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dc1540bf
DEMO MANUAL DC1540B
MEASURING CURRENT
It is possible to measure the current on Channel 6 by using
Channel 7 in “Hi Res” mode. Follow the instructions on
pp.9 and 10 of DC1361B schematic. Remove R88, R89
and move them to R86, R87. Also remove the preload
resistor R75 (top side) on DC1361B schematic p.9 to
measure only the current going out of the board.
One simple checkbox in the GUI sets up Channel 7 to mea-
sure current. In the MFR_CONFIG_LTC2977 register check
the box that says “adc_hires”. Apply a load between the
big turrets 1.0V and GND on V
OUT_6
and read the voltage
across the 10mΩ current sense resistor by viewing the
READ_VOUT register on Channel 7 in the GUI.
Figure 11. Current Sensing Modifications (Bottom Side of Board)
