UCC256301: Is this part intended to replace UCC25600 - recommendation for new designs

UCC25600 is an active device and still adopted and used in new designs. There is no intention to replace UCC25600 with UCC25630x.

TIDA-01501 power rating is 450W, not 700W. Please let me know where you see 700W for TIDA-01501.

A rule-of-thumb is half-bridge LLC may be used in power rating up to 500W, so 600W seems a bit stretch but should be ok if design it carefully.

Extend half-bridge LLC to over 1kW is with a bit challenge. MOSFET driving capability is one of the concerns as the design may need to have MOSFETs in parallel for power over 1kW. Besides, the half-bridge capacitors can get too big. A full bridge LLC can be considered to extend to power over 1kW. But you need to design to find out if acceptable in your case. So these are on rule-of-thumb and not a divide line.

UCC25630x has an integrated half-bridge driver. If you use external driver to extend its driving capability, the integrated half-driver may become a waste.

On how to make charging V-I profile, you may need to talk to TI battery charge technology team. So this is a different topic that needs to get that team's help. We can help to re-direct your questions to that team. Please let us know.

It looks like I misinterpreted the power output capability of TIDA-01501; in the document TIDUDH6A, which discusses TIDA-01501 design, it looks like the main output is 12 V at 37.5 A (450 W) but it also has two other outputs, rated 5 V at 30 A (150 W) and 3.3 V at 30 A (99 W) and that all adds up to 699 W but I see now those are not simultaneous, since the PFC and primary side was designed for 450 W.

I was leaning toward a resonant-mode/LLC topology thinking it would provide better efficiency, lower EM noise, simplicity, small size, and lower cost. If a half bridge is too much of a stretch for 600 W output, can you suggest a suitable IC (and maybe a reference design) that would be a good match for this using a full bridge? This is a fairly high-volume, cost-sensitive (hence no PFC, at least for 600 W) application, and we’ll eventually need various power levels (e.g. 600 W, 1200 W, and possibly higher) so I want to investigate the most optimum design for each power level.

My second question was regarding the circuit detail for using an MCU to set the output voltage, which might range from 0 to 15 volts, (depending on the output current and the programmed profile). I’m sure I can implement a D/A signal as a voltage reference for that, but if there’s a good established circuit topology worked out already that would be interesting to see. And would there be an issue with loop stability for the full range of output voltage, and from no load to full load current?

And yes I am very interested in the charging-profile expertise that TI may be able to offer! In particular, I’d be interested in their recommendation for lead-acid and lithium-ion batteries, and if they know of a way to identify which type is present electronically based on its (voltage-current-time-temperature) load characteristics.

Thanks for your help!
Mike

We've reviewed our requirements and output below 12 volts does not need to be at full current. Even a very low current would be okay; what's needed is to automatically detect when the voltage can return to normal level (12 V to 14.4 V). So the OCP activation could be okay. Full output (40 A) is needed at 13.6 volts. At other voltages between 12 and 14.4 can be at lower current. So maybe this part is feasible for this application?