AP431A(2007) Ver la hoja de datos (PDF) - Diodes Incorporated.
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AP431A Datasheet PDF : 14 Pages
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Application Examples
AP431/AP431A
ADJUSTABLE PRECISION SHUNT REGULATOR
VIN
V IN
R1B
R1A
R
VIN
RCL I OUT
R2A
R2B
LED on when Low Limit < VIN < High Limit
Low Limit ≈ VREF (1+R1B/R2B)
High Limit ≈ VREF (1+R1A/R2A)
Fig. 4 Voltage
Monitor
V IN
I OUT
V IN
O+
N
OFF
Delay = RC x ln ( V
VIN
-V
)
IN REF
Fig. 5 Delay
Timer
V OUT
R
1
I OUT = V REF / RCL
Fig. 6 Current Limiter or Current
Source
VIN
PULSE
R
1
V OUT
RS
I OUT = V REF / RS
Fig. 7 Constant-Current
Sink
R
2
V OUT = (1 + R1/R2) x VREF
Fig. 8 Higher-Current Shunt
Regulator
VIN
R1A
R1B
+
R2A
R2B
R
2
LIMIT
(1 + R1/R2) x VREF
Fig. 9 Crow Bar
Output ON when
Low Limit <VIN < High Limit
VBE
Low Limit
High Limit
VREF (1 + R1B/R2B) +VBE
VREF (1 + R1A/R2A)
Fig.10 Over-Voltage / Under-Voltage Protection Circuit
AP431/AP431A Rev. 5
10 of 14
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MARCH 2007
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