AN2862 Datasheet, PDF (1/7 Pages) STMicroelectronics – Demonstration board user guidelines for the TS2007FC

AN2862
Application note
Demonstration board user guidelines for the TS2007FC
3 W filter-free class D audio amplifier with 6-12 dB fixed gain select
Introduction
This application note concerns the TS2007FC demonstration board, designed to evaluate
the class D audio differential amplifier TS2007FC.
This document provides:
■ a brief description of the TS2007FC device.
■ a description of the demonstration board and all of its components.
■ the layout of the demonstration board.
About the TS2007FC
The TS2007FC is an audio power class D amplifier that can drive up to 1.4 W into an 8 Ω
load at 5 V. It achieves better efficiency compared to a typical class AB audio power
amplifier.
This device allows switching between two different gains: 6 or 12 dB via a logic signal on the
GS pin. Pop and click reduction circuitry provides low on/off switch noise while allowing the
device to start within 1 ms. A standby function (active low) reduces the current consumption
to 1 μA typical. The TS2007FC also integrates an output short-circuit protection mechanism
and thermal shutdown protection to avoid damage to the amplifier.
Key features of the TS2007FC
■ Operating range from V_CC = 2.4 to 5.5 V.
■ Standby mode active low.
■ Output power: 1.4 W at 5 V or 0.5 W at 3.0 V into 8 Ω with 1% THD+N maximum.
■ Output power: 2.3 W at 5 V or 0.75 W at 3.0 V into 4 Ω with 1% THD+N maximum.
■ Two fixed gain selects: 6 or 12 dB.
■ Low current consumption.
■ Efficiency: 88% typical.
■ Signal-to-noise ratio: 90 dB typical.
■ PSRR: 68 dB typical at 217 Hz with 6 dB gain.
■ PWM base frequency: 280 kHz
■ Low pop and click noise.
■ Thermal shutdown protection.
■ Output short-circuit protection.
■ Flip-chip lead-free 9-bump package.
Refer to the datasheet for complete information on the TS2007FC.
February 2009
Rev 1
1/7
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