ST ISV001V1 User Manual

1000 W dual stage DC-AC converter demonstration board

Features

■ Nominal input voltage: 24 V

■ Output voltage: 230 Vrms, 50 Hz

■ Output power: 1 kW

■ Efficiency: 90%

■ Switching frequency: 100 kHz (DC-DC); 16

kHz (DC-AC)

Description

The STEVAL-ISV001V1 demonstration board
implements a 1 kW dual stage DC-AC converter,
suitable for use in battery powered uninterruptible
power supplies (UPS) or photovoltaic (PV) stand
alone systems. The converter is powered from a
low DC input voltage varying from 20 V to 28 V
and is capable of supplying up to 1 kW output
power on a single phase AC load. These features
are met with a dual stage conversion topology
including an efficient step-up push-pull DC-DC
converter, to produce a regulated high voltage DC
bus, and a sinusoidal h-bridge PWM inverter to
generate a 50 Hz, 230 Vrms output sine wave.
Other relevant features of the proposed system
are high power density, high switching frequency,
galvanic isolation and efficiency greater than 90%
over a wide output load range.

STEVAL-ISV001V1

based on the STP160N75F3

Data Brief

STEVAL-ISV001V1

November 2008 Rev 1 1/6

For further information contact your local STMicroelectronics sales office.

www.st.com

6

Circuit schematics STEVAL-ISV001V1

GND

C3

1 Circuit schematics

Figure 1. Converter schematic: the power stage

VIN

C38

D1

D4

D2

D3

D13

R92

M1

R91

GATE A

R94

R95

C34 C35 C36

C53

R96

D14

R2

C7

R90 R87

GATE B

G H 1

S H1

G L1

V A

R88

Igbt1

1

Igbt4

M5

M6 M4

G H2

G L 2

T1

T2

R1

C8

V AC 2

R97

D15

Igbt2

Igbt3

2/6

AM00632v1