Texas Instruments TPA 311 manual Quick Start List for Platform, Platform preparations

Quick Start List for Platform

2.2 Quick Start List for Platform

Use the following steps when using the TPA311 EVM with the TI Plug-N-Play Audio Amplifier Evaluation Platform (see the platform user's guide, SLOU011, for additional details). Numbered callouts for selected steps are shown in Figure 2±1 and details appear in Chapter 3.

-Platform preparations

1)Ensure that all external power sources are set to OFF and that the platform power switch S1 is set to OFF

2)Install a TPA311 module in platform sockets U3 and U4 for stereo operation (or a module in either U3 or U4 for single channel operation), taking care to align the module pins correctly

3)Use switch S2 to select or bypass the signal conditioning EVM (U1)

4)Set control signal Polarity jumper JP8 to Hi

5)Set jumper JP6 to select the Mode control input (causes the TPA311 to switch to the single-ended output mode if a plug is inserted into platform headphone jack J10)

6)If the headphone Jack (J10) output will be used, set Hp source switch S3 to U2±U4.

Table 2±2. Platform Jumper and Switch Settings for the TPA311

EVM	JP6	JP7	JP8	S2	S3
TPA311	Mode	X	Hi	Note 2	X

Notes: 1) X = Don't care

2)Set S2 to ON when signal conditioning board is installed in U1; set S2 to OFF when no signal conditioning board is installed.

-Power supply

7)Select and connect the power supply:

a)Connect an external regulated power supply set to a voltage between 2.0 V and 5.5 V to platform VDD power input connector J6 taking care

to observe marked polarity, or

b)Install a voltage regulator EVM (SLVP097 or equiv.) in platform socket U6. Install a 9-V battery in B1 or connect a 7 V ± 12 V power source

to a platform VCC power input J1 or J2 and jumper the appropriate power input (see platform user's guide)

-Inputs and outputs

8)Ensure that signal source level adjustments and EVM gain, R4, are set to minimum

9)Connect the audio source to left and right RCA phono jacks J3 and J5 or stereo miniature phone jack J4

10)Connect 8-Ω± 32-Ωspeakers to left and right RCA jacks J7 and J9 or to stripped wire connectors J8

-Power-up

11)Verify correct voltage and input polarity and set the external power supply

to ON. If VCC and an on-board regulator EVM are used to provide VDD, set platform power switch S1 to ON

Platform LED2 should light indicating the presence of VDD, and the evaluation modules installed on the platform should begin operation.

12) Adjust the signal source level and EVM gain level (R4) as needed

Quick Start 2-3