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TL431K Schematic ( Datenblatt PDF ) - Kexin

Teilenummer TL431K
Beschreibung Adjustable Accurate Reference Source
Hersteller Kexin
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TL431K Datasheet, Funktion
SMD Type
Adjustable Accurate Reference Source
TL431K (KL431K)
IC
Features
The output voltage can be adjusted to 36V
Low dynamic output impedance, its typical value is 0.2Ω
Trapping current capability is 1 to 100mA
Low output noise voltage
Fast on -state response
CATHODE
ANODE
ANODE
NC
1
2
3
4
8 REF
7 ANODE
6 ANODE
5 NC
NC No internal connection
Absolute Maximum Ratings Ta = 25
Parameter
Cathode Voltage
Cathode Current Range(Continuous)
Reference Input Current Range
Maximum Power Dissipation
Thermal Resistance from Juntion to Ambient
Operating Junction Temperature
Operating Junction Temperature Range
Storage Temperature Range
Symbol
VKA
IKA
Iref
PD
RθJA
Tj
Topr
Tstg
SOP-8
Rating
37
-100~+150
0.05~+10
400
270
150
0 ~ 70
-65 ~ 150
1.50 0.15
1 CATHODE
2 ANODE
3 ANODE
4 NC
5 NC
6 ANODE
7 ANODE
8 REF
Unit
V
mA
mW
/W
Electrical Characteristics Ta = 25℃(unless otherwise specified
Parameter
Symbol
Test Conditions
Min Typ Max Unit
VKA=VREF,IKA=10mA
2.445
2.545
Reference Input Voltage(Fig.1)
Vref
RanK
0.5%
1%
2.482 2.495 2.508
2.47 2.52
V
Deviation of Reference Input Voltage Over
Temperature(Fig.1) Tmin=0,Tmax=+70
VKA=VREF,IKA=10mA
Vref/T
TminTaTmax
4.5 17 mV
Ratio Of Change in Reference lnput Voltage
to the Change in Cathode Voltage (Fig.2)
Vref/VKA IKA=10mA
VKA=VREF ~ 10V
VKA=10V ~ 36V
-1.0 -2.7
mV/V
-0.5 -2.0
Reference Input Current
Iref IKA=10mA,R1=10 kΩ,R2=
1.5 4
Deviation Of Reference Input Current
Over Full Temperature Range(Fig.2)
Iref / T
IKA=10mA,R1=10 kΩ,R2=
Ta=full Temperature
uA
0.4 1.2
Minmum Cathode Current for Regulation(Fig.1) IKA(min) VKA=VREF
0.45 1.0 mA
Off-state Cathode Current(Fig.3)
IKA(OFF) VKA=40V, VREF=0
0.05 0.5 uA
Dynamic Impedance
ZKA VKA=VREF, IKA=1 to 100mA,f1.0KHz
0.15 0.5 Ω
Marking
Marking
431
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