ꢀ ꢁ ꢂ ꢃꢄ ꢅ ꢀ ꢁ ꢂ ꢃꢄ ꢆꢅ ꢀꢁ ꢂ ꢃ ꢄꢇ ꢅ ꢀꢁ ꢂ ꢃ ꢈꢅ ꢀꢁ ꢂ ꢃ ꢈꢆꢅ ꢀ ꢁꢂ ꢃ ꢈ ꢇ
ꢆ ꢉꢊꢋ ꢌꢀꢆ ꢇ ꢁꢍ ꢎ ꢏꢍ ꢐꢑ ꢌꢑ ꢒ ꢓ ꢌ ꢔꢋꢓ ꢀ ꢏꢍ ꢕ ꢋꢁ ꢆꢀꢒ ꢏꢌ
SLVS543A – AUGUST 2004 − REVISED AUGUST 2004
APPLICATION INFORMATION
V
I(BATT)
IN
OUT
V
O
uA7805
Common
TL431
R1
R2
R1
+ ǒ1 )
Ǔ
Vref
V
O
Minimum V + Vref ) 5 V
O
R2
Figure 20. Output Control of a Three-Terminal Fixed Regulator
V
V
O
I(BATT)
R1
R1
R2
+ ǒ1 )
Ǔ
Vref
V
O
TL431
R2
Figure 21. High-Current Shunt Regulator
V
V
O
I(BATT)
R1
TL431
C
(see Note A)
R2
NOTE A: Refer to the stability boundary conditions in Figure 16 to determine allowable values for C.
Figure 22. Crowbar Circuit
24
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