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It depends on what class of car design you look at. There are many with higher power than the 12V bridge amplifiers.

Here is one such IC for that market.

It depends on what class of car design you look at. There are many with higher power than the 12V bridge amplifiers.

I think your premises are false therefore the conclusion is also. If you are the rare person that needs 6kW 100V generator for an audio system, add a 2nd alternator.

Here is one such IC for that market.

The PMP11769 reference design is a complete solution for a 700W automotive external amp. The boost converter provides 36.0V @ 10.0A continuous / 20.0A peak from an input voltage of 9-16V. It contains two premium Class-D audio amplifiers, which provide 2x 175W @ 4-Ω load (left & right channel) and 1x 350W @ 2-Ω (subwoofer).The design is well suited for car audio external amp applications due to its thin profile and high power output.

• Interleaved Synchronous Boost + Audio Amplifier
• Output 36.0V @ 10.0A (continuous) / 20.0A (peak)
• Free-Running switching frequency of 250 kHz CCM
• one TPA3251D2 in stereo mode (175W 4Ω )
• one TPA3251D2 in mono mode subwoofer (350W 2Ω)
• -12.0V @ 50mA) with LM2841X-Q, +3.3V @ 50mA) with TPS7A6633-Q
• ~> 95% efficient 3~10A
• 0.6% V overshoot 10A to 20A

It depends what class of car design you look at. There are many with higher power than the 12 bridge amplifiers.

Here is one such IC for that market.

It depends on what class of car design you look at. There are many with higher power than the 12V bridge amplifiers.

Here is one such IC for that market.

It depends what class of car design you look at. There are many with higher power than the 12 bridge amplifiers.

Here is one such IC for that market  .

http://www.ti.com/tool/PMP11769

It depends what class of car design you look at. There are many with higher power than the 12 bridge amplifiers.

Here is one such IC for that market.