The OPA569 is a low-cost, high-current, operational amplifier
designed for driving a wide variety of loads while operating on
low-voltage supplies. It operates from either single or dual
supplies for design flexibility and has rail-to-rail swing on the
input and output. Typical output swing is within 150mV of the
supply rails, with output current of 2A. Output swing closer to
the rails is achievable with lighter loads.
The OPA569 is unity gain stable, has low dc errors, is easy
to use, and free from the phase inversion problems found in
some power amplifiers. High performance is maintained at
voltage swings near the output rails.
The OPA569 provides an accurate user-selected current
limit that is set with an external resistor, or digitally adjusted
via a Digital-to-Analog Converter.
The OPA569 output can be independently disabled using the
Enable pin, saving power and protecting the load.
The IMONITOR pin provides a 1:475 bidirectional copy of the
output current. This eliminates the need for a series current
shunt resistor, allowing more voltage to be applied to the
load. This pin can be used for simple monitoring, or feedback
control to establish constant output current.
Two flags are provided: one for warning of thermal over-stress,
and one for current limit condition. The Thermal Flag
pin can be connected to the Enable pin to provide a thermal
Packaged in the Texas Instruments PowerPAD package,
it is small and easy to heat sink. The OPA569 is specified for
operation over the extended industrial temperature range,
40°C to +85°C.