TOTAL LOSSES

due to the diode

P = P1+ P2+ P3+ P4+ P5

Watts

SWITCHING

LOSSES

in the diode

OFF : P3 Watts

ON : P4 Watts

(Fig. 3 & 4)

CONDUCTION

LOSSES

in the diode

P1 Watts

(Fig. 2)

SWITCHING

LOSSES

in the transistor

due to the diode

P2 Watts

(Fig. 3)

REVERSE

LOSSES

in the diode

P2 Watts

(Fig. 2)

The

"A"

is

especially

designed to provide the lowest overall power

losses in any "Freewheel Mode" application (see

fig. 1) considering both the diode and the

companion transistor, thus optimizing the overall

performance in the end application.

The way of calculating the power losses is given

below :

APPLICATION DATA

DIODE:

TURBOSWITCH "A"

IL

LOAD

TRANSISTOR

SWITCHING

t

T

F= 1/T

= t/T

VR

Fig. 1 : "FREEWHEEL" MODE

STTA206S

3/8