AN4170 Datasheet, PDF (1/15 Pages) STMicroelectronics – The STEVAL-CCA042V1 is a demonstration board designed for the evaluation

AN4170
Application note
20 W + 20 W dual BTL class-D audio amplifier demonstration board
based on the TDA7491HV
Introduction
The STEVAL-CCA042V1 is a demonstration board designed for the evaluation of the
TDA7491HV dual BTL class-D audio amplifier. This application note provides the board
specifications and a quick-start list for standalone operation. Also included are the
schematic, printed circuit board layout and bill of material.
Due to its high efficiency, the device, assembled in the PSSO36 (slug-down) package, is
capable of dissipating heat without a heatsink. Jumpers on the board allow the configuration
of the amplifier in order to verify the input signal as single-ended or differential and choose
the fixed gain settings. Microswitches are also provided to enable the standby and mute
functions.
The main features of the TDA7491HV include:
■ 20 W + 20 W continuous output power at THD =10%, R_L = 8 Ω, V_CC = 18 V
■ 9.5 W + 9.5 W continuous output power at THD = 10%, R_L = 8 Ω, V_CC =12 V
■ Wide-range, single-supply operation (5 V - 18 V)
■ High efficiency (η = 90%)
■ Four selectable, fixed gain settings (20 dB, 26 dB, 30 dB and 32 dB)
■ Differential inputs to minimize common-mode noise
■ Filterless operation
■ Standby and mute features
■ Short-circuit and thermal overload protections
■ Externally synchronizable
Figure 1. STEVAL-CCA042V1
November 2012
Doc ID 023709 Rev 1
1/15
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