Pcb1_Error Amp / Current Reference (0558038317) - ESAB Powercut 1600 Service Manual

SECTION 4 DESCRIPTION Of OPERATION

4.8.3 PCB1_Error Amp / Current Reference (0558038317)

The Control board sets the current output level and receives the error signals from the hall sensors mount-
ed on the power board. The control board micro controller receives the current reference input current
reference circuit and then outputs that on U5 pin 47 as the SDO signal. This combined with the clock signal
SCK on U5 pin 45 set the current reference level on U4 and U6. These reference signals are summed
against the signals from the hall sensors to set the current signal.
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