cupoftea
Advanced Member level 5
Hi,
We have been amazed at how there is not one single PWM controller for offline flyback that has the following basic functions..
1….ability to set switching frequency from at least 30kHz to 80kHz range.
2….Has overload protection (ie goes into hiccup or latch off when control voltage has railed high for ~300ms or so)
3….Not quasi resonant
4…Current mode
5….Burst mode or skip cycle for low_power/no_load situations
6...Ability to have RC current sense filter fitted.......(ie without so much current getting sourced from the CS pin that you can't have a CS pin filter.)
7...Not internal Power FET.
8....In stock and available to order in MOQ =1+
The nearest to this is L6566, but it has no overload protection.
Do you know of a chip that has 1 to 8?
FAN7554 seems almost there, but nobody has it in stock
We have been amazed at how there is not one single PWM controller for offline flyback that has the following basic functions..
1….ability to set switching frequency from at least 30kHz to 80kHz range.
2….Has overload protection (ie goes into hiccup or latch off when control voltage has railed high for ~300ms or so)
3….Not quasi resonant
4…Current mode
5….Burst mode or skip cycle for low_power/no_load situations
6...Ability to have RC current sense filter fitted.......(ie without so much current getting sourced from the CS pin that you can't have a CS pin filter.)
7...Not internal Power FET.
8....In stock and available to order in MOQ =1+
The nearest to this is L6566, but it has no overload protection.
Do you know of a chip that has 1 to 8?
FAN7554 seems almost there, but nobody has it in stock
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