CN102724608A - Central processing unit (CPU) power supply circuit of car audio - Google Patents
Central processing unit (CPU) power supply circuit of car audio Download PDFInfo
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- CN102724608A CN102724608A CN2012102249429A CN201210224942A CN102724608A CN 102724608 A CN102724608 A CN 102724608A CN 2012102249429 A CN2012102249429 A CN 2012102249429A CN 201210224942 A CN201210224942 A CN 201210224942A CN 102724608 A CN102724608 A CN 102724608A
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Abstract
The invention relates to a central processing unit (CPU) power supply circuit of a car audio, and the CPU power supply circuit is characterized in that a power supply circuit of a CPU pull-up resistor and a power supply circuit of a CPU air control center (ACC) detection pin are powered by a car ignition wire, a CPU power supply virtual drive device (VDD) power supply circuit is powered by a car battery, so that when the car audio stays at a standby status, the power supply circuit of the CPU pull-up resistor and the power supply circuit of the CPU ACC detection pin do not need the voltage and current, and the power consumption of the car battery can be saved.
Description
Technical field
The present invention relates to automobile audio, specifically be meant a kind of CPU power supply circuits of automobile audio.
Background technology
In the prior art; The CPU power supply circuits of automobile audio comprise that CPU ACC detects the power supply circuits of pin, power supply circuits and the CPU pull-up resistor power supply circuits of cpu power VDD; The power supply circuits that CPU ACC detects pin provide power supply through automobile ignition wire, and the power supply circuits of cpu power VDD and CPU pull-up resistor power supply circuits provide power supply through automobile storage battery.Because the CPU pull-up resistor of the CPU power supply circuits of automobile audio and cpu power VDD provide through same power supply circuits by automobile storage battery; When therefore automobile audio is in holding state; Automobile storage battery also will be given CPU pull-up resistor and cpu power VDD simultaneously; So the power supply circuits power consumption of CPU is big, causes unnecessary waste.
Summary of the invention
It is big to the objective of the invention is to overcome the power supply circuits power consumption that has CPU in the prior art, causes the deficiency and the defective of unnecessary waste, and a kind of CPU power supply circuits of saving the automobile audio of automobile storage battery power consumption are provided.
The objective of the invention is to realize: a kind of CPU power supply circuits of automobile audio through following technical scheme; Comprise through automobile ignition wire providing the CPU ACC of power supply to detect the power supply circuits of pin, power supply circuits and the CPU pull-up resistor power supply circuits of the cpu power VDD of power supply being provided through automobile storage battery that said CPU pull-up resistor power supply circuits provide power supply through automobile ignition wire; The power supply circuits that said CPU ACC detects pin comprise triode Q1; The grounded emitter of said triode Q1; Base stage is connected with the positive pole of voltage stabilizing didoe D1 through resistance R 3; The negative pole of said voltage stabilizing didoe D1 is connected with automobile ignition wire through resistance R 1, and the collector electrode of said triode Q1 meets CPU ACC and detects pin; The power supply circuits of said cpu power VDD comprise voltage stabilizing chip IC 1, and the input of said voltage stabilizing chip IC 1 is connected to automobile storage battery B+ through resistance R 2, and through electric capacity E1 ground connection; Its earth terminal is connected with the positive pole of diode D2, the minus earth of said diode D2, and the capacitor C 1 and E2 ground connection of its output through being connected in parallel is connected with cpu power VDD through diode D3 simultaneously.
Particularly, said CPU pull-up resistor power supply circuits comprise triode Q2, and the base stage of said triode Q2 is connected with the collector electrode of triode Q1, and collector electrode is connected with the output of IC1, and emitter is connected with the CPU pull-up resistor through diode D2; The base stage of said triode Q2 is connected through resistance R 4 with collector electrode simultaneously.
The operation principle of the CPU power supply circuits of automobile audio of the present invention is:
Cpu power VDD provide power supply by automobile storage battery; Automobile storage battery B+ through after resistance R 2 current limlitings by electric capacity E1 filtering; Input to the input of voltage stabilizing chip I C1 again; After voltage stabilizing chip I C1 voltage stabilizing from output output, then through capacitor C 1 and E2 filtering after diode D3 is connected to cpu power VDD; Power supply circuits and CPU pull-up resistor power supply circuits that CPU ACC detects pin provide power supply through automobile ignition wire; Behind the pressure limiting circuit that automobile ignition wire is formed through resistance R 1 and voltage stabilizing didoe D1 by current-limiting resistance R3 current limliting; Push And Release through control triode Q1 behind the current-limiting resistance R3 finally obtains CPU ACC detection signal.
When automobile audio is in running order; Triode Q1 is in out state; Voltage, electric current export CPU ACC detection pin to from the collector electrode of triode Q1; Voltage, electric current process resistance R 4 are input to the collector electrode of triode Q2 simultaneously, and the emitter output by triode Q2 is connected to the CPU pull-up resistor through diode D4 again;
When automobile audio is in holding state, the automobile ignition wire outage, triode Q1 is in off status, and this moment, cpu power VDD and CPU pull-up resistor did not need voltage, electric current.
The invention compares that prior art has the following advantages and beneficial effect: the power supply circuits that power supply circuits and the CPU ACC of the present invention through designs C PU pull-up resistor detects pin provide power supply, cpu power VDD power supply circuits by automobile storage battery power supply to be provided through automobile ignition wire; When making automobile audio be in holding state; The power supply circuits that the power supply circuits of CPU pull-up resistor and CPU ACC detect pin need not provide voltage, electric current, have saved the power consumption of automobile storage battery.
Description of drawings
Fig. 1 is the schematic diagram of the CPU power supply circuits of a kind of automobile audio of the present invention.
Embodiment
Below in conjunction with embodiment and accompanying drawing the present invention is described in further detail, but the execution mode of the invention is not limited thereto.
Embodiment
As shown in Figure 1; A kind of CPU power supply circuits of automobile audio; Comprise through automobile ignition wire providing the CPU ACC of power supply to detect the power supply circuits of pin, power supply circuits and the CPU pull-up resistor power supply circuits of the cpu power VDD of power supply being provided through automobile storage battery that said CPU pull-up resistor power supply circuits provide power supply through automobile ignition wire.Wherein, The power supply circuits that said CPU ACC detects pin comprise triode Q1; The grounded emitter of said triode Q1; Base stage is connected with the positive pole of voltage stabilizing didoe D1 through resistance R 3, and the negative pole of said voltage stabilizing didoe D1 is connected with automobile ignition wire through resistance R 1, and the collector electrode of said triode Q1 meets CPU ACC and detects pin.The power supply circuits of said cpu power VDD comprise voltage stabilizing chip I C1, and the input of said voltage stabilizing chip I C1 is connected to automobile storage battery B+ through resistance R 2, and through electric capacity E1 ground connection; Its earth terminal is connected with the positive pole of diode D2, the minus earth of said diode D2, and the capacitor C 1 and E2 ground connection of its output through being connected in parallel is connected with cpu power VDD through diode D3 simultaneously.Said CPU pull-up resistor power supply circuits comprise triode Q2, and the base stage of said triode Q2 is connected with the collector electrode of triode Q1, and collector electrode is connected with the output of IC1, and emitter is connected with the CPU pull-up resistor through diode D2; The base stage of said triode Q2 is connected through resistance R 4 with collector electrode simultaneously.
Cpu power VDD provide power supply by automobile storage battery; Automobile storage battery B+ through after resistance R 2 current limlitings by electric capacity E1 filtering; Input to the input of voltage stabilizing chip I C1 again; After voltage stabilizing chip I C1 voltage stabilizing from output output, then through capacitor C 1 and E2 filtering after diode D3 is connected to cpu power VDD; Power supply circuits and CPU pull-up resistor power supply circuits that CPU ACC detects pin provide power supply through automobile ignition wire; Behind the pressure limiting circuit that automobile ignition wire is formed through resistance R 1 and voltage stabilizing didoe D1 by current-limiting resistance R3 current limliting; Push And Release through control triode Q1 behind the current-limiting resistance R3 finally obtains CPU ACC detection signal.
When automobile audio is in running order; Triode Q1 is in out state; Voltage, electric current export CPU ACC detection pin to from the collector electrode of triode Q1; Voltage, electric current process resistance R 4 are input to the collector electrode of triode Q2 simultaneously, and the emitter output by triode Q2 is connected to the CPU pull-up resistor through diode D4 again;
When automobile audio is in holding state, the automobile ignition wire outage, triode Q1 is in off status, and this moment, cpu power VDD and CPU pull-up resistor did not need voltage, electric current.
The present invention provides power supply, cpu power VDD power supply circuits by automobile storage battery power supply to be provided through the power supply circuits of designs C PU pull-up resistor and the power supply circuits of CPU ACC detection pin through automobile ignition wire; When making automobile audio be in holding state; The power supply circuits that the power supply circuits of CPU pull-up resistor and CPU ACC detect pin need not provide voltage, electric current, have saved the power consumption of automobile storage battery.
The above embodiment has only expressed execution mode of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to claim of the present invention.Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from the present invention's design, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection range of patent of the present invention should be as the criterion with accompanying claims.
Claims (2)
1. the CPU power supply circuits of an automobile audio; It is characterized in that: comprise through automobile ignition wire providing the CPU ACC of power supply to detect the power supply circuits of pin, power supply circuits and the CPU pull-up resistor power supply circuits of the cpu power VDD of power supply being provided through automobile storage battery that said CPU pull-up resistor power supply circuits provide power supply through automobile ignition wire; The power supply circuits that said CPU ACC detects pin comprise triode Q1; The grounded emitter of said triode Q1; Base stage is connected with the positive pole of voltage stabilizing didoe D1 through resistance R 3; The negative pole of said voltage stabilizing didoe D1 is connected with automobile ignition wire through resistance R 1, and the collector electrode of said triode Q1 meets CPUACC and detects pin, and it is characterized in that: the power supply circuits of said cpu power VDD comprise voltage stabilizing chip IC 1; The input of said voltage stabilizing chip IC 1 is connected to automobile storage battery B+ through resistance R 2, and through electric capacity E1 ground connection; Its earth terminal is connected with the positive pole of diode D2, the minus earth of said diode D2, and the capacitor C 1 and E2 ground connection of its output through being connected in parallel is connected with cpu power VDD through diode D 3 simultaneously.
2. according to the CPU power supply circuits of the said automobile audio of claim 1; It is characterized in that: said CPU pull-up resistor power supply circuits; Comprise triode Q2; The base stage of said triode Q2 is connected with the collector electrode of triode Q1, and collector electrode is connected with the output of IC1, and emitter is connected with the CPU pull-up resistor through diode D2; The base stage of said triode Q2 is connected through resistance R 4 with collector electrode simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102249429A CN102724608A (en) | 2012-06-29 | 2012-06-29 | Central processing unit (CPU) power supply circuit of car audio |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102249429A CN102724608A (en) | 2012-06-29 | 2012-06-29 | Central processing unit (CPU) power supply circuit of car audio |
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| CN102724608A true CN102724608A (en) | 2012-10-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012102249429A Pending CN102724608A (en) | 2012-06-29 | 2012-06-29 | Central processing unit (CPU) power supply circuit of car audio |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110254379A (en) * | 2019-07-09 | 2019-09-20 | 四川朗勃科技有限公司 | Automobile multimedia device, which does not power off, does not restart circuit main board |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1991656A (en) * | 2005-12-30 | 2007-07-04 | 深圳创维－Rgb电子有限公司 | CPU electric supply circuit of automobile sound equipment |
| CN202180794U (en) * | 2011-08-17 | 2012-04-04 | 深圳创维－Rgb电子有限公司 | Vehicle-mounted standby circuit and vehicle-mounted equipment |
-
2012
- 2012-06-29 CN CN2012102249429A patent/CN102724608A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1991656A (en) * | 2005-12-30 | 2007-07-04 | 深圳创维－Rgb电子有限公司 | CPU electric supply circuit of automobile sound equipment |
| CN202180794U (en) * | 2011-08-17 | 2012-04-04 | 深圳创维－Rgb电子有限公司 | Vehicle-mounted standby circuit and vehicle-mounted equipment |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110254379A (en) * | 2019-07-09 | 2019-09-20 | 四川朗勃科技有限公司 | Automobile multimedia device, which does not power off, does not restart circuit main board |
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Application publication date: 20121010 |