The bootstrap lines must be connected together and the bootstrap capacitor must be increased: for N devices the bootstrap capacitor must be 22 μF times N. The slave STANDBY and MUTE pins must be connected to the master STANDBY and MUTE pins. The slave SGND pin must be tied to the negative supply. The outputs can be connected together without the need of any ballast resistor. The master chip connections are the same as the normal single ones. The figure below shows the connections required to configure two devices to work together. The slave power stages are driven by the master device and work in parallel together while the input and the gain stages of the slave devices are disabled. In this type of application one device acts as a master and the others as slaves. The modular application allows very high power be delivered to very low-impedance loads. The modular application is where several devices operate in parallel. High output power can be delivered to very low impedance loads, so optimizing the thermal dissipation of the system. Thanks to the wide voltage range and to the high output current capability it is able to supply the highest power into both 4-Ω and 8-Ωloads.The built-in muting function with turn-on delay simplifies the remote operation avoiding on-off switching noises.Parallel mode is possible by connecting several devices and using pin11. The slave power stages are driven by the master device and work in parallel together whileĬlass AB amplifier in Hi-Fi field applications, such as home stereo, self powered loudspeakers and Topclass TV.In this type of application, one device acts as a master and the others as slaves.The modular application allows very high power to be delivered to very low-impedance loads.
The modular application is where several devices operate in parallel.
TDA7293 in parallel power audio amplifier
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