Simple Circuit Ideas - Power integrations InnoSwitch3 Application Note

Application Note

Simple Circuit Ideas

Line OV Only
Diode biased from BPP and provides
constant current into the VOLTAGE pin via
R2 above I threshold, thus disabling UV
UV
function of the IC.
Line UV Only
Zener clamps the voltage on R1-R2 node
and provides constant voltage above I
thresholds, thus disabling OV function of
the IC.
Fast AC Reset for IC with OV Latch
Function
Diode allows VOLTAGE pin to monitor line
voltage for OV/UV detection. A capacitor is
sized to filter the line ripple. C
S
small to allow the VOLTAGE pin to
discharge fast enough to go below the
I threshold in order to reset the latch.
UV-
Figure 25. Circuit Ideas to Enhance Design.
30
Rev. A 10/18
UV
must be
+
R1
1N4148
R2
D V
S BPP
InnoSwitch3-CE
+
R1
R2
D V
6.2 V
S BPP
InnoSwitch3-CE
Diode
D
Cap
C
S
100 nF
S
VOUT
IS
PI-8403-081617
VOUT
IS
PI-8404-081617
R2
V
BPP IS
InnoSwitch3
PI-8468-100417
www.power.com
AN-72
VOUT