VERY HIGH FREQUENCY SWITCHING RESONANT SYNCHRONOUS RECTIFICATION

• US 20120206943A1
• Filed: 04/27/2012
• Published: 08/16/2012
• Est. Priority Date: 08/18/2010
• Status: Active Grant

• Current Assignee: FINsix Corporation
• Original Assignee: OnChip Power
• Inventors: Sagneri, Anthony D., Hwang, Jae-Won George, Burkhart, Justin Michael, Chen, Fred
• Granted Patent: US 8,848,399 B2
• Time in Patent Office: Days
• US Class Current: 363/21.02
• CPC Class Codes: H02M 1/0058 by employing soft switching techniques, i.e. commutation of transistors when applied voltage is zero or when current flow is zero using an auxiliary actively switched resonant commutation circuit connected to an intermediate DC voltage or between two push-pull branches of an inverter bridge H02M7/4811; in resonant inverters H02M7/4815; in inverters operating from a resonant DC source H02M7/4826
• CPC Class Codes: H02M 1/007 Plural converter units in cascade push-pull DC/DC converters with pre-regulator H02M3/3374; DC-AC converters following a DC-DC stage including a high frequency transformer H02M7/4807; DC-AC converters following a DC-DC conversion stage generating periodically varying voltages H02M7/4826
• CPC Class Codes: H02M 1/0074 Plural converter units whose inputs are connected in series
• CPC Class Codes: H02M 1/0077 Plural converter units whose outputs are connected in series
• CPC Class Codes: H02M 1/42 Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
• CPC Class Codes: H02M 1/4241 using a resonant converter
• CPC Class Codes: H02M 3/07 using capacitors charged and discharged alternately by semiconductor devices with control electrode , e.g. charge pumps
• CPC Class Codes: H02M 3/158 including plural semiconductor devices as final control devices for a single load
• CPC Class Codes: H02M 3/1584 with a plurality of power processing stages connected in parallel
• CPC Class Codes: H02M 3/285 Single converters with a plurality of output stages connected in parallel parallel operation of a plurality of converters in dc distribution networks H02J1/10
• CPC Class Codes: H02M 3/335 using semiconductor devices only
• CPC Class Codes: H02M 3/33592 having a synchronous rectifier circuit or a synchronous freewheeling circuit at the secondary side of an isolation transformer
• CPC Class Codes: Y02B 70/10 Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes

Abstract

A VHF switching power converter comprising one or more VHF switching frequency resonant synchronous rectifiers receives an output from an inverter and delivers a DC output to a load. The power converter includes a controller for controlling at least one of the one or more VHF switching frequency resonant synchronous rectifiers based on feedback derived from a waveform of at least one of the rectifiers. The controller controls a phase angle of at least one of the rectifiers with a delay locked loop. The power converter delivers a regulated DC output via adjustment of a phase shift between at least one of the one or more rectifiers and the inverter.

Claims

1. A VHF switching power converter comprising one or more VHF switching frequency resonant synchronous rectifiers for receiving an output from an inverter and for delivering a DC output to a load.

2. The power converter of claim 1, further including a controller for controlling at least one of the one or more VHF switching frequency resonant synchronous rectifiers.

3. The power converter of claim 2, wherein the controller controls the at least one of the one or more VHF switching frequency resonant synchronous rectifiers based on feedback derived from a waveform of at least one of the one or more VHF switching frequency resonant synchronous rectifiers.

4. The power converter of claim 2, wherein the controller controls a phase angle of at least one of the one or more VHF switching frequency resonant synchronous rectifiers.

5. The power converter of claim 4, wherein the controller includes a delay locked loop to control the phase angle.

6. The power converter of claim 1, wherein delivering a DC output to a load includes regulating the DC output via adjustment of a phase shift between at least one of the one or more rectifiers and the inverter.