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Inductor for TAS2552 boosted Class-D amp

Posted: 15 Aug 2014 ?? ?Print Version ?Bookmark and Share

Keywords:boost converter? TAS2552? class-D? class-G? signal level?

The boost converter inside the TAS2552 creates 8.5 V from a 3.0-V to 5.5-V input voltage on the VBAT terminal. This boosted voltage supplies the class-D output stage enabling up to 4 W of power into an 8-Ohm load.

Setting bit D6 in register 2 enables the boost converter. Setting bit D5 in register 2 enables auto pass through mode, which configures the boost converter for class-G mode, automatically turning the boost on or off, depending on the signal level. The threshold and the deactivation delay for auto pass through mode is configurable in register 20.

View the PDF document for more information.

Originally published by Texas Instruments Inc. at as "Inductor Selection for the TAS2552 Boosted Class-D Amplifier".

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