17814902. LOW POWER PFC CONVERTER simplified abstract (Apple Inc.)

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LOW POWER PFC CONVERTER

Organization Name

Apple Inc.

Inventor(s)

Bogdan T. Bucheru of Lakeway TX (US)

Joao L. Andres of Austin TX (US)

Marco A. Davila, Jr. of Spicewood TX (US)

LOW POWER PFC CONVERTER - A simplified explanation of the abstract

This abstract first appeared for US patent application 17814902 titled 'LOW POWER PFC CONVERTER

Simplified Explanation

The abstract describes a power converter that includes a Power Factor Correction (PFC) stage and a flyback stage. The PFC stage receives a rectified input voltage and is connected to the center tap of the primary winding of the flyback stage. The flyback stage consists of a primary winding, a secondary winding, and a main switch. The output of the PFC stage is connected to the secondary winding of the flyback stage. The converter also includes control circuitry that regulates the output voltage by operating the main switch and an auxiliary switch in the PFC stage. The auxiliary switch is selectively enabled in response to a low line voltage condition and operates synchronously with the main switch.

  • The power converter includes a PFC stage and a flyback stage.
  • The PFC stage receives a rectified input voltage and is connected to the center tap of the primary winding of the flyback stage.
  • The flyback stage includes a primary winding, a secondary winding, and a main switch.
  • The output of the PFC stage is connected to the secondary winding of the flyback stage.
  • The converter includes control circuitry that regulates the output voltage.
  • The control circuitry operates the main switch and an auxiliary switch in the PFC stage.
  • The auxiliary switch is selectively enabled in response to a low line voltage condition.
  • The enabled auxiliary switch operates synchronously with the main switch.

Potential applications of this technology:

  • Power converters for various electronic devices and systems.
  • Power supplies for computers, televisions, and other consumer electronics.
  • Renewable energy systems such as solar inverters.

Problems solved by this technology:

  • Power factor correction to improve the efficiency of power converters.
  • Regulation of output voltage to ensure stable and reliable power supply.
  • Synchronization of switches to optimize the performance of the converter.

Benefits of this technology:

  • Improved power efficiency and reduced energy consumption.
  • Enhanced reliability and stability of power supply.
  • Compatibility with different input voltage conditions.
  • Cost-effective solution for power conversion.


Original Abstract Submitted

A power converter can include an input PFC stage that receives a rectified input voltage coupled to a flyback stage including a center-tapped primary winding magnetically coupled to a secondary winding and a main switch coupled in series with the primary winding. The output of the PFC stage can be coupled to the center tap of the primary winding, and an output of the power converter can be coupled to the secondary winding of the flyback stage. The converter can further include control circuitry coupled to the main switch and an auxiliary switch in the PFC stage that operates the main switch to regulate an output voltage of the power converter, selectively enables the auxiliary switch responsive to a low line voltage condition at the input of the power converter, and operates the enabled auxiliary switch synchronously with the main switch.

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