CP432
Adjustable Precision Shunt Regulator
ꢀApplication Examples
V
IN
VIN
I
OUT
RCL
R
VIN
R1B
R1A
+
ON
R2A
R2B
OFF
VIN
Delay =
)
RC x ln(
IOUT = VREF / RCL
LED on when Low Limit VIN High Limit
V
IN -VREF
＜
＜
≈
Low Limit VREF (1+R1B/R2B)
≈
High Limit VREF (1+R1A/R2A)
Fig.5 Delay Timer
Fig.4 Voltage Monitor
Fig.6 Current Limiter or Current Source
V
IN
IOUT
VIN
VOUT
V
IN
VOUT
PUSE
R1
R1
R2
R2
V
RS
×
L
IMIT
(1 + R1/R2)
VREF
×
OUT = (1 + R1/R2)
V
REF
I
OUT = VREF / RS
Fig.7 Constant-Current Sink
Fig.8 Higher-Current Shunt Regulator
Fig.9 Crow Bar
VIN
R1A
R2A
R1B
Output ON when
＜
＜
Low Limint
V
IN High Limit
+
V
BE
R2B
Low Limit
High Limit
V
V
REF(1 + R1B/R2B) +VBE
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
Tel:886-3-3214525
Email: server@ceramate.com.tw
Http: www.ceramate.com.tw
Rev 1.1 Jan. 19,2005
Page 6 of 10
Fax:886-3-3521052
CERAMATE [ CERAMATE TECHNICAL ]
