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MAX4173TESA Datasheet(PDF) 8 Page - Maxim Integrated Products |
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MAX4173TESA Datasheet(HTML) 8 Page - Maxim Integrated Products |
8 / 10 page Low-Cost, SOT23, Voltage-Output, High-Side Current-Sense Amplifier 8 _______________________________________________________________________________________ amp’s supply voltage range should be at least as high as any voltage the system may encounter. The percent error introduced by output loading is determined with the following formula: where RLOAD is the external load applied to OUT. Current Source Circuit Figure 3 shows a block diagram using the MAX4173 with a switching regulator to make a current source. % 100 R 12k R 1 ERROR LOAD LOAD = Ω+ − ⎛ ⎝ ⎜ ⎞ ⎠ ⎟ Table 1. Recommended Component Values MAX4173T VSENSE RSENSE +3V TO +28V 0.1 µF RS+ + 0.3 in. COPPER INPUT LOAD/BATTERY 0.3 in. COPPER 0.1 in. COPPER RS- GND OUT VCC _ Figure 2. MAX4173 Connections Showing Use of PC Board Figure 3. Current Source MAX4173 RSENSE ILOAD 0 TO +28V VSENSE VCC OUT VIN GND RS+ +3V TO +28V 0.1 µF RS- LOAD/ BATTERY LOW-COST SWITCHING REGULATOR 10.0 100 5.0 50 2.0 10 10 20 10.0 100 5.0 50 2.0 5 20 20 10.0 100 5.0 50 2.0 1 100 20 10.0 100 5.0 50 1000 CURRENT-SENSE RESISTOR RSENSE (m Ω Ω) 20 GAIN 2.0 0.1 FULL-SCALE OUTPUT VOLTAGE (FULL-SCALE VSENSE = 100mV) VOUT (V) FULL-SCALE LOAD CURRENT ILOAD (A) |
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