The IC I mentioned is IR uPFC controller IR1150. It is a small 
SOIC-8 power factor correction controller suitable for 75W to
3KW application. Originally I think they have a more ambitious
chip development (to integrated the power MOSFET inside) but
somehow it is very difficult to isolate the high power part (600V)
and the low power part (5V or <15V) of the IC. I am not so sure
whether they still has the plan. Anyway this IC is a serious 
competitor to TI/Unitrode's dominant PFC IC.

For those who are interested, please refer to the following
website: http://www.irf.com/acdc.

Regards,
Xiaofan

-----Original Message-----
From: Chen Xiao Fan 
Sent: Monday, July 11, 2005 10:28 AM
...
On a side note, IR has finally come out the new PFC control IC based 
on the patented one-cycle control of Dr K.M. Smedley of University
of California at Irvine. It is quite an interesting IC to look at
if you are interested in low power PFC applications.

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