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Putting multiple devices on the same heatsink?

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cupoftea

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Hi,
Do you think putting PFS7527H and TFS7703H on the same heatsink would cause noise issues?
After all, they both have the controllers on the package too.
I usually just do discrete converters, so never used these with the controller in with the power switching devices.

PFS7527H PFC controller….
https://www.power.com/products/hiper/hiperpfs-3/pfs7527h

…and a TFS7703H Two transistor forward controller….
https://www.power.com/products/hiper/hipertfs-2/tfs7703h
Power integration FAEs came to our company with one of the above evaluation boards for battery charger application. PFC boost + LLC HB converter integrated IC mounted on a single heatsink. Not sure about EMI/EMC but mostly thermal was a problem to resolve in this kind of integrated ICs
 
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