ICE3A1065LJ Datasheet, PDF (15/26 Pages) Infineon Technologies AG – Power Management Supply

to charge the capacitor C_BK from 0.9V to 4.0V after the
switch S1 is released. The charging time from 0.9V to
4.0V are the extendable blanking time. If C_BK is 0.22uF
and I_BK is 8.4uA, the extendable blanking time is
around 80ms and the total blanking time is 100ms. In
combining the FB and blanking time, there is a blanking
window generated which prevents the system to enter
Auto Restart Mode due to large load jumps.
In case of VCC undervoltage, the IC enters into the
Auto Restart Mode and starts a new startup cycle.
Short Optocoupler also leads to VCC undervoltage as
there is no self supply after activating the internal
reference and bias.
In contrast to the Latched Off Mode, there is always a
Startup Phase with switching cycles in Auto Restart
Mode. After this Start Up Phase, the conditions are
again checked whether the failure mode is still present.
Normal operation is resumed once the failure mode is
removed that had caused the Auto Restart Mode.
CoolSET™-F3
ICE3A1065LJ
Functional Description
Version 2.4
15
19 Nov 2012