TPS543C20: Does tps543c20 support stack 4x for up to 160 A?

user4351886

Part Number: TPS543C20
Other Parts Discussed in Thread: TPS543B20, TPS546D24, TPS546D24A

If the slaves are set to 90 degrees, 180 degrees, 270 degrees, then direct SYNC, VSHARE and ISHARE between master and slaves.

can work with stack 4x?

over 6 years ago

0 JohnTucker over 6 years ago

TI__Guru**** 191445 points

Jing,

TPS543C20 is 2X stackable only. You can adjust the phase interleave for the case where there is an external clock.

0 JAMES MARR97 over 6 years ago in reply to JohnTucker

Prodigy 50 points

OK I'll bite - Why would they have all the interleaves available for 1X 2X 3X and 4X stack and you say its a max of 2X stacks?

0 JohnTucker over 6 years ago in reply to JAMES MARR97

TI__Guru**** 191445 points

James,

Depending on the converter duty cyles including other converters on the same input voltage, it may be advantageous to operate at other than 180 degree interleaving.

0 JAMES MARR97 over 6 years ago in reply to JohnTucker

Prodigy 50 points

The reason you stack them is to increase the output current. They all have the same output voltage and duty cycle. Are you telling me you cant have one master and 3 slaves and drive them all with the master Vshare and Ishare and adjust each interleave for 90 degree separation and have a nice 4 phase 160A power supply? If you can't do 4 I see no reason you can even do 2.

JMarr

0 JohnTucker over 6 years ago in reply to JAMES MARR97

TI__Guru**** 191445 points

James,

Phase interleaving is used to reduce imposed ripple on the input voltage rail. In many applications there are multiple output voltages derived from a common input. For just two TPS543C20 stacked, the 180 degree interleave is the logical choice suppose you have a third (different voltage output) synchronized to the same external clock. Then 120 degree or 240 degree may be a better option. In any case, TPS543B20 is only 2X stackable.

0 JAMES MARR97 over 6 years ago in reply to JohnTucker

Prodigy 50 points

Jing,

Check out the TPS546D24 chip. This is a 40A 4X stackable chip but we are going to see if TI has a better data sheet for it!

JMarr

0 JohnTucker over 6 years ago in reply to JAMES MARR97

TI__Guru**** 191445 points

James,

TPS546D24 will not be widely released. The replacement TPS546D24A will release in possibly in December.

Power management

Power management forum

TPS543C20: Does tps543c20 support stack 4x for up to 160 A?