Texas Instruments BQ51050BEVM-764 Evaluation Module BQ51050BEVM-764 BQ51050BEVM-764 Datenbogen
Produktcode
BQ51050BEVM-764
SLUSB42D – JULY 2012 – REVISED JANUARY 2014
Details of a Qi Wireless Power System and bq5105xB Power Transfer Flow Diagrams
The bq5105xB integrates a fully compliant WPC v1.1 communication algorithm in order to streamline receiver
designs (no extra software development required). Other unique algorithms such has Dynamic Rectifier Control
are also integrated to provide best-in-class system performance. This section provides a high level overview of
these features by illustrating the wireless power transfer flow diagram from startup to active operation.
designs (no extra software development required). Other unique algorithms such has Dynamic Rectifier Control
are also integrated to provide best-in-class system performance. This section provides a high level overview of
these features by illustrating the wireless power transfer flow diagram from startup to active operation.
During startup operation, the wireless power receiver must comply with proper handshaking to be granted a
power contract from the Tx. The Tx will initiate the hand shake by providing an extended digital ping. If an Rx is
present on the Tx surface, the Rx will then provide the signal strength, configuration and identification packets to
the Tx (see volume 1 of the WPC specification for details on each packet). These are the first three packets sent
to the Tx. The only exception is if there is a true shutdown condition on the EN1/EN2, AD, or TS-CTRL pins
where the Rx will shut down the Tx immediately. Once the Tx has successfully received the signal strength,
configuration and identification packets, the Rx will be granted a power contract and is then allowed to control the
operating point of the power transfer. With the use of the bq5105xB Dynamic Rectifier Control algorithm, the Rx
will inform the Tx to adjust the rectifier voltage above 7 V prior to enabling the output supply. This method
enhances the transient performance during system startup. See
power contract from the Tx. The Tx will initiate the hand shake by providing an extended digital ping. If an Rx is
present on the Tx surface, the Rx will then provide the signal strength, configuration and identification packets to
the Tx (see volume 1 of the WPC specification for details on each packet). These are the first three packets sent
to the Tx. The only exception is if there is a true shutdown condition on the EN1/EN2, AD, or TS-CTRL pins
where the Rx will shut down the Tx immediately. Once the Tx has successfully received the signal strength,
configuration and identification packets, the Rx will be granted a power contract and is then allowed to control the
operating point of the power transfer. With the use of the bq5105xB Dynamic Rectifier Control algorithm, the Rx
will inform the Tx to adjust the rectifier voltage above 7 V prior to enabling the output supply. This method
enhances the transient performance during system startup. See
for the startup flow diagram details
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