AN2933 Datasheet, PDF (1/10 Pages) STMicroelectronics – Demo board user guidelines for the TS4999 filter-free stereo

AN2933
Application note
Demo board user guidelines for the TS4999 filter-free stereo
2 x 2.8 W class D audio power amplifier with selectable 3D effect
Introduction
This application note concerns the TS4999 demonstration board, designed to evaluate the
stereo class D audio differential amplifier TS4999.
This document provides:
■ a brief description of the TS4999 device.
■ a description of the demonstration board and all of its components.
■ the layout of the demonstration board.
About the TS4999
The TS4999 is a fully-differential class D stereo power amplifier. It can drive up to 1.35 W
into an 8 Ω load at 5 V per channel. The device has four different gain settings utilizing two
discrete pins, G0 and G1.
Pop and click reduction circuitry provides low on/off switch noise while allowing the device to
start within 8 ms. 3D enhancement effects are selected through one digital input pin that
allows more amazing stereo audio sound.
Two standby pins (active low) allow each channel to be switched off separately.
The TS4999 is available in an 18-bump flip-chip package.
Key features of the TS4999
■ Operating range from V_CC = 2.4 V to 5.5 V.
■ Dedicated standby mode active low for each channel.
■ Output power per channel: 2.8 W at 5 V into 4 Ω with 10% THD+N or 0.7 W at 3.6 V into
8 Ω with 1% THD+N max.
■ Selectable 3D sound effect.
■ Four gain setting steps: 3.5, 6, 9.5 and 12 dB.
■ Low current consumption.
■ PSRR: 63 dB typical at 217 Hz.
■ Fast start-up phase: 7.8 ms.
■ Output short-circuit and thermal shutdown protection.
■ Flip-chip 18-bump lead-free package.
Refer to the datasheet for complete information on the TS4999.
March 2009
Rev 1
1/10
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