Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

NCP1239 Fault pin current

cupoftea

Advanced Member level 5
Joined
Jun 13, 2021
Messages
2,712
Helped
54
Reputation
108
Reaction score
116
Trophy points
63
Activity points
14,342
Hi,
The NCP1239 has a fault pin, for use in overtemperature shutdown.
A 44uA current flows out of it. You shoudl connect an NTC to it.
This then produces a voltage, and if under 0.43V, then you trip on overtemp.

But most NTCs are 10k at 25c...and 10k*44uA = 0.44V.

This seems a bit too near to the trip point, may i ask have i missed something.?

NCP1239
 

LaTeX Commands Quick-Menu:

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top