for further information contact your local stmicroelectronics sales office. june 2012 doc id 022892 rev 1 1/4 4 STEVAL-CCA029V1 5 w + 5 w class-d audio amplifier demonstration board based on the tda7491lp data brief features 5 w + 5 w continuous output power at thd = 10%, r l = 8 , v cc = 9 v 5 w + 5 w continuous output power at thd = 10%, r l = 4 , v cc = 6.5 v power supply voltage range: 5 v to 14 v number of channels: 2 btl (bridge tied load) stereo load impedance: 4 to 8 gain settings: 20 db, 26 db, 30 db, 32 db undervoltage protection (uvp): 4 v external synchronization rohs compliant description the STEVAL-CCA029V1 demonstration board is designed for the evaluation of the tda7491lp dual btl class-d audio amplifier. 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 the configuration of 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. www.st.com
schematic STEVAL-CCA029V1 2/4 doc id 022892 rev 1 1 schematic figure 1. circuit schematic 7 ' $ / 3 9 2 3 , 1 , 2 1 * $ , 1 * $ , 1 1 2 0 , 1 $ / * $ , 1 9 9 9 9 9 9 9 9 g % g % g % g % & x ) 9 & q ) 5 . & q ) & q ) & q ) & q ) & q ) & q ) & q ) & s ) 5 5 & s ) & s ) & s ) 5 5 & s ) & s ) & q ) & q ) & q ) & q ) , 1 3 % 9 6 6 2 8 7 1 % 3 * 1 ' % 3 9 & & % 2 8 7 3 % 2 8 7 1 $ 3 9 & & $ 3 * 1 ' $ 2 8 7 3 $ , 1 1 % 2 8 7 1 % 3 * 1 ' % 0 8 7 ( 3 9 & & % 2 8 7 3 % 6 9 5 2 8 7 1 $ 6 8 % b * 1 ' , 1 3 $ , 1 1 $ 6 * 1 ' 9 ' ' 6 ' , $ * 9 ' ' 3 : 3 * 1 ' 6 7 % < 5 2 6 & * $ , 1 6 9 & & * $ , 1 6 < 1 & / . 2 8 7 3 $ 3 * 1 ' $ 9 5 ( ) 3 9 & & $ , & 7 ' $ 3 5 n 5 5 & q ) 5 n 5 & q ) & & & & / % / 0 3 * 6 1 / % / 0 3 * 6 1 / % / 0 3 * 6 1 / % / 0 3 * 6 1 & q ) & q ) & q ) - - - - - - - 9 - 6 * 1 ' / % / 0 . * 6 1 / % / 0 . * 6 1 / % / 0 . * 6 1 / % / 0 . * 6 1 / % / 0 . * 6 1 / % / 0 . * 6 1 / % / 0 . * 6 1 / % / 0 . * 6 1 / % / 0 . * 6 1 & x ) [ & & & - - 0 3 - - 0 3 6 * 1 ' 6 * 1 ' 6 * 1 ' ' 1 * 6 ' 1 * 6 ' 1 * 6 ' 1 * 6 ' 1 * 6 ' 1 * 6 ' 1 * 6 ' 1 * 6 ' 1 * 6 ' 1 * 6 ' 1 * 6 ' 1 * 6 ' 1 * 6 6 * 1 ' 6 * 1 ' 6 * 1 ' 6 * 1 ' 6 * 1 ' 6 * 1 ' 6 * 1 ' 6 < 1 & / . 6 * 1 ' 9 ! - v
STEVAL-CCA029V1 revision history doc id 022892 rev 1 3/4 2 revision history table 1. document revision history date revision changes 13-jun-2012 1 initial release.
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