Fig. A : ”FREEWHEEL” MODE.

TOTAL LOSSES

due to the diode

P = P1+ P2+ P3+ P4+ P5

Watts

SWITCHING

LOSSES

in the diode

SWITCHING

LOSSES

in the tansistor

due to the diode

CONDUCTION

LOSSES

in the diode

REVERSE

LOSSES

in the diode

The 1200V TURBOSWITCH

series has been

designed to provide the lowest overall power

losses in all high frequency or high pulsed current

operations. In such applications (Fig A to D),the

way of calculating the power losses is given below :

APPLICATION DATA

DIODE:

TURBOSWITCH

IL

LOAD

TRANSISTOR

SWITCHING

t

T

F= 1/T

= t/T

VR

STTA512D/F/B

5/10