Other Parts Discussed in Thread: RM57L843, , TIDA-00548, TPS65381EVM, TPS62170
Hi,
I'd like to power a RM57L843 with a TPS65381A-Q1. I need to consider a +24VDC input.
I've noticed there is a lack of available reference designs for this configuration. I have found a few reference options:
1. RM46CNCD
2. TIDA-00548 (Which is a 4-20mA reference design + RM41)
3. SLVA830 (Power steering reference design).
4. TPS65381EVM
There are other designs available for powering TMS570 devices from the TPS65381
The RM57L843 needs 1.20V at 1350mA and therefore I have two options as I see it.
1. Implement an external FET connected to the TPS65381A-Q1 and manage the heat dissipation.
2. Implement an external buck controller, such as in TIDA-00548 and use its output as the 1.2V feedback into the TPS65381A-Q1.
I feel solution 1 is the easiest path, but I'm very concerned about thermal issues as I know the RM46CNCD boards have exhibited a fair amount of heat in the past. I can't find a webench option for TPS65381 so its difficult to check the performance.
Can anyone provide any suggestion or feedback to my points 1 or 2 above, and more-over is there a RM57L843 + TPS65381 reference design available?
Thanks
Stomp!