How to convert the 12v dc output of a 80ah car battery to 16v dc to satisfy the power supply of TB2946HQ Audio amplifier (which is a 4 channel stereo car amplifier with 49w output on each channel).
Are you sure you want to run this chip that hard? You get 49 W only at very large distortion levels, a very common problem with the way audio power amplifier chips are specified.