Source: http://www.google.com.tw/patents/US7791314
Timestamp: 2013-05-23 08:50:10
Document Index: 329560089

Matched Legal Cases: ['Application No. 200410062105', 'Application No. 2004087906', 'Application No. 2004087906', 'Application No. 093119744', 'Application No. 93102793', 'Application No. 04014686', 'Application No. 04002904', 'Application No. 04002904', 'Application No. 04006551', 'Application No. 04014686', 'Application No. 04002904', 'Application No. 04006551', 'Application No. 2005', 'Application No. 2003354266', 'Application No. 2004194913', 'Application No. 10', 'Application No. 10', 'application No. 10', 'Application No. 04014686', 'Application No. 12193860', 'Application No. 92130623']

�M�Q US7791314 - Power management topologies to control power between a DC power source and ... - Google �M�Q�j�M �Ϥ� �a�� Play YouTube �s�D Gmail ���ݵw�� ��h »�i���M�Q�j�M | �������� | �n�J�i���M�Q�j�M�M�QA power supply topology according to one embodiment includes a first path coupled to a controllable DC power source, a second path coupled to a rechargeable battery, and a third path coupled to a system load, the three paths coupled to a common node. The topology may further include a unidirectional...http://www.google.com.tw/patents/US7791314?utm_source=gb-gplus-share�M�Q US7791314 - Power management topologies to control power between a DC power source and one or more batteries to a system load���}��US7791314 B2�X���������v�ӽЮѽs��12/054,743�o�G���2010�~9��7���ӽФ��2008�~3��25�� �u���v���2000�~9��21����L���}�M�Q��CN1330070CCN1578047AEP1494332A2EP1494332A3US7348760US8120312US20040178766US20080231117US20100327813�o��HConstantin BucurVlad Mihail Popescu-StanestiMarian NiculaeDaryl Nees��M�Q�v�HO2Micro International Limited ���M�Q������320/132��ڱM�Q������H02J7/34H02J3/00H02J7/04H02M3/00H02J7/02H02J9/06H02J7/00H01M10/46 �X�@����H02J7/0068H02J2007/0067H02J7/0057H02J7/0013H02J7/0018H02J7/34H02J7/0027H02J9/061Y02T10/7055H02J7/02H02M2001/0045H02J2007/0059 �ڬw������H02J7/00CH02J7/00LH02J7/34H02J9/06BH02J7/02H02J7/00G3H02J7/00C6H02J7/00C1C�ѦҤ��m�M�Q�ޥ� (96)�D�M�Q�ޥ� (85)�~���s�����M�Q�ӼЧ� ���M�Q�ӼЧ��M�Q����T�� �ڬw�M�Q��Power management topologies to control power between a DC power source and one or more batteries to a system loadUS 7791314 B2�K�n A power supply topology according to one embodiment includes a first path coupled to a controllable DC power source, a second path coupled to a rechargeable battery, and a third path coupled to a system load, the three paths coupled to a common node. The topology may further include a unidirectional switch coupled to the first path and a selectively unidirectional switch coupled to the second path. The topology may further include a power management control circuit including a wake up circuit having a comparison circuit and an output decision circuit. Of course, many alternatives, variations, and modifications are possible without departing from this embodiment.
14. The power supply topology according to claim 8, wherein said comparison circuit comprises an error amplifier, said error amplifier is further configured to receive said first signal and said second signal and provide said comparison output signal. ����
The DC to DC converter 104 b may be any variety of converters controlled by any variety of control signals along path 303 from the power management control circuit 130. In one embodiment, the DC to DC converter 104 b may be a buck converter having a high side switch, a low side switch, and an LC filter as is known in the art. The control signal from the power management circuit 130 may be a pulse width modulated (PWM) signal. The width of the PWM signal controls the duration of the ��switch ON�� state (high side switch ON and low side switch OFF) and ��switch OFF�� state (high side switch OFF and low side switch ON) and hence the output voltage and current level of the DC to DC converter 104 b. Turning to FIGS. 4 through 8, various embodiments of power supply systems consistent with the invention are illustrated having a controllable adapter 104 a as the controllable DC power source 104 and two batteries (Battery A and B). As such, the embodiments of FIGS. 4 through 8 have one power conversion due to the controllable adapter 104 a to supply power to the system load 110 and the battery 105. The one step power conversion embodiments may be used independently of, or together with, the earlier detailed buffer battery power supply mode enabling both the battery and controllable DC power source to provide power to the system load 110.
providing all the necessary adapter current up to a maximum output current level of the adapter or up to the power supply limits of the system load 110, and if requested to provide charging current to charge the battery source 105; Limiting the total charging current delivered to the battery 105 during a charging mode to the difference between the maximum output current level of the adapter 104 a and the required current of the system load 110; providing the maximum charging current to each battery (Battery A and B) as long as the maximum charging voltage level has not been reached for any of the batteries; providing up to the maximum charging current to the lowest voltage battery as long as the maximum charging voltage has not been reached for any of the batteries; and providing a set maximum supply voltage to the system load 110 when no battery is present or no charge request is received. Those skilled in the art will recognize various ways that such functionality of the control circuit 411 portion of the decision circuit 16 may be accomplished through hardware only, software only, or some combination thereof. For instance, with hardware the control circuit 411 may include a plurality of error amplifiers to compare signals ISYS, IAD, ICDB, ICDA, VFB_SYS, VFB_B, and VFB_A with an associated maximum threshold level for each monitored parameter. The plurality of error amplifiers may be configured as an analog ��wired-OR�� topology such that the error amplifier that first detects a condition exceeding the associated maximum level controls the command signal to the controllable adapter 104 a. An appropriate output signal may then be sent to the controllable adapter 104 a, e.g., to lessen an output power parameter of the adapter 104 a if a maximum threshold limit is reached.
When the output decision circuit 1612 provides the comparison output signal from the comparison circuit 1718 to the switch SW2A1, the switch SW2A1 is responsive to this signal to limit the charging current level provided to Battery A to the wake up current level. In one embodiment, the switch SW2A1 may provide a constant current flow to Battery A equal to the wake up charging current level. The comparison output signal may be an analog signal and the switch SW2A1 may be responsive to this analog signal to enter an intermediate conduction state. As used herein, an ��intermediate conduction state�� means a state that at least somewhat limits current flowing from one terminal to another terminal of the switch. As such, the switch SW2A1 in an intermediate conduction state may limit current provided to battery A to a wake up current level when the battery A is deeply discharged. In one instance, the switch SW2A1 may behave like an error amplifier controlled resistor when it receives the comparison output signal from the comparison circuit 1718.
When the output decision circuit 1612 provides the selector output signal, the switch SW2A1 is responsive to this signal to be either ON or OFF. The signal provided by the selector circuit may be a digital signal such that if the digital signal is a digital one, switch SW2A1 may be ON and if the digital signal is a digital zero, switch SW2A1 may be OFF. When switch SW2A1 is ON in response to the selector output signal, the switch SW2A1 may be in a full conduction state. As used herein, a ��full conduction state�� means a state that does not appreciably limit current flowing from one terminal to another terminal of the switch. Therefore, if switch SW2A1 is ON in response to the selector output signal, normal charging current levels may then be provided to Battery A. Therefore, the comparison output signal, e.g., an analog signal in one embodiment, may be utilized to control switch SW2A1 when Battery A is deeply discharged and hence charging current may be limited to a wake up charging current level. In addition, the selector output signal, e.g., a digital signal in one embodiment, may be utilized to control switch SW2A1 and provide higher normal charging current levels to Battery A.
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