WT431 Просмотр технического описания (PDF) - Weitron Technology
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WT431 Datasheet PDF : 2 Pages
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Adjustable Accurate Reference Source
P b Lead(Pb)-Free
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
The typical value of the equivalent temperature factor in the
whole temperature scope is 50 ppm/℃
The effective temperature compensation in the working
range of full temperature
Low output noise voltage
Fast on -state response
WT431
1.REFERENCE
2.ANODE
3.CATHODE
TO-92
123
ABSOLUTE MAXIMUM RATINGS（Operating temperature range applies unless otherwise specified）
Parameter
SYMBOL
VALUE
UNITS
Cathode Voltage
VKA
37
V
Cathode Current Range (Continuous)
IKA
-100-+150
mA
Reference lnput Current Range
Iref
0.05-+10
mA
Power Dissipation
PD
770
mW
Operating temperature
Topr
0-70
℃
Storage temperature Range
Tstg
-65-+150℃
℃
ELECTRICAL CHARACTERISTICS（Tamb=25℃ unless otherwise specified）
Parameter
Symbol
Test conditions
MIN TYP MAX
Reference lnput Voltage
Deviation of reference input Voltage
Over temperature (note)
Ratio Of Change in Reference lnput
Voltage to the change in Cathode
Voltage
Vref
△Vref/△T
△Vref/△VKA
Reference lnput Current
lref
Deviation Of Reference lnput Current
Over Full Temperature Range
△lref/△T
Minimum cathode current for
regulation
Off-state cathode Current
Dynamic lmpedance
Note:TMIN=0℃ ,TMAX=+70℃
IKA(min)
IKA(OFF)
ZKA
VKA=VREF, IKA=10mA
VKA =VREF, IKA =10mA
Tmin≤Ta≤Tmax
IKA=10mA
△VKA
=10V～VREF
△VKA
=36V～ 10V
IKA= 10mA,R1=10KΩ
R2=∞
lKA=10mA, R1=10KΩ
R2=∞
TA=full Temperature
VKA=VREF
VKA=36V ,VREF=0
VKA=VREF,lKA=1 to 100mA
f≤1.0KHz
2.475 2.5
4.5
2.525
17
-1.0 -2.7
-0.5 -2.0
1.5
4
0.4
1.2
0.45 1.0
0.05 1.0
0.15 0.5
UNIT
V
mV
m V/V
m V/V
μA
μA
mA
μA
Ω
CLASSIFICATION OF Vref
Rank
Range
WT431 (0.5%)
2.487-2.512
WT431A (1.0%)
2.475-2.525
WT431B (2.0%)
2.450-2.550
WEITRON
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http://www.weitron.com.tw
01-Jun-09
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