rxpu
Member level 3
I am trying to find a best suitable way to synchronize the phase and frequency of multiple LLC converter modules to achieve better EMI and better voltage regulation when they are supplying the same load.
The physical arrengement: The LLC converter is an all in one PCB containing half bridge,magnetics and synchron. rectifiers. Each converter PCB is 18cmx20cm and they are stacked one on another. The distance between the pcbs are approx 6cm.
The total length of the tower is (having 9 boards) approx. 54cm
The current configuration:
Each board have its owm controller a dspic33 delivering a variabe freq. PWM
Freq range: 80kHZ-150kHZ. Power of each converter 2100W , Secondary output 3.6V..6.8V @300A
Each converter has a galvanically isolated input for its half bridge drivers.
What is the best suitable way to synchronize the phase and frequency of each converter to a reference phase and frequency. the maximum distance may be 50-60cm
I saw some LVDS chips for long distance transmission. Such as
https://www.ti.com/lit/an/snla165/snla165.pdf
But I dont have any experience for LVDS chips.
Any ideas?
The physical arrengement: The LLC converter is an all in one PCB containing half bridge,magnetics and synchron. rectifiers. Each converter PCB is 18cmx20cm and they are stacked one on another. The distance between the pcbs are approx 6cm.
The total length of the tower is (having 9 boards) approx. 54cm
The current configuration:
Each board have its owm controller a dspic33 delivering a variabe freq. PWM
Freq range: 80kHZ-150kHZ. Power of each converter 2100W , Secondary output 3.6V..6.8V @300A
Each converter has a galvanically isolated input for its half bridge drivers.
What is the best suitable way to synchronize the phase and frequency of each converter to a reference phase and frequency. the maximum distance may be 50-60cm
I saw some LVDS chips for long distance transmission. Such as
https://www.ti.com/lit/an/snla165/snla165.pdf
But I dont have any experience for LVDS chips.
Any ideas?
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