Jason E Cuadra

US Patent:

6449175, Sep 10, 2002

Filed:

Aug 11, 2000

Appl. No.:

09/637421

Inventors:

Jason Cuadra - San Jose CA
Manolo Mariano M. Melgarejo - Quizon, PH

Assignee:

Astec International Limited

International Classification:

H02M 704

US Classification:

363 89, 323251

Abstract:

A switched magamp post regulator in a power converter incorporating a switched set mode control circuit which minimizes the power loss associated with the control transistor of a set mode magamp post regulator is disclosed. Power loss in set mode is minimized by switching the control transistor on and off synchronously with the main transformer. The incorporation of set mode and switching allows the use of less expensive ferrite core materials with increased efficiency for operation at higher frequencies and higher temperatures.

US Patent:

7061778, Jun 13, 2006

Filed:

Jun 7, 2004

Appl. No.:

10/862223

Inventors:

Arthur B. Odell - Cupertino CA, US
Richard L. Hester - San Jose CA, US
Jason E. Cuadra - San Jose CA, US

Assignee:

Power Integrations, Inc. - San Jose CA

International Classification:

H02M 3/335

US Classification:

363 2101

Abstract:

A technique for extending the operating range of a flyforward converter to low input voltages. In one aspect, power converter includes a positive input supply rail and a negative input supply rail. A power converter input voltage is to be applied between the positive and negative input supply rails. A flyback energy transfer element having a flyback input winding and a forward energy transfer element having a forward input winding are also included. The flyback and forward input windings are coupled between the positive and negative input supply rails. Voltage control circuitry coupled to the forward energy transfer element is also included to reduce a voltage across the forward input winding, substantially to zero, when the power converter input voltage falls below a first threshold value.

US Patent:

7209371, Apr 24, 2007

Filed:

May 12, 2006

Appl. No.:

11/432968

Inventors:

Arthur B. Odell - Cupertino CA, US
Richard L. Hester - San Jose CA, US
Jason E. Cuadra - San Jose CA, US

Assignee:

Power Integrations, Inc. - San Jose CA

International Classification:

H02M 3/335
H02M 7/537

US Classification:

363 2101, 363131

Abstract:

A technique for extending the operating range of a flyforward converter to low input voltages. In one aspect, power converter includes a positive input supply rail and a negative input supply rail. A power converter input voltage is to be applied between the positive and negative input supply rails. A flyback energy transfer element having a first input winding and a forward energy transfer element having a forward input winding are also included. The flyback and forward input windings are coupled between the positive and negative input supply rails. Voltage control circuitry coupled to the forward energy transfer element is also included to reduce a voltage across the forward input winding, substantially to zero, when the power converter input voltage falls below a first threshold value.

US Patent:

7403402, Jul 22, 2008

Filed:

Mar 13, 2007

Appl. No.:

11/724004

Inventors:

Arthur B. Odell - Cupertino CA, US
Richard L. Hester - San Jose CA, US
Jason E. Cuadra - San Jose CA, US

Assignee:

Power Integrations, Inc. - San Jose CA

International Classification:

H02M 3/335

US Classification:

363 2101, 363 2104, 363 2112

Abstract:

A technique for extending the operating range of a flyforward converter to low input voltages. In one aspect, power converter includes a positive input supply rail and a negative input supply rail. A power converter input voltage is to be applied between the positive and negative input supply rails. A flyback energy transfer element having a flyback input winding and a forward energy transfer element having a forward input winding are also included. The flyback and forward input windings are coupled between the positive and negative input supply rails. Voltage control circuitry coupled to the forward energy transfer element is also included to reduce a voltage across the forward input winding, substantially to zero, when the power converter input voltage falls below a first threshold value.

US Patent:

7535735, May 19, 2009

Filed:

Sep 13, 2004

Appl. No.:

10/940061

Inventors:

Jason E. Cuadra - San Jose CA, US
Arthur B. Odell - Cupertino CA, US
William Michael Polivka - Campbell CA, US

Assignee:

Power Integrations, Inc. - San Jose CA

International Classification:

H02M 3/335

US Classification:

363 2115, 323907, 323902

Abstract:

Techniques to compensate for parameter variations in a feedback circuit are disclosed. In one embodiment, a regulator circuit includes an energy source coupled to output a generated current in response to a control current. A feedback resistor is coupled to an output of the regulator circuit. The feedback resistor is coupled to conduct a feedback current responsive to the output of the regulator circuit. A current amplifier is coupled to the feedback resistor to generate the control current in response to the feedback current. A compensation network is coupled to the current amplifier to adjust the control current in response to an extrinsic parameter of the regulator circuit. The compensation network includes a transistor and first, second and third resistors. The first resistor is coupled between the feedback resistor and a collector of the transistor. The second resistor coupled between the collector and the base of the transistor.

US Patent:

7675761, Mar 9, 2010

Filed:

Jun 1, 2007

Appl. No.:

11/809375

Inventors:

Jason E. Cuadra - San Jose CA, US
Simon Krugly - Santa Clara CA, US
Peter Vaughan - San Jose CA, US

Assignee:

Power Integrations, Inc. - San Jose CA

International Classification:

H02M 3/335

US Classification:

363 2112

Abstract:

A flyback power supply method and apparatus is disclosed. An apparatus according to aspects of the present invention includes an energy transfer element having a primary winding and first and second output windings. The first and second output windings are coupled to produce first and second output values, respectively. A primary switch is coupled to the primary winding. A control circuit is coupled to the primary switch to regulate a sum of the first and second output values. A steering circuit having first and second output switches is also included. The first and second output switches are coupled to the first and second output windings, respectively, to regulate a ratio of the first output value to the second output value. The first output switch is coupled to block current through the first output winding and the second output switch is coupled to block current through second output winding. At least one of the first and second output switches is coupled to be closed when the primary switch is opened.

US Patent:

7813150, Oct 12, 2010

Filed:

Apr 22, 2009

Appl. No.:

12/428406

Inventors:

Jason E. Cuadra - San Jose CA, US
Arthur B. Odell - Cupertino CA, US
William M. Polivka - Campbell CA, US

Assignee:

Power Integrations, Inc. - San Jose CA

International Classification:

H02M 3/335

US Classification:

363 2115, 323902, 323907

Abstract:

Techniques to compensate for parameter variations in a feedback circuit are disclosed. In one embodiment, a regulator circuit includes an energy source coupled to output a generated current in response to a control current. A feedback resistor is coupled to an output of the regulator circuit. The feedback resistor is coupled to conduct a feedback current responsive to the output of the regulator circuit. A current amplifier is coupled to the feedback resistor to generate the control current in response to the feedback current. A compensation network is coupled to the current amplifier to adjust the control current in response to an extrinsic parameter of the regulator circuit. The compensation network includes a transistor and first, second and third resistors. The first resistor is coupled between the feedback resistor and a collector of the transistor. The second resistor coupled between the collector and the base of the transistor.

US Patent:

8614615, Dec 24, 2013

Filed:

Dec 1, 2010

Appl. No.:

12/958258

Inventors:

Jason E. Cuadra - San Jose CA, US
John R. Estabrooks - Richmond, CA
Raymond K. Orr - Kanata, CA

Assignee:

Power Integrations, Inc. - San Jose CA

International Classification:

H01F 27/30
H01F 27/28
H02M 3/335
H02M 5/16

US Classification:

336198, 336170, 336208, 336222, 363 2104, 363 2107, 363171

Abstract:

An energy transfer assembly with tuned leakage inductance and common mode noise compensation is disclosed. An example energy transfer assembly for use in a resonant power converter includes a first winding wound around a bobbin mounted on a magnetic core. The first winding has a first number of layers proximate to a first end along a length of the bobbin and a second number of layers proximate to a second end along the length of the bobbin. The energy transfer assembly also includes a second winding wound around the bobbin. The second winding has a third number of layers proximate to the first end along the length of the bobbin and a fourth number of layers proximate to the second end along the length of the bobbin. The first and second windings are wound around the bobbin such that at least a portion of one of the first and second windings overlaps at least a portion of an other one of the first and second windings around the bobbin. A degree of overlap between the first and second windings is non-uniform between the first and second ends along the length of the bobbin such that a ratio of the first number to the third number does not equal a ratio of the second number to the fourth number.