High Current/High Voltage OPAMP with Boost Output Current Greater Than 1A

This project provides High Voltage and High Current output swing. The board is built using OPA454 OPAMP and 2 x high current NPN/PNP BJT Transistors. Output transistors Q1 and Q2 provide positive and negative output currents to the load. The project works with an input power supply up to +/-50V DC. OPAMP V_out swings from +47V to -48V and OP output swings from +44.1V to -45.1V at 1A. Connect the J1 jumper to GND (EC Middle Pin + GND Pin) to Enable the output.

The output can be independently disabled using the Enable or Disable Pin that has its common return pin to allow easy interface to low-voltage logic circuitry. This disable is accomplished without disturbing the input signal path, not only saving power but also protecting the load.