6-way half axle drive.?

Hello, can you clarify how many motors it will need to be able to control bidirectionally, whether it's 1 motor or 6 motors?  You'll need a full-bridge (two half bridges) per motor that needs to move bidirectionally (forward and reverse).  

I'm guessing it's only 1 or 2 full bridges, in which case either the DRV8770 or DRV8844 should work for you: https://www.ti.com/motor-drivers/brushed-dc-bdc-drivers/products.html#p2716max=50.01;115&p1192=-40;125

If it needs to control 6 motors the DRV8912-Q1 can provide 6 full-bridges but only up to 40V.   

Regards,

Jacob