IR3725MPBF International Rectifier, IR3725MPBF Datasheet - Page 9
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IR3725MPBF
Manufacturer Part Number
IR3725MPBF
Description
Input Power Monitor IC with Digital Interface
Manufacturer
International Rectifier
Datasheet
1.IR3725MPBF.pdf
(19 pages)
Specifications of IR3725MPBF
Package
12 Lead DFN
Bias Supply Voltage
+3.3V +/-5%
Junction Temperature
0oC to 125oC
Pbf
Yes
RESISTOR CURRENT SENSING APPLICATION
The voltage on the shunt resistor of the circuit below
is directly proportional to the current from the source.
Shunts developing 5 mV to 75 mV at I
used. Accuracy is enhanced at the higher voltage.
Select R
tolerance resistor. Sinking current capability of VCS1
or VCS2 is V
Page 9 of 19
T
to be a 25.5 kΩ 1% or better initial
IG
12 V Power
VDD
/ R
Source
T
.
VDD
Bypass
Cap
R
T
FS
have been
VT
Figure 2 Resistor Sensing Circuit
www.irf.com
VDD
R
CS1
IR3725
Chose R
either of them develops the same voltage that is
developed by the shunt at full scale current.
C
ceramic dielectric with a value between 0.1 μF and
10 μF.
CS2
VCS1
GND
is the integrator capacitor and should have a
SHUNT
C
CS2
CS1
and R
VCS2
R
CS2
CS2
SDA
SCL
VO
ALERT#
ADDR
such that this current through
IR3725
Data Sheet
2011_11_16