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1. can be manufactured The tip output terminal 430 is fabricated to have the shape and polarity that are suitable for the power input terminal 510 of the portable electronic device 500 20 25 30 45 50 55 60 65 6 The select information display unit 440 functions to inform a user of a state set in a tip and includes numerical information to indicate numbers on the outside of the tip color information that is displayed at the end or body of the tip and a use manual provided additionally The numerical information indicates a number or symbol depending on a shape and reference voltage of the tip output terminal 430 The color information indicates color depending on a volt age set in a tip Such a select information display unit 440 can be fabricated by forming a tip having a proper voltage and a shape of a connector in a portable electronic device displaying numerical information and color information on the outside of the tip and then presenting a model name and user method of the portable electronic device to the user manual The user can find a tip 400 available to his or her portable electronic device from the user manual and then connect it to the cable output terminal 320 Accordingly a user that has no idea on electronic common sense can use easily the portable electronic device However it is impossible to represent the entire portable devices that can be used with only such numerical informa tion on the u
2. 4 wherein the universal power supply apparatus operates as a DC DC adaptor using the DC power as an input power to the main unit 20 The universal power supply apparatus as claimed in claim 2 wherein the universal power supply apparatus operates as an external type battery pack in which a battery and a battery control circuit are connected to the input terminal of the main unit 21 The universal power supply apparatus as claimed in claim 3 wherein the universal power supply apparatus operates as an external type battery pack in which a battery and a battery control circuit are connected to the input terminal of the main unit 22 The universal power supply apparatus as claimed in claim 4 wherein the universal power supply apparatus operates as an external type battery pack in which a battery and a battery control circuit are connected to the input terminal of the main unit 23 The universal power supply apparatus as claimed in claim 2 wherein the universal power supply apparatus operates as an AC DC adaptor using the AC power as an input power to the main unit 24 The universal power supply apparatus as claimed in claim 3 wherein the universal power supply apparatus operates as an AC DC adaptor using the AC power as an input power to the main unit 25 The universal power supply apparatus as claimed in claim 4 wherein the universal power supply apparatus operates as an AC DC adaptor using the AC power as an input power to the ma
3. 5 7 1993 responding PCT Application PCT KR2004 000899 Dated Dec 9 JP 1996 033337 2 1996 2004 JP 1999 262172 9 1999 JP 2002 191133 5 2002 cited by examiner U S Patent May 27 2008 Sheet 1 of 2 US 7 377 805 B2 Fig 1 500 400 440 410 510 g 420 0 a20 Fig 2 300 o y a S1 S1 U S Patent May 27 2008 Sheet 2 of 2 US 7 377 805 B2 Fig 4 Ho a a t Fig 5 Fig 6 Casing Substrate US 7 377 805 B2 1 UNIVERSAL POWER SUPPLY APPARATUS TECHNICAL FIELD The present invention relates to a universal power supply apparatus that can be used in various portable electronic devices manufactured by different manufacturers and dif ferent functions in selecting a tip having a shape suitable for the portable electronic devices BACKGROUND ART Each of portable electronic devices such as a notebook a PDA a portable DVD a camcorder a digital camera and a mobile phone has a battery therein for a portable use In order to charge and use the battery it is required that the DC power having an adequate voltage be supplied through a connector of a proper shape These portable electronic devices however have different voltages depending on not only the type of the device but also the manufacturer The shape of the input unit for receiving the DC power also varies depending on each device Accordingly a user having various kinds of portable electronic devices must carry several power supply a
4. PCT KR2004 000899 Dated Dec 9 2004 Continued Primary Examiner Khiem Nguyen 74 Attorney Agent or Firm Cantor Colburn LLP 57 ABSTRACT The present invention relates to an universal power supply apparatus wherein the power suitable for various kinds of portable electronic devices having different shapes and voltages of power input terminals is selectively supplied and a power supply apparatus wherein a supplied voltage can be changed with only selection of a tip suitable for a portable electronic device The power supply apparatus of the present invention includes a main unit having an elec tronic circuit for converting a received voltage a cable and a tip having a select pin According to the present invention as a desired power supply voltage is automatically adjusted by selecting a proper tip according to a subject electronic device a manufacture cost is reduced Further as the power supply apparatus of the present invention can be used for various kinds of portable electronic devices by exchanging a tip its operation is very easy 28 Claims 2 Drawing Sheets US 7 377 805 B2 Page 2 U S PATENT DOCUMENTS JP 2002262451 9 2002 JP 2003273976 9 2003 7 081 010 B2 7 2006 Gorman s esssesesseeseeeeee 439 535 p 5005269651 51005 7 091 421 B2 8 2006 Kukita et al oe 174 112 FOREIGN PATENT DOCUMENTS OTHER PUBLICATIONS JP 3 278208 12 1991 Written Opinion of the International Searching Authority of Cor JP 5 16742
5. Pat Nos 5 510 691 6 604 177 6 091 611 and so on disclose a method for providing a special unit for changing a voltage in the tip or cable The special unit includes inevitably at least one electronic element such as a resistor a condenser and a diode This unit is usually called an attached circuit In case where an electronic element is disposed in the cable how ever an expensive cable has to be used as the electronic device changes Further if the special unit is installed in the tip between the main circuit and the attached circuit has to be connected by means of a long cable Accordingly the method for providing the special unit has disadvantages that its manufacture and test methods are difficult and stability of a voltage is also low 40 45 60 65 2 DISCLOSURE OF INVENTION Accordingly the present invention has been made in view of the above problems and it is an object of the present invention to provide a universal power supply apparatus that can be applied to various portable electronic devices manu factured by different manufacturers and having different voltages using one unit through only selection of a suitable tip by means of a tip 400 having a select pin 420 for selecting a voltage suitable for a portable electronic device and a select information display unit 440 for displaying a set state of the tip to a user According to the present invention the tip 400 includes the select pin 420 for informing a
6. arrays included in the output select unit 200 For example if one select pin 420 is used there are three states such as a short circuit connection to the pole and connection to the pole Three different outputs can be obtained by disposing one resistor corre sponding to the select pin 420 Accordingly by constructing the output select unit 200 using the resistor arrays having the N number of the select pin 420 and the N number of the resistors the 3N number of different voltages can be selected At this time if the number of the voltage required is below 3N the 2N number of different voltages can be selected by using the select pin as two states such as the short circuit and connection to the pole The power output terminal 130 of the main unit further includes the select stages S1 to Sn that can be connected as many as the number of the select pin 420 of the tip in addition to the and terminals The cable unit 300 serves to connect the main unit 100 and the tip 400 The cable unit 300 includes a cable input terminal 310 connected to the main unit 100 a cable output terminal 320 connected to the tip 400 an inner cable connected to the I O terminals and an outer cover surround ing an inner cable The cable input terminal 310 is connected to the output terminal of the main unit 100 In the present invention connection to the input unit may be integrated as a single body by adding the main unit thereto depending
7. atuses that are fabricated in various manners according to the type of an external power according to the present invention 20 25 30 35 40 45 50 55 60 65 8 FIG 4 shows the universal DC DC adaptor in which the main unit 100 is used as a substrate an external power cable 101 for receiving the DC power from a vehicle s cigarette jack is connected to a power input terminal 110 included in the substrate a cable unit 300 is connected to a power output terminal 130 of a main unit and a plastic casing is used as an external appearance The input power cable 101 may include a cable for a vehicle a cable for an airplane located at the airplane s seat a cable from a specific DC power source and the like FIG 5 shows the universal external type battery pack in which a battery 102 and a circuit unit 103 for controlling the battery are connected to at the front of the input terminal of the main unit 100 a connector mated with the input terminal of the cable unit 300 is located at the output terminal 130 and a casing is finished The battery pack provides a voltage suitable for an input voltage range allowed by a portable electronic device and can thus be effectively used in wide places than the battery pack having no such function The battery 102 may include a primary cell such as alkaline a secondary cell such as a Li ion battery a NiMH battery and a lead acid battery a fuel cell such as a DMFC Direct Methano
8. az United States Patent US007377805B2 10 Patent No US 7 377 805 B2 Kim et al 45 Date of Patent May 27 2008 54 UNIVERSAL POWER SUPPLY APPARATUS 5 510 691 A 4 1996 Palatov ceeeceeeeeesteees 320 2 6 091 611 A 7 2000 Lanni 363 21 75 Inventors Hyun Jun Kim Daejeon KR 6 604 177 Bl 8 2003 Kondo et al 711 150 Dae Young Youn Daejeon KR 6 908 334 B2 6 2005 Huang eee 439 491 73 Assignee Smart Power Solutions Inc KR Notice Subject to any disclaimer the term of this patent is extended or adjusted under 35 U S C 154 b by 211 days 21 Appl No 10 564 613 22 PCT Filed Apr 20 2004 86 PCT No 371 c 2 4 Date PCT KR2004 000899 Jan 12 2006 87 PCT Pub No WO2005 088820 PCT Pub Date Sep 22 2005 65 Prior Publication Data US 2006 0163948 Al Jul 27 2006 30 Foreign Application Priority Data Mar 18 2004 KR wee 10 2004 0018602 51 Int Cl HOIR 11 00 2006 01 52 U S Ch ossis 439 502 439 638 307 18 58 Field of Classification Search 439 500 504 439 638 668 491 307 18 25 26 28 29 320 2 111 112 323 225 See application file for complete search history 56 References Cited U S PATENT DOCUMENTS 5 347 211 A 9 1994 Jakubowski 323 351 Casing Continued FOREIGN PATENT DOCUMENTS JP 1990260618 10 1990 Continued OTHER PUBLICATIONS PCT International Search Report
9. ck if the DC power outputted from a battery mounted therein is used as the input BRIEF DESCRIPTION OF DRAWINGS Further objects and advantages of the invention can be more fully understood from the following detailed descrip tion taken in conjunction with the accompanying drawings in which FIG 1 shows a boost type DC DC converter using two select pins according to an embodiment of the present invention FIG 2 shows three kinds of states represented by a tip when one select pin is used FIG 3 shows an external appearance of a tip having one select pin and a cable according to the present invention FIG 4 shows a universal DC DC adaptor fabricated according to the present invention FIG 5 shows a universal external type battery pack fabricated according to the present invention and FIG 6 shows a universal AC DC adaptor fabricated according to the present invention US 7 377 805 B2 3 BEST MODE FOR CARRYING OUT THE INVENTION A universal power supply apparatus of the present inven tion includes a tip 400 having a select pin 420 for selecting a voltage and a select information display unit 440 for helping a user to select a proper tip a main unit 100 having an output select unit 200 for selecting and outputting a necessary voltage through only connection information of a select pin in the tip and a cable 300 for connecting the tip and the main unit The select pin 420 has one side to from which the cable connected to t
10. claimed in claim 4 wherein a first voltage selected by the change of the select pin is 15 to 16 volts a second voltage is 18 to 20 volts and a use power is 60 to 90 watts 14 The universal power supply apparatus as claimed in claim 2 wherein a first voltage condition selected by the change of the select pin is 4 to 5 volts a second voltage condition is 9 to 10 volts a third voltage condition is 12 to 15 volts and a use power is 5 to 24 watts 15 The universal power supply apparatus as claimed in claim 3 wherein a first voltage condition selected by the change of the select pin is 4 to 5 volts a second voltage condition is 9 to 10 volts a third voltage condition is 12 to 15 volts and a use power is 5 to 24 watts 16 The universal power supply apparatus as claimed in claim 4 wherein a first voltage condition selected by the change of the select pin is 4 to 5 volts a second voltage condition is 9 to 10 volts a third voltage condition is 12 to 15 volts and a use power is 5 to 24 watts 17 The universal power supply apparatus as claimed in claim 2 wherein the universal power supply apparatus operates as a DC DC adaptor using the DC power as an input power to the main unit 18 The universal power supply apparatus as claimed in claim 3 wherein the universal power supply apparatus operates as a DC DC adaptor using the DC power as an input power to the main unit 19 The universal power supply apparatus as claimed in claim
11. e tip compared to the conventional 20 25 30 35 40 45 50 55 60 65 4 universal power supply apparatus having the attached cir cuit simplify a manufacture process and reduce the price of a product Further there is an advantage that a user can secure the power supply apparatus which is applicable to variety of products having different voltages through only simple work to replace a tip The present invention will now be described in detail in connection with preferred embodiments with reference to the accompanying drawings FIG 1 shows a boost type DC DC converter using two select pins 420 according to an embodiment of the present invention The number of the select pins 420 refers to the number of pins for selecting a voltage except for and lines If the number of the select pins 420 is two a total number of the pins disposed within the tip 400 is 4 As two pins for connection to the line and the lines are included however the number of the pins that actually serve as the select pin is two The main unit 100 shown in FIG 1 further includes the output select unit 200 for interpreting information on the connection state of the select pin 420 included in the tip and then producing different outputs in a SMPS switching mode power supply circuit using a common PWM Pulse Width Modulation mode To this end the main unit 100 includes a power input terminal 110 for receiving the DC power being
12. ent invention a desired power supply voltage is auto matically adjusted by selecting a proper tip according to a subject electronic device Accordingly a manufacturer can reduce a manufacture cost since circuits are commonly manufactured a seller can conveniently sell tips since the tips are easily discriminated and a user can easily use various kinds of portable electronic devices by exchanging the tips Furthermore if an input constituting the present invention is disposed in a cable mated with the DC power outputted from a vehicle an aircraft etc and is finished with a casing a universal DC DC adaptor is provided If the input is used as the AC power a universal AC DC adaptor is provided If a battery is installed therein a universal external type battery pack is provided US 7 377 805 B2 9 In the universal power supply apparatus according to the present invention as pins are connected to tips without inserting an electronic device various voltages can be selected As the electronic device is concentrated to one place of a main unit there are advantages that a manufacture process can be simplified the tip can be miniaturized and a manufacture cost can be reduced compared to a conven tional universal power supply apparatus having an attached circuit What is claimed is 1 An universal power supply apparatus comprising a tip that is attachable and detachable wherein the tip comprises a select pin for selecting a v
13. he main unit is attachable detachable and the other side formed according to the shape of a DC input terminal of a portable electronic device and stores infor mation on a voltage needed by the portable electronic device Further the select information display unit 440 displays information on the selected tip The tip of the present invention is designed so that the output select unit of the main unit can select a desired voltage through only a short circuit connection to the pin and connection to the pin of the select pin 420 connected to the main unit unlike a conventional method for inserting electronic elements such as a resistor a diode and a con densor The main unit 100 further includes the output select unit 200 for sensing information on three kinds of connection states the short circuit connection to the pin and connection to the pin of the select pin included in the tip of the present invention and then providing a proper voltage in a SMPS type power supply converter which is controlled in a common PWM mode such as a boost type a buck type and a fly back type The output select unit 200 includes a resistor array having one or more resistors that can change a divided value of a reference voltage using a feedback stage of a PWM control IC The output select unit 200 is located within the main unit 100 The cable unit 300 includes signal lines for connecting the tip and the main unit The signal line serve to
14. in unit 26 The universal power supply apparatus as claimed in claim 2 wherein the voltage converter comprises a PWM control IC being one of components of a SMPS circuit a FET being a switching device a diode an inductor or a US 7 377 805 B2 11 transformer and condensers for smoothing voltages at input and output sides 27 The universal power supply apparatus as claimed in claim 3 wherein the voltage converter comprises a PWM control IC being one of components of a SMPS circuit a FET being a switching device a diode an inductor or a transformer and condensers for smoothing voltages at input and output sides 12 28 The universal power supply apparatus as claimed in claim 4 wherein the voltage converter comprises a PWM control IC being one of components of a SMPS circuit a FET being a switching device a diode an inductor or a transformer and condensers for smoothing voltages at input and output sides
15. l Fuel Cell and PEM FC Proton Exchange Mem brane Fuel Cell and so on The battery control circuit 103 includes a protection circuit for protecting the battery a charge circuit for charg ing the battery and a user interface circuit for informing a user of the available capacity of the battery etc Further more the external type battery pack includes a terminal 140 for charging a LED for displaying the capacity of the battery and a user interface unit 150 having a switch FIG 6 shows the universal AC DC adaptor in which a power input terminal 110 has a connector 105 that can be connected by an AC cable 104 a voltage converter 120 receives AC current to form a fly back type SMPS a cable 300 is connected thereto and a casing is finished The universal AC DC adaptor is an adaptor that can be used in various kinds of portable electronic devices like the univer sal DC DC adaptor and the universal external type battery The fly back type SMPS used in this embodiment is the same as the boost type DC DC convert circuit presented in FIG 1 in that it has an output converter 200 and analyzes the output terminal S1 of the tip to produce different outputs to the tip but is different from the boost type DC DC convert circuit presented in FIG 1 in that it uses a transformer instead of an inductor and includes an optocoupler for receiving a feedback signal INDUSTRIAL APPLICABILITY In a universal power supply apparatus according to the pres
16. main unit of a voltage that is internally required through only connection state infor mation a short circuit connection to a connection to a and the select information display unit 440 for helping a user to select a tip suitable for an electronic device to be used Further the main unit 100 further includes an output select unit 200 for receiving and allowing a desired voltage to be selected using connection information of the select pin included in the tip in a switching mode power supply SMPS circuit of a PWM Pulse Width Modulation mode used in a common power supply apparatus Therefore the universal power supply apparatus having the main unit 100 which consists of the tip 400 in which the select pin 420 is included and the output select unit 200 has advantages that a tip is miniaturized manufacture and test methods are simple and the price is low compared to a conventional power supply apparatus having a circuit into which additional components separated from a main unit are inserted The power supply apparatus of the present invention can be used as a universal DC DC adaptor that can be used in portable electronic devices having different shapes of input terminals by selecting a proper tip 400 using one main unit if the DC power such as a vehicle and an aircraft is used as an input can be used as a universal AC DC adaptor if the AC power is used as the input and can be used as a universal external type battery pa
17. nal of the FET Q The voltage converter 120 may be a boost type a buck type or a fly back type circuit The PWM control IC according to the present circuit may include various kinds of PWM control ICs such as Max668 TL494 UCC3843 and UCC38H43 The voltage converter 120 necessarily includes the PWM control IC 121 being one of components of the SMPS circuit the FET Q being a switching device a diode D an inductor or a transformer L and condensers Cin and Cout for smoothing the voltages at the input and output terminal However the voltage converter 120 may be a boost type pressure sensitive type or fly back type circuit depending on the type of the input used and a state of a voltage to be outputted Furthermore the voltage converter 120 includes circuits for securing stability such as blocking of overvolt age and overcurrent and separation of the input and output US 7 377 805 B2 5 as basic circuits The voltage converter 120 may further include a circuit for removing an electronic wave a circuit for displaying the operating state and so one The output select unit 200 includes resistor arrays R1 to Rn for providing a divided value of the reference voltage to the feedback terminal of the PWM control IC 121 according to states of select stages S1 to Sn included in the select pin 420 of the tip 400 The type of the voltage to be outputted is decided depending on the number of the select pin 420 used and the number of the resistor
18. nd Equation 32 in case of the pole junction Vout short circuit Vref 1 Ra Rb 1 Vout pole junction Vreff1 Ra Rb R1 Rb R I 2 Vout pole junction Vreff1 Ra R1 Ra R1 VRb 3 According to an embodiment of the present invention a case where the universal power supply apparatus for sup plying the power to the notebook computer to be constructed will be described in more detail A typical notebook computer usually has built 6 to 12 lithium ion batteries in uses a voltage of 18 to 20 volts or a voltage of 15 to 16 volts and has the power of 60 to 90 Watts A portable DVD has 4 to 8 lithium ion batteries and a voltage of 12 to 13 volts As an embodiment of the present invention to be applied to it a 72 watts universal power US 7 377 805 B2 7 supply apparatus having one select pin S1 of 420 and the resistor R1 of the output select unit is fabricated The universal power supply apparatus can be applied to a note book computer and a portable DVD player over 80 To this end in Max668 whose reference voltage is 1 25 volts Ra is 45K ohms Rb is 3 8K ohms and R1 is 150K ohms a voltage of 15 to 16 volts is obtained in the short circuit state a voltage of 18 to 20 volts is obtained in the junction state and a voltage of 12 to 13 volts is obtain in the junction state Similarly in UCC38H43 whose reference voltage is 2 5 volts it is possible to obtain the same result as the above if Ra Rb and R1 are set t
19. o 20 Kohms 3 8 Kohms and 62 Kohms respectively In the above the resistance values are not limited to the above values but can be variously changed in deciding resistance and the amount of output watt that satisfy Equa tion 1 to Equation 3 It is thus possible to obtain the universal power supply apparatus that can be applied to a variety of products In using the universal power supply apparatus fabricated as above a user can change a first voltage suitable for a first device to a second voltage suitable to a second device by simply inserting the tip 400 fabricated according to the reference As another application embodiment in case of a PDA a mobile phone a camcorder a digital camera and a portable DVD player which use 1 to 6 lithium ion batteries it is effective to fabricate an universal power supply apparatus that has the power of below 5 to 24 watts and can select 2 to 6 voltages using 2 or less select pins Therefore a 18 watts universal power supply apparatus which has a PWM control IC whose reference voltage is 1 25 volts Ra of 21 Kohms Rb of 3 4 Kohms and R1 of 20 Kohms and one select pin whose first voltage condition pole junc tion is 4 to 5 volts second voltage condition short circuit is 9 to 10 volts and third voltage condition pole junc tion is 12 to 15 volts is fabricated The 18 watts universal power supply apparatus can be then applied to a PDA a mobile phone a camcorder and a digital camera ove
20. oltage a tip input terminal and a tip output terminal a main unit having a voltage converter an input terminal an output terminal and an output select unit for con verting a divided value of a reference voltage according to a state of a select stage included in the select pin of the tip and a cable for connecting the tip and the main unit 2 The universal power supply apparatus as claimed in claim 1 wherein the tip is exchanged according to a desired select voltage 3 The universal power supply apparatus as claimed in claim 1 wherein the tip further comprises a select informa tion display unit for displaying selection of a tip 4 The universal power supply apparatus as claimed in claim 3 wherein the select information display unit com prises a numerical information display unit for displaying an adequate shape and voltage to a DC input terminal of an electronic device and a color information display unit for displaying color 5 The universal power supply apparatus as claimed in claim 1 wherein a first voltage selected by the change of the select pin is 15 to 16 volts a second voltage is 18 to 20 volts and a use power is 60 to 90 watts 6 The universal power supply apparatus as claimed in claim 1 wherein a first voltage condition selected by the change of the select pin is 4 to 5 volts a second voltage condition is 9 to 10 volts a third voltage condition is 12 to 15 volts and a use power is 5 to 24 watts 7 The uni
21. on the type of a product to be applied or can be separated using a connector The cable output terminal 320 is connected to the tip 400 and has a structure attachable detachable to from the tip The inner cable has the and lines along which electricity can flow and a select line for obtaining the state of the select pin 410 In the above it is effective that the and lines use 16 to 22 AWG lines depending on the amount of current and the select lines S1 to Sn use 24 to 28 AWG lines in order to reduce a thickness of the cable The external appearance of the cable has a shield as a conductor therein and is made from a material such as PVC but is not limited thereto The tip 400 includes a tip input terminal 410 connected to the output terminal of the cable a select pin 420 a tip output terminal 430 connected to a DC input terminal of a portable electronic device and a select information display unit 440 The tip input terminal 410 includes two and power pins and the select pins 420 whose number is decided depending on the number ofa voltage to be set The tip input terminal 410 has a shape of a connector that is easily attached detached to from the output terminal 320 of the cable Each of the select pins 420 has three states such as a shot circuit to which nothing is connected connection to the pole and connection to the pole Therefore for the N number of a select pin a tip having the 3N number of states
22. pparatuses with him or her usually called adaptors and has to purchase several adaptors for respective devices This will cause the user to suffer greater economic loss In an attempt to overcome these problems a universal power supply apparatus has been proposed The universal power supply apparatus refers to a power supply apparatus applicable to various kinds of portable electronic devices using one main unit In such universal power supply apparatus a detachable tip a cable etc which are differently applied depending on the shape of an input terminal of a device has to be first provided A method for setting a voltage suitable for an electronic device to be used should be then provided In a conventional universal power supply apparatus there is a method for setting a voltage of a device in a main unit using a dip switch a rotary switch or a resistor having a special shape as disclosed in U S Pat No 5 347 211 and for providing a tip or cable detachable from the main unit and mated with the shape of the input terminal of an electronic device to be used According to this method however a user has to perform two steps of finding the tip or cable that can be used in a portable electronic device and setting a proper voltage in the main unit Accordingly this method has a disadvantage that a user who is short of common sense on the electronic device has a difficulty in using the device In order to overcome this problem U S
23. provide the state of the select pin included in the tip to the output select unit of the main unit in addition to and lines seen in a common cable The cable 300 has one side connected to the main unit which can be fixed or detached according to applications and the order side connected to the tip which consists of a connector that can be attached detached to from the tip The universal power supply apparatus constructed above can be used as the universal DC DC adaptor if a cable suitable for the DC power provided in a vehicle an aircraft etc is formed in the input terminal 110 of the main unit and the universal power supply apparatus is designed as a boost type or buck type PWM circuit can be used as the universal AC DC adaptor if an AC connector for receiving the AC power as the input formed and the universal power supply apparatus is designed as a fly back circuit and can be used as the universal external type battery pack applicable to portable electronic devices if a battery and a circuit for controlling the battery are formed and the universal power supply apparatus is designed as the voltage boost type or buck type PWM circuit for receiving the battery DC power as the input In the universal power supply apparatus of the present invention electronic elements such as resistors diodes and condensers are collectively formed at one place of the main unit Thus there are advantages that a manufacturer can provide a small siz
24. r 80 As described above in the universal power supply appa ratus according to the present invention the amount of an output voltage and a voltage selection condition are not limited to a narrow range but can be changed unlimitedly depending on the type of an electronic device used For instance if resistors corresponding to the N number of select pins S1 to Sn are composed of the N number of resistor arrays R1 to Rn the 3N number of different voltages can be obtained using a tip having the 3N number of states FIG 3 shows an external appearance of the tip 400 having one select pin 420 and the cable 300 according to an embodiment of the present invention and connection units and the pin S1 of 420 substantially serving as the select pin are formed in the tip 400 Further the select information display unit 440 is formed in its external appear ance The select information display unit is divided into a numerical information display unit 441 and a color infor mation display unit 442 The numerical information display unit 441 is represented on the body of the tip and is fabricated to have 20 or more different numbers depending on the shape and voltage suitable for a DC input terminal of an electronic device The color information display unit 442 is represented at the end of a tip if it has an insulator at the end of the tip and is represented at the body of the tip otherwise FIG 4 to FIG 6 show universal power supply appar
25. ser manual Therefore helping a user who has a portable electronic device that is not represented in the user manual to select a tip suitable for him or her is color information A user having a portable electronic device not represented in the user manual will first find a tip physically suitable for a DC input terminal of the electronic device and if a found tip is used then determines whether a voltage is suitable for the electronic device based on color information The color information may include yellow red black and so on FIG 2 shows three states that can be represented by a tip when one select pin 420 is used FIG 2 a shows a short circuit state FIG 2 b shows a pole junction and FIG 2 c shows a pole junction As described above the select pin serves to change the voltage Two pins connected to the pole and pole are usually separately provided within the tip The output voltage depending on the use of the select pin as shown in FIG 2 will be described In the circuit using the PWM control IC 121 when a reference voltage of an error amplifier included in the feedback terminal of the PWM control IC is Vref an output voltage Vout is defined as Vref Ra Rb Rb Accordingly the three states that are represented when one select pin S1 of 420 and a resistor R1 of the output select unit 200 are used can be expressed into Equation 1 in case of the short circuit Equation 2 in case of the pole junction a
26. the construction of the SMPS circuit using PWM a voltage converter 120 consisting of acommon SMPS circuit having a PWM control IC 121 for comparing a reference voltage and a current state and producing an output that changes a pulse width to the gate terminal of a FET Q and the output select unit 200 having a circuit for changing the reference voltage inputted to the feedback terminal of the PWM control IC using information according to the connection location of the select pin 420 included in the tip 400 in the circuit having the power output terminal 130 The power input terminal 110 serves to apply the DC power outputted from the power supply At this time the DC power includes all DC power used in a vehicle an aircraft and a battery Therefore the shape of the input terminal connected to the input terminal of the present invention may include the shape of a cable used in a vehicle cigarette jack an air jack etc an AC power terminal for home and the DC power terminal such as a battery and a PCB pattern having the DC power obtained by an additional circuit though it is not a direct DC power As such the present invention can be applied to the power of various shapes The voltage converter 120 is the common SMPS circuit including a PWM control IC 121 which has the feedback terminal and the output terminal for comparing the reference voltage and a current state and then producing an output that changes the pulse width to the gate termi
27. versal power supply apparatus as claimed in claim 1 wherein the universal power supply apparatus operates as a DC DC adaptor using the DC power as an input power to the main unit 8 The universal power supply apparatus as claimed in claimed 1 wherein the universal power supply apparatus operates as an external type battery pack in which a battery and a battery control circuit are connected to the input terminal of the main unit 9 The universal power supply apparatus as claimed in claim 1 wherein the universal power supply apparatus operates as an AC DC adaptor using the AC power as an input power to the main unit 10 The universal power supply apparatus as claimed in claim 1 wherein the voltage converter comprises a PWM control IC being one of components of a SMPS circuit a FET being a switching device a diode an inductor or a transformer and condensers for smoothing voltages at unput and output sides 11 The universal power supply apparatus as claimed in claim 2 wherein a first voltage selected by the change of the select pin is 15 to 16 volts a second voltage is 18 to 20 volts and a use power is 60 to 90 watts 12 The universal power supply apparatus as claimed in claim 3 wherein a first voltage selected by the change of the 20 30 40 45 50 55 60 65 10 select pin is 15 to 16 volts a second voltage is 18 to 20 volts and a use power is 60 to 90 watts 13 The universal power supply apparatus as

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