CN1917546A - Portable type electronic equipment - Google Patents
Portable type electronic equipment Download PDFInfo
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- CN1917546A CN1917546A CN 200610062415 CN200610062415A CN1917546A CN 1917546 A CN1917546 A CN 1917546A CN 200610062415 CN200610062415 CN 200610062415 CN 200610062415 A CN200610062415 A CN 200610062415A CN 1917546 A CN1917546 A CN 1917546A
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Abstract
The apparatus comprises a power supply module and several functional modules. The power supply module comprises: a main power unit for transforming its output voltage into a first preset voltage that is provided for the series voltage regulators of several functional modules through a shared output end; a switching voltage regulator for transforming the output voltage from main power unit into a second preset voltage that is provide for several functional modules through a shared output end; and a feedback unit for feeding back a detected voltage on the shared output end to the series voltage regulators and the input of the switch voltage regulator in order to compare the detected voltage with the reference voltage input to control the opening or closing of the series voltage regulator. The first preset voltage is less than the second preset voltage.
Description
Technical field
The present invention relates to a kind of portable electron device, relate in particular to a kind of supply unit of portable electric appts, and described portable electric appts has bigger electric current excursion.
Background technology
Along with the widespread usage of portable electron device, its energy consumption and stability thereof also more and more are subjected to the attention of consumer and manufacturer, and a management that important influencing factor is exactly a device power supply (DPS) of energy consumption and stability.The portable electron device that some load current excursions are bigger, smart mobile phone etc. for example, when it is under sleep pattern or the standby mode, its required electric current may have only a few to tens of milliamperes; And when its full speed running or several function were moved simultaneously, its load current can reach more than 1 peace, big like this load current excursion, and DC/DC transducer or low pressure drop (LDO) pressurizer all is difficult to the independent power supply capacity of finishing.
Prior art usually adopts the switching regulator that switches the series voltage regulator that uses LDO pressurizer etc. and DC/DC transducer etc. according to the size of load current to come voltage of transformation, promptly when low loads such as standby, switch to the LDO pressurizer and suppress power consumption, load becomes big in use, then switches to the DC/DC transducer.Disclosed a kind of supply unit as Chinese 200410095997.X patent application, it comprises switching regulator and series voltage regulator, and by one switch the energy force rate of control part control switch pressurizer during action in itself and the series voltage regulator usually a little less than.Yet the power module of above-mentioned existing portable electron device output voltage when switching easily produces change, can not supply with stable voltage, stability that can't the support equipment operation.
Summary of the invention
For the power supply that overcomes existing portable electron device is difficult to satisfy the deficiency that big electric current is exported, a kind of portable electron device is provided, have the advantages that energy consumption is low, can satisfy the large load current demand, thus the stable operation of the equipment of assurance.
For solving the problems of the technologies described above, the technical solution adopted in the present invention is: a kind of portable electron device is provided, it comprises a power module and a plurality of functional module, described power module comprises a main power source unit, it also comprises a series connection pressurizer, is used for that main power source unit output voltage is transformed into first setting voltage and transfers to public output to a plurality of functional modules power supplies; One switching regulator is used for that main power source unit output voltage is transformed into second setting voltage and transfers to public output to described a plurality of functional module power supplies; One feedback unit, be used for the detection voltage of described public output is fed back to described series voltage regulator and described switching regulator input respectively, respectively with the input of the reference voltage of described series voltage regulator and described switching regulator relatively with the unlatching of control series voltage regulator or close; Described first setting voltage is less than second setting voltage.
Described feedback unit comprises first feedback element that links to each other with described series voltage regulator and second feedback element that links to each other with described switching regulator, and it is unequal that second of first detection voltage of described first feedback element output and the output of second feedback element detects voltage.
Described series voltage regulator has identical reference voltage input with described switching regulator.
First reference voltage input of described series voltage regulator is unequal with second reference voltage input of described switching regulator.
Described series voltage regulator uses identical feedback unit with described switching regulator, has same feedback point.
Described series voltage regulator is the LDO pressurizer.
Described switching regulator is the DC/DC transducer.
Another technical scheme of the present invention is: a kind of portable electron device is provided, it comprises a power module and a plurality of functional module, described power module comprises a main power source unit, it also comprises: a series connection pressurizer is used for that main power source unit output voltage is transferred to public output and gives a plurality of functional module power supplies; One switching regulator is used for that main power source unit output voltage is transferred to public output and gives described a plurality of functional module power supply; Described portable electron device separately is its power supply by switching regulator at load current under less than the set point situation, and this moment, series voltage regulator cut out, and is powered simultaneously by switching regulator and series voltage regulator during greater than set point at load current.
Described switching regulator is the DC/DC transducer.
Described series voltage regulator is the LDO pressurizer.
Beneficial effect of the present invention is: because portable electron device of the present invention is by being provided with a series connection pressurizer and a switching regulator in power module, and according to the size of load current, dynamically regulate the operating state of described series voltage regulator and switching regulator and the ability of electric power outputting current, both satisfied the large load current demand, reduce energy consumption again, guaranteed the stable operation of equipment.
Description of drawings
Fig. 1 is the theory diagram of the power module of portable electron device of the present invention;
Fig. 2 is the schematic diagram of the power module LDO pressurizer of portable electron device of the present invention when detecting as low pressure;
Fig. 3 is an embodiment schematic diagram of the power module LDO pressurizer of portable electron device of the present invention;
Fig. 4 is an embodiment schematic diagram of the power module of portable electron device of the present invention;
Fig. 5 is the load current step schematic diagram that the 3.3V of the power module of portable electron device of the present invention exports.
Embodiment
See also Fig. 1, portable electron device of the present invention comprises a system power supply module (not indicating), is used for each the functional module power supply to cell phone system.Power module comprises main power source unit 101, it mainly is the dc voltage by battery 105 or power supply adaptor 106 supply 3.6V~5.0V, main power source unit 101 is connected with first transducer 104, DC/DC transducer 102 and LDO pressurizer 103 respectively, first transducer 104 converts above-mentioned dc voltage to load current smaller magnitude of voltage, the core voltage 1.8V used as CPU; DC/DC transducer 102 and LDO pressurizer 103 are respectively applied for and main power source unit output voltage is transformed into first and second setting voltage transfers to public output and give a plurality of functional modules, as module for power supply such as Codec 107, BlueTooth108, CPU 109, WLAN 110, GPS 111 and SD Card 112.
See also Fig. 2, the AO of LDO pressurizer 103 is connected with a resistance R 200, it is as pull-up resistor, and the AI of LDO pressurizer 103 is connected with R202 with two resistance R 201, and it is as the dividing potential drop feedback resistance.The scope of the voltage of V201 input is 3.3~4.2V, when the magnitude of voltage of V201 is lower than 3.3V, and LBO end output low level alarm signal then, this moment, mobile phone CPU can handle accordingly according to detecting low level existence, as shutdown etc.
See also Fig. 3, one PNP Q300 further is set between dividing potential drop feedback resistance and pull-up resistor, when by the magnitude of voltage of divider resistance R301, R302 dividing potential drop gained during less than 0.8V, the AO end is low level, then PNP Q300 conducting, V301=V300 is when partial pressure value during greater than 0.8V, the AO end is high level, and Q300 ends.The detection voltage V of LDO pressurizer 103
AI=0.8V, the value of output voltage V 301 can be obtained by following formula:
By getting in the formula, the value of configuration R301 and R302 will obtain desirable output voltage values V301.
Because many modules are used the voltage of 3.3V in the cell phone system, therefore to the requirement of 3.3V electric current fan-out capability than higher, consider that each module is worked simultaneously and the situation of an independent module job, so the scope of its load current dynamic change is bigger.When power supply chip internal current limit value was 900mA, DC/DC transducer 102 provided the output of 3.3V, a 600mA usually.Though this output current is enough for the most application of cell phone system, some is used then needs a 3.3V power supply that the above electric current of 1A can be provided.
See also Fig. 4, the PMOS switch Q400 of another embodiment of the present invention by adopting a dainty type SOT23 encapsulation is arranged on PNP Q300 between dividing potential drop feedback resistance and the pull-up resistor with replacement, and then 3.3V output just can provide 1A above output current.Vmax is to be power supply by main power source part 101 among the figure, and its voltage range is 3.6~5.0V, and Vmax is as the power input of DC/DC transducer 102 and LDO pressurizer 103; FB is the feedback pin of DC/DC transducer 102, by feedback resistor R401, R402 and R403 are connected to the output voltage V out that this pin is set the SO end, and guarantee DC/DC transducer 102 output when Vout is less than 3.3V, output voltage values is determined by formula 2:
In the practical application, the output voltage V out that DC/DC transducer 102 SO end is set according to formula 2 is 3.3V.According to formula 1, dispose the value of corresponding dividing potential drop feedback resistance R401, R402 and R403, (present embodiment is 3.2V to the output voltage values that LDO pressurizer 103 is set a little less than the voltage of SO end, low 3%), if LDO pressurizer 103 also is made as 3.3V output, the feedback signal of LDO pressurizer 103 and DC/DC transducer 102 (promptly can be used same feedback signal) in same position so, cause arbitrary moment LDO pressurizer 103 and DC/DC transducer 102 all will work simultaneously, LDO pressurizer conversion efficiency is lower, consumes bigger.By among Fig. 4 as can be known, the magnitude of voltage of the feedback end AI of LDO pressurizer 103 is:
When mobile phone is in sleep pattern, standby mode or is that Vout>3.2V can get V by formula 3 under the less situation of independent module operation even load current ratio
AI>0.8V, then the AO end keeps high level, and Q400 is in closed condition, and LDO pressurizer 103 cuts out fully, all electric currents that have only DC/DC transducer 102 to provide mobile phone to consume this moment; When mobile phone is under the full speed mode of operation, when several modules were moved simultaneously, load current increased, and under some situation, load current can exceed the power supply capacity of DC/DC transducer 102, and the Vout value reduces, when Vout<3.2V, and V
AI<0.8V, then the AO end is dragged down, the Q400 conducting, LDO pressurizer 103 just inserts power output circuit.So just improved the electric current fan-out capability of power supply.
Be appreciated that being enough to is provided by DC/DC transducer 102 as long as load current is lower, then LDO pressurizer 103 will turn-off fully.When load current exceeded the power supply capacity of DC/DC transducer 102, LDO pressurizer 103 will be opened automatically, increased the power supply capacity of power supply.The present invention is highly suitable for those application that just needs higher 3.3V output current momently.Usually the DC/DC transducer 102 that conversion efficiency is high provides whole output currents, then of short duration connection and required extracurrent is provided when needs provide higher load current of LDO pressurizer 103, so both reduce energy consumption, guaranteed the stability of system's operation again.
Be appreciated that the feedback point difference of LDO pressurizer 103 and DC-DC transducer 102 in the present embodiment, reference voltage all is to adopt 0.8V; Also can adopt identical feedback point, change the method for reference voltage, make two kinds of reference voltage of regulators inconsistent, the reference voltage of DC-DC transducer 102 is arranged to reference voltage less than LDO pressurizer 103, when being lower than 3.3 volts with assurance, 102 work of DC-DC transducer, LDO pressurizer 103 is worked simultaneously again when being lower than 3.2 volts.
Fig. 5 shows when the transient response of 3.3V output current during from the 0.5A step to 1.2A.Value that can be by increasing output capacitance C401 is to improve the 3.3V transient response during these high current loads steps.
Be appreciated that, the DC/DC transducer of portable electron device of the present invention also can be the close switching regulator of other functions, the LDO pressurizer also can adopt the close series voltage regulator of other functions to replace, only a feedback unit need be set, and first of portable electron device public output is detected the input of Voltage Feedback to series voltage regulator by first feedback element (as R201 among the above-mentioned embodiment and R202) that links to each other with series voltage regulator, by second feedback element that links to each other with switching regulator (as the R401 among the above-mentioned embodiment, R402 and R403) second of portable electron device public output is detected the input of Voltage Feedback to switching regulator, again by detecting reference voltage input that voltage and second detects voltage and series voltage regulator and switching regulator relatively with the unlatching of controlling series voltage regulator or close and get final product with first; The reference voltage of above-mentioned series voltage regulator and switching regulator can be identical or different.
The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention, all any modifications of being made within the spirit and principles in the present invention, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1, a kind of portable electron device, it comprises a power module and a plurality of functional module, described power module comprises a main power source unit, it is characterized in that, also comprises:
One series connection pressurizer is used for that main power source unit output voltage is transformed into first setting voltage and transfers to public output to a plurality of functional modules power supplies;
One switching regulator is used for that main power source unit output voltage is transformed into second setting voltage and transfers to public output to described a plurality of functional module power supplies;
One feedback unit, be used for the detection voltage of described public output is fed back to described series voltage regulator and described switching regulator input respectively, respectively with the input of the reference voltage of described series voltage regulator and described switching regulator relatively with the unlatching of control series voltage regulator or close;
Described first setting voltage is less than second setting voltage.
2, portable electron device as claimed in claim 1, it is characterized in that: described feedback unit comprises first feedback element that links to each other with described series voltage regulator and second feedback element that links to each other with described switching regulator, and it is unequal that second of first detection voltage of described first feedback element output and the output of second feedback element detects voltage.
3, portable electron device as claimed in claim 2 is characterized in that: described series voltage regulator has identical reference voltage input with described switching regulator.
4, portable electron device as claimed in claim 1 is characterized in that: first reference voltage input of described series voltage regulator is unequal with second reference voltage input of described switching regulator.
5, portable electron device as claimed in claim 4 is characterized in that: described series voltage regulator uses identical feedback unit with described switching regulator, has same feedback point.
6, portable electron device as claimed in claim 1 is characterized in that: described series voltage regulator is the LDO pressurizer.
7, portable electron device as claimed in claim 6 is characterized in that: described switching regulator is the DC/DC transducer.
8, a kind of portable electron device, it comprises a power module and a plurality of functional module, described power module comprises a main power source unit, it is characterized in that, also comprises:
One series connection pressurizer is used for that main power source unit output voltage is transferred to public output and gives a plurality of functional module power supplies;
One switching regulator is used for that main power source unit output voltage is transferred to public output and gives described a plurality of functional module power supply;
Described portable electron device separately is its power supply by switching regulator at load current under less than the set point situation, and this moment, series voltage regulator cut out, and is powered simultaneously by switching regulator and series voltage regulator during greater than set point at load current.
9, portable electron device as claimed in claim 8 is characterized in that: described switching regulator is the DC/DC transducer.
10, portable electron device as claimed in claim 8 is characterized in that: described series voltage regulator is the LDO pressurizer.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN 200610062415 CN1917546A (en) | 2006-09-01 | 2006-09-01 | Portable type electronic equipment |
Applications Claiming Priority (1)
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CN 200610062415 CN1917546A (en) | 2006-09-01 | 2006-09-01 | Portable type electronic equipment |
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CN1917546A true CN1917546A (en) | 2007-02-21 |
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Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102271188A (en) * | 2011-07-27 | 2011-12-07 | 宇龙计算机通信科技(深圳)有限公司 | Mobile terminal and power management method |
CN101777786B (en) * | 2009-01-14 | 2012-09-05 | 英业达股份有限公司 | Power supply device and method for portable electronic device |
WO2012135973A1 (en) * | 2011-04-06 | 2012-10-11 | Integrated Device Technology, Inc. | Power management integrated circuit using a flexible script-based configurator and method for power management |
CN104333066A (en) * | 2014-10-31 | 2015-02-04 | 上海斐讯数据通信技术有限公司 | Charging system |
CN105363127A (en) * | 2015-12-01 | 2016-03-02 | 杭州承诺医疗科技有限公司 | Sacral nerve stimulation generator |
CN107204705A (en) * | 2016-03-18 | 2017-09-26 | 电信科学技术研究院 | The control method of DC-DC adjusters and its soft start, controller |
-
2006
- 2006-09-01 CN CN 200610062415 patent/CN1917546A/en active Pending
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101777786B (en) * | 2009-01-14 | 2012-09-05 | 英业达股份有限公司 | Power supply device and method for portable electronic device |
WO2012135973A1 (en) * | 2011-04-06 | 2012-10-11 | Integrated Device Technology, Inc. | Power management integrated circuit using a flexible script-based configurator and method for power management |
US9092217B2 (en) | 2011-04-06 | 2015-07-28 | Integrated Device Technology, Inc. | Power management integrated circuit using a flexible script-based configurator and method for power management |
CN102271188A (en) * | 2011-07-27 | 2011-12-07 | 宇龙计算机通信科技(深圳)有限公司 | Mobile terminal and power management method |
CN104333066A (en) * | 2014-10-31 | 2015-02-04 | 上海斐讯数据通信技术有限公司 | Charging system |
CN104333066B (en) * | 2014-10-31 | 2017-08-04 | 上海斐讯数据通信技术有限公司 | A kind of charging system |
CN105363127A (en) * | 2015-12-01 | 2016-03-02 | 杭州承诺医疗科技有限公司 | Sacral nerve stimulation generator |
CN107204705A (en) * | 2016-03-18 | 2017-09-26 | 电信科学技术研究院 | The control method of DC-DC adjusters and its soft start, controller |
CN107204705B (en) * | 2016-03-18 | 2019-04-19 | 电信科学技术研究院 | The control method of DC-DC adjuster and its soft start, controller |
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