VIPer12ADIP / VIPer12AS
Figure 4 : Peak Drain Current Vs. Feedback Current
100V
I
D
4mH
I
Dpeak
1/F
OSC
VDD
DRAIN
t
FB
CONTROL
18V
100V
SOURCE
I
47nF
FB
VIPer12A
V
FB
I
R
FBsd FB
The drain current limitation is
obtained for VFB = 0 V, and a
negative current is drawn from
the FB pin. See the Application
section for further details.
I
FB
I
Dpeak
∆I
Dpeak
I
G
= – ----------------------
Dlim
ID
∆I
FB
I
FB
0
I
FBsd
Figure 5 : Thermal Shutdown
T
j
T
SD
T
HYST
t
V
DD
V
Automatic
start up
DDon
t
6/15