Datasheet

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OUT A

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Installation

2.1.2 PSU Interface

The TAS5717/19EVM is powered by two power supplies connected to the MC57xxPSIA controller board:

a 5V power supply (VIN), and a 4.5V-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 TAS5717/19EVM data sheet.

Table 1. Recommended Power Supplies

Description Voltage Limitations (8-Ω Load) Current Recommendations

System power supply 5V 1A

Output power stage supply 4.5–26V 4A

(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 TAS5717/19EVM.

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.

Figure 6. BTL Connection

2.1.4 USB Interface

The TAS5717/19 registers are accessed through I

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 5V 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.

SLOU303–November 2010 TAS5717/19 10W/15W Digital Audio Power Amplifier with Integrated

Capacitor-Free HP Amplifier

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