AN3956 datasheet(1/14 Pages) STMICROELECTRONICS

Part #	AN3956

Description	The STEVAL-CCA029V1 is a demonstration board designed

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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1 / 14 page

September 2012

Doc ID 022034 Rev 1

1/14

AN3956

Application note

5 W + 5 W dual BTL class-D audio amplifier demonstration board

based on the TDA7491LP

Introduction

The STEVAL-CCA029V1 is a demonstration board designed for the TDA7491LP dual 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 any heatsink. Jumpers on the board allow the

configuration of the amplifier in order to verify all the features as single-ended or differential

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

functions.

The main features of the TDA7491LP include:

■ 5 W +5 W continuous output power at THD =10%, RL = 8 Ω, VCC = 9 V

■ 5 W +5 W continuous output power at THD = 10%, RL = 4 Ω, VCC =6.5V

■ Wide-range, single-supply operation (5 V - 14 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

■ Standby and mute features

■ Short-circuit and thermal overload protections

■ Externally synchronizable

Figure 1.

STEVAL-CCA029V1

www.st.com

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