UC2901-EP: Thermal resistance from junction to the board/mount

Hi Yoon,

Unlike a PWM controller, the UC1901 doesn't have a driver OUT stage, so I expect it will dissipate very little power. 

Because the UC1901 is a legacy IC nearly 30 years old, I will not be able to produce the missing thermal impedance value you are asking about. If you select an exact package, we may be able to find a separate power management device in the same package, consider using whatever thermal impedances are given for that device and apply them to UC1901 - this is a crude approach but I expect the result would yield higher calculated junction temperature than what the UC1901 might experience in a working circuit?

Best,

Adhvaidh

Hi Yoon,

This OPN "V62/07609-01XE" belongs to the same family of devices (UCx901), and unfortunately, my answer still remains the same from my previous comment.

Thanks.

Best,

Adhvaidh