Source: http://www.google.com/patents/US7394675?dq=ELIST
Timestamp: 2016-06-01 01:41:40
Document Index: 284477242

Matched Legal Cases: ['art.\n5', 'art.\n9', 'art.\n13', 'art.\n17', 'Application No. 2005', 'art 12', 'art 15', 'art 12', 'art 15', 'art 12', 'art 12', 'art 15', 'art 15', 'art 120', 'art 130', 'art 150', 'art 151', 'art 170', 'art 180', 'art 120', 'art 150', 'art 120', 'art 120', 'art 130', 'art 150', 'art 120', 'art 150', 'art 180', 'art 150', 'art 170', 'art 180', 'art 151', 'art 150', 'art 120', 'art 171', 'art 180', 'art 120', 'art 150', 'art 120', 'art 130', 'art 120', 'art 150', 'art 130', 'art 130', 'art 130', 'art 180', 'art 170', 'art 150', 'art 180', 'art 151', 'art 111', 'art 151', 'art 171', 'art 130', 'art 120', 'art 151', 'art 151', 'art 120', 'art 151', 'art 151', 'art 171', 'art 170', 'art 170', 'art 171', 'art 170', 'art 130', 'art 171', 'art 171', 'art 171', 'art 151', 'art 150', 'art 170', 'Application No. 200610125742']

Patent US7394675 - Power supplying apparatus and power supplying method - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inPatentsA power supply operable from a plurality of alternating current inputs had having protection from abnormal operation. The power supply includes a switchable rectifier and a voltage to voltage converter. Protection circuits switch off at least one of the rectifier and the converter if the rectified voltage...http://www.google.com/patents/US7394675?utm_source=gb-gplus-sharePatent US7394675 - Power supplying apparatus and power supplying methodAdvanced Patent SearchPublication numberUS7394675 B2Publication typeGrantApplication numberUS 11/500,994Publication dateJul 1, 2008Filing dateAug 9, 2006Priority dateAug 29, 2005Fee statusPaidAlso published asCN1925297A, US20070047274Publication number11500994, 500994, US 7394675 B2, US 7394675B2, US-B2-7394675, US7394675 B2, US7394675B2InventorsKyung-hoon HwangOriginal AssigneeSamsung Electronics Co., Ltd.Export CitationBiBTeX, EndNote, RefManPatent Citations (11), Non-Patent Citations (1), Referenced by (2), Classifications (12), Legal Events (4) External Links: USPTO, USPTO Assignment, EspacenetPower supplying apparatus and power supplying method
US 7394675 B2Abstract
A power supply operable from a plurality of alternating current inputs had having protection from abnormal operation. The power supply includes a switchable rectifier and a voltage to voltage converter. Protection circuits switch off at least one of the rectifier and the converter if the rectified voltage exceeds a predetermined voltage value and/or a current through the converter exceeds a predetermined current value. The protection circuits include latch circuits to prevent cyclic operation.
1. A power supplying apparatus comprising:
a rectifying part rectifying an input alternating current to output a direct current;
a smoothing part connectable with the rectifying part in a plurality of current paths for smoothing a voltage of the direct current input from the rectifying part through each of the current paths;
a voltage selecting part selecting a magnitude of the smoothed voltage by controlling at least one of the plurality of current paths; and
a smoothing protection part estimating the magnitude of the smoothed voltage and suspending the direct current output from the rectifying part if the estimated magnitude of the smoothed voltage is more than a predetermined voltage value.
2. The power supplying apparatus of claim 1, wherein the smoothing protection part comprises a first operation maintaining part which maintains an operation of suspending the output direct current.
3. The power supplying apparatus of claim 1, further comprising:
a transforming part converting the magnitude of the smoothed voltage to output another voltage;
a switching part determining the magnitude of the another voltage by controlling a flow of a current input to the transforming part; and
a switching protection part estimating a magnitude of the current flowing in the switching part and suspending an operation of the switching part if the estimated magnitude of the current flowing through the switching part is more than a predetermined current value.
4. The power supplying apparatus of claim 3, wherein the switching protection part comprises an operation maintaining part maintaining the suspending of the switching part.
5. The power supplying apparatus of claim 3, wherein the switching protection part suspends the direct current output from the rectifying part if the estimated magnitude of the current flowing through the switching part is more than the predetermined current value.
6. The power supplying apparatus of claim 3, wherein the smoothing protection part suspends the operation of the switching part if the estimated magnitude of the smoothed voltage more than the predetermined voltage value.
7. A power supplying apparatus, comprising:
a smoothing part connectable with the rectifying part in a plurality of current paths and smoothing a voltage of the direct current;
a voltage selecting part selecting a magnitude of the smoothed voltage by controlling at least one of the plurality of current paths;
a switching protection part estimating a magnitude of the current flowing in the switching part and suspending an operation of the switching part if the estimated magnitude of the current is more than a predetermined value.
8. The power supplying apparatus of claim 7, wherein the switching protection part comprises an operation maintaining part which maintains the suspending of the switching part.
9. A method of operating a power supplying apparatus comprising a rectifying part rectifying an input alternating current to output a direct current; a smoothing part connectable with the rectifying part in a plurality of current paths smoothing a voltage of the direct current inputted from the rectifying part; and a voltage selecting part selecting a magnitude of the smoothed voltage by controlling at least one of the plurality of current paths, the method comprising:
estimating the magnitude of the smoothed voltage; and
suspending the direct current output from the rectifying part if the estimated magnitude of the smoothed voltage is more than a predetermined voltage value.
10. The power supplying method of claim 9, wherein the suspending of the output direct current comprises maintaining the suspending the output direct current.
11. The power supplying method of claim 9, wherein the power supplying apparatus further comprises a transforming part converting the magnitude of the smoothed voltage to another voltage; a switching part determining the magnitude of the another voltage by controlling a flow of a current input to the transforming part, the power supplying method further comprising:
estimating a magnitude of the current flowing in the switching part; and
suspending an operation of the switching part if the estimated magnitude is more than a predetermined current value.
12. The power supplying method of claim 11, wherein the suspending of the operation of the switching part comprises maintaining the suspending of the operation of the switching part.
13. The power supplying method of claim 11, further comprising suspending the direct current output from the rectifying part if the magnitude of the current flowing in the switching part is more than the predetermined current value.
14. The power supplying method of claim 11, further comprising suspending the operation of the switching part if the magnitude of the smoothed voltage is more than the predetermined voltage value.
15. A method of operating a power supplying apparatus including a rectifying part rectifying an input alternating current to output a direct current; a smoothing part connectable with the rectifying part in a plurality of current paths smoothing a voltage of the direct current; a voltage selecting part selecting a magnitude of the smoothed voltage by controlling at least one of the plurality of current paths; a transforming part converting the magnitude of the smoothed voltage to output another voltage; and a switching part determining a magnitude of the another voltage by controlling a flow of current input to the transforming part, the method comprising:
suspending an operation of the switching part if the estimated magnitude of the current flowing through the switching part is more than a predetermined value.
16. The power supplying method of claim 15, wherein the suspending of the operation of the switching part comprises maintaining the suspending the switching part.
17. A power supply apparatus, comprising:
a first voltage converter selectively operable from a plurality of input alternating current voltages and outputting a first direct current voltage;
a second voltage converter converting the first direct current voltage to a second direct current voltage; and
a protection circuit switching off the first voltage converter, if a current through the second voltage converter exceeds a predetermined current, and switching off the second voltage converter, if the first direct current voltage exceeds a predetermined voltage.
18. The power supply apparatus of claim 17, wherein the protection circuit includes a latch maintaining the first voltage converter switched off.
19. The power supply apparatus of claim 17, wherein the protection circuit includes a latch maintaining the second voltage converter switched off.
20. The power supply apparatus of claim 17, wherein:
the first voltage converter comprises a plurality of SCRs which rectify the input alternating current voltage; and
the protection circuit outputs a control signal to turn off the SCRs if the first direct current voltage exceeds the predetermined voltage value and/or the current through the second voltage converter exceeds the predetermined current value.
21. The power supply apparatus of claim 17, wherein:
the second voltage converter comprises a switch to switch the current through the second voltage converter to output the second direct current voltage; and
the protection circuit outputs a control signal to disable the switching of the switch if the first direct current voltage exceeds the predetermined voltage value and/or the current through the second voltage converter exceeds the predetermined current value.
22. The power supply apparatus of claim 17, wherein:
the first voltage converter comprises a plurality of SCRs which rectify the input alternating current voltage;
the protection circuit outputs a first control signal to turn off the SCRs if the first direct current voltage exceeds the predetermined voltage value and/or the current through the second voltage converter exceeds the predetermined current value and outputs a second control signal to disable the switching of the switch if the first direct current voltage exceeds the predetermined voltage value and/or the current through the second voltage converter exceeds the predetermined current value. Description
This application claims the benefit of Korean Patent Application No. 2005-79524, filed Aug. 29, 2005, in the Korean Intellectual Property Office, the disclosure of which is incorporated herein by reference.
Aspects of the present invention relate to a power supplying apparatus and a power supplying method, and more particularly, to a power supplying apparatus and a power supplying method which protect a circuit safely against over-voltage and over-current.
A power supplying apparatus supplies proper power necessary to operate a circuit apparatus such as a computer system. Such circuit apparatus often needs direct current power as power, and consequently the power supplying apparatus rectifies input alternating current power and outputs direct current power.
Where the power supplying apparatus uses commercial alternating current power as an input, the input voltage may be a voltage such as 110V or 220V. Therefore, in order to accommodate both 110V and 220V input voltages, the power supplying apparatus uses the input 220V voltage “as is” and the input 110V input is doubled. Such a conventional power supplying apparatus is illustrated in FIG. 1.
The power supplying apparatus shown in FIG. 1 includes a rectifying part 12, a voltage selector 13, and a smoothing part 15. The rectifying part 12 includes diodes 12 a, 12 b, 12 c and 12 d and rectifies input alternating current power 11. The smoothing part 15 includes capacitors 15 a and 15 b that correspond to the input power 11 of 110V and 220V, for example, and charges energy of the current rectified by the rectifying part 12 into each capacitor 15 a and 15 b. The voltage selector 13 is disposed in a predetermined current path between the rectifying part 12 and the smoothing part 15, and serves as a switch to pass or interrupt the current. As shown in FIG. 1, if the voltage selector 13 is open, a voltage proportional to a magnitude of the input power is charged in the series combination of the capacitors 15 a and 15 b. However, if the voltage selector 13 is closed, a voltage proportional to a magnitude of the input power voltage is charged in each of two capacitors 15 a and 15 b. In this case, a voltage corresponding to double the magnitude of the input voltage is charged into the series combination of capacitors 15 a and 15 b. That is, where the input voltage is 110V, the power supplying apparatus outputs a direct current voltage proportional to double the input voltage.
However, although the input voltage is 220V, the voltage selector 13 may be closed due to a user's mistake or erroneous operation of the apparatus. In this case, the capacitors 15 a and 15 b may be damaged due to a voltage 1.4 times 220V being applied to each of the capacitors 15 a and 15 b. The power supplying apparatus 1 universally uses a switch-mode power supply (SMPS) which is advantageous in terms of efficiency. The switch-mode power supplying apparatus 1 further includes a MOSFET 17 a, a transformer 18, and diodes 19 a and 19 b. The power supplying apparatus 1 converts a magnitude of the voltage applied to the smoothing part 15 through the transformer 18 to output a voltage Vo with turning on and off the MOSFET 17 a using pulse width modulation (PWM).
According to the switch-mode power supplying apparatus 1, if the voltage selector 13 is closed due to user's mistake and an input voltage of 220V is supplied, an over-current may result in the MOSFET 17 a, potentially resulting in an explosion. Further, even if the input voltage is applied consistent with the position of the voltage selector 13, if a problem related to feedback loop occurs upon operating the PWM or gate on time in the MOSFET 17 a is raised due to degradation of a PWM controller IC, the MOSFET 17 a may be also damaged.
Accordingly, an aspect of the present invention is to provide a power supplying apparatus and a power supplying method with superior stability against over-voltage and over-current.
The foregoing and/or other aspects of the present invention may be achieved by providing a power supplying apparatus comprising: a rectifying part rectifying an input alternating current to output a direct current; a smoothing part connectable with the rectifying part in a plurality of current paths and smoothing a voltage of the direct current input from the rectifying part through each of the current paths; a voltage selecting part selecting a magnitude of the smoothed voltage by controlling at least one of the plurality of current paths; and a smoothing protection part estimating the magnitude of the smoothed voltage and suspending the direct current output from the rectifying part if the estimated magnitude of the voltage is determined to be more than a predetermined voltage value.
According to an aspect of the present invention, the smoothing protection part comprises a first operation maintaining part which maintains the suspending of the output direct current.
According to an aspect of the present invention, the power supplying apparatus further comprises: a transforming part converting the magnitude of the smoothed voltage to output another voltage; a switching part determining the magnitude of the another voltage by controlling a flow of a current input to the transforming part; and a switching protection part estimating a magnitude of the current flowing in the switching part and suspending an operation of the switching part if the estimated magnitude of the current is more than a predetermined value.
According to an aspect of the present invention, the switching protection part comprises a second operation maintaining part which maintains the suspending of the switching part.
According to an aspect of the present invention, the switching protection part estimates the magnitude of the current flowing in the switching part and suspends the direct current output from the rectifying part if the estimated magnitude of the current flowing in the switching part is more than the predetermined current value.
According to an aspect of the present invention, the smoothing protection part estimates the magnitude of the smoothed voltage and suspends the operation of the switching part if the estimated magnitude of the smoothed voltage is more than the predetermined voltage value.
The foregoing and/or another aspects of the present invention may be achieved by providing a power supplying apparatus, comprising: a rectifying part rectifying an input alternating current to output a direct current; a smoothing part connectable with the rectifying part in a plurality of current paths and smoothing a voltage of the direct current input from the rectifying part; a voltage selecting part selecting a magnitude of the smoothed voltage by controlling at least one of the plurality of current paths; a transforming part converting the magnitude of the smoothed voltage to output another voltage; a switching part determining a magnitude of the another voltage by controlling a flow of the current input to the transforming part; and a switching protection part estimating a magnitude of the current flowing in the switching part and suspending an operation of the switching part if the estimated magnitude of the current flowing in the switching part is determined to be more than a predetermined current value.
According to an aspect of the present invention, the switching protection part comprises an operation maintaining part which maintains the suspending of the switching part.
The foregoing and/or another aspects of the present invention may be achieved by providing a method of operating a power supplying apparatus comprising a rectifying part rectifying an input alternating current to output a direct current; a smoothing part connectable with the rectifying part in a plurality of current paths and smoothing a voltage of the direct current input from the rectifying part; a voltage selecting part selecting a magnitude of the smoothed voltage by controlling at least one of the plurality of current paths, the method comprising: estimating the magnitude of the smoothed voltage; and suspending the output of direct current from the rectifying part if the magnitude of the estimated voltage is more than a predetermined voltage value.
According to an aspect of the present invention, the suspending of the output of the direct current comprises maintaining the suspending the direct current output.
According to an aspect of the present invention, the power supplying apparatus further comprises a transforming part converting the magnitude of the smoothed voltage to output another voltage; a switching part determining the magnitude of the another voltage by controlling a flow of the current input to the transforming part, the power supplying method further comprising: estimating a magnitude of the current flowing in the switching part; and suspending the operation of the switching part if the magnitude of the estimated current is more than a predetermined current value.
According to an aspect of the present invention, the suspending of the operation of the switching part comprises maintaining the suspending of the switching part.
According to an aspect of the present invention, the power supplying method further comprises suspending the direct current output from the rectifying part if the magnitude of the current flowing in the switching part is more than the predetermined current value.
According to an aspect of the present invention, the power supplying method further comprises suspending the operation of the switching part if the magnitude of the smoothed voltage is more than the predetermined voltage value.
The foregoing and/or another aspects of the present invention may be achieved by providing a method of operating a power supplying apparatus including a rectifying part rectifying an input alternating current to output a direct current; a smoothing part connectable with the rectifying part in a plurality of current paths for smoothing a voltage of the direct current input from the rectifying part; a voltage selecting part selecting a magnitude of the smoothed voltage by controlling at least one of the plurality of current paths; a transforming part converting the magnitude of the smoothed voltage to output another voltage; and a switching part determining the magnitude of the another voltage by controlling a flow of the current input to the transforming part, the method comprising: estimating a magnitude of the current flowing in the switching part; and suspending the operation of the switching part if the magnitude of the estimated current is more than a predetermined value.
According to an aspect of the present invention, the suspending of the operation of the switching part comprises maintaining the suspending the switching part.
FIG. 1 is a schematic diagram showing a structure of a conventional power supplying apparatus using a method of doubling an input voltage.
FIG. 2 is a block diagram showing a structure of a power supplying apparatus according to an embodiment of the present invention.
FIG. 3 is a circuit diagram showing a circuit implementing the power supplying apparatus shown in FIG. 2.
FIG. 4 is a flow chart showing an operation of the power supplying apparatus of shown in FIGS. 2 and 3.
FIG. 2 is a block diagram showing a structure of a power supplying apparatus 100 according to an embodiment of the present invention. The power supplying apparatus 100 supplies power to an electronic device, such as for example, a computer system. The power supplying apparatus 100 includes a rectifying part 120, a voltage selecting part 130, a smoothing part 150, a smoothing protection part 151, a switching part 170 and a transforming part 180. An alternating current is input to the rectifying part 120 where the alternating current is rectified and output as a direct current. The smoothing part 150 is connected with the rectifying part 120 in a plurality of current paths for smoothing a voltage of the direct current input from the rectifying part 120. The voltage selecting part 130 selects a magnitude of the voltage smoothed by the smoothing part 150 by controlling the plurality of current paths between the rectifying part 120 and the smoothing part 150. The transforming part 180 converts the magnitude of the voltage smoothed by the smoothing part 150 and outputs the converted voltage. The switching part 170 determines a magnitude of the converted voltage by controlling a flow of a current input to the transforming part 180. The smoothing protection part 151 may estimate a magnitude of the voltage smoothed by the smoothing part 150 and suspend the output of direct current from the rectifying part 120 if the estimated magnitude of the voltage is determined to be more than a predetermined voltage value. The power supply apparatus 100 may further comprise a switching protection part 171 estimating a magnitude of the current input to the transforming part 180 and suspending the output of the converted voltage if the current input to the transforming part is determined to be more than a predetermined current value.
FIG. 3 is a circuit diagram showing an example circuit implementing the power supplying apparatus 100. The rectifying part 120 includes SCRs 120 a and 120 b and diodes 120 c and 120 d and rectifies input alternating power 110 to output direct current. The smoothing part 150 includes capacitors 150 a and 150 b and charges energy of the current rectified by the rectifying part 120 into each of the capacitors 150 a or 150 b. The voltage selecting part 130 is disposed in a predetermined current path between the rectifying part 120 and the smoothing part 150 and serves as a switch for passing or interrupting a current. As shown in FIG. 3, if the voltage selecting part 130 is open, a voltage proportional to a magnitude as the input power is charged into the series combination of the capacitors 150 a and 150 b. If the voltage selecting part 130 is closed, the voltage proportional to the magnitude as the input power is charged into each of the capacitors 150 a and 150 b. With the voltage selecting part closed, a voltage corresponding to double the input voltage is charged into the series combination of the capacitors 150 a and 150 b. That is, with the voltage selecting part 130 closed and an input voltage of 110V, the voltage across the capacitors 150 a and 150 b is about the same as the voltage with an input voltage of 220V with the voltage selecting part open.
The power supplying apparatus 100 operates in a switch mode manner and further includes a MOSFET 170 a, a transforming part 180 and diodes 190 a and 190 b. The MOSFET 170 a is an example of the switching part 170 shown in FIG. 2. The power supplying apparatus 100 converts the magnitude of the voltage applied by the smoothing part 150 to the transforming part 180 to an output voltage Vo with turning on or off the MOSFET 170 a using a switching technique, such as for example, pulse width modulation.
The smoothing protection part 151 includes resistors 151 a and 151 b sensing a voltage across the capacitors 150 a and 150 b, a resistor 151 e and a zener diode 151 c providing a reference voltage, a comparator 151 d having respective inputs to which a voltage across the resistor 151 b and the reference voltage provided by the zener diode 151 c are applied, and a diode 151 f for determining a current direction of an output in the comparator 151 d. The output of the comparator 151 d is connected with respective trigger inputs of the SCRs 120 a and 120 b via the diode 151 f. The power supplying apparatus 100 further includes a Vcc supplying part 111 a, a diode 111 b and a resistor 111 c supplying a voltage Vcc for the smoothing protection part 151 and the switching protection part 171.
The reference voltage of the zener diode 151 c is set correspondingly with a normal voltage across the capacitors 150 a and 150 b. The resistance values of the resistors 151 a and 151 b are set so that when the power supplying apparatus 100 operates normally, a voltage across the resistor 151 b is lower than the reference voltage of the zener diode 151 c and in this case the output of the comparator 151 d is High, thereby causing SCRs 120 a and 120 b to operate as diodes, resulting in normal rectifying operation.
If the power supplying apparatus 100 operates abnormally, as in a case where the voltage selecting part 130 is closed and the input voltage of 220V, the voltage across the resistor 151 b will be higher than the reference voltage of the zener diode 151 c and in this case the output of the comparator 151 d is Low, thereby causing the SCRs 120 a and 120 b to be turned off interrupting the current output by the rectifying part 120. Consequently, over-voltage is prevented from being charged into the capacitors 150 a and 150 b. The smoothing protection part 151 further includes a latch-up circuit holding the output of the comparator 151 Low. The latch-up circuit includes a transistor 151 h and a resistor 151 i. The latch-up circuit prevents the abnormal operation and the protection operation from being cyclic. Without the latch-up circuit the smoothing protection part 151 operates to interrupt the current flowing in the rectifying part 120, the voltage charged into the capacitor 150 b is lowered so that the smoothing protection part 151 terminates the protection operation, the voltage charged into the capacitor 150 b rises, and the smoothing protection part 151 again carries out the protection operation.
The power supplying apparatus 100 may further include a switching protection part 171 estimating a magnitude of the current flowing in the switching part 170 and suspending operation of the switching part 170 if the estimated magnitude of the current is determined to be more than a predetermined value. The switching protection part 171 includes a resistor 170 b detecting a current flowing in a drain and a source of the MOSFET 170 a, resistors 171 d and 171 e providing a reference voltage of the over-current protection circuit, a comparator 171 c having respective inputs to which the over-current protection reference voltage across the resistor 171 e and a voltage across the resistor 170 b are input, and a diode 171 f determining a flow of a gate voltage signal to the MOSFET 170 a. The power supplying apparatus 100 further includes a PWM controller (not shown) supplying the gate voltage signal to the MOSFET 170 a. The resistance values of resistors 171 d and 171 e are set correspondingly with the resistance value of the resistor 170 b and a reference current of the MOSFET 170 a. If the power supplying apparatus 100 operates normally, the voltage across the resistor 170 b is set lower than the over-current protection reference voltage, and in this case the output of the comparator 171 c is High and the gate voltage signal to the MOSFET 170 a from the PWM controller (not shown) is applied to the gate of the MOSFET 170 a and the switching part 170 operates normally.
If the voltage selecting part 130 is closed with the input voltage of 220V, or the power supplying apparatus 100 operates abnormally as in cases of occurrence of a problem related to feedback loop of PWM operation or degradation of a PWM controller IC, the voltage across the resistor 171 b becomes higher than the over-current protection reference voltage, and in this case the output of the comparator 151 d is Low, thereby causing the gate voltage signal from the PWM controller to be interrupted by the output of the comparator 171 c via the diode 171 f. Therefore, the operation of the MOSFET 170 a is suspended to interrupt the current flowing through the drain and the source of the MOSFET 170 a so that the MOSFET 170 a is protected.
The switching protection part 171 further includes a latch-up circuit holding the output of the comparator 171 c Low. The latch-up circuit of the switching protection part 171 may include a transistor 171 a and a resistor 171 b. The latch-up circuit of the switching protection part 171 prevents the abnormal operations and the protection operation from being cyclic, in a similar manner as the latch-up circuit of the smoothing protection part 151 prevents cyclic operation.
The output of the comparator 151 d and the output of the comparator 171 c are mutually connected. Consequently, where the output in any one of the comparator 151 d and the comparator 171 c is Low, the smoothing part 150 and switching part 170 are both protected.
FIG. 4 is a flow chart showing an operation of the power supplying apparatus 100. Power is supplied to the power supplying apparatus 100 at operation S110 and a voltage level across the capacitors 150 a and 150 b is detected at operation S111. A determination of whether the detected voltage level is more than a reference voltage is made at operation S112, and an output of the comparator 151 d is set as Low at operation S113, if the detected voltage level is more than the reference voltage, thereby causing the SCRs 120 a and 120 b to be turned off at operation S114. Therefore, the over-voltage across the capacitors 150 a and 150 b is interrupted at operation S115.
If the detected voltage level across the capacitors 150 a and 150 b is not more than the reference voltage, a determination of whether a current flowing in the MOSFET 170 a is more than a reference current is made at operation S116. If the current flowing through the MOSFET 170 a is more than the reference current, an output of the comparator 171 c is set as Low at operation S117, thereby causing a gate voltage signal of the MOSFET 170 a to be interrupted at operation S118. Therefore, over-current is prevented from flowing in the MOSFET 170 a. As described above, the present invention provides a power supplying apparatus and a power supplying method with superior stability against over-voltage and over-current.
Patent CitationsCited PatentFiling datePublication dateApplicantTitleUS4837672Aug 30, 1988Jun 6, 1989Storage Technology CorporationSwitched mode power supplyUS6055167 *Aug 10, 1998Apr 25, 2000Custom Power Systems, Inc.Pulse width modulated boost converter integrated with power factor correction circuitUS6449180 *Nov 2, 2000Sep 10, 2002Samsung Electronics Co., Ltd.World wide power supply apparatus that includes a relay switch voltage doubling circuitJP2000316280A Title not availableJP2003299351A Title not availableJP2004187391A Title not availableKR890020072A Title not availableKR900007410B1 Title not availableKR910005463B1 Title not availableKR980005693A Title not availableKR19980020277A Title not available* Cited by examinerNon-Patent CitationsReference1Office Action issued on Feb. 22, 2008 by the Chinese Patent Office for Chinese Application No. 200610125742.2Referenced byCiting PatentFiling datePublication dateApplicantTitleUS8498136 *Aug 29, 2007Jul 30, 2013Mitsubishi Electric CorporationAC-DC converter and compressor driving apparatus and air conditioning apparatus using the sameUS20110019452 *Aug 29, 2007Jan 27, 2011Mitsucishi Electric CorporationAc-dc converter and compressor driving apparatus and air conditioning apparatus using the same* Cited by examinerClassifications U.S. Classification363/142, 363/85, 363/81, 363/54International ClassificationH02M1/10, H02H7/125Cooperative ClassificationH02H7/1255, H02M1/10, H02H7/1225European ClassificationH02H7/125C, H02H7/122C, H02M1/10Legal EventsDateCodeEventDescriptionAug 9, 2006ASAssignmentOwner name: SAMSUNG ELECTRONICS CO., LTD., KOREA, REPUBLIC OFFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:HWANG, KYUNG-HOON;REEL/FRAME:018174/0533Effective date: 20060808Aug 26, 2008CCCertificate of correctionDec 16, 2011FPAYFee paymentYear of fee payment: 4Dec 24, 2015FPAYFee paymentYear of fee payment: 8RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services