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Installation
The maximum output-stage supply voltage depends on the speaker load resistance. Check the
recommended maximum supply voltage in the TAS5711 data sheet.
Table 1. Recommended Power Supplies
www.ti.com
Description
System power supply
Output power stage supply
Voltage Limitations
5V
8–26 V
Current Recommendations
1A
4 A (1)
2.1.3
(1)
The rated current corresponds to three channels, full scale.
Loudspeaker Connectors
CAUTION
All BTL speaker outputs are biased at Vcc/2 and must not be connected to
ground (e.g., through an oscilloscope ground).
Loudspeaker connections vary by device setup. When connecting a speaker in single-ended mode,
connect the positive terminal to one output on the TAS5711EVM (A, B, C, or D), and connect the negative
terminal to ground. When connecting a speaker in BTL mode, connect the speaker’s two terminals across
two outputs on the TAS5711EVM (A and B or C and D).
Speakers or loads can be connected to the outputs A-D with clip leads, or cables can be made
with female connectors (JST VHR-2N) that can mate to male connectors on the EVM board.
OUT A
OUT B
Figure 5. BTL Connection
OUT A
Figure 6. SE Connection
2.1.4
USB Interface
The TAS5711 registers are accessed through I 2 C? bus lines SDA and SCL. The USB circuit and USB
connector on the MC57xxPSIA board facilitates the connection between a host computer and the device.
The EVM USB circuit is powered by the 5-V USB line of the host PC and is independent of the power
supplies available on the board. The USB device that is used is a TAS1020B from Texas Instruments.
6
TAS5711EVM Evaluation Module
Copyright ? 2009, Texas Instruments Incorporated
SLOU280 – January 2009
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