TL1431-SP Datasheet, PDF (9/13 Pages) Texas Instruments – CLASS V, PRECISION PROGRAMMABLE REFERENCE

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V_(BATT)
R1A
TL1431
R2A
R3
R1B
R4
TL1431
R2B
ǒ Ǔ Low Limit +
1
)
R1B
R2B
VI(ref)
ǒ Ǔ High Limit +
1
)
R1A
R2A
VI(ref)
LED on When
Low Limit < V_(BATT) < High Limit
Figure 25. Voltage Monitor
V_(BATT)
R1
R_CL 0.1%
I_O
12 V
R
On
Off
TL1431-SP
680 Ω
SLVSB44 – JULY 2012
2 kΩ
TL1431
C
Delay + R
C
II
(12
12 V
V) * VI(ref)
Figure 26. Delay Timer
V_(BATT)
I_O
TL1431
IO
+
VI(ref)
RCL
)
IKA
ǒ Ǔ ^{R1 +}
V(BATT)
IO
hFE
) IKA
Figure 27. Precision Current Limiter
TL1431
R_S
0.1%
IO
+
VI(ref)
RS
Figure 28. Precision Constant-Current Sink
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