CN201274535Y - Power supply circuit of mobile television and mobile terminal - Google Patents

Power supply circuit of mobile television and mobile terminal Download PDF

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Publication number
CN201274535Y
CN201274535Y CNU2008201466494U CN200820146649U CN201274535Y CN 201274535 Y CN201274535 Y CN 201274535Y CN U2008201466494 U CNU2008201466494 U CN U2008201466494U CN 200820146649 U CN200820146649 U CN 200820146649U CN 201274535 Y CN201274535 Y CN 201274535Y
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China
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power supply
linear voltage
voltage regulator
mobile
supply circuits
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CNU2008201466494U
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Chinese (zh)
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张鹏程
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Shenzhen Coship Electronics Co Ltd
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Shenzhen Coship Electronics Co Ltd
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Abstract

The utility model is applied to the field of the power-supply circuit, and provides a mobile television power-supply circuit, which comprises a direct-current power source that provides a direct-current voltage, and a first linear voltage stabilizer and a second linear voltage stabilizer which are connected with the direct-current power source and form two power-supply branch circuits, wherein, the first and the second linear voltage stabilizers are of a single-input and double-output form; the mobile television power-supply circuit further comprises an on-off direct-current-direct-current converter that is arranged between the direct-current power source and the second linear voltage stabilizer. The direct-current-direct-current converter is arranged on the power-supply branch circuit of the linear voltage stabilizer and between the linear voltage stabilizer and the direct-current power source, so that the power consumption of the mobile television power-supply circuit is reduced.

Description

A kind of mobile TV power supply circuits and portable terminal
Technical field
The utility model belongs to the power circuit field, relates in particular to a kind of mobile TV power supply circuits and portable terminal.
Background technology
Generally all be integrated with the mobile TV module in the present intelligent mobile terminal, the function of mobile TV is provided to the user.For the mobile TV module, generally need power supply circuits with the direct voltage step-down respectively that battery in the intelligent mobile terminal provides, produce four road supply power voltages, for the work of mobile TV module.
A kind of power supply circuits that prior art provides adopt four switching regulator DC-to-DC converter, produce No. four mobile TV module operating voltages respectively.As Fig. 1 is one tunnel circuit diagram wherein, export after the direct voltage step-down of one switching regulator DC-to-DC converter with input, because the operating frequency of switching regulator DC-to-DC converter is in the video frequency band that the mobile TV module is received, its supply power voltage of directly exporting meeting interference video, therefore, add a LC filter circuit between switching regulator DC-to-DC converter and mobile TV module, its connected mode as shown in Figure 1.But in actual applications, the filter effect of this filter circuit is limited, this is because inductance is connected in the electric power loop, the electric current that flows through inductance is often bigger, if but select the big inductance of large-current electric sensibility reciprocal can cause the inductance volume to have no idea especially greatly to use, therefore, generally select the little inductance of large-current electric sensibility reciprocal for use.Because electric current macrostructure size is also bigger, make that lower frequency is also had certain filter effect, to higher frequency, it is equivalent to an antenna, and space radiation is serious.
For this reason, prior art provides another kind of power supply circuits, and as shown in Figure 2, these power supply circuits adopt four linear voltage regulators, and the direct voltage that battery in the intelligent mobile terminal is provided is exported after being depressurized to definite value respectively.Because the working frequency range of linear voltage regulator is in video frequency band, so itself can not produce interference, do not need filter circuit, but its power consumption is big.For example, when the input value P-VIN of power supply circuits is 4.2V, magnitude of voltage VCC1, VCC2, VCC3 and VCC4 after the step-down output are respectively 2.7V, 3.3V, 1.8V and 1.2V, and every road electric current is 200mA, then:
P (gross power)=4.2*0.2*4=3.36W
Every road load effective power:
P(2.7)＝2.7*0.2＝0.54W
P(3.3)＝3.3*0.2＝0.66W
P(1.8)＝1.8*0.2＝0.36W
P(1.2)＝1.2*0.2＝0.24W
Effective summed horsepower P:
P (effective summed horsepower)=0.54+0.66+0.36+0.25=1.8W
The efficient of these power supply circuits is: (1.8/3.36) * 100%=53.57%
As from the foregoing, when adopting these power supply circuits that the mobile TV module is powered, there is nearly half power to be depleted.
The utility model content
The purpose of this utility model is to provide a kind of mobile TV power supply circuits, is intended to solve the big problem of mobile TV power supply circuits power consumption in the existing intelligent mobile terminal.
The utility model is to realize like this, a kind of mobile TV power supply circuits, comprise the DC power supply that direct voltage is provided, link to each other, constitute first linear voltage regulator and second linear voltage regulator of two power supply branch roads with described DC power supply, described first linear voltage regulator and second linear voltage regulator are for singly going into two forms that go out, and described mobile TV power supply circuits further comprise:
Be connected in the switching regulator DC-to-DC converter between the described DC power supply and second linear voltage regulator.
Another purpose of the present utility model is to provide a kind of mobile TV power supply circuits, comprise the DC power supply that direct voltage is provided, link to each other with described DC power supply, constitute the trilinear pressurizer of four power supply branch roads, the 4th linear voltage regulator, the 5th linear voltage regulator and the 6th linear voltage regulator, described trilinear pressurizer, the 4th linear voltage regulator, the 5th linear voltage regulator and the 6th linear voltage regulator are for singly going into singly to go out form, described mobile TV power supply circuits further comprise a switching regulator DC-to-DC converter, the input of described switching regulator DC-to-DC converter links to each other with described DC power supply, and the output of described switching regulator DC-to-DC converter links to each other with the input of described the 5th linear voltage regulator and the 6th linear voltage regulator.
Another purpose of the present utility model is to provide a kind of mobile TV power supply circuits, comprise the DC power supply that direct voltage is provided, link to each other, constitute the 7th linear voltage regulator, the 8th linear voltage regulator, the 9th linear voltage regulator and the tenth linear voltage regulator of four power supply branch roads with described DC power supply, the 7th linear voltage regulator, the 8th linear voltage regulator, the 9th linear voltage regulator and the tenth linear voltage regulator are for singly going into singly to go out form, and described mobile TV power supply circuits further comprise:
Be connected in the switching regulator DC-to-DC converter between described DC power supply and the 9th linear voltage regulator input.
The utility model also provides a kind of portable terminal of aforesaid arbitrary mobile TV power supply circuits.
The utility model has reduced the power consumption of mobile TV power supply circuits by add the switching regulator DC-to-DC converter on the power supply branch road of linear voltage regulator, between this linear voltage regulator and DC power supply.
Description of drawings
Fig. 1 is the circuit diagram of the mobile TV power supply circuits that provide of prior art;
Fig. 2 is the circuit diagram of the mobile TV power supply circuits that provide of prior art;
Fig. 3 is the structure principle chart of the mobile TV power supply circuits that provide of the utility model first embodiment;
Fig. 4 is the particular circuit configurations figure of Fig. 3 median filter;
Fig. 5 is the circuit diagram of the mobile TV power supply circuits that provide of the utility model first embodiment;
Fig. 6 is the structure principle chart of the mobile TV power supply circuits that provide of the utility model second embodiment;
Fig. 7 is the circuit diagram of the mobile TV power supply circuits that provide of the utility model second embodiment;
Fig. 8 is the theory diagram of the mobile TV power supply circuits that provide of the utility model the 3rd embodiment;
Fig. 9 is the circuit diagram of the mobile TV power supply circuits that provide of the utility model the 3rd embodiment.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer,, the utility model is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
The utility model embodiment adds filter circuit simultaneously by adding the switching regulator DC-to-DC converter between linear voltage regulator and the DC power supply between linear voltage regulator and DC power supply, reduced the power consumption of mobile TV power supply circuits.
Fig. 3 shows the structural principle of the mobile TV power supply circuits that the utility model first embodiment provides.
DC power supply 301 provides the DC input voitage of mobile TV power supply circuits, and imports the input of first linear voltage regulator 302 and the input of switching regulator DC-to-DC converter 303 respectively.Switching regulator DC-to-DC converter 303 is used for DC input voitage copped wave with DC power supply 301 to certain value, is exported to the input of second linear voltage regulator 304 by its output.Wherein, first linear voltage regulator 302 and second linear voltage regulator 304 adopt the form of single input dual output, and first linear voltage regulator 302 and second linear voltage regulator 304 can adopt one or more combination of existing linear voltage regulator, in order to improve the device integrated level, and obtain better voltage regulation result, in the utility model, first linear voltage regulator 302 and second linear voltage regulator 304 all adopt low pressure difference linear voltage regulator (the LowDropout Regulator of single input dual output form, LDO), behind the direct voltage that is used for the DC input voitage copped wave of one-input terminal to mobile TV power supply station is needed, export through the dual output end.In addition, in the utility model embodiment, if through the dual output voltage VCC3 of second linear voltage regulator 304 and VCC4 all less than arbitrary value through the dual output voltage VCC1 and the VCC2 of first linear voltage regulator 302, because the supply power voltage of DC power supply 301 can reduce in time, therefore switching regulator DC-to-DC converter 303 is set on the power supply branch road of second linear voltage regulator 304, promptly being arranged on the output supply power voltage compares with the input direct voltage of DC power supply 301, on the bigger power supply branch road of pressure reduction, during concrete the application, the occasion of direct voltage can be provided continuously in DC power supply 301, switching regulator DC-to-DC converter 303 can be set on the power supply branch road of first linear voltage regulator 302, two switching regulator DC-to-DC converter perhaps be set respectively on the power supply branch road of the power supply branch road of first linear voltage regulator 302 and second linear voltage regulator 304.
In order to overcome of the interference of switching regulator DC-to-DC converter to the mobile TV vision signal, in the utility model embodiment, between the DC power supply 301 and first linear voltage regulator 302, on the power supply branch road of first linear voltage regulator 302, also comprise filter 305; Between the switching regulator DC-to-DC converter 303 and second linear voltage regulator 304, also comprise filter 306.Filter 305 and filter 306 are used for the alternating current component that filtering switching regulator DC-to-DC converter 303 is produced.Fig. 4 shows the particular circuit configurations of Fig. 3 median filter 305 and filter 306.
Filter 305 and filter 306 comprise a multiple tube Q and a filter network that is connected with the base stage of multiple tube Q, and the current collection of multiple tube Q is voltage input end very, launches very voltage output end.In concrete application process, multiple tube Q can also select the combination of other amplifying device or other amplifying device separately for use.Filter network comprises by resistance R, be connected in parallel on first capacitor C 1 at resistance R two ends and one-level π type filter circuit that second capacitor C 2 constitutes and by inductance L, be connected in parallel on second capacitor C 2 at inductance L two ends and the secondary π type filter circuit that the 3rd capacitor C 3 constitutes, two-stage π type filter circuit is by 2 cascades of second capacitor C, and first capacitor C 1 in the one-level π type filter circuit is connected voltage input end with the parallel connected end of resistance R, and the 3rd capacitor C 3 in the secondary π type filter circuit is connected the base stage of multiple tube Q with the parallel connected end of inductance L.Wherein, first capacitor C 1, second capacitor C 2, the 3rd capacitor C 3 can according to circumstances be selected low frequency is had the electrochemical capacitor of better filter effect or high frequency had the ceramic condenser of better filter effect, in order to obtain best filter effect, in the utility model, first capacitor C 1, second capacitor C 2 and the 3rd capacitor C 3 are selected electrochemical capacitor for use, simultaneously, one the 4th capacitor C 4 in parallel at the 3rd capacitor C 3 two ends, it can be a ceramic condenser.
The direct voltage of input input is after the filtering of filter network, by the emitter output of multiple tube Q.Because magnificationfactor=β 1* β 2 of multiple tube Q, thereby the filter effect of the filter circuit of being made up of multiple tube Q and filter network improves β doubly than independent use filter network as the filter effect of filter circuit, promptly be equivalent in filter circuit, add big electric capacity and big inductance, make the most of alternating current component that flows through filter circuit be suppressed.In addition, establish the electric current I of process resistance R and inductance L R, the electric current of being exported by the emitter of multiple tube Q is I Out, I then R=I Out/ (1+ β), promptly flow through resistance R and inductance L electric current be 1/ (the 1+ β) of electric current of input, therefore, can adopt the resistance R of big resistance, cooperate with second capacitor C 2, reduce the ripple component of the voltage at second capacitor C, 2 two ends, optimize the filter effect of filter network.The electric current that flows through inductance L is little, can make the big inductance of inductance value under the little situation of inductance L overall dimension, has reduced the space radiation of inductance L, optimizes the filter effect of wave network equally.
Fig. 5 shows the mobile TV power supply circuits that the utility model first embodiment provides, and it realizes principle as mentioned above, does not repeat them here.
Fig. 6 shows the structural principle of the mobile TV power supply circuits that the utility model second embodiment provides.
First embodiment is different with the utility model, and in the present embodiment, the linear voltage regulator in two power supply branch roads all adopts singly to go into and singly goes out form.With shown in Figure 3 different, on the power supply branch road of first linear voltage regulator 302, adopt two singly to go into linear voltage regulator trilinear pressurizer 601 and the 4th linear voltage regulator 602 replacements first linear voltage regulator 302 that singly goes out form; On the power supply branch road of second linear voltage regulator 304, adopt two singly to go into linear voltage regulator the 5th linear voltage regulator 603 and the 6th linear voltage regulator 604 replacements second linear voltage regulator 304 that singly goes out form.The connected mode of other parts and each one and realization principle do not repeat them here as described in the first embodiment of the present invention.
Fig. 7 shows the mobile TV power supply circuits that the utility model second embodiment provides, and it realizes principle as mentioned above, does not repeat them here.
The power consumption analyzing examples of the power supply circuits that the utility model embodiment is provided below:
With Fig. 6 is example, establishes P-VIN=4.2V among Fig. 6, and the voltage that is produced by first linear voltage regulator 302 is respectively VCC1=2.7V, VCC2=3.3V, the voltage that is produced by second linear voltage regulator 304 is respectively VCC3=1.8V, VCC4=1.2V, every road electric current is 0.2A, every road load effective power:
P (2.7 effective power)=2.7*0.2=0.54W
P (3.3 effective power)=3.3*0.2=0.66W
P (1.8 effective power)=1.8*0.2=0.36W
P (1.2 effective power)=1.2*0.2=0.24W
If the efficient of switching regulator DC-to-DC converter 303 is 90%, then:
P (1.8 effective power)=P (1.8 gross power) * 90%=0.36W can get,
P (1.8 gross power)=0.4W;
P (1.2 effective power)=P (1.8 gross power) * 90%=0.24W can get,
P (1.8 gross power)=0.27W; Then:
P (gross power)=P (2.7 gross power)+P (3.3 gross power)+P (1.8 gross power)+P (1.2 gross power)=4.2*0.2+4.2*0.2+0.4+0.27=2.35W
P (effective summed horsepower)=0.54+0.66+0.36+0.24=1.8W, then the efficient of mobile TV power supply circuits is: P (effective summed horsepower)/P (gross power)=(1.8/2.35) * 100%=76.6%.
That is to say with prior art and compare that the mobile TV power supply circuits that adopt the utility model embodiment to provide can be raised the efficiency greatly, reduce power loss.
Fig. 8 shows the theory diagram of the mobile TV power supply circuits that the utility model the 3rd embodiment provides.
Present embodiment adopts four the single output of single input linear voltage regulators to produce four supply power voltage VCC1, VCC2, VCC3 and VCC4 respectively, and the magnitude of voltage of VCC3 and VCC4 is all greater than the arbitrary value among VCC1 and the VCC2.In order to obtain optimal power, in the present embodiment, the input of the input of the 7th linear voltage regulator 802 and the 8th linear voltage regulator 803 all directly links to each other with DC power supply 801; The input of the 9th linear voltage regulator 804 links to each other with DC power supply 801 by switching regulator DC-to-DC converter 805; The input of the tenth linear voltage regulator 806 links to each other with DC power supply 801 by switching regulator DC-to-DC converter 807, and switching regulator DC-to-DC converter 805 and switching regulator DC-to-DC converter 807 place respectively on the power supply branch road of the 9th linear voltage regulator 804 and the tenth linear voltage regulator 806.When specific implementation, can also as required switching regulator DC-to-DC converter 807 be removed, and the input of the tenth linear voltage regulator 806 is directly linked to each other with DC power supply 801, certainly, change the very little occasion of direct current supply change in voltage in time in DC power supply 801, can also in the arbitrary branch road or two-way branch road in the power supply branch road of the power supply branch road of the 7th linear voltage regulator 802, the 8th linear voltage regulator 803, the switching regulator DC-to-DC converter be set.In addition, can also between DC power supply 801 and the 7th linear voltage regulator 802, filter 808 be set; Between DC power supply 801 and the 8th linear voltage regulator 803, filter 809 is set; Between the first switching regulator DC-to-DC converter 805 and the 9th linear voltage regulator 804, filter 810 is set; Between second switch formula DC-to-DC converter 807 and the tenth linear voltage regulator 806, filter 811 is set.The function of each several part and specific implementation do not repeat them here as described in the utility model first embodiment among Fig. 8.
Fig. 9 shows the physical circuit of the mobile TV power supply circuits that the utility model the 3rd embodiment provides, and it realizes principle as mentioned above, does not repeat them here.
The utility model embodiment also provides a kind of portable terminal that comprises the described mobile TV power supply circuits of as above arbitrary embodiment.
The utility model embodiment has reduced the power consumption of mobile TV power supply circuits by add the switching regulator DC-to-DC converter on the power supply branch road of linear voltage regulator, between this linear voltage regulator and DC power supply.In addition, between this way switch formula DC-to-DC converter and linear voltage regulator, simultaneously between the linear voltage regulator of other each branch road and DC power supply, add filter circuit, the a-c cycle that can the filtering DC-to-DC converter be produced has improved the video quality of mobile TV to the influence of mobile TV video.
The above only is preferred embodiment of the present utility model; not in order to restriction the utility model; all any modifications of within spirit of the present utility model and principle, being done, be equal to and replace and improvement etc., all should be included within the protection range of the present utility model.

Claims (14)

1, a kind of mobile TV power supply circuits, comprise the DC power supply that direct voltage is provided, link to each other, constitute first linear voltage regulator and second linear voltage regulator of two power supply branch roads with described DC power supply, described first linear voltage regulator and second linear voltage regulator are singly goes into pair linear voltage regulator that goes out, it is characterized in that described mobile TV power supply circuits further comprise:
Be connected in the switching regulator DC-to-DC converter between the described DC power supply and second linear voltage regulator.
2, mobile TV power supply circuits as claimed in claim 1 is characterized in that, described mobile TV power supply circuits further comprise:
Be connected in the filter between described switching regulator DC-to-DC converter and described second linear voltage regulator, the input of described filter links to each other with the output of described switching regulator DC-to-DC converter, and the output of described filter links to each other with the input of described second linear voltage regulator.
3, mobile TV power supply circuits as claimed in claim 1 is characterized in that, described mobile TV power supply circuits further comprise:
Be connected in the filter between described DC power supply and described first linear voltage regulator, the input of described filter links to each other with described DC power supply, and the output of described filter links to each other with the input of described first linear voltage regulator.
4, as claim 2 or 3 described mobile TV power supply circuits, it is characterized in that, described filter comprises a multiple tube and the filter network that is connected with multiple tube, the collector electrode of described multiple tube connects described DC power supply, and emitter connects the input of described first linear voltage regulator or the input of described second linear voltage regulator; Described filter network further comprises the one-level π type filter circuit that is made of resistance, first electric capacity that is connected in parallel on described resistance two ends and second electric capacity; The secondary π type filter circuit that constitutes by inductance, second electric capacity that is connected in parallel on described inductance two ends and the 3rd electric capacity; Described one-level π type filter circuit and secondary π type filter circuit are by the second electric capacity cascade, and the 3rd electric capacity links to each other with the base stage of a multiple tube with the parallel connected end of inductance in the described secondary π type filter circuit, and first electric capacity in the described one-level π type filter circuit links to each other with the collector electrode of described multiple tube with the parallel connected end of resistance.
5, mobile TV power supply circuits as claimed in claim 4 is characterized in that, described filter comprises that further one is connected in parallel on the 4th electric capacity at described the 3rd electric capacity two ends.
6, mobile TV power supply circuits as claimed in claim 1 is characterized in that, described mobile TV power supply circuits comprise that further one is connected in the switching regulator DC-to-DC converter between the described DC power supply and first linear voltage regulator.
7, a kind of portable terminal that comprises as claim 1,2,3 or 6 each described mobile TV power supply circuits.
8, a kind of mobile TV power supply circuits, comprise the DC power supply that direct voltage is provided, link to each other with described DC power supply, constitute the trilinear pressurizer of four power supply branch roads, the 4th linear voltage regulator, the 5th linear voltage regulator and the 6th linear voltage regulator, described trilinear pressurizer, the 4th linear voltage regulator, the 5th linear voltage regulator and the 6th linear voltage regulator are the linear voltage regulator of singly going into singly to go out, it is characterized in that, described mobile TV power supply circuits further comprise a switching regulator DC-to-DC converter, the input of described switching regulator DC-to-DC converter links to each other with described DC power supply, and the output of described switching regulator DC-to-DC converter links to each other with the input of described the 5th linear voltage regulator and the 6th linear voltage regulator.
9, mobile TV power supply circuits as claimed in claim 8, it is characterized in that, described mobile TV power supply circuits further comprise a filter, the input of described filter links to each other with the output of described switching regulator DC-to-DC converter, and the output of described filter links to each other with the input of described the 5th linear voltage regulator and the 6th linear voltage regulator.
10, mobile TV power supply circuits as claimed in claim 9, it is characterized in that, described filter comprises a multiple tube and the filter network that is connected with multiple tube, the collector electrode of described multiple tube connects described DC power supply, and emitter connects the input of described trilinear pressurizer and the 4th linear voltage regulator or the input of described the 5th linear voltage regulator and the 6th linear voltage regulator; Described filter network further comprises the one-level π type filter circuit that is made of resistance, first electric capacity that is connected in parallel on described resistance two ends and second electric capacity; The secondary π type filter circuit that constitutes by inductance, second electric capacity that is connected in parallel on described inductance two ends and the 3rd electric capacity; Described one-level π type filter circuit and secondary π type filter circuit are by the second electric capacity cascade, and the 3rd electric capacity links to each other with the base stage of a multiple tube with the parallel connected end of inductance in the described secondary π type filter circuit, and first electric capacity in the described one-level π type filter circuit links to each other with the collector electrode of described multiple tube with the parallel connected end of resistance.
11, a kind of portable terminal that comprises as claim 8,9 or 10 each described mobile TV power supply circuits.
12, a kind of mobile TV power supply circuits, comprise the DC power supply that direct voltage is provided, link to each other, constitute the 7th linear voltage regulator, the 8th linear voltage regulator, the 9th linear voltage regulator and the tenth linear voltage regulator of four power supply branch roads with described DC power supply, the 7th linear voltage regulator, the 8th linear voltage regulator, the 9th linear voltage regulator and the tenth linear voltage regulator are the linear voltage regulator of singly going into singly to go out, it is characterized in that described mobile TV power supply circuits further comprise:
Be connected in the switching regulator DC-to-DC converter between described DC power supply and the 9th linear voltage regulator input.
13, mobile TV power supply circuits as claimed in claim 12, it is characterized in that described mobile TV power supply circuits further comprise and are connected in the filter between described switching regulator DC-to-DC converter and the linear voltage regulator and are connected in filter between described DC power supply and the linear voltage regulator.
14, a kind of portable terminal that comprises as claim 12 or 13 described mobile TV power supply circuits.
CNU2008201466494U 2008-08-19 2008-08-19 Power supply circuit of mobile television and mobile terminal Expired - Fee Related CN201274535Y (en)

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Application Number Priority Date Filing Date Title
CNU2008201466494U CN201274535Y (en) 2008-08-19 2008-08-19 Power supply circuit of mobile television and mobile terminal

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Application Number Priority Date Filing Date Title
CNU2008201466494U CN201274535Y (en) 2008-08-19 2008-08-19 Power supply circuit of mobile television and mobile terminal

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112042130A (en) * 2018-04-26 2020-12-04 株式会社村田制作所 Wireless communication module

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112042130A (en) * 2018-04-26 2020-12-04 株式会社村田制作所 Wireless communication module
CN112042130B (en) * 2018-04-26 2021-10-01 株式会社村田制作所 Wireless communication module

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