MAX4376 Datasheet, PDF (8/9 Pages) Maxim Integrated Products – Single/Dual/Quad High-Side Current-Sense Amplifiers with Internal Gain

Single/Dual/Quad, High-Side Current-Sense
Amplifiers with Internal Gain
Table 1. Recommended Component Values
FULL-SCALE LOAD
CURRENT, I_LOAD (A)
0.1
CURRENT-SENSE
RESISTOR, R_SENSE (mΩ)
1000
1
100
5
20
10
10
V_SOURCE
0 TO +28V
+3V TO +28V
V_CC
R_SENSE
RS+
I_RG1
R_G1
I_LOAD
TO LOAD BATTERY
RS-
MAX4376
R_G2
GAIN (+V/V)
20
50
100
20
50
100
20
50
100
20
50
100
BATTERY
R_SENSE
A1
FULL-SCALE OUTPUT VOLTAGE
(FULL-SCALE V_SENSE = 100mV),
V_OUT (V)
2.0
5.0
10.0
2.0
5.0
10.0
2.0
5.0
10.0
2.0
5.0
10.0
+3V TO +28V
V_CC
RS1+
RS1-
SYSTEM
AND
CHARGER
OUT1
CURRENT
MIRROR
OUT
V_{OUT AV = 2, 5,}
OUT
OR 10
I_RGD
RGD
GND
MAX4377
RS2-
RS2+
OUT2
Figure 1. Functional Diagram
monitor. This is useful for implementing either smart
battery packs or fuel gauges.
Current Source Circuit
Figure 3 shows a block diagram using the MAX4376
with a switching regulator to make a current source.
Figure 2. Bidirectional Current Monitor
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