Tl431Clpb Shunt Regulator - Epson LQ-1050 Technical Manual

Board)
high accuracy temperature compensated shunt regulator. The output voltage can be
The TL431 is a
changed between 2.5 to 36V by adding two external resistors. The TL43 1 has high stability and outputs
a large current so that it can replace various zener diodes.
Features
Temperature compensated reference voltage (50 PPM/C )
. Low zener current (400LLA )
High response speed
Low dynamic output impedance
. Low noise
Output Voltage Vo Setting
Setting range . . . Vref to 36V
Vo = Vref X (1 + R1/R2)
' V7ef: = 2.5V
Fig. A-28. TL431 CLPB Pin Diagram and Output Voltage Setting
CATHODE
ANODE
J
R
VIN
1
K
2
NC
NC
NC
R
I
R2
A-27
8
7 NC
6 A
5 NC
Circuit