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TL431 数据表(PDF) 24 Page - Texas Instruments

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部件名 TL431
功能描述  ADJUSTABLE PRECISION SHUNT REGULATORS
PDF  41 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
制造商  TI [Texas Instruments]
网页  http://www.ti.com
标志 TI - Texas Instruments

TL431 数据表(HTML) 24 Page - Texas Instruments

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TL431, TL431A, TL431B
TL432, TL432A, TL432B
ADJUSTABLE PRECISION SHUNT REGULATORS
SLVS543H − AUGUST 2004 − REVISED JANUARY 2005
24
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
APPLICATION INFORMATION
R1
0.1%
R2
0.1%
R
(see Note A)
Vref
VO
TL431
VI(BATT)
RETURN
NOTE A: R should provide cathode current
≥1 mA to the TL431 at minimum VI(BATT).
V
O +
1
) R1
R2
V
ref
Figure 17. Shunt Regulator
VO
TL431
VI(BATT)
VIT ≈ 2.5 V
GND
Input
Von ≈2 V
Voff ≈VI(BATT)
Figure 18. Single-Supply Comparator With Temperature-Compensated Threshold
R
(see Note A)
VO
TL431
VI(BATT)
2N222
2N222
4.7 k
Ω
R1
0.1%
R2
0.1%
0.01
µF
30
Ω
V
O +
1
) R1
R2
V
ref
NOTE A: R should provide cathode current
≥1 mA to the TL431 at minimum VI(BATT).
Figure 19. Precision High-Current Series Regulator



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