Texas Instruments TAS5727 ユーザーズマニュアル

Installation

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2.1.1

Connecting the TAS5727EVM to MC57xxPSIA

On the right side of the MC57xxPSIA is a terminal block and another on the left of the TAS5727EVM
(labeled J1). Carefully place the MC57xxPSIA block above the TAS5727EVM block and gently push down.

Figure 4. Connecting TAS5727EVM to MC57xxPSIA

2.1.2

PSU Interface

The TAS5727EVM is powered by two power supplies connected to the MC57xxPSIA controller board: a
5V power supply (VIN), and a 8V-to-26V (PVDD) power supply. The 3.3V level is generated from the 5V
supply by an on-board voltage regulator.

NOTE:

The power-supply cable length must be minimized. Increasing the length of the PSU cable

increases the distortion of the amplifier at high output levels and low frequencies.

The maximum output-stage supply voltage depends on the speaker load resistance. See the
recommended maximum supply voltage in the TAS5727EVM data sheet.

Table 1. Recommended Power Supplies

Description

Voltage Limitations (8-

Load)

Current Recommendations

System power supply

Output power stage supply

8–26V

(1)

The rated current corresponds to two channels, full scale.

2.1.3

Loudspeaker Connectors

CAUTION

All 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 BTL mode, connect the
speaker’s two terminals (A and B or C and D) across two outputs on the TAS5727EVM.

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.

TAS5727 25W Digital Input Amplifier—with EQ and 2-Band DRC

SLOU299 – December 2010

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