ST AN2049 APPLICATION NOTE

AN2049

Application note

Demonstration board user guidelines

for the TS4984 low voltage audio power stereo amplifier

Introduction

This application note applies to the STEVAL-CC003V1 demonstration board, designed to
evaluate the low-voltage audio power stereo amplifier TS4984.

The document provides:

■ a description of the demonstration board,

■ the layout of the top and bottom layers.

Key features of the TS4984

■ Low voltage audio power stereo amplifier with active low standby mode

■ Operating range from V

■ 1 W output power at V

■ Ultra-low power consumption in standby mode (10 nA)

■ 62 dB PSRR at 217 Hz with grounded inputs (Av = 2 V/V)

■ Near-zero pop and click

■ Ultra-low distortion (0.1%)

■ Module gain set at 2 V/V

■ Thermal and short-circuit protection

= 2.2 to 5.5 V

CC

= 5 V, THD =1%, F = 1 kHz, with 8 Ω load

CC

August 2009 Doc ID 10901 Rev 4 1/9

www.st.com

Description of the demonstration board AN2049

1 Description of the demonstration board

The STEVAL-CC003V1 is a demonstration board designed for the TS4984 low-power audio
stereo amplifier.

The micropackage QFN16 (quad, flat, non-leaded,16 pins) combines space-saving with
good thermal dissipation.

The BTL gain is set at 2 V/V for both channels and can be adapted if necessary by
modifying the R1 (R8) or R2 (R6) values for the left (right) channels.

The R3 (R6) and C3 (C5) component locations on the board are empty so as to allow you to
change both input configurations from single-ended to differential. To set-up the board for
use in differential mode, you must modify R4 (R7).

The C1 (C6) component location is also empty so that you can add a low-pass filter if
necessary.

2/9 Doc ID 10901 Rev 4

AN2049 Demonstration board connectors

2 Demonstration board connectors

Caution: When you apply the power supply through Cn1, do not invert the polarity since this can

destroy the U1 amplifier.

Connector Description

Cn1 Power connector (V

Cn2 and Cn3 Input signal connector for left channel (GND and active input signal).

Cn5 and Cn6 Input signal connector for right channel (GND and active input signal).

Cn4 Output signal connector for left channel (VO-L and VO+L).

Cn7 Output signal connector for right channel (VO-R and VO+R).

Standby control connector (VCC, Standby, GND). A short-circuit between VCC

Cn8

and standby puts U1 in operation mode. A short-circuit between GND and
Standby puts U1 in standby mode.

and GND). Power supply voltage from 2.2 to 5.5 V.

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Doc ID 10901 Rev 4 3/9