A simple device for converting unipolar power to bipolar, for example, when it is not possible to use an appropriate transformer with a mid-point tap. Such a case may occur, for example, when powering an amplifier or other devices. Unlike a simple resistor divider, the circuit allows you to get a stable identical voltage at the output equal to half the input. The principle of operation of the converter is similar to the operation of a compensation voltage stabilizer. The microchip compares the model voltage supplied to the non-inverting input from the resistive divider with the voltage supplied to the inverting input from the output of the device. In accordance with this, the output signal that regulates the unlocking / locking of the output transistors is adjusted. The maximum input voltage is limited by the supply voltage of the operational amplifier. A feature of this model can be considered the ability to adjust the output voltage in the shoulders proportionally with the help of a multi-revolution tuning resistor.
Characteristics:
- UVX: 9 ... 30 V;
- CURRENT SYMMETRIC LOAD CURRENT: 3 A;
- ASYMMETRIC LOAD CURRENT: 1 A