Reducing power in a power converter when in a standby mode
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United States of America Patent
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Mar 6, 2018
Issued Date -
N/A
app pub date -
May 31, 2016
filing date -
Jun 1, 2015
priority date (Note) -
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Abstract
Power converters typically have unique circuitry for graceful start-up and to develop correct operating voltage biases. Typically this unique circuitry is incorporated into a primary-side “start-up” controller. This start-up controller can also be the primary means of control of the power converter once started. However, a secondary-side controller is typically needed for more exact output voltage regulation, duplicating circuitry already present in the primary-side start-up controller. During light-load or no load conditions, on and off switching of the gate driver is stopped when the secondary-side controller sends a standby code inhibit (disable) command to the start-up controller. When power needs to be sent to the secondary side of the transformer to charge a secondary side capacitor, the secondary-side controller sends an enable code command to the start-up controller where it is detect to allow the start-up controller to operate in a normal fashion with the secondary side controller.
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