connecting a single chanel driver to an IGBT

crutschow

Joined Mar 14, 2008
30,421
Are you using the IRS211(7,8) or the IRS21171 driver?
The first two require a minimum of 9V logic level to give a high output level.
 

dl324

Joined Mar 30, 2015
14,897
Hi kanoun,

Why don't you just drive the transistor controlling the relay directly from the 555 timer? The timer can sink/source 200mA.
 

Thread Starter

kanoun

Joined Jan 29, 2015
41
Don't understand. The timer would be driving the transistor you're using to switch the inductive load. What needs more current?
one more probleme with the timer I was not able to go further thant 8 V as input ... beyond 7.5 V the signal deasappear ... Very strange but right :(
 

MaxHeadRoom

Joined Jul 18, 2013
25,626
IRS211 single high side driver. Usually intended for high side Mosfet operation.
Your load is shown in the Drain/collector so direct drive from the 555 should be possible.
Max.
 

Thread Starter

kanoun

Joined Jan 29, 2015
41
Yes you are right but I want to use the gate driver because for two reasons
with the 555 the signal deasappear once the Vin is larger than 7.5V
my device needs Ig abaout 1A to swich correctly and the 555 is not able to delivre such a current
 
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