I'm designing a circuit that drives an LED whose forward bias voltage may vary from 2.8V ~ 3.5V. The supply voltage varies from 2.9V to 4.5V.
Does anyone have any idea on how to design the powerdown circuit in order to avoid silicon breakdown (the breakdown voltage is around 3.6V for my process)?
I'm designing a circuit that drives an LED whose forward bias voltage may vary from 2.8V ~ 3.5V. The supply voltage varies from 2.9V to 4.5V.
Does anyone have any idea on how to design the powerdown circuit in order to avoid silicon breakdown (the breakdown voltage is around 3.6V for my process)?
I'm doing in IC form. I cannot clamp the supply voltage to 3.x volts in normal operation, cos i need to drive the LED whose forward voltage is as large as 3.6V (equal to the silicon breakdown voltage)
I'm doing in IC form. I cannot clamp the supply voltage to 3.x volts in normal operation, cos i need to drive the LED whose forward voltage is as large as 3.6V (equal to the silicon breakdown voltage)