Hi,
1) I am using OPA548 as power amplifier for driving the DC motor with proper Heat Sink.The IC is going into thermal shutdown mode after running the motor continuously for 4 minutes.I measured the temperature at which thermal shutdown has occurred and it is 101 degC. But in datasheet it is mentioned that thermal shutdown occurs at 160 degC.
2) My motor is drawing only 300mA at 28V but, the IC is dissipating lot of heat,how to address this issue?
3) Is this IC is suitable for driving the motor continuously for 20 minutes at working temperature of +75 degC