The 6.1-W boost feature of TAS2563 is based on the internal Class-H gain controller. In the Channel Gain panel of the Device Control page, user can configure the specification of the internal boost according to the system requirements. Depeding on the application, there are four boost modes available. Class H boost, or multilevel boost, is used for the highest power efficiency but demands greater input current from the battery for fast switching. Class G boost, or two levels boost, is used for lower input current demand from the battery, but is less efficient than the Class H boost. Always on boost is used to boost all signals, and always off boost is used for the external boost option. In order to properly configure the internal boost feature, it is important to verify that the Boost Inductor Range and Boost Capacitance at 0 V match the component values in the layout deisgn.

In the Channel Gain tile, users are also allowed to limit the max power output by defining the Max Boost Voltage and Peak Current Limit. This provides a safety consideration for each system and application. For more details about Channel Gain, please refer to Benefits of Class-G and Class-H Boost in Audio Amplifiers.

Figure 1-11 Channel Gain.