TPS51220A: Differences between TPS51220 and TPS51220A

Hi Gareth,

Thanks for reaching us!

Please refer to below table to get TPS51220 vs TPS51220A difference info.

Hi Gareth,

1. For inductor selection, we suggest to choose the inductor to achieve 30%~40% IL ripple. However, based on their design, the 12V rail's max IL ripple is as large as 490%, device will always work in DCM mode. Suggest them to increase inductance or switching frequency to meet 30%~40% IL ripple.

2, For controller application, they should pay attention to current limit setting. Did they used Equation 19~20 to calculate Iocl? If not, please check it carefully, to make sure the Iocl setting is what they want, and should be lower than inductor Isat.

We suggest IMON-pin float if unused.