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LMH6525: current superposition

Part Number: LMH6525

Hi Team,

Customer wants to increase the output current. He wants to stack up with multiple channels. 

He changes the IR input resistance, the current output size can be changed. If the resistance of the IR channel is fixed, and the differential signal is output through the IO port of the FPGA to control EN2+, EN2B-, the current is not superimposed at this time. Disconnect the EN2+ and EN2B- pins, the current value is still the same. How could he make the current reach more than 200mA?