Why would a relay have bias currents such as this:
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Does it have something to do with operating it in open-collector mode?
Thanks,
David.
- posted
16 years ago
relay bias currents
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- posted
16 years ago
Are you asking why it has a BIAS pin or why the current is what is is?
The relay is controlled by a CMOS level. The control input switches current in the BIAS pin to drive an LED (apparently) in the optical isolator. The BIAS input looks like a current sink so is a constant
12ish MA above 5V.Or are you asking something else?