DEMOTS4990Q: Mono, 1.2W @ 8Ω, 2.2 ~ 5.5Vin


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.


Manufacturer STMicroelectronics
Category Audio Amplifiers
Eval Board Part Number 497-6383-ND
Eval Board Supplier STMicroelectronics
Eval Board Board not Stocked
Amplifier Type Class AB
Number of Outputs Mono
Output Power (RMS) @ Load 1.2 W @ 8 Ω
Voltage In 2.2 ~ 5.5 V
THD+N (1kHz) @ Conditions < 0.05% @ 0.1 ~ 1.2 W (8 Ω, 5V)
< 1% @ 1.2 W (8 Ω, 5V)
Features Short Circuit Protection
Thermal Protection
Turn On/Off Depop
Efficiency @ Conditions - Not Given
Standby Current [Typical] 10 nA
Quiescent Current [Typical] 3.7 mA
Component Count + Extras 8 + 6
Application / Target Market Audio: MP3 Players
Cell Phones
Portable Devices
RF: BlueTooth
Design Author STMicroelectronics
Main I.C. Base Part TS4990
Quiescent Current [Maximum] 6 mA
Standby Current [Maximum] 1 µA
Date Created By Author
Date Added To Library 2011-03