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FAN7530 PFC controller: Alternatives or UK suppliers

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tomizett

Active Member
Hi all,
I've got a board here with a dead PFC controller, a Fairchild FAN7530, which I need to replace.
This seems to be unavailable from any of my usual UK suppliers (RS, Farnell) so I was wondering if anyone knows of an equivalent alternative or somewhere (other than eBay) where I might be able to buy one?

For reference, I've been through the list of parts that RS do stock and none of the following appear to be a suitable drop-in replacement:
NCP1654BD65R2G
AP1662MTR
NCP1608BDR2G
MC33262DG
NCP1611ADR2G
L6562D
L6562ADTR
UCC28019AD
ICE2PCS01G
NCP1653DR2G
IR1155SPBF
IR1155STRPBF
MC33262DR2G
ICE2PCS02G
L6562ATD
MC34262DG
NCP1653ADR2G
UCC28019D
IR1152SPBF
TDA4863
L6562DTR
NCP1611BDR2G
NCL30002DR2G
AP1682MTR
NCP1654BD133R2G
L6562AD
TDA4863
MC33262DG
MP44010HS


Thanks for reading!
 

MikeMl

Well-Known Member
Most Helpful Member
Here is why

You will have to deal with the "new old stock" folks.
 

tomizett

Active Member
Thought as much... thanks!
Doesn't look like it was a design that caught on.
 

spec

Well-Known Member
Most Helpful Member
Hi all,
I've got a board here with a dead PFC controller, a Fairchild FAN7530, which I need to replace.
This seems to be unavailable from any of my usual UK suppliers (RS, Farnell) so I was wondering if anyone knows of an equivalent alternative or somewhere (other than eBay) where I might be able to buy one?

For reference, I've been through the list of parts that RS do stock and none of the following appear to be a suitable drop-in replacement:
NCP1654BD65R2G
AP1662MTR
NCP1608BDR2G
MC33262DG
NCP1611ADR2G
L6562D
L6562ADTR
UCC28019AD
ICE2PCS01G
NCP1653DR2G
IR1155SPBF
IR1155STRPBF
MC33262DR2G
ICE2PCS02G
L6562ATD
MC34262DG
NCP1653ADR2G
UCC28019D
IR1152SPBF
TDA4863
L6562DTR
NCP1611BDR2G
NCL30002DR2G
AP1682MTR
NCP1654BD133R2G
L6562AD
TDA4863
MC33262DG
MP44010HS


Thanks for reading!
Hy Tomizett,

I think that the FAN7930: https://www.fairchildsemi.com/datasheets/FA/FAN7530.pdf is a direct replacement for the FAN7530: https://www.fairchildsemi.com/datasheets/FA/FAN7930B.pdf

The FAN7930 is available from DigiKey for example: http://www.digikey.com/product-detail/en/fairchild-semiconductor/FAN7930BMX/FAN7930BMXCT-ND/3687190

spec
 
Last edited:

tomizett

Active Member
Thanks spec.
Close, but I don't think it's quite right (or am I missing something?). The 7530 uses pin 2 to set the slope of the internal ramp generator, whereas the 7930 uses it as the input to the over-voltage protection comparator.

These Failchild parts seem to be a bit unusual in that they don't require a sensing network from the rectified mains - this seems to be related to what they describe as the "voltage-mode" rather than "current mode" control... I've not read the datasheet in enough depth to really understand this yet. Nevertheless, there are lots of parts which have a line-voltage sensing input on pin 3 and compensation on pin 2 - but irritatingly that's no help to me!

<postscript>
...I suppose I could put in a 7930 and just leave OVP pulled low. As long as the oscillator was in the right range it should work...
 

spec

Well-Known Member
Most Helpful Member
Thanks spec.
Close, but I don't think it's quite right (or am I missing something?). The 7530 uses pin 2 to set the slope of the internal ramp generator, whereas the 7930 uses it as the input to the over-voltage protection comparator.

These Failchild parts seem to be a bit unusual in that they don't require a sensing network from the rectified mains - this seems to be related to what they describe as the "voltage-mode" rather than "current mode" control... I've not read the datasheet in enough depth to really understand this yet. Nevertheless, there are lots of parts which have a line-voltage sensing input on pin 3 and compensation on pin 2 - but irritatingly that's no help to me!

<postscript>
...I suppose I could put in a 7930 and just leave OVP pulled low. As long as the oscillator was in the right range it should work...
Oh dear, I missed that point, but I must admit that I didn't check every detail of the two chips.:)

But your work-around should allow you to use a FAN7930.

spec
 
Last edited:

tomizett

Active Member
It's starting to look like that might be the only option!

Thanks for your input anyway.
 
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