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TL431LI Datasheet(Fiches technique) 22 Page - Texas Instruments

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Numéro de pièce TL431LI
Description  Programmable Shunt Regulator with Optimized Reference Current
Télécharger  32 Pages
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Fabricant  TI1 [Texas Instruments]
Site Internet  http://www.ti.com
Logo 

 22 page
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TL43xLIx
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
Copyright © 2017, Texas Instruments Incorporated
TL43xLIx
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
Copyright © 2017, Texas Instruments Incorporated
TL43xLIx
12 V
VCC
5 V
6.8 kΩ
10 kΩ
10 kΩ
0.1%
10 kΩ
0.1%
X
Not
Used
Feedback
TL598
+
Copyright © 2017, Texas Instruments Incorporated
22
TL431LI
TL432LI
SLVSDQ6 – JULY 2018
www.ti.com
Product Folder Links: TL431LI TL432LI
Submit Documentation Feedback
Copyright © 2018, Texas Instruments Incorporated
System Examples (continued)
Figure 31. PWM Converter With Reference
A.
Select R3 and R4 to provide the desired LED intensity and cathode current
≥1 mA to the TL431LI at the available
VI(BATT).
Figure 32. Voltage Monitor
Figure 33. Delay Timer




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