SPX431LCM1 SIPEX [Sipex Corporation], SPX431LCM1 Datasheet - Page 7

• Manufacturer Part Number: SPX431LCM1
• Description: Precision Adjustable Shunt Regulator
• Manufacturer: SIPEX [Sipex Corporation]

Date: 5/25/04
Figure 21. Constant Current Sink, I
Figure 23. Precision High Current Series Regulator
V
Figure 25. Single Supply Comparator with Temperature
Compensated Threshold. V
SPX431L
OUT
V
IN
V
= (1+R1/R2)V
IN
SPX431L
R5
R1
SPX431L
V
REF
IN
R4
R2
C1
V
R2
0.1%
IN
0.1%
CC
R1
threshold = 2.5V.
R2
R3
SINK
SPX431L Precision Adjustable Shunt Regulator
= V
R1
0.1%
I
SINK
Q1
REF
V
/R1
OUT
V
OUT
TYPICAL PERFORMANCE CHARACTERISTICS
7
Figure 24. High Current Shunt regulator
V
* Resistor values are chosen such that the effect to
I
Figure 22. Reference Amplifier for Isolated Feedback in
Off-Line DC-DC Converters
REF
V
OUT
Feedback
IN
Isolated
is negligible .
= (1+R1/R2)V
Opto Isolator
R2
0.1%
R1
0.1%
C2
SPX431L
+
V
REF
OUT
SPX431L
R3
© Copyright 2004 Sipex Corporation5
V
OUT
C1
RTN
R3
R1
0.1%
R2
0.1%
R3 sets feedback gain,
C1 provides feedback
compensation
Q1
V
OUT