PMP4259: UCC28070A

omid hamidi

Part Number: PMP4259

ON WORKBENCH WHEN MAKE DESIGN 3KW 180-260V AC RA1-RA6 CALCULATED 1MOHM 0.75W SIZE 1210 BOUT IN TI REFRNCE PMP4259 USED 1206 0.25W WHICH ONE IS CORRECT IN CALCULATION 1206 0.25W IT IS OK MUST WORK THIS MAKE ME CONFUSED

ANOTHER ONE RDMAX IN WORKBENCH USED DIP 1/4W BOUT IN PMP4259 USED 1/16W SIZE 603 WHY IN WORKBENCH USED MORE BIGER SIZE THIS PARTS ON OVERLOAD WORKING …?

IN THIS REFRENCE USED SRW42EC-HP16 INDUCTOR IN PICTURE NOT IS IRON POWDER CORE WHICH MATERIAL USED OR THIS CORE ?

ANY RECORD HAVE TEMP IN MAX POWER HOW MUCH ?

over 5 years ago

0 Ryan Manack over 5 years ago

TI__Intellectual 2610 points

Hello,

Thank you for your questions. I am reviewing them, and looping in another one of my experts. However, you reference RA1 - RA6. I have looked in the datasheet and PMP4259 design, and I cannot find these reference designators. Can you please advise in PMP4259 which components you are referring to?

Thank,
Ryan

0 Richard Yin over 5 years ago

TI__Prodigy 480 points

Hi omid,

Neither I can't seen the RA1-RA6 in schematic. But I think these resistors should be 1206 1M ohm is no problem to this design. I think the consideration is not only the power rating, also the high voltage capability.

For the choke of PFC. Yes, it is wrong in toroid. It should be Ferrite Core.

This is very old project. I think the report not include the thermal.

Please feel free to feedback if any question.

Regards,

Richard

0 omid hamidi over 5 years ago in reply to Ryan Manack

Intellectual 405 points

attach pmp4259 and web design file

please see ra1-ra6 in web design and rdmax w= 250mw used dip bout in pmp4259 used smd 603 1/16w

WBDesign24.pdf 3KW.rar

0 Richard Yin over 5 years ago in reply to omid hamidi

TI__Prodigy 480 points

Hi,

I think PMP4259 is old design. You are right. This resistor might be unsuitable for High Voltage sense. It should be 1206 package.

Regards,

Richard

Simulation, hardware & system design tools

Simulation, hardware & system design tools forum

PMP4259: UCC28070A