CP432
Adjustable Precision Shunt Regulator
Application Examples
V
IN
R
CL
R
R1A
R1B
V
IN
I
OUT
V
IN
ON
R2A
R2B
OFF
+
LED on when Low Limit
＜
V
IN
＜
High Limit
Low Limit
≈
V
REF
(1+R1B/R2B)
High Limit
≈
V
REF
(1+R1A/R2A)
V
IN
Delay = RC x ln(
)
V
IN
-V
REF
I
OUT
= V
REF
/ R
CL
Fig.4 Voltage Monitor
Fig.5 Delay Timer
Fig.6 Current Limiter or Current Source
V
IN
I
OUT
V
IN
V
OUT
V
IN
PUSE
R1
V
OUT
R1
R
S
R2
R2
I
OUT
= V
REF
/ R
S
V
OUT
= (1 + R1/R2)
×
V
REF
L
IMIT
(1 + R1/R2)
×
V
REF
Fig.7 Constant-Current Sink
Fig.8 Higher-Current Shunt Regulator
Fig.9 Crow Bar
V
IN
R1A
R1B
Output ON when
Low Limint
＜
V
IN
＜
High Limit
+
R2A
R2B
V
BE
Low Limit
High Limit
V
REF
(1 + R1B/R2B) +V
BE
V
REF
(1 + R1A/R2A)
Fig.10 Over-Voltage / Under-Voltage Protection Circuit
* All specs and applications shown above subject to change without prior notice.
1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN
Email: server@ceramate.com.tw
Tel:886-3-3214525
Http: www.ceramate.com.tw
Page 6 of 10
Rev 1.1 Jan. 19,2005
Fax:886-3-3521052
CERAMATE [ CERAMATE TECHNICAL ]
