Synchronizing two UC3525

Stanislav Staud82651

Hi all,

i would to ask you if is possible synchronizing two UC3525 connecting osc (first IC) to sync (second IC)? The second IC have to (I think) work with lower oscilation frequency.

What do you mean? It's right?

Sorry for my english.

Regard's Standa

over 14 years ago

0 Deep M over 14 years ago

Prodigy 95 points

Hi,

I think, you would be able to synchronise the two ICs in master slave mode i.e. by connecting the osc output of master to the sync input of the slave.

For this to work satisfactorily, the oscillator frequency of slave should be around 90% of that of the master.

If thissytem does not work,then you should generate a separate synchronising clock and sync any number of ICs.

Thnaks and Regards,

Deep.

0 John Bottrill over 13 years ago

TI__Mastermind 25130 points

Standa,

Did you solve your problem?

John

0 Stanislav Staud82651 over 13 years ago in reply to John Bottrill

Prodigy 20 points

Hi all,

yes, I did. The ICs work perfectly. The master have set 50kHz and slave about 45kHz.

But, I deal with how to make it, that the second IC will "synchronized" with 25 % delaying. Two converters connected parallel will have higher output frequency (full bridge converter with full bridge rectifier).

Standa

0 Deep M over 13 years ago in reply to Stanislav Staud82651

Prodigy 95 points

Somehow delay the synchronizing pulse. Find the time period of the pulse corresponding to 50kHz and shift the synchronizing pulse by 25% of it.

0 hao chai over 11 years ago in reply to John Bottrill

Prodigy 10 points

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Synchronizing two UC3525