Trouble finding Replace Dual Mosfet 3v and 5v +VALW, Cryptic Chinese part numbers

[flatline]

PU201 (SYX198BQNC) Dual Mosfet

PU202 (SYX198CQNC) Dual Mosfet

Is there a way to reverse engineer the schematic and cross reference a compatible mosfet? I could order from china, but there are no pdf specifications for these mosfets. but I am sure there are similar dual mosfets closer to home.

I couldn't find the schematic anywhere without paying, so here it is!!!!

[anshad]

Re: Trouble finding Replace Dual Mosfet 3v and 5v +VALW, Cryptic Chinese part number

PU201 and PU202 are not Dual Mosfets but an Integrated Circuit which has PWM, Upper Gate and Lower Gate in a single package. In my knowledge there is no compatible IC chips but you have to use the exact same Chip if faulty.

However it is less likely that both chips gone bad at the same time. If your issue is missing 3 and 5 volt, it could be due to other reason like missing Enable signal etc. Check the IC requirements are met first before blindly ordering new chips from China.

[piernov]

Re: Trouble finding Replace Dual Mosfet 3v and 5v +VALW, Cryptic Chinese part number

Fully agree with @anshad on this.
Just adding that on top of being integrated voltage regulator with buck converter, they also have an LDO output. The LDO output are usually always enabled, the buck converters are usually not.

[flatline]

Re: Trouble finding Replace Dual Mosfet 3v and 5v +VALW, Cryptic Chinese part number

Yes, The TPS51367 has a short, and PU201(SYX198B) 3V was fried.
Here is the link to a few datasheets on these components. I just thought maybe replace both 5V and 3V just to be safe.


https://www.chinafix.com/thread-995470-1-1.html


So SiLERGY Has a Monopoly on these IC's? It's not like mosfets where you can find cross reference?

[anshad]

Re: Trouble finding Replace Dual Mosfet 3v and 5v +VALW, Cryptic Chinese part number

Yes, The TPS51367 has a short, and PU201(SYX198B) 3V was fried.
Here is the link to a few datasheets on these components. I just thought maybe replace both 5V and 3V just to be safe.


https://www.chinafix.com/thread-995470-1-1.html


So SiLERGY Has a Monopoly on these IC's? It's not like mosfets where you can find cross reference?

This SiLERGY chips are fairly new and can only find in recent boards. Richtek has also some all in one chips like these and some of them are pin compatible with SiLERGY chips. For example, Richtek's RT7238B is pin compatible with SiLERGY's SY8208B. However in your case, i am unsure whether Richtek has any substitution to offer. Usually i always prefer to go for an exact replacement and look for a substitute only in case no original is available