Datasheet

Operation

www.ti.com

4. Ensure all external power sources are set to OFF.

5. Connect an external regulated power supply adjusted from 2.5 V to 5.5 V to the module VDD (J5) and

GND (J6) banana jacks, taking care to observe the marked polarity.

6. Install shunt in JP1 if DVDD is powered by the 1.8 V regulated supply from the EVM itself. If DVDD is

header 1 of JP1.

7. HPVDD is set to VDD by default. If HPVDD is powered by another supply (between 2.5 V and 5.5 V),

remove R17 and connect the supply at TP24.

8. Connect audio source as mentioned in step two.

9. Connect headphones to J4.

10. Connect speakers (8 Ω to 32 Ω ) to the output (J11, J12 for LOUT and J13, J14 for ROUT). The

speakers can also be connected to J2 and J3 if header connection is available in the speakers.

11. Plug in the USB.

12. Turn on power sources.

13. The TPA2054D4 can also be powered by USB cable if the audio amplifier output power is less than

100mW. Shunt JP9 and remove the power supply at J5 and J6 for USB power option.

14. This table provides the test points information on the EVM:

Table 2. Test Points Information

Test Point Description

TP1, TP2, TP3, TP4 OUTR+, OUTR-, OUTL-, OUTL+

Filtered OUTR+, OUTR-, OUTL-,

TP5, TP6, TP7, TP8

OUTL+

TP9 HPVSS

TP10 INR_1

TP11 INL_1

TP12 INL_2

TP13 INR_2

T14 HPRIGHT

T15 HPLEFT

TP18 DVDD

TP20 SCL

TP23 SDA

TP24 HPVDD

TP27 VREF

TP19, TP21, TP22, TP25, TP26 GND

4 TPA2054D4EVM SLOU249 – April 2009

Submit Documentation Feedback