Steven J Tumasz

US Patent:

8576596, Nov 5, 2013

Filed:

Oct 20, 2011

Appl. No.:

13/277773

Inventors:

Rais K. Miftakhutdinov - Cary NC, US
Lin Sheng - Raleigh NC, US
Jin Liang - Raleigh NC, US
John R. Wiggenhorn - Cary NC, US
Steven Tumasz - Chichester NH, US

Assignee:

Texas Instruments Incorporated - Dallas TX

International Classification:

H02M 7/44

US Classification:

363 98, 363 17

Abstract:

Various embodiments of the present invention provide voltage converters and methods for using such. As one example, a voltage converter is disclosed that includes a transformer with a first winding and a second winding. A voltage is applied to the first winding for a period that is followed by an OFF time. The voltage converter further includes an OFF time controller that is operable to adjust the OFF time based at least in part on a load current traversing the second winding.

US Patent:

20060245218, Nov 2, 2006

Filed:

Apr 28, 2005

Appl. No.:

11/116767

Inventors:

Steven Tumasz - Chichester NH, US

Assignee:

Astec International Limited - Kwun Tong, Kowloon

International Classification:

H02M 7/04

US Classification:

363089000

Abstract:

A switching power supply circuit has a power transformer having a core, a primary winding, and a secondary winding. A first switch has a control signal input and is connected to the primary winding of the power transformer. A synchronous rectifier has a control signal input and is connected to the secondary winding of the power transformer. A signal transformer has a primary winding and a secondary winding, and a first connection has a first end connected to the control signal input of the first switch and a second end connected to the primary winding of the signal transformer.

US Patent:

20090021962, Jan 22, 2009

Filed:

Jan 30, 2008

Appl. No.:

12/022965

Inventors:

Rais K. Miftakhutdinov - Cary NC, US
Lin Sheng - Raleigh NC, US
John R. Wiggenhorn - Cary NC, US
Jin Liang - Raleigh NC, US
Steven Tumasz - Chichester NH, US

Assignee:

Texas Instruments Incorporated - Dallas TX

International Classification:

H02M 3/335

US Classification:

363 17

Abstract:

Various embodiments of the present invention provide voltage converters and methods for using such. As one example, a voltage converter is disclosed that includes a transformer with a first winding and a second winding. A voltage is applied to the first winding for a period that is followed by an OFF time. The voltage converter further includes an OFF time controller that is operable to adjust the OFF time based at least in part on a load current traversing the second winding.

US Patent:

20160126850, May 5, 2016

Filed:

Nov 2, 2015

Appl. No.:

14/930301

Inventors:

- Dallas TX, US
Steven J. Tumasz - Chichester NH, US

International Classification:

H02M 3/335
H02M 1/36

Abstract:

Some implementations are directed to a A DC-to-DC converter that includes a power transformer having a primary side and a secondary side and a plurality of power transistors coupled to the primary side of the transformer. The converter also includes a secondary bias supply coupled to the secondary side of the transformer and a secondary side controller coupled to the secondary side of the transformer and configured to generate a feedback control signal based on a voltage level associated with the secondary side of the transformer. The secondary side controller receives operating power only from the secondary bias supply.

US Patent:

20140321170, Oct 30, 2014

Filed:

Apr 30, 2013

Appl. No.:

13/874056

Inventors:

- Dallas TX, US
Steven J. TUMASZ - Chichester NH, US

Assignee:

Texas Instruments Incorporated - Dallas TX

International Classification:

H02M 3/335

US Classification:

363 2109, 363 2111

Abstract:

Some implementations are directed to a A DC-to-DC converter that includes a power transformer having a primary side and a secondary side and a plurality of power transistors coupled to the primary side of the transformer. The converter also includes a secondary bias supply coupled to the secondary side of the transformer and a secondary side controller coupled to the secondary side of the transformer and configured to generate a feedback control signal based on a voltage level associated with the secondary side of the transformer. The the secondary side controller receives operating power only from the secondary bias supply.