AN2725 Datasheet, PDF (1/8 Pages) STMicroelectronics – a brief description of the TS2012 device

AN2725
Application note
Demonstration board user guidelines for the
TS2012 filter-free stereo 2 x 2.8 W class D audio power amplifier
Introduction
This application note applies to the STEVAL-CCA007V1 demonstration board, designed to
evaluate the stereo class D audio differential amplifier TS2012.
The document provides:
■ a brief description of the TS2012 device,
■ a description of the demonstration board and all of its components,
■ the layout of the demonstration board.
About the TS2012
The TS2012 is a fully-differential class D stereo power amplifier that can drive up to 1.35 W
into an 8 Ω load at 5 V per channel. It achieves outstanding efficiency compared to typical
class AB audio amplifiers.
The device has four different gain settings that use two digital pins: G0 and G1. Pop and
click reduction circuitry provides low on/off switch noise while allowing the device to start
within 1 ms. Two standby pins (active low) allow each channel to be switched off
independently.
The TS2012 is available in a 4 x 4 mm QFN20 package.
Key features of the TS2012
■ Operating range from V_CC = 2.5 to 5.5 V
■ Standby mode active low
■ Output power per channel: 1.35 W at 5 V or 0.68 W at 3.6 V into 8 Ω with 1% THD+N max
■ Output power per channel: 2.2 W at 5 V into 4 Ω with 1% THD+N max
■ Four gain select settings: 6, 12, 18, 24 dB
■ Low current consumption
■ PSRR: 70 dB typ at 217 Hz with 6 dB gain
■ Fast start-up phase: 1 ms
■ Thermal shutdown protection
■ QFN20 4 x 4 mm lead-free package
Refer to the datasheet for complete information on the TS2012.
August 2009
Doc ID 14535 Rev 1
1/8
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