Advanced Power
Electronics Corp.
PULSE RESPONSE
6
T
A
=25
o
C
AP431A
5
Input and Output Voltage-V
Input
220Ω
Output
4
Pulse
Generator
f=100kHz
50Ω
3
Output
GND
2
TEST CIRCUIT FOR PULSE RESPONSE
1
0
-1
0
1
2
3
t-Time-µ S
4
5
6
7
STABILITY BOUNDARY CONDITIONS
†
100
90
80
A V
KA
=V
ref
B V
KA
=5V
C V
KA
=10V
D V
KA
=15V
B
Stable
TA=25
o
C
150Ω
I KA
C
L
+
-
V
BATT
I
KA
-Cathode Current-mA
70
60
50
40
30
20
10
0
0.001
0.01
0.1
1
C
L
-Load Capacitance-µF
D
Stable
A
C
TEST CIRCUIT FOR CURVE A
I KA
R1=10KΩ
C
L
R2
+
-
150Ω
10
V
BATT
The areas under the curves represent conditions that may cause the
device to oscillate. For curves B, C, and D, R2 and V+ were adjusted
to establish the initial V
KA
and I
KA
conditions with C
L
=0.V
BATT
and
C
L
were then adjusted to determine the ranges of stability.
TEST CIRCUIT FOR CURVE B, C, AND D
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7
A-POWER [ ADVANCED POWER ELECTRONICS CORP. ]
