Power Losses at 64 KHz

Switching Time Inductive Load at 64KHz

(see figure 2)

In order to saturate the power switch and reduce

conduction losses, adequate direct base current

= 100

transistor to turn off (retrace phase). Most of the

dissipation,

especially

in

the

deflection

application, occurs at switch-off so it is essential

new set of curves have been defined to give total

KHz scanning frequencies for choosing the

optimum drive. The test circuit is illustrated in

figure 1.

The values of L and C are calculated from the

following equations:

1

2

L

1

2

C

ω = 2 πf =

1

√

flyback voltage, f= frequency of oscillation during

retrace.

BASE DRIVE INFORMATION

Reverse Biased SOA

BUW1015

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