Buck Converter Clock Synchronization

Zul fikri

Prodigy 120 points

Other Parts Discussed in Thread: TPS43061, TPS65261-1

Hi,

It is possible to synchronize clock of buck converter TPS65261-1 (master) and boost converter TPS43061 (slave)?

Thank you for your answer.

over 9 years ago

0 Jason Wang (BSR-MV) over 9 years ago

TI__Genius 9550 points

hi,

It is hard to approach your target.

TPS65261-1 is FCC mode, so LX is a stable signal which can used as clock for TPS43061. But the LX pulse will stop when OV, OC, OT occur.

Jason Wang

0 Zul fikri over 9 years ago in reply to Jason Wang (BSR-MV)

Prodigy 120 points

Hi Jason,

Tqvm for your help. Can i just connect the ROSC pin of TPS65261-1 to RT/CLK pin of TPS43061 in order to sync their clock?

Zul fikri

0 Jason Wang (BSR-MV) over 9 years ago in reply to Zul fikri

TI__Genius 9550 points

Zul fikri,

ROSC pin is only a stable voltage about 0.5V, so the cuicuit you mentioned can't be used.

Jason Wang

0 Zul fikri over 9 years ago in reply to Jason Wang (BSR-MV)

Prodigy 120 points

Tq Jason. I got it.
Is there any alternative of 3 output buck converter to replace the TPS65261-1 which can generate clock to sync to TPS43061 without using external clock?
Your suggestion/help is much appreciate.

Zul Fikri

Power management

Power management forum

Buck Converter Clock Synchronization