Epson LQ-510 - Tl431 Clpb (6 B

APPENDIX
REV.-A
A.1.1.7 TL431CLPB (6B)
The TL431 is a high-accuracy, temperature-compensated shunt regulator. The output voltage can be set
anywhere between 2.5 V and 36 V through addition of two external resistors. The TL431 is highly stable
and outputs a large current, so that it is capable of replacing various Zener diodes. The TL431 is especially
suitable for driving the photodiode in the photocoupler section of the feedback circuit used in the RCC system
switching regulator.
0 Temperature-compensated reference voltage (50 ppm C typical)
0 High response speed
0 Low noise
r1
I 1
CATHODE
LJ
ri
cl
I I
ANODE
LJ
ri
I I
REF
LJ
REF NC A NC
K SC SC SC
Figure A-16. TL431CLPB Pin Diagram
VW
i!z
Cathode
hOdO
Figure A-17. TL431CLPB Internal Circuit
A-14
LQ-510