TPS62913: multiple components on one board

Yoav Benita

Part Number: TPS62913

Hello,
In my board I will use three components of TPS62913RPUR. Since this is a small board, they may be close to each other.
Which is better in terms of EMI compatibility, to use the same switching frequency or to separate?
The three components are uses the same input voltage (9V), and converted to three different voltages (5V, 3.6V, 1V).
Thanks

over 2 years ago

0 Steve Schnier over 2 years ago

TI__Expert 4600 points

Hello,

Thanks for a great question. The TPS62913 has a SYNC feature for this case, where all three devices can be synchronized to the same switching frequency to eliminate any beat frequencies due to slightly different switching frequencies. However, if you don't have an external clock to sync to, you can use the SW node of one TPS62913 to drive the EN/SYNC pin of the other devices as shown in sectin 1.4 of the following application note: https://www.ti.com/lit/SLYT465. Alternately, you can employ spread spectrum for each TPS62913, which will also avoid beat frequencies.

0 Yoav Benita over 2 years ago in reply to Steve Schnier

Prodigy 185 points

Thanks

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TPS62913: multiple components on one board