DocID027309 Rev 1

13/23

AN4638

HB series IGBTs on a 6 kW welder

23

components; for more details regarding these IGBTs, please refer to the relevant datasheet

available at www.st.com.

6.1

Overview of thermal and electrical measurements

The electrical measurements for the input power, output current and output power as well as

the temperature and time values achieved by the STGW60H65DFB IGBTs during the

electro-thermal analysis carried out on the board are detailed in the following table and

•

full load steady state operation at 90 A output current;

•

full load steady state operation at 130 A output current;

•

full load steady state operation at 165 A output current;

•

full load steady state operation at 200 A output current;

The case temperatures measurements were taken with thermocouples on the cases once

thermal stability was achieved by the devices running on the board. Operating times were

measured for maintained maximum output current (~200 A) until the thermal protection

interrupted operation.

Table 6. STGW60H65DFB main parameters

Device

Package

@25 °C

STGW60H65DFB

TO-247

650 V

60 A

175 °C

1.6 V

Table 7. Thermal and electrical measurements

Device

Output current

(A)

Input power

(W)

Output power

(W)

Temp (°C)

Time (min:s)

STGW60H65DFB

90

~2683

~2233

59

130

~3864

~3172

71

165

~4949

~3997

87

200

~5883

~4624

8 min: 15 s