Datasheet

STABILITY BOUNDARY CONDITIONS
50
40
10
0
0.001 0.01 0.1 1
70
90
100
10
30
80
60
20
TEST CIRCUIT FOR CURVE A
TEST CIRCUIT FOR CURVES B, C, AND D
C
L
− Load Capacitance − µF
A-V
KA
= V
I(ref)
B-V
KA
= 5 V
C-V
KA
= 10 V
D-V
KA
= 15 V
Stable
Stable
A
B
C
D
I
KA
= 10 mA
T
A
= 25°C
C
L
C
L
150 W
150 W
I
KA
I
KA
V
BATT
V
BATT
R1 =
10 kW
R2
+
−
+
−
V
I
V
I
− Cathode Current − mA
I
KA
3
2
1
0
0 1 2 3 4
4
5
PULSE RESPONSE
6
5 6 7
TEST CIRCUIT FOR PULSE RESPONSE
T
A
= 25°C
Input
Output
Input and Output V
oltages − V
t − Time − µs
Pulse
Generator
f = 100 kHz
50 W
220
W
Output
GND
V
I
TL1431
www.ti.com SLVS062M –DECEMBER 1991–REVISED APRIL 2012
Figure 14.
A. The areas under the curves represent conditions that may cause the device to oscillate. For curves B, C, and D, R2,
and V+ are adjusted to establish the initial V
KA
and I
KA
conditions, with C
L
= 0. V
BATT
and C
L
then are adjusted to
determine the ranges of stability.
Figure 15.
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