Sean T Tarlton

US Patent:

20140021933, Jan 23, 2014

Filed:

Jul 20, 2012

Appl. No.:

13/554881

Inventors:

Jon Gladish - Jenkins Township PA, US
Thomas N. Mathes - Cary NC, US
Sean T. Tarlton - Pittsboro NC, US

Assignee:

FAIRCHILD SEMICONDUCTOR CORPORATION - San Jose CA

International Classification:

G05F 3/08

US Classification:

323311

Abstract:

One embodiment provides A DC-DC converter system that includes a high side switch and a low side switch coupled to a power supply, each switch is configured to transition from an on state to an off state and from an off state to an on state to deliver current to an inductor and a load. This embodiment also includes low side driver circuitry configured to control the conduction state of the low side switch and configured to drive the low side switch with a first gate driving signal during a first mode of operation and with a second gate driving signal during a second mode of operation. The first gate driving voltage is stronger than the second gate driving signal and the second gate driving signal is configured to cause a slower switch transition of the low side switch compared to the first gate drive control signal.

US Patent:

20170331363, Nov 16, 2017

Filed:

May 13, 2016

Appl. No.:

15/154497

Inventors:

- San Jose CA, US
Jeffrey Demski - Orefield PA, US
Thomas Mathes - Cary NC, US
Sean Tarlton - Pittsboro NC, US
Joseph Zbib - Apex NC, US

Assignee:

Altera Corporation - San Jose CA

International Classification:

H02M 1/32
H02M 3/158
H02M 1/00

Abstract:

A power converter circuit regulates an output voltage of a power train circuit and controls the current in the power train circuit. A current sensor circuit measures a current in the power train circuit. A hysteretic comparison circuit compares the current in the power train circuit to positive and negative current limits. The hysteretic comparison circuit causes a positive current in the power train circuit to decrease in a positive current limit mode in response to the positive current in the power train circuit reaching the positive current limit. The hysteretic comparison circuit causes a negative current in the power train circuit to decrease in a negative current limit mode in response to the negative current in the power train circuit reaching the negative current limit. The hysteretic comparison circuit prevents a pulse width modulation controller from controlling the power train circuit during the positive and negative current limit modes.