AMC1301-Q1 Datasheet, PDF (19/34 Pages) Texas Instruments – Precision, 250-mV Input, Delay, Reinforced Isolated Amplifier

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9 Application and Implementation
AMC1301-Q1
SBAS792A – APRIL 2017 – REVISED APRIL 2017
NOTE
Information in the following applications sections is not part of the TI component
specification, and TI does not warrant its accuracy or completeness. TI’s customers are
responsible for determining suitability of components for their purposes. Customers should
validate and test their design implementation to confirm system functionality.
9.1 Application Information
The AMC1301-Q1 device offers unique linearity, high input common-mode and power-supply rejection, low ac
and dc errors, and low temperature drift. These features make the AMC1301-Q1 device a robust, high-
performance, isolated amplifier for automotive applications where high voltage isolation is required.
9.2 Typical Applications
9.2.1 Traction Inverter Application
Figure 49 shows a typical operation of the AMC1301-Q1 device for current sensing in a traction inverter
application. Phase current measurement is done through the shunt resistor, R_SHUNT (in this case, a two-pin
shunt). The differential input and the high common-mode transient immunity of the AMC1301-Q1 device ensure
reliable and accurate operation even in high-noise environments (such as the power stage of the traction
inverter).
Additionally, the AMC1301-Q1 device may also be used for isolated voltage measurement of the dc-link, as
described in Isolated Voltage Sensing.
Floating
Power Supply
HV+
15 V
To Load
RSHUNT
Gate Driver
Gate Driver
R1
AMC1301-Q1
5.1 V
VDD1
VDD2
C1
C2
D1
10 F 0.1 F
C4
C5
0.1 F 2.2 F
GND1
GND2
VINN
VINP
VOUTP
VOUTN
R2
C3
R3
3.3 V
TMS570L
ADC
HV-
Copyright © 2016, Texas Instruments Incorporated
Figure 49. Using the AMC1301-Q1 Device for Current Sensing in Traction Inverters
Copyright © 2017, Texas Instruments Incorporated
Product Folder Links: AMC1301-Q1
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