TAS2120 datasheet(44/63 Pages) TI

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7 Application and Implementation

Note

Information in the following applications sections is not part of the TI component specification, and

TI does not warrant its accuracy or completeness. TI’s customers are responsible for determining

suitability of components for their purposes. Customers should validate and test their design

implementation to confirm system functionality.

7.1 Application Information

TAS2120 is a mono channel digital-in Class-D amplifier with integrated Boost, battery voltage and temperature

monitoring capabilities. I2S audio data is supplied by host processor via SDIN data port along with the bit clock

and frame sync signals. I2C bus is used for configuration and control.

The device needs external power supply voltage rails of VBAT: 2.5V to 5.5V, VDD : 1.65V to 1.95V and IOVDD:

1.8V or 3.3V for operation.

PurePathTM Console 3 (PPC3) software is the recommended tool to configure the device, and it enables

optimization of device performance parameters depending on different application scenarios.

7.2 Typical Application

Diagrams below shows the typical application connections for 1S and 2S Li-Ion battery and for the external

PVDD or 3S Battery connection. VBAT_SNS pin connection is optional and if not used, this pin should be

grounded. SEL1 is used for HW Mode selection or I2C Mode selection of the Device.

System can use same 1.8V supply source to power the IOVDD and VDD if required. The decoupling caps C2

and C3 should still be placed close to the device pins.

VBAT, VDD, PVDD power rails are critical for device performance and wide trace should be used from the

source PMIC to these pins to minimize parasitic inductance. Supply ripple should be kept at minimum for these

rails and should be connected to common supply planes.

TAS2120

SLASFC6 – AUGUST 2024

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TAS2120 Datasheet(PDF) 44 Page - Texas Instruments