Texas Instruments Corporation

Virginia Tech Intellectual Properties, Inc.

Yipeng Su

Ashish Khandelwal

Robert Allan Neidorff

Joseph Maurice Khayat

Bharath Balaji Kannan

Fred C Lee

Qiang Li

Qiong M Li

Wenkai Wu

Siew Kuok Hoon

Kuang-Yao Cheng

Jing Ye

Wang Li

Dongbin Hou

Wenli Zhang

Quiong M Li

Aspects of the present disclosure provide for a method. In at least some examples, the method includes controlling gate terminals of one or more transistors of a charger to operate the charger in a buck-boost mode of operation to generate a system voltage based on a bus voltage by performing power conversion through switching, determining that the bus voltage is greater in value than a voltage of a battery coupled to the charger, and controlling the gate terminals of the one or more transistors of the charger to operate the charger in a pass-through mode of operation to generate the system voltage based on the bus voltage without performing power conversion.

Switching mode charger with pass through mode

A primary side wireless power transmitter inductively couplable to a secondary side wireless power receiver for supplying power to the wireless power receiver for receiving communications from the secondary side wireless power receiver through the inductive coupling comprises a primary side tank circuit receiving a signal on from the secondary side wireless power receiver. A phase delay or time delay circuit generates a fixed delay clock signal. A sample and hold circuit samples a tank circuit voltage utilizing the fixed phase or time delayed clock signal. A comparator is coupled to an output of the sample and hold circuit for extracting data or commands from the signal stream. A method of operating a primary side wireless transmitter inductively coupled to a secondary side wireless power receiver for supplying power to the wireless power receiver to power a load coupled to the receiver is also disclosed.

Circuit and architecture for a demodulator for a wireless power transfer system and method therefor

In an example, a circuit comprising a first inductor coupled between a first node and a second node, a first PMOS having a source terminal coupled to the second node and a drain terminal coupled to a third node, a second PMOS having a source terminal coupled to a ground voltage potential and a drain terminal coupled to the second node, a third PMOS having a source terminal coupled to a fourth node and a drain terminal coupled to the third node, a fourth PMOS having a source terminal coupled to the ground voltage potential and a drain terminal coupled to the fourth node, a NMOS having a source terminal coupled to the third node and a drain terminal coupled to a fifth node, a second inductor coupled between the fourth node and the fifth node, and a controller.

Multi-mode power management circuit

A multiphase DC-DC converter includes a first phase circuit including a higher inductance inductor and a second phase circuit including a lower inductance inductor. An output of the inductors are tied together providing a Vout. A phase manager and current sharing (PMCS) block receives a feedback signal from a feedback network coupled between Vout and the PMCS block that receives current feedback from phase circuits. The PMCS block generates driver control signals at a first time when a load is requesting a lower load current for controlling the phase circuits to operate with a first current sharing ratio to provide the lower load current, and at a second time when the load is requesting a higher load current controls the phase circuits to operate at a second current sharing ratio that is different from the first current sharing ratio having a higher average second phase circuit current.

Multiphase DC-DC converter with configurable current sharing and phase management

A low profile inductor structure suitable for use in a high power density power converter has one or more windings formed by vias through a thin, generally planar body of magnetic material forming the inductor core and conductive cladding on the body of magnetic material or material covering the magnetic material body. Variation of inductance with load current and other operational or environmental parameters is reduced to any desired degree by forming a slot that removes all or a portion of the magnetic material between the locations of the vias.

Low profile coupled inductor substrate with transient speed improvement

A low profile power converter structure is provide wherein volume is reduced and power density is increased to approach 1 KW/inby at least one of forming an inductor as a body of magnetic material embedded in a substrate formed by a plurality of printed circuit board (PCB) lamina and forming inductor windings of PCB cladding and vias which may be of any desired number of turns and may include inversely coupled windings and which provide a lateral flux path, forming the body of magnetic material from high aspect ratio flakes of magnetic material which are aligned with the inductor magnetic field in an insulating organic binder and hot-pressed and providing a four-layer architecture comprising two layers of PCB lamina including the embedded body of magnetic material, a shield layer and an additional layer of PCB lamina, including cladding for supporting and connecting a switching circuit, a capacitor and the inductor.

High frequency integrated point-of-load power converter with embedded inductor substrate

A primary side wireless power transmitter inductively couplable to a secondary side wireless power receiver for receiving communications from the secondary side wireless power receiver through the inductive coupling having a primary side tank circuit receiving a signal from the secondary side wireless power receiver. A phase delay or time delay circuit generates a fixed delay clock signal from a signal utilized to excite the primary side tank circuit. A sample and hold circuit samples a tank circuit voltage utilizing the fixed phase or time delayed clock signal. A comparator is coupled to an output of the sample and hold circuit for extracting data or commands from the signal stream. A method of operating a primary side wireless transmitter inductively coupled to a secondary side wireless power receiver for supplying power to the wireless power receiver to power a load coupled to the receiver is also disclosed.

Growing community of inventors

Blacksburg, VA, United States of America

Yipeng Su