TL431A3 データシートの表示（PDF） - Cystech Electonics Corp.
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TL431A3 Datasheet PDF : 6 Pages
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CYStech Electronics Corp.
Spec. No. : C502A3
Issued Date : 2003.03.26
Revised Date : 2008.10.09
Page No. : 2/6
Functional Block Diagram & Symbol
Functional Block Diagram :
Cathode
Reference
+
-
VREF
Anode
Symbol :
Cathode
Reference
Anode
Test Circuits
II
II
IN
VZ
IN
VZ
IN
VZ
IREF
IZ
VREF
R1 IREF
IZ
R2 VREF
Fig1. Test Circuit for VZ=VREF
Fig 2. Test Circuit for VZ>VREF
Fig3. Test Circuit for Off-State
Note : VZ=VREF(1+R1/R2)+IREFxR1
Current
Electrical Characteristics ( Ta=25°C unless otherwise specified )
Characteristics
Symbol Test Conditions Min Typ Max Unit
Reference Input Voltage TL431A
2.480 2.495 2.510
TL431B
VREF VKA=VREF, IK=10mA 2.470 2.495 2.520 V
TL431C
2.445 2.495 2.545
Deviation of Reference Input Voltage
Over-Temperature
VREF(dev)
VKA=VREF, IK=10mA
Tmin≤Ta≤Tmax
-
4 17 mV
Ratio of Change in Reference Input
Voltage to the Change in Cathode
Voltage
ΔVREF /
ΔVKA
IK=10mA,
ΔVKA=10V-VREF
IK=10mA,
ΔKKA=36V-10V
- -1.4 -2.7 mV
- -1.0 -2.0 V
Reference Input Current
IREF
IK=10mA, R1=10kΩ,
R2=∞
-
2
4 μA
Deviation of Reference Input Current
Over Full Temperature Range
IREF(dev)
IK=10mA, R1=10kΩ,
R2=∞, Ta=Full Range
-
0.4 1.2 μA
Minimum Cathode Current for
Regulation
IK(min) VKA=VREF
- 0.4 1.0 mA
Off-State Cathode Current
IK(off) VKA=36V, VREF=0
- 0.1 1.0 μA
Dynamic impedance
ZKA
VKA=VREF, f≤1.0KHz
IK=1 to 100mA
-
0.2 0.5 Ω
TL431A3
CYStek Product Specification
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