PLC810PG ( PFC is not used )

I'm not sure I understand your question completely. If you're currently using one of our HiperPLC products and don't need PFC functionality, I would suggest our HiperLCS products. If instead, you're using HiperPLC but don't need the LLC second stage, I would suggest our HiperPFS products.

For specific questions regarding our Hiper product family, please re-post your questions here:
http://www.powerint.com/en/forum/technical-forums/high-power-design


The link above is for the high-power product support forum and will put you in contact with engineers working specifically with these products.

-The Traveler

We are hoping to develop AC/DC converter(INPUT:AC100V、OUTPUT:DC14.8V 15A)
PFC function is not necessary because we need a high conversion efficiency.
HiperLCS is a very good product, but FET has been built in.
We want to use the external FET(Low on-resistance FET).
So,I think PLC810 is the best.
We want to use one of HiperPLC products and don't need PFC functionality.

In this case, where should GATEP,ISP and VCOMP be connected?
May NC(No connect) be sufficient? or pull-up or pull-down？

Please tell me.

Regards.

Again, this question would be best posted in the High-Power support forum so that you can get your questions answered by engineers intimately familiar with the Hiper product family.


However, I would like to point out that our Hiper LCS products are incredibly efficient and that Rds(on) is not the only factor in MOSFET losses. Even at conservative switching frequencies, MOSFET Coss and gate capacitance play a very large role in switching losses.


At Power Integrations we've developed our own MOSFET technology that emphasizes low gate and Coss capacitance. This gives us very low switching losses at the expense of conduction losses (Rdson). With HiperLCS, your switching frequencies will be much higher than in a typical power supply (250-500kHz) and the large Coss and gate capacitance of vertical MOSFETs will create significant switching losses.


Another important factor that will come into play at high switching frequencies is your transformer design. With our HiperLCS IC, a solid transformer design and other design considerations, you should be able to put together a power supply with VERY high efficiency.

-The Traveler

Thank you for the kind reply!
We understand that HiperLCS is excellent.
However,Warning is displayed to input 100V into Nominal LLC Input Voltage by PIXls Designer.
AC voltage is 100Vrms in Japan.
If we use in Japan HiperLCS, require a boost circuit?
If HiperLCS need a booster circuit,we would like to select the HiperPLC.
If HiperLCS do not need a booster circuit,we would like to select the HiperLCS.

Apart from this problem,
Please let me know about terminal processing(GATEP,ISP and VCOMP) of non-PFC in HiperPLC.

Regards.

Hi, there! See my post named "PLC810 loop stability", I used PLC810 without PFC module. All you need to do is to feed the FBP pin, and the PGND pin should be connected to GND. Unfortunately I encountered some problems with PLC810 described there, if you happen to solve these, let me know, plese.

HiperLCS was intended for use after some other power converter, typically a PFC boost stage of some kind.


Regarding the use of external MOSFETs and how to use the device pins for your situation, please post your question in the High-Power support forum.

-The Traveler