The OPA549 is a low-cost, high-voltage/high-current operational
amplifier ideal for driving a wide variety of loads. This
laser-trimmed monolithic integrated circuit provides excellent
low-level signal accuracy and high output voltage and current.
The OPA549 operates from either single or dual supplies for
design flexibility. The input common-mode range extends
below the negative supply.
The OPA549 is internally protected against over-temperature
conditions and current overloads. In addition, the OPA549
provides an accurate, user-selected current limit. Unlike
other designs which use a “power” resistor in series with the
output current path, the OPA549 senses the load indirectly.
This allows the current limit to be adjusted from 0A to 10A
with a resistor/potentiometer, or controlled digitally with a
voltage-out or current-out Digital-to-Analog Converter (DAC).
The Enable/Status (E/S) pin provides two functions. It can be
monitored to determine if the device is in thermal shutdown,
and it can be forced low to disable the output stage and
effectively disconnect the load.
The OPA549 is available in an 11-lead power package. Its
copper tab allows easy mounting to a heat sink for excellent
thermal performance. Operation is specified over the extended
industrial temperature range, –40°C to +85°C.