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TL431-Q1 View Datasheet(PDF) - Texas Instruments

Part NameDescriptionManufacturer
TL431-Q1 ADJUSTABLE PRECISION SHUNT REGULATOR TI
Texas Instruments TI
TL431-Q1 Datasheet PDF : 23 Pages
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TL431-Q1
ADJUSTABLE PRECISION SHUNT REGULATOR
SGLS302C − MARCH 2005 − REVISED APRIL 2008
APPLICATION INFORMATION
R
(see Note A)
VI(BATT)
R1
0.1%
Vref
R2
0.1%
VO
TL431
ǒ Ǔ VO +
1
)
R1
R2
Vref
RETURN
NOTE A: R should provide cathode current 1 mA to the TL431 at minimum VI(BATT).
Figure 17. Shunt Regulator
VI(BATT)
TL431
Input
VIT 2.5 V
VO
Von 2 V
Voff VI(BATT)
GND
Figure 18. Single-Supply Comparator With Temperature-Compensated Threshold
VI(BATT)
TL431
R
(see Note A)
2N222
30
0.01 µF
R2
0.1%
R1
0.1%
4.7 k
2N222
ǒ Ǔ VO +
1
)
R1
R2
Vref
VO
NOTE A: R should provide cathode current 1 mA to the TL431 at minimum VI(BATT).
Figure 19. Precision High-Current Series Regulator
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
13
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