公开(公告)号：EP1990887A1

公开(公告)日：2008-11-12

申请号：EP07290570.6

申请日：2007-05-07

Applicant: STMicroelectronics S.r.l. ,  STMicroelectronics S.A.

Inventor： Nebon, Jerome ,  Balmefrezol, Alexandre

IPC: H02J7/00

CPC classification number: H02J7/0065 ,  H02J2007/0062 ,  Y10T307/313 ,  Y10T307/533

Abstract: A power management unit ( 215 ) for a battery-operated electronic device ( 105 ) having a bus interface ( 110 ) for the interconnection with another electronic device ( 115;120 ), the power management unit comprising: an electric energy storage element ( L ) coupled between a battery ( 210 ) of the battery-operated electronic device and a voltage supply line ( VBUS ) of the bus interface, the electric energy storage element being operable to charge/discharge electric energy; a drive circuitry ( 220,M1,M2 ) arranged to control a charge/discharge of the electric energy storage element. The drive circuitry is operable to: cause an electric power supplied by the other electronic device through the voltage supply line to re-charge the battery; or, in case the other electronic device does not supply electric power, cause the battery supply electric power to the other electronic device through the voltage supply line. The power management unit is particularly adapted for battery-operated, mobile USB OTG devices.

Abstract translation: 一种用于电池供电的电子设备（105）的电源管理单元（215），具有用于与另一电子设备（115; 120）互连的总线接口（110），所述电源管理单元包括：电能存储元件 ）耦合在所述电池供电的电子设备的电池（210）和所述总线接口的电压供应线（VBUS）之间，所述电能存储元件可操作以对电能进行充电/放电; 布置成控制电能存储元件的充电/放电的驱动电路（220，M1，M2）。 所述驱动电路可操作以：通过所述电压供给线使由所述另一电子装置供给的电力对所述电池进行再充电; 或者在其他电子装置不供电的情况下，通过电压供给线使电池向其他电子装置供给电力。 电源管理单元特别适用于电池供电的移动USB OTG设备。

公开(公告)号：EP2031745A1

公开(公告)日：2009-03-04

申请号：EP07291047.4

申请日：2007-08-30

Applicant: STMicroelectronics S.r.l. ,  STMicroelectronics S.A.

Inventor： Nebon, Jerome ,  Balmefrezol, Alexandre ,  Platania, Giuseppe ,  Milazzo, Patrizia

IPC: H02M3/158 ,  H02J7/00

CPC classification number: H02M3/158

Abstract: A DC-DC voltage down-converter ( 140 ) for an electronic device ( 105 ) supplied by a battery ( 125 ) and having a bus interface ( 110 ) for the interconnection with another electronic device ( 120 ) capable of supplying electric power is provided. The DC-DC voltage down-converter includes a terminal coupled to a voltage supply line ( VS ) of the bus interface and operable to receive a input current ( Iusb ) from said another electronic device. The DC-DC voltage down-converter further includes an electric energy storage element ( L ) coupled between the battery and said terminal, the electric energy storage element being operable to store/release electric energy and a drive circuit ( 225 ) arranged to control the storage/release of the electric energy storage element, so as to cause an electric power generated by said input current supplied by said another electronic device trough the voltage supply line to re-charge the battery. The DC-DC voltage down-converter still further includes a input current feedback control circuit ( 240, 250 ) coupled to said terminal and arranged to monitor a value of said input current and generate a corresponding input current indication ( UCPWM ); said drive circuit is configured to control the store/release of the electric energy storage element according to said input current indication.

Abstract translation: 提供一种由电池（125）提供并具有用于与能够供电的另一电子设备（120）的互连的总线接口（110）的用于电子设备（105）的DC-DC电压下变频器（140） 。 DC-DC电压下变频器包括耦合到总线接口的电压供应线（VS）的端子，并可操作以从所述另一电子设备接收输入电流（Iusb）。 DC-DC电压下变频器还包括耦合在电池和所述端子之间的电能存储元件（L），所述电能存储元件可操作以存储/释放电能;以及驱动电路（225），其布置成控制 存储/释放电能存储元件，以便使由所述另一电子设备通过电压供应线供应的所述输入电流产生的电力对电池重新充电。 DC-DC电压下变频器还包括耦合到所述端子并被布置成监视所述输入电流的值并产生相应的输入电流指示（UCPWM）的输入电流反馈控制电路（240,250）。 所述驱动电路被配置为根据所述输入电流指示来控制电能存储元件的存储/释放。