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| SPX1431 Datasheet, PDF (6/12 Pages) Sipex Corporation – Precision Adjustable Shunt Regulator | |||
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TYPICAL PERFORMANCE CHARACTERISTICS (continued)
150 â¦
IK
R
CL
10kâ¦
100
10
TA = 25 °C
IK =1mA to 100mA
1.0
0.1
Figure 17. Test Circuit for Stability
100
10
VKA = 36V
VREF = 0V
1
0.1
0.01
-50
0
50
100
150
TA Ambient Temperature (°C)
Figure 19. Off State Leakage
0.01
1K
10K
100K
1M
10M
f - Frequency (Hz)
Figure 18. Dynamic Output Impedance TA = 25°C,
IK = 1 to 100mA
VIN
R3
VOUT
R1
0.1%
VREF
R2
0.1%
SPX1431
Figure 20. Shunt Regulator VOUT = (1+R1/R2)VREF
VIN
R2
ISINK
Q1
SPX1431
R1
0.1%
Figure 21. Constant Current, Sink, ISINK = VREF/R1
VOUT
R3
Opto Isolator
Isolated
Feedback
R1
0.1%
R3 sets feedback gain,
C1 provides feedback
compensation
+
C2
C1
SPX1431
VOUTRTN
R2
0.1%
Figure 22. Reference Amplifier for Isolated Feedback in
Off-Line DC-DC Converters
Rev. 08/13/02
SPX1431 Precision Adjustable Shunt Regulator
6
© Copyright 2002 Sipex Corporation
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