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78M6610+PSU Data Sheet
2.9.2 I/R Voltage Drop Compensation
The PCB traces have a certain resistance that at high loads causes a voltage drop from the inlet to the
measurement point. The voltage drop causes an error in the voltage and power measurements. The
correction is proportional to the current measured. A coefficient proportional to the input stage resistance
is available and tunable by the user. Usually this coefficient is set by the user for a specific hardware and
does not require calibration.
2.10 External Temperature Monitor
The ATEMP1 and ATEMP2 inputs are dedicated to the acquisition of an external temperature. These
inputs are single ended with a range of +/-250 mV referenced to the 3.3VDC supply (V 3P3A ). The
converted value is multiplied by a user programmable gain and the results are reported in the EXTEMP
registers as a voltage drop from V 3P3 .
ATEMP1
X
EXTTEMP1
ExtOvTemp1
TEMP1GAIN
TEMP1THRES
ATEMP2
X
EXTTEMP2
ExtOvTemp2
TEMP2GAIN
TEMP2THRES
Figure 10: External Temperature Monitor
The output of the multiplier block is also compared with the value contained in a user-programmable
register to generate a corresponding alarm once that limit value is exceeded.
Rev 1
15
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