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AP431 Datenblatt(PDF) 9 Page - Diodes Incorporated

Teilenummer AP431
Bauteilbeschribung  ADJUSTABLE PRECISION SHUNT REGULATOR
PDF  16 Pages
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Hersteller  DIODES [Diodes Incorporated]
Direct Link  http://www.diodes.com
Logo DIODES - Diodes Incorporated

AP431 Datenblatt(HTML) 9 Page - Diodes Incorporated

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AP431/AP431A
ADJUSTABLE PRECISION SHUNT REGULATOR
AP431/AP431A
Document number: DS31002 Rev. 15 - 2
9 of 16
www.diodes.com
June 2010
© Diodes Incorporated
Application Examples
VIN
+
Low Limit
V
REF (1 + R1B/R2B) +VBE
High Limit
V
REF (1 + R1A/R2A)
R1A
R1B
R2A
R2B
VBE
Output ON when
Low Limit <
< High Limit
Fig.10 Over-Voltage / Under-Voltage Protection Circuit
V
IN
R
CL
I
OUT
I
OUT = V REF / RCL
Fig. 6 Current Limiter or Current
Source
IOUT
VIN
I
OUT = V REF / RS
RS
Fig. 7 Constant-Current
Sink
Fig. 4 Voltage
Monitor
Fig. 5 Delay
Timer
V
OUT = (1 + R1/R2) x VREF
V
IN
R
1
R
2
Fig. 8 Higher-Current Shunt
Regulator
V
OUT
V
IN
PULSE
R
1
R
2
LIMIT
(1 + R1/R2) x VREF
Fig. 9 Crow Bar
V
OUT
VIN
O
N
OFF
R
+
V
IN
Delay = RC x ln (
V
IN
-V
REF
)
LED on when Low Limit < V
IN
High Limit
Low Limit ≈ V
REF (1+R1B/R2B)
High Limit ≈ V
REF (1+R1A/R2A)
R1A
R2A
VIN
R1B
R2B
<
VIN



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