Audio amplifier makes e-cars’ voice heard
Along with a loudspeaker, Toshiba’s TB2909FNG power amplifier turns the AVA signals into audible sound. Besides AVA signals it also supports other sound-generating systems in the car, such as reverse warning systems and the confirmation beeps from the Remote Keyless Entry. Implemented as a single-channel, class AB, single-ended push-pull amplifier the TB2909FNG delivers 5W to the loudspeaker. The device is automotive-qualified and designed to operate under rather extreme temperature conditions from -40°C to +110°C.
It is expected that AVA systems will become mandatory because a minimum noise level is required for safety reasons, in particular for vehicles at very low speed. Typically carmakers imitate the sound of a conventional combustion engine – this has the most pronounced alerting effect to pedestrians.
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