Other Parts Discussed in Thread: TPS53681, TPS53647
Hi
How to use 2 x TPS40322 as Master and Slave (4 channels)?
These 2 pictures below are from datasheet. Apart from SYNC pin, what pin that I must connect between 2 x TPS40322.
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Hi Kamolwan,
TPS40322 can not be used for 4phase design. The current sharing can not be achieved between two parts.
Below parts can be considered for 4phase design.
2xTPS40425, TPS53647, TPS53681
Thanks
Qian
Hi Qian,
Thank you for your answer.
If SYNC pin doesn’t used for 4 phase, what does synchronizing 2 TPS40322 devices as shown in pictures (first comment) is used for?
Thanks
Hi Kamolwan,
The sync picture in your post just shows how to sync achieve 90 degree phase shift between all four phases. The purpose is to reduce the input voltage ripple and noise.
This circuit can not achieve current sharing between four phases. That's why 2xTPS40322 can not be used for 4phase, one output design.
Thanks
Qian