LMP8601MA/NOPB National Semiconductor, LMP8601MA/NOPB Datasheet - Page 18

• Manufacturer Part Number: LMP8601MA/NOPB
• Description: IC AMP CURRENT SENSE 60V 8SOIC
• Manufacturer: National Semiconductor
• Series: LMP®r

Specifications of LMP8601MA/NOPB

• Amplifier Type: Current Sense
• Number Of Circuits: 1
• Slew Rate: 0.83 V/µs
• Gain Bandwidth Product: 60kHz
• Current - Input Bias: 0.04pA
• Voltage - Input Offset: 150µV
• Current - Supply: 1.1mA
• Current - Output / Channel: 48mA
• Voltage - Supply, Single/dual (±): 3 V ~ 5.5 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• No. Of Amplifiers: 1
• Input Bias Current: 20nA
• Input Offset Voltage: 1mV
• Bandwidth: 60kHz
• Cmrr: 90dB
• Supply Voltage Range: 3V To 5.5V
• Supply Current: 1.1mA
• Rohs Compliant: Yes
• Number Of Channels: 1
• Common Mode Rejection Ratio (min): 80 dB
• Available Set Gain: 26.06 dB
• Operating Supply Voltage: 5 V
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 40 C
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 3 V
• For Use With: LMP8601MAEVAL - BOARD EVALUATION FOR LMP8601MA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Output Type: -
• -3db Bandwidth: -
• Lead Free Status / Rohs Status: Details
• Other names: *LM8601MA/NOPB; LMP8601MA

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BATTERY CURRENT MONITOR APPLICATION
This application example shows how the LMP8601/LM-
P8601Q can be used to monitor the current flowing in and out
a battery pack. The fact that the LMP8601/LMP8601Q can
measure small voltages at a high offset voltage outside the
parts own supply range makes this part a very good choice
ADVANCED BATTERY CHARGER APPLICATION
The above circuit can be used to realize an advanced battery
charger that has the capability to monitor the exact net current
that flows in and out the battery as show in
output signal of the LMP8601/LMP8601Q is digitized with the
FIGURE 11. Battery Current Monitor Application
Figure
12. The
K2 = 2
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for such applications. If the load current of the battery is higher
then the charging current, the output voltage of the LMP8601/
LMP8601Q will be above the “half offset voltage” for a net
current flowing out of the battery. When the charging current
is higher then the load current the output will be below this
“half offset voltage”.
A/D converter and used as an input for the charge controller.
The Charge controller can me used to regulate the charger
circuit to deliver exactly the current that is required by the load,
avoiding overcharging a fully loaded battery
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