AN3152

Grid connected inverter

Doc ID 17056 Rev 1

7/17

Figure 4.

BUCK current generator stage

Figure 5.

100 Hz bridge sync rectifier stage

The first stage, called the “BOOST” stage, is common to most solar inverters and power

factor correction (PFC) converters. A converter used as a front-end between PV panels and

inverter, amplifies the panel voltage into a DC BUS from 400 V to 500 V for 3 kW output

power. The BUS voltage should be lower than 450 V in order to permit the use of 450 V

capacitors, typically less expensive than 500 V capacitors. In order to limit the peak value of

the current on both the power MOSFET and the diode, this BOOST stage operates in