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TL431MFKB Datasheet(PDF) 28 Page - Texas Instruments

Part # TL431MFKB
Description  Precision Programmable Reference
PDF  74 Pages
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

TL431MFKB Datasheet(HTML) 28 Page - Texas Instruments

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TL431
IO
RCL
0.1%
R1
VI(BATT)
Iout
V
ref
R
CL
I
KA
R1
V
I(BATT)
I
O
h
FE
I
KA
+
+
=
=
TL431
650 Ω
2 kΩ
C
On
Off
R
12 V
n
ref
12 V
Delay = R × C × I
12 V – V
æ
ö
ç
÷
ç
÷
è
ø
TL431
VI(BATT)
R3
(see Note A)
R1A
R4
(see Note A)
R2B
R2A
R1B
Low Limit = 1 + R1B
R2B
V
ref
High Limit = 1 + R1A
R2A
V
ref
LED on When Low Limit < VI(BATT) < High Limit
TL431, TL431A, TL431B
TL432, TL432A, TL432B
SLVS543O – AUGUST 2004 – REVISED JANUARY 2015
www.ti.com
System Examples (continued)
A.
Select R3 and R4 to provide the desired LED intensity and cathode current
≥1 mA to the TL431 at the available
VI(BATT).
Figure 36. Voltage Monitor
Figure 37. Delay Timer
Figure 38. Precision Current Limiter
28
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Copyright © 2004–2015, Texas Instruments Incorporated
Product Folder Links: TL431 TL431A TL431B TL432 TL432A TL432B



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