Diodes AP431_A - Manual (Page 8)

AP431/AP431A
Document number: DS31002 Rev. 21 - 2
8 of 17
www.diodes.com
June 2013
© Diodes Incorporated
AP431/AP431A
Typical Performance Characteristics
(cont.)
-1 0 1 2 3 4 5 6 7
t- TIME ( s)
Pulse Response

0
1
2
3
4
5
6
IN
P
U
T
a
nd
O
UT
PUT
V
O
LTA
G
E (
V
)
T = 25°C
A
Input
Output
220

50

Output
GND
Test Circuit for Pulse Response
Pulse
Generator
f = 100kHz
Stable
Stable B
A
C
D
T = 25 C
A
 A V = V
B
KA REF
V = 5V
C V = 10V
D V = 15V
KA
KA
KA
C - LOAD CAPACITANCE ( F)
Stability Boundary Conditions
L

†
0.001 0.01 0.1 1 10
100
90
80
70
60
50
40
30
10
0
20 I-
C
A
T
H
O
DE
C
U
R
R
EN
T
(mA
)
KA
†
The areas under the curves represent conditions that may cause
the device to oscilate. 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.
150

V
BATT C
L
I
KA
Test Circuit for Curve A
+
-
V
BATT
150 
R1 = 10K

R2
C
L
I
KA
+
-
Test Circuit for Curve B, C, and D