Control Protectionusing PSpice

1. Control Protection
using PSpice
Tsuyoshi Horigome

2. R1
100k
7
R2
40k
5
0
0
1
+
-
U1
COMP_S
IN+
IN-
OUT+
OUT-
E1
IF( V(N1)>800m, 1.2286, 1.201 )
EVALUE
0
N2
U2
AND
Q
R
Q
S
U3
FFLOP
V1
TD = 0
TF = 1
PW = 1n
PER = 2
V1 = 0
TR = 1
V2 = 5
N1
+
-
U4
ERRAMP
ref1
IN-
OUT+
OUT-
IN+
G1
Limit(V(%IN+, %IN-)/100, 0, 1.2u)
GVALUE
V2
1.235
0
V
V
V V
V
V
Q1
QN
0
C1
0.1u
IC = 0
0
ref1
ref1

3. Time
0s 0.5s 1.0s 1.5s 2.0s
V(U1:3) V(5)
0V
4.0V
V(U2:3) V(U2:1)
0V
2.5V
5.0V
V(N2)
0V
500mV
V(1) 1.235
0
1.0
2.0
SEL>>
V(N1)
0V
4.0V