ltc4151 Linear Technology Corporation, ltc4151 Datasheet - Page 13

• Manufacturer Part Number: ltc4151
• Description: High Voltage I2c Current And Voltage Monitor
• Manufacturer: Linear Technology Corporation

APPLICATIONS INFORMATION
and each of the following (if more) data bytes, as in a
Read Page command, the LTC4151/LTC4151-1 will keep
sending out each data byte in the register that corresponds
to the incrementing register pointer. The read operation
terminates and the register address pointer resets to 00h
when the master sends a Stop condition.
Layout Considerations
A Kelvin connection between the sense resistor R
the LTC4151/LTC4151-1 is recommended to achieve ac-
curate current sensing (Figure 10). The minimum trace
width for 1oz copper foil is 0.02" per amp to make sure
the trace stays at a reasonable temperature. Using 0.03"
per amp or wider is recommended. Note that 1oz copper
exhibits a sheet resistance of about 530μΩ per square.
TYPICAL APPLICATION
V
VISHAY
2381 615 4.104
IN
Temperature Monitoring with an NTC Thermistor While
Measuring Load Current and LTC4151 Supply Current
T(°C) = 58.82 × (N
N
ADIN and V
ADIN
40.2k
1%
1.5k
1%
100k AT 25°C
1%
and N
IN
VIN
pins, respectively.
are digital codes measured by the ADC at the
S
ADIN
and
ADIN
/N
SENSE
VIN
0.2Ω
+
– 0.1066), 20°C < T < 60°C.
LTC4151
SENSE
GND
V
GND
IN
Figure 10. Recommended Layout for Kelvin Connection
–
V
IN
ADR1
ADR0
41511 TA02
SDA
SCL
LTC4151/LTC4151-1
I
2
C
SENSE
V
ADR1
ADR0
IN
+
250mA
LOAD
LTC4151
R
S
SENSE
GND
–
I
I
13
LOAD
LOAD
41511 F10
41511f