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Help identifying a 6-pin SMD IC in a power supply.

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GonzoTheGreat:
Guys,

Could you help me identify the 6-pin SMD integrated circuit, that functions in the schematic attached below (marked in blue)?
The SOT23-6 package has the markings C1EH (or CIEH) and 9013, but I cannot find these markings in any datasheets I looked at.

Thanks in advance,
Gonzo


jdraughn:
Looks pretty close http://www.richtek.com/m/Products/AC_DC/Flyback%C2%A0Controller/R7711A

GonzoTheGreat:
Thank you for trying to help me, unfortunately the R7711A chip has the VDD on Pin3 and the Gate driver on Pin1, while this mystery chip has the VDD on Pin1 and the Gate driver on Pin3.

Also, the SOT23-6 markings are different.  See the attached datasheet...

GonzoTheGreat:
Some additional info. 
The switching frequency of this mystery IC is 24kHz.

BrianHG:
You have Pin1 mislabeled in your schematic.  Rotate the R7711A by 180 degrees in the data sheet and see how the pins line up.
However, I still can be wrong...  Because now, pin 6 and 4 are actually backwards.
Did you draw this schematic?


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