Typical application circuit of LM4911 for dual-channel amplifier

As shown in the figure, this is a typical application circuit of LM4911 for dual-channel amplifier. The left and right channel audio signals are input to the 1st and 5th pins of LM4911 (MSOP package) respectively, and are output from the 9th, 7th and 8th pins respectively after being amplified by the internal amplifier, and are added to the speakers of each channel through the coupling capacitor Co. The maximum power consumption of the amplifier is PDMAX = VDD2/2π2RL (output capacitor coupling mode). The 2nd pin of LM4911 is externally connected to the shutdown control. When the 2nd pin is connected to VDD (high level), it is allowed to work, and when it is connected to low level (ground), it is prohibited to work, reducing the power consumption of the chip.