AN3385 Datasheet, PDF (1/15 Pages) STMicroelectronics – This application note describes the STEVAL-CCA027V1 demonstration

AN3385
Application note
50 W + 50 W dual BTL class-D audio amplifier demonstration board
based on the TDA7492
Introduction
This application note describes the STEVAL-CCA027V1 demonstration board designed for
the evaluation of the TDA7492 high-power dual BTL class-D audio amplifier and provides
the board specifications and a quick-start list for standalone operation.
Due to the device’s high efficiency, the TDA7492, housed in the PSSO-36 package, is
capable of dissipating heat with the use of a relatively small 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 TDA7492 include:
■ 50 W + 50 W continuous output power at THD = 10%, R_L= 6 Ω, V_CC = 25 V
■ 40 W + 40 W continuous output power at THD = 10%, R_L = 8 Ω, V_CC = 25 V
■ Wide-range, single-supply operation ( 8 V - 26 V)
■ High efficiency (η = 90 %)
■ Four selectable, fixed gain settings (21.6 dB, 27.6 dB, 31.1 dB and 33.6 dB)
■ Differential inputs to minimize common-mode noise
■ Standby and mute features
■ Short-circuit and thermal overload protections
■ Externally synchronizable
Figure 1. STEVAL-CCA027V1 demonstration board
October 2012
Doc ID 018702 Rev 1
1/15
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