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AN3412 Datasheet(PDF) 1 Page - STMicroelectronics |
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AN3412 Datasheet(HTML) 1 Page - STMicroelectronics |
1 / 15 page June 2011 Doc ID 018920 Rev 1 1/15 AN3412 10 W +10 W dual BTL class-D audio amplifier demonstration board based on the TDA7491P Introduction The STEVAL-CCA028V1 is a demonstration board designed for the TDA7491P 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 any heatsink. Jumpers on the board allow configuring the amplifier in order 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. The main features of the TDA7491P include: ■ 10 W +10 W continuous output power at THD =10%, RL = 6 Ω, VCC = 11 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 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-CCA028V1 www.st.com |
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