R
Randy Day
- Jan 1, 1970
- 0
I've built some TTL motor/relay controllers
out of NPN transistors in a Darlington
configuration, and I'm considering using
mosfets instead.
+V
|_
- )|
^ )| relay
|_)|
|
_R_ |/
TTL in -|___|--|
|>
|
GND
(created by AACircuit v1.28 beta 10/06/04 www.tech-chat.de)
My experience with mosfets is zero. Is an
n-channel mosfet pretty much a drop-in
replacement for an NPN device, aside from
gate/base resistor values? If so, how do I
calculate an appropriate value for R on a
mosfet? I'm looking for full-off/full-on
switching, not voltage regulation.
The Mouser website lists the FDN5630 and
FDC655BN, which seem to have the current
capacity (and low price) I want. Are there
any other things I need to consider when
designing for mosfets, aside from ESD?
TIA
out of NPN transistors in a Darlington
configuration, and I'm considering using
mosfets instead.
+V
|_
- )|
^ )| relay
|_)|
|
_R_ |/
TTL in -|___|--|
|>
|
GND
(created by AACircuit v1.28 beta 10/06/04 www.tech-chat.de)
My experience with mosfets is zero. Is an
n-channel mosfet pretty much a drop-in
replacement for an NPN device, aside from
gate/base resistor values? If so, how do I
calculate an appropriate value for R on a
mosfet? I'm looking for full-off/full-on
switching, not voltage regulation.
The Mouser website lists the FDN5630 and
FDC655BN, which seem to have the current
capacity (and low price) I want. Are there
any other things I need to consider when
designing for mosfets, aside from ESD?
TIA