AN1766 Datasheet, PDF (1/5 Pages) STMicroelectronics – TS4990 low voltage audio power amplifier

AN1766
Application note
TS4990 low voltage audio power amplifier
Evaluation board user guidelines
TS4990 features
■ TS4990 low voltage audio power amplifier with active low standby mode
■ Operating from V_CC=2.2V to 5.5V
■ 1.2W output power @ V_CC=5V, THD=1%, F=1kHz, with 8Ω load
■ Ultra low power consumption in standby mode (10nA)
■ 62dB PSRR @ 217Hz in grounded mode (Av=2V/V)
■ Near zero pop & click
■ Ultra low distortion (0.1%)
■ Module gain set at 2V/V
■ Thermal and short circuit protection
Description
The DEMO TS4990 is an evaluation board designed for the TS4990 low power audio
amplifier. The micropackage DFN8 (dual flat non leaded 8 pins) allows space saving and
good thermal dissipation.
The BTL gain is set at 2V/V and can be adapted if necessary with a modification of R1 or R2
values.
On the board, R3 and C3 component locations are empty to allow you to modify the input
configuration from single ended to differential. For differential mode, R4 must be modified.
The C1 component location is also empty so that you can add a low pass filter if required.
More information about component calculations is available in the TS4990 datasheet.
November 2006
Rev 3
1/5
www.st.com