integrated power Management TPS65930 , OMAP3530

hi all,

we are designing customised OMAP3530 board, we have supposed to use TPS65930BZCH,but this is absolute now, so we are planing to use TPS65930A2ZCH.

please tell me what is the difference between them and what B Z C H and A 2 Z C H stands for ..?

thanks and regards

N Reddy