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 = 8 , V = 9 V L CC 5 W + 5 W continuous output power at THD = 10%, R = 4 , V = 6.5 V L CC 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. June 2012 Doc ID 022892 Rev 1 1/4 For further information contact your local STMicroelectronics sales office. www.st.com 4%/0 .* 61 120,1 / * ,1 %/0 .* 61 %/0 .* 61 %/0 .* 61 %/0 .* 61 - %/0 .* 61 %/0 .* 61 - 087( 9 %/0 .* 61 %/0 .* 61 %/0 3* 61 2871% 2871% - - - -0 3 -0 3 - %/0 3* 61 2873% 526& 2873% 6<1&/. X) 6<1&/. - - %/0 3* 61 23,1,21 2871 2871 - - %/0 3* 61 2873 2873 Schematic STEVAL-CCA029V1 1 Schematic Figure 1. Circuit schematic & & & & S) S) S) S) & 9 X) / / / / / / / / / 9 Q) & Q) & 6*1 / / / / 5 & 5 & 5 5 S) S) & Q) & & & & Q) Q) 6*1 6*1 6*1 695 95() 39&&% 39&& 39&& 39&&% 3*1 3*1 3*1 % 3*1 % ,& 7 3 7 /3 ,11 6*1 9 6 , * * ,1 * ,1 69&& 696 68%B*1 9 3: 3*1 ,13% ,11% 67%< ,13 & N & & & & Q) & Q) & Q) Q) 1*1* 66 6*1 1*61*1**1 6*1 6*1 6*1 1* 1* *1* 1 Q) 66 6 & . Q) 5 & Q) 5 N 5 5 6*1 5 5 & Q) G% G% G% G% 6*6111**6 Q) Q) Q) Q) & & 9 & & 6*1 9 9 9 9 * ,1 9 9 9 9 * ,1 6*1 - V 2/4 Doc ID 022892 Rev 1 6 6 6 6 6*1 & & & &