TDA7491LP 2 x 5-watt dual BTL class-D audio amplifier Features 5 W + 5 W continuous output power: R = 8 , THD = 10% at V = 9 V L CC 5 W + 5 W continuous output power: R = 4 , THD = 10% at V = 6.6 V L CC Wide range single supply operation (5 V - 14 V) High efficiency ( = 90%) PowerSSO-36 with Four selectable, fixed gain settings of exposed pad down nominally 20 dB, 26 dB, 30 dB and 32 dB Differential inputs minimize common-mode noise Description Filterless operation The TDA7491LP is a dual BTL class-D audio No pop at turn-on/off amplifier with single power supply designed for Standby and mute features LCD TVs and monitors. Short-circuit protection Thanks to the high efficiency and Thermal overload protection exposed-pad-down (EPD) package no separate heatsink is required. Externally synchronizable Furthermore, the filterless operation allows a reduction in the external component count. The TDA7491LP is pin-to-pin compatible with the TDA7491P and TDA7491HV. Table 1. Device summary Order code Operating temperature Package Packaging TDA7491LP -40 to 85 C PowerSSO-36 EPD Tube TDA7491LP13TR -40 to 85 C PowerSSO-36 EPD Tape and reel March 2011 Doc ID 13541 Rev 5 1/37 www.st.com 37 Contents TDA7491LP Contents 1 Device block diagram 6 2 Pin description . 7 2.1 Pin out 7 2.2 Pin list . 8 3 Electrical specifications 9 3.1 Absolute maximum ratings . 9 3.2 Thermal data . 9 3.3 Electrical specifications 10 4 Characterization curves . 12 4.1 With 4- load at V = 6.6 V 12 CC 4.2 With 8- load at V = 9 V . 19 CC 5 Applications information 24 5.1 Applications circuit 24 5.2 Mode selection . 25 5.3 Gain setting . 26 5.4 Input resistance and capacitance . 26 5.5 Internal and external clocks . 27 5.5.1 Master mode (internal clock) . 27 5.5.2 Slave mode (external clock) 27 5.6 Modulation 28 5.6.1 Reconstruction low-pass filter 29 5.6.2 Filterless modulation . 29 5.7 Protection functions . 31 5.8 Diagnostic output . 31 5.9 Heatsink requirements . 32 5.10 Test board . 33 6 Package mechanical data 34 2/37 Doc ID 13541 Rev 5