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WO2003038979A1 - Alimentation electrique ca et cc a double entree presentant une sortie cc programmable utilisant une retroaction optique a boucle unique - Google Patents

Alimentation electrique ca et cc a double entree presentant une sortie cc programmable utilisant une retroaction optique a boucle unique Download PDF

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Publication number
WO2003038979A1
WO2003038979A1 PCT/US2002/034749 US0234749W WO03038979A1 WO 2003038979 A1 WO2003038979 A1 WO 2003038979A1 US 0234749 W US0234749 W US 0234749W WO 03038979 A1 WO03038979 A1 WO 03038979A1
Authority
WO
WIPO (PCT)
Prior art keywords
circuit
power converter
output
output voltage
converter
Prior art date
Application number
PCT/US2002/034749
Other languages
English (en)
Inventor
Gilbert Macdonald
Garry Dubose
Chia Hua Wang
Original Assignee
Mobility Electronics Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US10/005,961 external-priority patent/US6643158B2/en
Priority claimed from US10/072,074 external-priority patent/US6700808B2/en
Application filed by Mobility Electronics Inc. filed Critical Mobility Electronics Inc.
Publication of WO2003038979A1 publication Critical patent/WO2003038979A1/fr

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/26—Power supply means, e.g. regulation thereof
    • G06F1/263—Arrangements for using multiple switchable power supplies, e.g. battery and AC
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
    • H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
    • H02J9/061—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for DC powered loads
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/10—Arrangements incorporating converting means for enabling loads to be operated at will from different kinds of power supplies, e.g. from AC or DC
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of DC power input into DC power output
    • H02M3/22—Conversion of DC power input into DC power output with intermediate conversion into AC
    • H02M3/24—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters
    • H02M3/28—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC
    • H02M3/325—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/33561—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having more than one ouput with independent control

Definitions

  • the present invention generally relates to the field of power converters, and more particularly to a dual input AC and DC to programmable DC output power converter.
  • Today's power adapters are typically AC-to-DC, or DC-to-DC power converters which are configured to either step-up or step-down the DC voltage input delivered to the mobile device.
  • AC-to-DC adapters for example, users can power most mobile devices by simply plugging the adapter into a simple AC wall outlet commonly found in most homes or offices.
  • DC-to-DC adapter when only DC input power is available, such as in an automobile or airplane, users can still power their mobile devices by simply using a standard, off-the- shelf DC-to-DC adapter.
  • both adapters are designed and tailored to provide a regulated DC output voltage, which typically range from between 5VDC to 30VDC depending on the kind of mobile device being powered.
  • a power converter that resolves the system management problems associated with carrying all of the different power supply components necessary to power a wide variety of mobile or portable devices.
  • a power converter would advantageously encompass serving the power supply needs of several different mobile devices, as it would supply a filtered and regulated DC output voltage in response to either an AC and DC input voltage.
  • users have the ability of providing power to several mobile devices of varying power requirements, simultaneously, regardless of whether the input voltage is AC or DC.
  • the present invention achieves technical advantages as a power converter capable of supplying dual DC output voltages derived from either an AC input voltage or a DC input voltage, and having a single loop feedback comprised of stacked photocouplers, one coupled to a respective converter.
  • the single feedback loop includes a separate photocoupler, one controlling an AC/DC converter, and the other controlling the DC/DC boost converter, which provides a cost efficient and technically preferable solution.
  • the power converter can be externally programmable to cover a wide range of voltage and current combinations, suitable for a wide variety of mobile product offerings.
  • the power converter also resolves the management problems associated with having several different interface components necessary to power a wide variety of mobile products.
  • the invention is a power converter having a first circuit adapted to receive an AC input voltage and provide a first programmable DC output voltage.
  • the power converter includes a second circuit adapted to provide a second programmable DC output voltage in response to a DC input voltage.
  • the power converter also includes a third circuit that, in response to receiving the first and second DC output voltages, generates a selectable DC output voltage at a first output.
  • the third circuit generally comprises a feedback circuit and is adapted to interface with a removable program module. This programming module feature allows users of the power converter to selectively establish the voltage level of the DC output voltage.
  • the feedback circuit also comprises the single feedback loop which includes a first and a second optical device comprising a pair of photocouplers connected in series (stacked).
  • the feedback circuit is adapted to regulate the selectable DC output voltage generated at the first output in response to the on and/or off status of either series photo-coupler.
  • the power converter also includes a fourth circuit that is coupled to first output. The fourth circuit provides a second DC output voltage as a second output which is independent of, and substantially lower than the selectable DC output voltage.
  • Figure 1A shows a block diagram of a dual input AC and DC power converter having dual DC voltage outputs in accordance with the present invention
  • Figure IB shows an exploded view of the converter with the detachable buck circuit
  • FIG 2 shows a schematic diagram of the power converter circuit as illustrated in Figure 1 in accordance with the present invention.
  • FIG. 3 shows a detailed schematic diagram of a DC-to-DC buck converter circuit in accordance with the present invention.
  • FIG. 1 A a block diagram of a dual input AC/DC power converter 10 having dual programmable DC voltage outputs in accordance with the present invention.
  • the dual input AC/DC power converter 10 comprises a power converter circuit 20 having an AC-to- DC converter 22, a DC-to-DC booster converter 24, a feedback circuit 26, a filter circuit 25 and a DC-to-DC buck converter 28.
  • the power converter circuit 20 is seen housed in housing 13 and advantageously provides a first programmable DC output voltage at DC output terminal 16 and a second programmable DC output voltage at terminal 18. Both of these DC output voltages may be generated as a function of both AC and DC input voltages.
  • the AC-to-DC converter 22 receives an AC signal via input terminal 12 and provides a regulated DC output voltage at node Nl.
  • the DC-to-DC booster converter 24 may receive a DC input voltage at its input via input terminal 14 and may also provide a regulated DC output voltage at node Nl.
  • Input terminals 12 and 14 are integrated into a single common connector 17 such that different power cords adapted to receive input power from different sources are received by the common connector 17. For instance, DC power from an airplane or car power source are wired to couple to input 12 and AC source is wired to couple to input 14.
  • the AC-to-DC converter 22 is adapted to generate a DC output voltage of between 15VDC and 24VDC in response to an AC input voltage at terminal 12 ranging between 90V AC and 265 VAC.
  • the DC-to-DC booster converter 24 is adapted to provide a DC output voltage which is substantially similar to that of converter 22, but which is generated in response to a DC input voltage supplied at input terminal 14.
  • DC-to-DC booster converter 24 is adapted to receive a voltage in the range of between 11VDC and 16VDC.
  • AC-to-DC conversion via AC-to-DC converter 22, allows users of the power converter 10 to power high-power mobile devices, such as a laptop computer wherever AC input power is available, such as in the home or office, for example.
  • the DC-to- DC booster converter 24 of the power converter 10 is capable of powering similar high-power devices by stepping up most low amplitude DC input signals, such as those found in automobile and/or airplane environments.
  • filter circuit 25 has its input tied to the respective outputs of the converter 22 and 24.
  • the filter circuit is adapted to provide a filtered DC output voltage at second node N2, which, thereafter, feeds output terminal 16, at an output power of 75 watts, for example.
  • the single feedback circuit 26 is shown coupled to the output of filter circuit 25 at node N2.
  • the feedback 26 circuit through a single feedback loop, regulates the voltage level of the filtered DC output voltages generated by both converters 22 and 24.
  • the feedback circuit 26 is adapted to receive a removable programming module that allows mobile device users to provide a selectable DC output voltage at output 16 via node N2.
  • the programming module comprises a key 15 comprising a resistor, wherein different associated values of the resistor establish different associated DC output voltages at output 16.
  • the power converter 10 may be adapted to power a variety of different mobile electronic devices, having different associated power requirements.
  • the power converter's 10 programming module may also be adapted to provide the additional function of output current limiting.
  • the DC-to-DC buck converter 28 has its input coupled at node N2, providing a second DC output voltage that is then fed to output terminal 18, having an output power of 10 watts, for example.
  • buck converter 28 discreetly steps down the filtered DC voltage and produces a second DC output voltage at a separate output terminal 18.
  • the buck converter 28 steps down the filtered DC output voltage to a range of about 3VDC and 15VDC.
  • this second DC output voltage generated by converter 28 is independent of, and substantially lower than the DC output voltage at terminal 16. This allows users of the present invention to power not only a high-power peripheral, such as a laptop computer, but also, a second, low-power peripheral, such as a cell phone, PDA, and the like.
  • the present invention allows for these peripherals to be powered simultaneously by a single converter, regardless if the input voltage is AC or DC.
  • the buck converter 28 is physically detachable from the main housing 13 as shown in Figure IB, allowing different buck circuits providing different output voltages to be selectively attached to housing 13 and tap the DC output voltage from output terminal 18.
  • the power converter circuit 20 of the dual input AC/DC power converter 10 as depicted in Figure 1 in accordance with an exemplary embodiment of the present invention.
  • the power converter circuit 20 in a preferred embodiment, comprises three separate converters: AC-to-DC power converter 22, DC/DC boost converter 24, and DC-to-DC buck converter 28.
  • AC-TO-DC CONVERTER AC-TO-DC CONVERTER
  • the AC-to-DC power converter 22 includes a true offline switcher which is configured in a fly-back topology. Full-wave rectification of an AC input signal, received at input terminal 12, occurs using a full-wave bridge rectifier BDl and a filter capacitor CI, which creates a DC voltage bus from which the switcher operates. Inductor LI offers additional EMI filtering of the AC signal after the signal has been rectified through the full-wave bridge.
  • the AC-to-DC converter 22 also includes a main controller IC1 configured as a current mode pulse-width modulator (PWM). Main controller IC1 is also configured to have a single-ended output with totem pole driver transistors coupled thereto.
  • PWM pulse-width modulator
  • the AC-to-DC power converter 22 has a main power switch Ql which drives the main transformer TI .
  • the transformer TI, Schottky diode Dll, and filter capacitors C24 and C25 combine to provide the DC output voltage at node Nl .
  • filter circuit 25 allows for additional filtering of the
  • the filter circuit 25 itself comprises inductor L3, capacitor C26 and transformer NF1.
  • the filter circuit 25 produces a filtered DC output voltage at output 16 having less than lOOmv peak-to-peak noise and ripple.
  • the feedback circuit 26 through a single feedback loop, is capable of regulating the filtered DC output voltages provided by the converters 22 and 24.
  • the feedback circuit 26 is also adapted to be coupled to a removable programming module having a key 15, comprising resistor R53.
  • the present invention allows users to selectively program the DC output voltage later received at output terminal 16.
  • the feedback circuit 26 includes a photocoupler circuit comprising a pair of photocouplers PHI and PH3 connected in series (i.e., stacked), each being coupled to the outputs of operational amplifiers IC4-A and IC4-B.
  • these photocouplers are arranged along the feedback loop of the feedback circuit 26 with photocoupler PHI and PH3 coupled respectively to converters 22 and 24.
  • the feedback circuit 26 efficiently regulates the filtered DC output voltage provided at node N2. Moreover, by stacking the photo-couplers, the present invention also allows the power converter 10 to maintain proper input/output isolation between respective terminals 12 and 14 and output terminal 16.
  • the output current limiting function of converter 22 is accomplished via integrated circuit IC4A, resistors R33, R37, R38, and R39 and programming resistor R54.
  • zener diode ZD2 is set at 25V such that when in avalanche mode it causes the transistor side of photocoupler PH2 to bias transistor Ql into the on state.
  • transistor Q3 pulls low pin 1 of integrated controller ICland pulls the operating duty cycle of the integrated controller towards 0%. This takes the DC output voltage to 0 volts.
  • transistor Q2 is also forced on which then forces these two transistors become latched. If transistors Ql and Q2 are latched, input power must be recycled in order for the power converter 10 to be turned on again.
  • the DC-to-DC converter 24 is configured in a boost topology and utilizes the same kind of integrated controller, IC2, as used in converter 22.
  • transistor Q8 acts as the main power switch and diode D6 as the main rectifier.
  • inductor L2 is adapted to function as a power boost inductor, which is comprised of a toroid core-type inductor. It should be understood that the cathode leads of diodes Dl 1 and D8 are connected, forming an ORed configuration, requiring only one output filter. Advantageously, this eliminates the board space needed for a second set of filter capacitors.
  • the DC-to-DC converter 24 is also designed to operate at a frequency of around 80KHZ.
  • the operating frequency is set by resistor R13 and capacitor C7.
  • the operating frequency of the DC-to-DC converter 24 are set by resistor R28 and capacitor C28.
  • the DC-to-DC converter 24 includes an over- voltage protection circuit comprising zener diode ZD2, resistor R23, R24, R48, transistor Q415, and silicon-controlled rectifier SCI.
  • Zener diode ZD2 sets the over-voltage protection point (OVP) which is preferably set at 25VDC. Generally, there is no current flowing through resistor R48. If, however, when zener diode ZD2 begins to conduct current, the drop across R48 is significant enough to bias transistor Q6 on, pulling its collector terminal high, and thereby turning silicon controlled rectifier SCI on. When silicon control rectifier SCI is on, it pulls pin 1 of the integrated controller IC2 low.
  • the silicon controlled rectifier SCI functions as a power latch circuit that requires that input power be recycled in order to turn on the power converter 10 if a voltage above 25 VDC is detected at node Nl .
  • the temperature of the housing 13 of the power converter 10 is monitored using a thermistor NTC3. If, for example, there is a corresponding increase in the temperature of the housing 13, it will result in a decrease in the resistive value of thermistor NTC3, thereby causing transistor Q9 to turn on and pull low pin 1 of integrated circuit IC2 of converter 24. Moreover, this causes the photo-coupler PH2 to be biased enough to activate a latch circuit comprising transistors Ql and Q2 that will shutdown the power converter 22.
  • the power converter's 10 thermal protection feature is adapted to operate regardless of whether an AC or DC input voltage is being received at their respective input terminals.
  • FIG. 3 shows a detailed schematic diagram of the DC-to-DC buck converter 28 in accordance with the present invention.
  • the buck converter 28 has an integrated circuit controller ICl, similar to converters 22 and 24, which is adapted to generate an on-time duty cycle to power transistor switch Ql.
  • the operating frequency of controller ICl is set by capacitor C6, which is coupled between pin 4 of ICl and ground, and resistor Rl, which is coupled between pins 4 and 8.
  • the diode Dl functions comprises a Schottky diode and functions as "catch" diode.
  • Inductor LI is a output power inductor and couples the gate of power transistor Ql to V out .
  • Fuse FI is shown coupled between V m and the drain terminal of power transistor Ql, and advantageously provides current protection to buck- converter 28.
  • the input V ⁇ n of the buck converter 28 is coupled to the output of filter circuit 25 at node N2, wherein V m receives the filtered DC output voltage therefrom.
  • the buck converter 28 provides a second DC output voltage at V out , coupled to output terminal 18.
  • the buck convert 28 discreetly steps down the filtered DC output voltage and provides a second DC output voltage at output terminal 18 which is independent of, and substantially lower than the DC output voltage at output terminal 16.
  • the DC output voltage of the buck converter 28 enables users of the present invention to power low-power peripherals, such as, cell phones, PDAs, and/or similar mobile devices.
  • the buck convert 28 may also be adapted to provide a DC output voltage at output terminal 18 ranging between 3VDC and 15VDC, selectively determined as a function of the chosen value of resistor Rl used in the particular buck converter 28, with a total power delivery of 10 watts, for example.
  • the buck converter 28 may be housed in a separate, detachable program module that enables users to selectively program the DC output voltage at terminal 18 as a function of different associated buck converter modules.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Theoretical Computer Science (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Dc-Dc Converters (AREA)

Abstract

L'invention concerne un convertisseur électrique ca/cc (10) à double entrée présentant deux entrées (12, 24) conçues pour recevoir une entrée ca et une entrée cc et pour fournir une sortie de tension cc (16) pouvant être sélectionnée et une deuxième sortie cc (18). Le convertisseur électrique ca/cc (10) à double entrée comprend un circuit convertisseur électrique (20) présentant un convertisseur ca/cc (22), un convertisseur amplificateur cc/cc (24), un circuit de retour (26), un circuit filtrant (25) et un convertisseur abaisseur de tension cc/cc (28). De manière avantageuse, le convertisseur électrique résout de nombreux problèmes de gestion du système et comporte tous les composants d'interface différents nécessaires à l'alimentation d'une gamme étendue de produits mobiles nécessitant une alimentation électrique soit ca soit cc. En outre, le circuit de retour (26) comprend une boucle de retour unique présentant des photocoupleurs empilés, l'un (PH1) commandant le convertisseur ca/cc (22), et l'autre (PH3) commandant le convertisseur amplificateur cc/cc (24), afin de sélectionner une tension de sortie cc globale.
PCT/US2002/034749 2001-10-31 2002-10-30 Alimentation electrique ca et cc a double entree presentant une sortie cc programmable utilisant une retroaction optique a boucle unique WO2003038979A1 (fr)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
US33578501P 2001-10-31 2001-10-31
US60/335,785 2001-10-31
US10/005,961 2001-12-03
US10/005,961 US6643158B2 (en) 2001-10-31 2001-12-03 Dual input AC/DC to programmable DC output converter
US10/072,074 US6700808B2 (en) 2002-02-08 2002-02-08 Dual input AC and DC power supply having a programmable DC output utilizing a secondary buck converter
US10/072,074 2002-02-08

Publications (1)

Publication Number Publication Date
WO2003038979A1 true WO2003038979A1 (fr) 2003-05-08

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PCT/US2002/034749 WO2003038979A1 (fr) 2001-10-31 2002-10-30 Alimentation electrique ca et cc a double entree presentant une sortie cc programmable utilisant une retroaction optique a boucle unique

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2416606A (en) * 2004-07-26 2006-02-01 Wolfson Microelectronics Plc Power supply circuit for portable battery powered device
WO2007089569A1 (fr) * 2006-01-26 2007-08-09 Mobility Electronics, Inc. Convertisseur ca/cc présentant une entrée détectable unique
US7642671B2 (en) 2006-04-28 2010-01-05 Acco Brands Usa Llc Power supply system providing two output voltages

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5414610A (en) * 1993-06-21 1995-05-09 Ast Research, Inc. Universal power converter with single, shared power transformation circuit
EP1001513A2 (fr) * 1998-11-16 2000-05-17 Alcatel Convertisseur de puissance à découpage universel
US6137280A (en) * 1999-01-22 2000-10-24 Science Applications International Corporation Universal power manager with variable buck/boost converter
EP1107437A2 (fr) * 1999-12-01 2001-06-13 Hewlett-Packard Company, A Delaware Corporation Alimentation de puissance
EP1122873A2 (fr) * 2000-02-07 2001-08-08 Nihon Protector Co., Ltd. Régulateur à découpage sans interruption

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5414610A (en) * 1993-06-21 1995-05-09 Ast Research, Inc. Universal power converter with single, shared power transformation circuit
EP1001513A2 (fr) * 1998-11-16 2000-05-17 Alcatel Convertisseur de puissance à découpage universel
US6137280A (en) * 1999-01-22 2000-10-24 Science Applications International Corporation Universal power manager with variable buck/boost converter
EP1107437A2 (fr) * 1999-12-01 2001-06-13 Hewlett-Packard Company, A Delaware Corporation Alimentation de puissance
EP1122873A2 (fr) * 2000-02-07 2001-08-08 Nihon Protector Co., Ltd. Régulateur à découpage sans interruption

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2416606A (en) * 2004-07-26 2006-02-01 Wolfson Microelectronics Plc Power supply circuit for portable battery powered device
GB2416606B (en) * 2004-07-26 2009-04-22 Wolfson Microelectronics Plc Power supply circuit for portable battery powered device
WO2007089569A1 (fr) * 2006-01-26 2007-08-09 Mobility Electronics, Inc. Convertisseur ca/cc présentant une entrée détectable unique
US7388305B2 (en) 2006-01-26 2008-06-17 Mobility Electronics, Inc. AC/DC converter having single detectable input
US7642671B2 (en) 2006-04-28 2010-01-05 Acco Brands Usa Llc Power supply system providing two output voltages
US8212386B2 (en) 2006-04-28 2012-07-03 ACCO Brands Corporation Power supply system

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