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Electronics => Projects, Designs, and Technical Stuff => Topic started by: nunojpg on April 09, 2019, 05:00:59 pm

Title: Identify FC2rJT step-down regulator SMD
Post by: nunojpg on April 09, 2019, 05:00:59 pm

I have a consumer TP-LINK Archer C20 router which comes with a 9V brick and I would like to check if I can feed it with unregulated voltages up to 15v.

This is the regulator circuit. Input 9V and output 3.3V. Any luck getting the part number to check the voltage specs?

(https://i.imgur.com/ahqVFYc.jpg)

Title: Re: Identify FC2rJT step-down regulator SMD
Post by: mariush on April 09, 2019, 05:25:39 pm

Maybe it's this one.. pinout seems to match and datasheet mentions FC2 as marking :

fitipower integrated technology lnc FR8204

https://datasheet.lcsc.com/szlcsc/Fitipower-Integrated-Tech-FR8204S6CTR_C172766.pdf

Low RDS(ON)Integrated Power MOSFET(170mΩ/90mΩ)
Internal Compensation Function
Wide Input Voltage Range: 4.5V to 18V
0.8V Reference Voltage
2AOutput Current
500kHzSwitching Frequency
1msSoft-StartTime
Cycle-by-Cycle Current Limit
Over-Temperature Protectionwith Auto Recovery
Under Voltage Lockout
Hiccup Short Circuit Protection
SOT-23-6 Package

Title: Re: Identify FC2rJT step-down regulator SMD
Post by: nunojpg on April 09, 2019, 05:36:44 pm

The reference voltage is 0.8V as on that datasheet. Looks good. Thanks!

Title: Re: Identify FC2rJT step-down regulator SMD
Post by: amyk on April 10, 2019, 01:34:14 am

A good way to confirm is to look at images from sellers of the part:
https://detail.1688.com/offer/590026600855.html