AN4171 datasheet(1/14 Pages) STMICROELECTRONICS

Part #	AN4171

Description	The STEVAL-CCA043V1 is a demonstration board designed for the evaluation

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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November 2012

Doc ID 023710 Rev 1

1/14

AN4171

Application note

25 W mono BTL class-D audio amplifier demonstration board based

on the TDA7491MV

Introduction

The STEVAL-CCA043V1 is a demonstration board designed for the evaluation of the

TDA7491MV mono BTL class-D audio amplifier. This application note provides the board

specifications and a quick-start list for standalone operation. Also included are the

schematic, printed circuit board layout and bill of material.

Due to its high efficiency, the device, assembled in the PSSO36 (slug-down) package, is

capable of dissipating heat without a heatsink. Jumpers on the board allow the configuration

of the amplifier in order to verify the input signal as single-ended or differential and choose

the fixed gain settings. Microswitches are also provided to enable the standby and mute

functions.

The main features of the TDA7491MV include:

■ 25 W continuous output power at THD = 10%, RL = 6 Ω, VCC = 16 V

■ 20 W continuous output power at THD = 10%, RL = 8 Ω, VCC = 18 V

■ Wide-range, single-supply operation (5 V - 18 V)

■ High efficiency (

η = 90%)

■ Four selectable, fixed gain settings (20 dB, 26 dB, 30 dB and 32 dB)

■ Differential inputs to minimize common-mode noise

■ Filterless operation up to 15 W, RL = 8 Ω, VCC =18 V

■ Standby and mute features

■ Short-circuit and thermal overload protections

■ Externally synchronizable

Figure 1.

STEVAL-CCA043V1

www.st.com

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