公开(公告)号：US20250079852A1

公开(公告)日：2025-03-06

申请号：US18462344

申请日：2023-09-06

Applicant: DELL PRODUCTS L.P.

Inventor： Tsung-Cheng Liao ,  Wei-Cheng Yu ,  Merle Jackson Wood III ,  Chin Jui Liu ,  Tun-Chieh Liang ,  Chi-Che Wu

IPC: H02J7/00

Abstract: A power adapter includes a flyback converter and a buck converter. If a first device is a preferred device, then power is allocated to the first device up to a first value. If a second device is plugged in, then power is re-allocating to the first device up to a second value and up to a third value to the second device. A total of the second value and the third value is up to the first value.

公开(公告)号：US20170179831A1

公开(公告)日：2017-06-22

申请号：US14973456

申请日：2015-12-17

Applicant: Dell Products L.P.

Inventor： Wei Cheng Yu ,  Tsung-Cheng Liao ,  Wen-Yung Chang ,  Merle Jackson Wood, III ,  Tun-Chieh Liang

IPC: H02M3/335

CPC classification number: H02M3/33569 ,  H02M2001/0022

Abstract: A zero voltage switching method for a flyback converter featuring a transformer with first and second primary windings and corresponding turns ratios, N1 and N2, includes rectifying and filtering an AC signal to produce a primary DC voltage. A voltage level signal indicating whether the primary DC voltage falls within a particular voltage range is generated. The voltage level signal is used to select a particular primary winding from either the first primary winding or the second primary winding. A PWM controller corresponding to the particular primary winding is activated and an output of the particular PWM controller performs zero voltage switching of a gate terminal of the applicable main switching transistor. A duty cycle of the main switching transistor is maintained within a range of approximately 50% to approximately 60% in accordance with the turns ratio and the primary DC voltage to achieve a desired output voltage.

公开(公告)号：US20170293347A1

公开(公告)日：2017-10-12

申请号：US15093137

申请日：2016-04-07

Applicant: Dell Products L.P.

Inventor： Merle J. Wood, III ,  Wei-Cheng Yu ,  Sean P. O'Neal ,  Thomas E. Voor ,  Tsung-Cheng Liao ,  Tun-Chieh Liang

IPC: G06F1/32 ,  G06F13/38 ,  G06F13/42

CPC classification number: G06F13/385 ,  G06F1/26 ,  G06F1/32 ,  G06F13/4282

Abstract: A system and method for performing an intelligent power dongle operation for information handling systems having a serial bus power connection such as a USB type-C power connection. In certain embodiments, the intelligent power dongle includes hardware and firmware to read a legacy adapter PSID information and convert the information to serial information such as USB Type-C baseboard management controller BMC compliant data. In certain embodiments the intelligent power dongle includes power management circuitry the allow selection and proper switching between a low voltage power mode (e.g., a 5V power mode) and a higher voltage power mode (e.g., a 19.5V power mode) depending on a device attached to the intelligent power dongle. In certain embodiments, the intelligent power dongle may be used to power low voltage devices (e.g., devices powered by 5V).

公开(公告)号：US10346333B2

公开(公告)日：2019-07-09

申请号：US15093137

申请日：2016-04-07

Applicant: Dell Products L.P.

Inventor： Merle J. Wood, III ,  Wei-Cheng Yu ,  Sean P. O'Neal ,  Thomas E. Voor ,  Tsung-Cheng Liao ,  Tun-Chieh Liang

IPC: G06F1/32 ,  G06F13/38 ,  G06F13/42 ,  G06F1/26

Abstract: A system and method for performing an intelligent power dongle operation for information handling systems having a serial bus power connection such as a USB type-C power connection. In certain embodiments, the intelligent power dongle includes hardware and firmware to read a legacy adapter PSID information and convert the information to serial information such as USB Type-C baseboard management controller BMC compliant data. In certain embodiments the intelligent power dongle includes power management circuitry the allow selection and proper switching between a low voltage power mode (e.g., a 5V power mode) and a higher voltage power mode (e.g., a 19.5V power mode) depending on a device attached to the intelligent power dongle. In certain embodiments, the intelligent power dongle may be used to power low voltage devices (e.g., devices powered by 5V).

公开(公告)号：US09979300B1

公开(公告)日：2018-05-22

申请号：US15417498

申请日：2017-01-27

Applicant: Dell Products L.P.

Inventor： Merle Wood ,  Wei-Cheng Yu ,  Tun-Chieh Liang ,  Tsung-Cheng Liao ,  Wen-Yung Chang

IPC: H02M3/335 ,  H02M1/00 ,  H02M7/757 ,  H02M5/42 ,  H02M7/68 ,  H02M3/24 ,  H02M7/44 ,  H02M1/44

CPC classification number: H02M3/33507 ,  H02M1/44 ,  H02M3/33569 ,  H02M3/337 ,  H02M2001/0058

Abstract: Systems and methods for enhancing peak power capability and hold-up time in a resonant converter having a LLC topology may include a couple choke transformer circuit that may control an inductance of the couple choke transformer circuit and improve power efficiency of the resonant converter. The resonant converter may also include a resonant tank circuit that may provide improved peak power delivery of the resonant converter. The resonant converter may further include a resonant tank control circuit to control the resonant tank circuit and may increase the peak gain of the resonant converter, increase a voltage range of the input voltage, and extend a hold-up time of the input voltage when an AC power failure occurs.

公开(公告)号：US09843265B2

公开(公告)日：2017-12-12

申请号：US14973456

申请日：2015-12-17

Applicant: Dell Products L.P.

Inventor： Wei Cheng Yu ,  Tsung-Cheng Liao ,  Wen-Yung Chang ,  Merle Jackson Wood, III ,  Tun-Chieh Liang

IPC: H02M3/335 ,  H02M1/00

CPC classification number: H02M3/33569 ,  H02M2001/0022

Abstract: A zero voltage switching method for a flyback converter featuring a transformer with first and second primary windings and corresponding turns ratios, N1 and N2, includes rectifying and filtering an AC signal to produce a primary DC voltage. A voltage level signal indicating whether the primary DC voltage falls within a particular voltage range is generated. The voltage level signal is used to select a particular primary winding from either the first primary winding or the second primary winding. A PWM controller corresponding to the particular primary winding is activated and an output of the particular PWM controller performs zero voltage switching of a gate terminal of the applicable main switching transistor. A duty cycle of the main switching transistor is maintained within a range of approximately 50% to approximately 60% in accordance with the turns ratio and the primary DC voltage to achieve a desired output voltage.