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Flavius Lupu

from Campbell, CA
Age ~50
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Also known as:
S Lupu
Connected to:
Aurelia Lupu, 96Catalin Lupu, 56Chris F Lupu, 45Constantin C Lupu, 82Darrell W Lupu, 53Ioana Lupu, 46Linda L Lupu, 44Loredana Lupu, 43Michael S Lupu, 54Mircea Lupu, 71

Flavius Lupu Phones & Addresses

  • Campbell, CA
  • 1570 San Tomas Aquino Rd, San Jose, CA 95130
  • 1570 San Tomas Aquino Rd APT 41, San Jose, CA 95130

Work

Company: O2micro inc Sep 2004 Position: Sr. analog ic design engineer

Education

School / High School: Universitatea „Politehnica” din București

Skills

Ic • Power Management • Analog Circuit Design • Mixed Signal • Integrated Circuit Design • Analog • Semiconductors • Cmos • Microelectronics • Asic • Verilog • Simulations • Circuit Design • Embedded Systems • Hardware Architecture • Fpga • Low Power Design • Microcontrollers • Semiconductor Industry

Languages

English

Interests

Motorcycling • Cooking • Exercise • Reading • Gourmet Cooking • Sports

Industries

Research

Resumes

Resumes

Flavius Lupu Photo 1

Director Of Engineering

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Location:
1570 San Tomas Aquino Rd, San Jose, CA 95130
Industry:
Research
Work:
O2Micro Inc since Sep 2004
Sr. Analog IC design engineer
Education:
Universitatea „Politehnica” din București
MF4
Skills:
Ic
Power Management
Analog Circuit Design
Mixed Signal
Integrated Circuit Design
Analog
Semiconductors
Cmos
Microelectronics
Asic
Verilog
Simulations
Circuit Design
Embedded Systems
Hardware Architecture
Fpga
Low Power Design
Microcontrollers
Semiconductor Industry
Interests:
Motorcycling
Cooking
Exercise
Reading
Gourmet Cooking
Sports
Languages:
English

Publications

Us Patents

Protection Circuit With Timer

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US Patent:
8248259, Aug 21, 2012
Filed:
Jan 16, 2009
Appl. No.:
12/321257
Inventors:
Constantin Bucur - Sunnyvale CA, US
William Densham - Los Gatos CA, US
Jiun Heng Goh - Sunnyvale CA, US
Flavius Lupu - San Jose CA, US
Assignee:
O2Micro, Inc - Santa Clara CA
International Classification:
G08B 21/00
US Classification:
340638
Abstract:
A protection circuit includes a detection block, a timer and a protection enable block. The detection block is used to compare a monitoring signal with a reference signal and generate an alert signal if a difference between the monitoring signal and the reference signal exceeds a threshold for a first predetermined duration. The timer coupled to the detection block is used to generate an enabling signal for a second predetermined duration in response to the alert signal. The protection enable block coupled to the timer is used to generate a triggering signal for a first time duration determined by the second predetermined duration in response to the enabling signal so as to perform a protection function.

Capacity Detector For Detecting Capacity Of An Energy Storage Unit

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US Patent:
8446142, May 21, 2013
Filed:
Dec 31, 2008
Appl. No.:
12/319077
Inventors:
Constantin Bucur - Sunnyvale CA, US
Jiun Heng Goh - Sunnyvale CA, US
Flavius Lupu - San Jose CA, US
Assignee:
O2Micro, Inc. - Santa Clara CA
International Classification:
H03H 1/00
H02J 7/04
US Classification:
323367, 320162
Abstract:
A capacity detector for detecting capacity of an energy storage unit includes a first and a second buffers and a voltage divider. The first buffer is used for generating a first threshold reference according to a first adjustable reference which is predetermined based upon chemistry of the energy storage unit. The second buffer is used for generating a second threshold reference according to a second adjustable reference which is predetermined based upon chemistry of the energy storage unit. The voltage divider coupled to the first buffer and the second buffer is used for dividing a voltage across the first threshold reference and the second threshold reference and for generating capacity references indicating capacity percentages of the energy storage unit according to a voltage versus capacity characteristic of the energy storage unit.

Systems And Methods For Cell Balancing

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US Patent:
8461806, Jun 11, 2013
Filed:
Oct 15, 2007
Appl. No.:
11/974530
Inventors:
Flavius Lupu - San Jose CA, US
Constantin Bucur - Sunnyvale CA, US
Xiaojun Zeng - Shanghai, CN
Kalyi Sheng - Shanghai, CN
Anquan Xiao - Shanghai, CN
Assignee:
O2Micro Inc - Santa Clara CA
International Classification:
H02J 7/00
US Classification:
320122, 320132
Abstract:
A cell balancing circuit comprises a first cell having a first voltage, a second cell in series with the first cell and having a second voltage that is greater than the first voltage, and a bypass path in parallel with the second cell for enabling a bypass current for the second cell if a difference between the first voltage and the second voltage is greater than a predetermined threshold. The bypass current is enabled for a balancing time period that is proportional to the difference between the first voltage and the second voltage.

Systems And Methods For Balancing Battery Cells

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US Patent:
8598844, Dec 3, 2013
Filed:
Oct 21, 2011
Appl. No.:
13/278555
Inventors:
William Densham - Los Gatos CA, US
Constantin Bucur - Sunnyvale CA, US
Flavius Lupu - San Jose CA, US
Jiun Heng Goh - Sunnyvale CA, US
Stefan Maireanu - Sunnyvale CA, US
Assignee:
O2Micro, Inc. - Santa Clara CA
International Classification:
H02J 7/00
US Classification:
320116, 320124, 320136, 363142, 363147, 323251, 323332
Abstract:
In a power converter, a primary winding receives an input power. In addition, multiple secondary windings transform the input power into multiple charging currents to charge a set of cells via a set of paths. The multiple secondary windings further balance the set of cells based on the charging currents. A ratio between a first turn number of a first secondary winding of the secondary windings and a second turn number of a second secondary winding of the secondary windings is determined by a nominal voltage ratio between two corresponding cells of the set of cells.

Systems And Methods For Cell Balancing

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US Patent:
20090079391, Mar 26, 2009
Filed:
Sep 25, 2007
Appl. No.:
11/903850
Inventors:
Flavius Lupu - San Jose CA, US
Constantin Bucur - Sunnyvale CA, US
Xiaojun Zeng - Shanghai, CN
Kaiyi Sheng - Shanghai, CN
Anquen Xiao - Shanghai, CN
International Classification:
H02J 7/00
US Classification:
320122
Abstract:
A cell balancing circuit comprises a first cell having a first voltage, a second cell in series with the first cell and having a second voltage that is greater than the first voltage, and a bypass path in parallel with the second cell for enabling a bypass current for the second cell if a difference between the first voltage and the second voltage is greater than a predetermined threshold. The bypass current is enabled for a balancing time period that is proportional to the difference between the fist voltage and the second voltage.

Monitoring And Control Circuit For Adjusting Current

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US Patent:
20100327829, Dec 30, 2010
Filed:
Dec 15, 2008
Appl. No.:
12/316690
Inventors:
Constantin Bucur - Sunnyvale CA, US
Jiun Heng Goh - Sunnyvale CA, US
Flavius Lupu - San Jose CA, US
International Classification:
G05F 1/10
H03K 5/22
H02M 11/00
US Classification:
323282, 327 63, 327103
Abstract:
A monitoring and control circuit comprises a sense block, a first and a second comparators, and a control module. The current sense block is coupled to a switch for generating a monitoring signal indicative of a current flowing through the switch. The first comparator coupled to the sense block is operable for comparing the monitoring signal to a first threshold and for providing a first signal according to a first comparison result between the monitoring signal and the first threshold. The second comparator coupled to the sense block is operable for comparing the monitoring signal to a second threshold and for providing a second signal according to a second comparison result between the monitoring signal and the second threshold. The control module coupled to the first comparator and the second comparator provides a control signal for controlling the switch according to the first signal and the second signal so as to adjust the current.

Charging Systems With Cell Balancing Functions

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US Patent:
20110101916, May 5, 2011
Filed:
Nov 5, 2009
Appl. No.:
12/613333
Inventors:
William DENSHAM - Los Gatos CA, US
Constantin BUCUR - Sunnyvale CA, US
Flavius LUPU - San Jose CA, US
Jiun Heng GOH - Sunnyvale CA, US
Stefan MAIREANU - Sunnyvale CA, US
International Classification:
H02J 7/00
US Classification:
320116
Abstract:
In a power converter, a primary winding receives an input power. In addition, multiple secondary windings transform the input power into multiple charging currents to charge a set of cells via a set of paths. The multiple secondary windings further balance the set of cells based on the charging currents. A ratio between a first turn number of a first secondary winding of the secondary windings and a second turn number of a second secondary winding of the secondary windings is determined by a nominal voltage ratio between two corresponding cells of the set of cells.

Battery Monitoring System With A Switching Mode Topology

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US Patent:
20120081126, Apr 5, 2012
Filed:
Sep 30, 2010
Appl. No.:
12/895024
Inventors:
Stefan MAIREANU - Sunnyvale CA, US
William DENSHAM - Los Gatos CA, US
Jiun Heng GOH - Sunnyvale CA, US
Flavius LUPU - San Jose CA, US
Constantin BUCUR - Sunnyvale CA, US
International Classification:
G01N 27/416
US Classification:
324433
Abstract:
A battery monitoring system for a battery including multiple battery cells is disclosed. The battery monitoring system includes multiple first switch sets coupled across the battery cells respectively, an energy storage element, and a comparator coupled to the energy storage element via a second switch set. The energy storage element samples cell voltages of the battery cells via the first switch sets respectively. The comparator compares a respective cell voltage with a first reference signal to determine whether a fault condition occurs on a respective battery cell. The second switch set and one of the first switch sets are turned on alternately.
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Flavius Lupu from Campbell, CA, age ~50 Get Report