6

Date: 1/19/05

SPX2431 Precision Adjustable Shunt Regulator

© Copyright 2005 Sipex Corporation

TYPICAL PERFORMANCE CHARACTERISTICS

Figure 17. Test Circuit for Stability

Figure 18. Dynamic Output Impedance T

I

Figure 19. Off State Leakage

Figure 20. Shunt Regulator V

150

Ω

10k

Ω

I

K

C

L

R

0.01

0.1

1

10

100

-50

0

50

100

150

1K

10K

100K

1M

10M

100

10

1.0

0.1

0.01

f Frecuency (Hz)

R2

0.1%

R3

R1

0.1%

SPX2431

Figure 21. Constant Current, Sink, I

Figure 22. Reference Amplifier for Isolated Feedback in

Off-Line DC-DC Converters

Q1

R2

R1

0.1%

SPX2431

R2

0.1%

R3

R1

0.1%

SPX2431

C2

C1

Isolated

Feedback

+

R3 sets feedback gain,

C1 provides feedback

compensation

Opto Isolator