Primary-side start-up method and circuit arrangement for series-parallel resonant power converter
A power converter and resonant circuit technology, which is applied in the direction of output power conversion device, DC power input conversion to DC power output, high-efficiency power electronic conversion, etc., can solve the problems of increasing the cost of power converters and transportation scheduling
Active Publication Date: 2020-11-06
MICROCHIP TECH INC
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Problems solved by technology
This unique circuitry may require custom integrated circuits and / or proprietary designs, which can increase the cost and shipping schedule of such power converters
Method used
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[0022] According to various embodiments of the present invention, a series-parallel resonant power converter may include a primary-side start-up controller and a secondary-side controller, wherein when power (voltage) is first applied to the When on the primary side, the primary side enables the controller to send power to the secondary side controller. The primary side start-up controller may use an open loop start-up technique to start up the series-parallel resonant power converter, wherein when the secondary side closed-loop controller becomes energized and starts, the secondary side closed-loop control to take over the linear closed-loop control of the series-parallel resonant power converter.
[0023] This provides a low-cost integrated circuit (IC) solution for starting DC-to-DC and AC-to-DC series-parallel resonant power converters using conventional means on the primary side that does not duplicate the resources of the secondary-side controller and minimize discrete ...
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A series-parallel resonant power converter includes a primary side start-up controller and a secondary side controller, wherein the primary side start-up controller sends power to the series-parallel resonant power converter when power (voltage) is first applied to the series-parallel resonant power converter. Described secondary side controller. The start-up controller starts up the series-parallel resonant power converter using an open-loop start-up technique, wherein when the secondary-side closed-loop controller becomes energized and starts, the secondary-side closed-loop controller takes over Control of the series-parallel resonant power converter. During light load or no load conditions, the secondary side controller sends an off-resonance higher frequency or standby code disable (deactivate) command to the startup controller. When power needs to be sent to the secondary side of the transformer to charge a secondary side capacitor, the secondary side controller may send an enable coded command to the startup controller, which is detected to allow the The startup controller operates in a normal manner using the secondary side controller.
Description
[0001] Related patent applications [0002] This application claims priority to commonly-owned U.S. Provisional Patent Application No. 62 / 169,382, filed June 1, 2015; and related to U.S. Patent Application No. 14 / 945,729, filed November 19, 2015; and U.S. Provisional Patent Application No. 62 / 169,415, filed June 1, 2015; in its entirety by Thomas Quigley, all of which are hereby incorporated by reference for all purposes middle. technical field [0003] The present invention relates to power converters, and in particular, to start-up controller methods and apparatus for DC-to-DC and AC-to-DC series-parallel resonant power converters. Background technique [0004] A series-parallel resonant power converter is a converter in which the load can be connected in series with the resonant "tank" circuit or in parallel with one of the tank circuit components. A series-parallel power converter comprising two inductors, one of which is the magnetizing inductance of the transformer,...
Claims
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IPC IPC(8): H02M1/36H02M3/335H02M3/337H02M1/32
CPCH02M1/32H02M1/36H02M3/33507H02M3/33592H02M1/0035H02M1/0006H02M1/0009H02M1/0058H02M3/01H02M3/33571Y02B70/10H02M3/33569H02M3/337
Inventor T·奎格利
Owner MICROCHIP TECH INC