AP432 Advanced Power Electronics Corp., AP432 Datasheet - Page 6

• Manufacturer Part Number: AP432
• Manufacturer: Advanced Power Electronics Corp.

Specifications of AP432

• Vref: 1.24
• Cathode Voltage: 20
• Continuous Cathode Current: 250
• Accuracy: 0.5%, 1%
• Minimum Cathode Current For Regulation Typ.: 0.15
• Package: SOP8,SOT89,TO92,SOT23,SOT23-5

Adjustable Precision Shunt Regulator
Advanced Power Electronics Corp.
www.a-power.com.tw
Application Examples
V
Fig.7 Constant-Current Sink
IN
V
IN
LED on when Low Limit ＜ V
Low Limit ≈ V
High Limit ≈ V
R1A
R2A
Advanced Power
Electronics Corp.
Fig.4 Voltage Monitor
I
OUT
= V
REF
REF
REF
(1+R1B/R2B)
(1+R1A/R2A)
/ R
R1B
S
R2B
I
OUT
R
IN
S
＜ High Limit
V
IN
V
R1A
R2A
Fig.10 Over-Voltage / Under-Voltage Protection Circuit
IN
Fig.8 Higher-Current Shunt Regulator
High Limit
Low Limit
R1
R2
V
Delay = RC x ln(
V
R1B
OFF
OUT
IN
Fig.5 Delay Timer
= (1 + R1/R2) ×V
V
V
REF
REF
R2B
ON
R
(1 + R1A/R2A)
(1 + R1B/R2B) +V
+
V
IN
REF
+
V
-V
IN
REF
V
BE
OUT
)
V
Fig.6 Current Limiter or Current Source
Low Limint ＜V
V
IN
V
BE
IN
Output ON when
PUSE
R1
R2
L
IN
I
IMIT
OUT
Fig.9 Crow Bar
＜High Limit
= V
(1 + R1/R2) ×V
REF
/ R
CL
R
AP432
CL
REF
I
OUT
V
OUT
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