric capacity C6, electric capacity C7 and electric capacity C8；The power input pin of blood pressure lowering chip KU1 is simultaneously connected with one end of+4.7V DC source, one end of electric capacity C4 and electric capacity C6, the other end ground connection of electric capacity C4, the other end ground connection of electric capacity C6；The Enable Pin of blood pressure lowering chip KU1 is simultaneously connected with the negative electrode of one end of resistance R5, one end of resistance R4 and diode RD5, the other end of resistance R5 connects+5V DC source, the other end ground connection of resistance R4, the anode of diode RD5 is M_SUT3V3 shutdown signal input, CPU control to set low M_SUT3V3 to close blood pressure lowering chip KU1；The bypass pin of blood pressure lowering chip KU1 passes through electric capacity C7 ground connection；The output pin of blood pressure lowering chip KU1 is simultaneously connected with one end of electric capacity C5 and one end of electric capacity C8, the other end ground connection of electric capacity C5, the other end ground connection of electric capacity C8；Blood pressure lowering chip KU1 exports 3.3V DC source as cpu power, powers for CPU.
Advantages of the present invention: circuit structure of the present invention is simple, it it is a kind of circuit with low cost, can power to systems stay after a loss of power, at least maintain 1s (this time enough system log (SYSLOG) current datas), and ensure the hardware circuit that internal RTC time is not lost.
Circuit cost of the present invention is low to moderate 6 yuan.
Accompanying drawing explanation
Fig. 1 is the physical circuit figure of low cost low-power consumption condenser type RTC freewheeling circuit of the present invention.
Detailed description of the invention
Detailed description of the invention one: present embodiment is described below in conjunction with Fig. 1, low cost low-power consumption condenser type RTC freewheeling circuit described in present embodiment, it includes many DC power suppliers, energy storage module, RTC power supply module and cpu power supply module；Many DC power suppliers introduce+5V DC source according to the key fire of opening；And generate+4.7V DC source to energy storage module and cpu power supply module, generate+3.9V DC source to RTC power supply module；
Many DC power suppliers include the anode of diode RD1 and diode RD2, diode RD1 and access+5V DC source；Negative electrode generation+4.7V the DC source of diode RD1, and connect the anode of diode RD2, the negative electrode of diode RD2 generates+3.9V DC source；
Energy storage module includes electrochemical capacitor C1, electrochemical capacitor C2, resistance R1 and resistance R2；The positive pole of electrochemical capacitor C1 and one end of resistance R1 are simultaneously connected with+4.7V DC source, the negative pole of electrochemical capacitor C2 and one end of resistance R2 ground connection simultaneously；The negative pole of electrochemical capacitor C1 is simultaneously connected with the other end of the positive pole of electrochemical capacitor C2, the other end of resistance R1 and resistance R2；
RTC power supply module includes diode RD3, Zener diode RD4, resistance R3 and electric capacity C3；The anode of diode RD3 accesses+3.9V DC source, and the negative electrode of diode RD3 connects one end of resistance R3, and the other end of resistance R3 is simultaneously connected with the negative electrode of Zener diode RD4 and one end of electric capacity C3, and connects the power pins of RTC chip as RTC power supply；The plus earth of Zener diode RD4；The other end ground connection of electric capacity C3；
Cpu power supply module includes blood pressure lowering chip KU1, diode RD5, resistance R4, resistance R5, electric capacity C4, electric capacity C5, electric capacity C6, electric capacity C7 and electric capacity C8；The power input pin of blood pressure lowering chip KU1 is simultaneously connected with one end of+4.7V DC source, one end of electric capacity C4 and electric capacity C6, the other end ground connection of electric capacity C4, the other end ground connection of electric capacity C6；The Enable Pin of blood pressure lowering chip KU1 is simultaneously connected with the negative electrode of one end of resistance R5, one end of resistance R4 and diode RD5, the other end of resistance R5 connects+5V DC source, the other end ground connection of resistance R4, the anode of diode RD5 is M_SUT3V3 shutdown signal input, CPU control to set low M_SUT3V3 to close blood pressure lowering chip KU1；The bypass pin of blood pressure lowering chip KU1 passes through electric capacity C7 ground connection；The output pin of blood pressure lowering chip KU1 is simultaneously connected with one end of electric capacity C5 and one end of electric capacity C8, the other end ground connection of electric capacity C5, the other end ground connection of electric capacity C8；Blood pressure lowering chip KU1 exports 3.3V DC source as cpu power, powers for CPU.
Diode RD1 adopts model to be the Schottky tube of SS36, and diode RD2 adopts S3M paster commutation diode.
Operation principle:
1, after system electrification, first one group of series capacitance charging is given by+5V by RD1.The purpose of capacitances in series is to increase the pressure voltage of electric capacity, and electric capacity pressure voltage selected at present is 2.7V, it is impossible to access the voltage of+4V7.But after series connection, the dividing potential drop on each electric capacity is at about 2.4V.The effect of R1 and R2 is to regulate discharge and recharge balance, according to voltage divider principle, after balance, it is possible to by voltage-regulation on the voltage of+4V7 half.
2 ,+5V power supply is powered to KU1 by RD2 generation+4.7V DC source.KU1 is blood pressure lowering chip, and+4.7V voltage is dropped to 3.3V, thus powering to CPU.C4, C5, C6, C8 are filter actions, and the effect of C7 is to ensure that feedback signal is stably smooth (needs of KU1 chip).
3, when the unexpected power-off in outside ,+5V loss of voltage, the electricity of C1, C2 storage can continue through RD2 and power to KU1, can support CPU minimum operating 1s, enough storage line car datas by calculating with the capacity of actual measurement 1.1 farads.
4, when key fire is closed, CPU controls " M_SHUT3V3 " and sets low, and having no progeny thus turning off KU1, KU1 pass, decreasing the kwh loss to C1, C2.+ 4V7 is powered to RTC power supply by RD2, RD3, R3, it is ensured that clock data.As long as the operating current 0.9uA of the RTC of selected CPU, by calculating and actual measurement, R3 resistance selection 1M (to ensure minimum power consumption, also to ensure that RTC system can be normal).The effect of C3 is filtering.The effect of RD4 is that protection enters the voltage of RTC lower than 4.7V.
By calculating and actual measurement, electric current is powered to RTC by RD2, RD3, R3, it is possible to achieve after outside power-off, the clock of 15 days preserves.
Claims (2)
1. low cost low-power consumption condenser type RTC freewheeling circuit, it is characterised in that it includes many DC power suppliers, energy storage module, RTC power supply module and cpu power supply module；Many DC power suppliers introduce+5V DC source according to the key fire of opening；And generate+4.7V DC source to energy storage module and cpu power supply module, generate+3.9V DC source to RTC power supply module；
Many DC power suppliers include the anode of diode RD1 and diode RD2, diode RD1 and access+5V DC source；Negative electrode generation+4.7V the DC source of diode RD1, and connect the anode of diode RD2, the negative electrode of diode RD2 generates+3.9V DC source；
Energy storage module includes electrochemical capacitor C1, electrochemical capacitor C2, resistance R1 and resistance R2；The positive pole of electrochemical capacitor C1 and one end of resistance R1 are simultaneously connected with+4.7V DC source, the negative pole of electrochemical capacitor C2 and one end of resistance R2 ground connection simultaneously；The negative pole of electrochemical capacitor C1 is simultaneously connected with the other end of the positive pole of electrochemical capacitor C2, the other end of resistance R1 and resistance R2；
RTC power supply module includes diode RD3, Zener diode RD4, resistance R3 and electric capacity C3；The anode of diode RD3 accesses+3.9V DC source, and the negative electrode of diode RD3 connects one end of resistance R3, and the other end of resistance R3 is simultaneously connected with the negative electrode of Zener diode RD4 and one end of electric capacity C3, and connects the power pins of RTC chip as RTC power supply；The plus earth of Zener diode RD4；The other end ground connection of electric capacity C3；
Cpu power supply module includes blood pressure lowering chip KU1, diode RD5, resistance R4, resistance R5, electric capacity C4, electric capacity C5, electric capacity C6, electric capacity C7 and electric capacity C8；The power input pin of blood pressure lowering chip KU1 is simultaneously connected with one end of+4.7V DC source, one end of electric capacity C4 and electric capacity C6, the other end ground connection of electric capacity C4, the other end ground connection of electric capacity C6；The Enable Pin of blood pressure lowering chip KU1 is simultaneously connected with the negative electrode of one end of resistance R5, one end of resistance R4 and diode RD5, the other end of resistance R5 connects+5V DC source, the other end ground connection of resistance R4, the anode of diode RD5 is M_SUT3V3 shutdown signal input, CPU control to set low M_SUT3V3 to close blood pressure lowering chip KU1；The bypass pin of blood pressure lowering chip KU1 passes through electric capacity C7 ground connection；The output pin of blood pressure lowering chip KU1 is simultaneously connected with one end of electric capacity C5 and one end of electric capacity C8, the other end ground connection of electric capacity C5, the other end ground connection of electric capacity C8；Blood pressure lowering chip KU1 exports 3.3V DC source as cpu power, powers for CPU.
2. low cost low-power consumption condenser type RTC freewheeling circuit according to claim 1, it is characterised in that diode RD1 adopts model to be the Schottky tube of SS36, and diode RD2 adopts S3M paster commutation diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610177765.1A CN105720678A (en) | 2016-03-24 | 2016-03-24 | Low cost and low power consumption capacitive RTC freewheeling circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610177765.1A CN105720678A (en) | 2016-03-24 | 2016-03-24 | Low cost and low power consumption capacitive RTC freewheeling circuit |
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| CN105720678A true CN105720678A (en) | 2016-06-29 |
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| CN201610177765.1A Pending CN105720678A (en) | 2016-03-24 | 2016-03-24 | Low cost and low power consumption capacitive RTC freewheeling circuit |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107705390A (en) * | 2017-10-13 | 2018-02-16 | 深圳市锐驰曼科技发展有限公司 | A kind of low-power consumption standby dormant circuit |
| CN109789803A (en) * | 2016-10-26 | 2019-05-21 | 三星Sdi株式会社 | The battery system of real-time clock including in-line power and power circuit for real-time clock |
| CN111082654A (en) * | 2018-10-19 | 2020-04-28 | 深圳猛犸电动科技有限公司 | Multi-voltage power supply power conversion circuit, vehicle-mounted embedded power supply and power supply system |
| CN113497477A (en) * | 2021-06-25 | 2021-10-12 | 际络科技(上海)有限公司 | Automatic-driving dual-power-supply control system and method |
| US11218002B2 (en) | 2016-10-26 | 2022-01-04 | Samsung Sdi Co., Ltd. | Battery system comprising real-time clock to which power is supplied internally, and power supply circuit for real-time clock |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109789803A (en) * | 2016-10-26 | 2019-05-21 | 三星Sdi株式会社 | The battery system of real-time clock including in-line power and power circuit for real-time clock |
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| CN111082654A (en) * | 2018-10-19 | 2020-04-28 | 深圳猛犸电动科技有限公司 | Multi-voltage power supply power conversion circuit, vehicle-mounted embedded power supply and power supply system |
| CN111082654B (en) * | 2018-10-19 | 2021-04-27 | 深圳猛犸电动科技有限公司 | Multi-voltage power supply power conversion circuit, vehicle-mounted embedded power supply and power supply system |
| CN113497477A (en) * | 2021-06-25 | 2021-10-12 | 际络科技(上海)有限公司 | Automatic-driving dual-power-supply control system and method |
| CN113497477B (en) * | 2021-06-25 | 2022-11-01 | 际络科技(上海)有限公司 | Automatic-driving dual-power-supply control system and method |
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