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20 W + 20 W dual BTL Class D audio amplifier demonstration board based on TDA7491HV

STEVAL-CCA042V1

Overview

The STEVAL-CCA042V1 demonstration board is designed for the TDA7491HV high-power dual BTL class-D audio amplifier.

Thanks 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 configuration of the amplifier to verify all the features as single-ended or differential inputs, fixed gain settings.
Microswitches are also provided to enable the standby and mute functions

Main features

20 W +20 W continuous output power at THD = 10%, RL = 8 Ω, VCC = 18 V
9.5 W + 9.5 W continuous output power at THD = 10%, RL = 8 Ω, VCC = 12 V
Wide-range single-supply operation (5 - 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
RoHS compliant

Design Files

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Update:2025-05-09 05:36:12

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