BY448 datasheet(6/7 Pages) PHILIPS

6 / 7 page

1996 Sep 26

Philips Semiconductors

Product speciﬁcation

Damper diode

BY448

APPLICATION INFORMATION

For horizontal deflection circuits, two basic applications are shown in Figs 8 and 9.

The maximum allowable total power dissipation for the diode can be calculated from the thermal resistance Rth j-a and

the difference between Tj max and Tamb max in the application. The maximum IFWM can then be taken from Fig.2.

The basic application waveforms in Fig.10 relate to the circuit in Fig.8. In the circuit in Fig.9 the forward conduction time

of the diode is shorter, allowing a higher IFWM (see Fig.2).

Fig.8

Application in basic high-voltage E/W

modulator circuit.

D1 = BY448.

handbook, halfpage

MBE935

+ (E-W)

horizontal

deflection

transistor

Fig.9

Application in basic horizontal deflection

circuit.

D1 = BY448.

handbook, halfpage

MBE934

horizontal

deflection

transistor

Fig.10 Basic application waveforms.

handbook, full pagewidth

I F

t p

I FRM

VRRM

I FWM

time

MCD430 - 1

BY448 Datasheet(PDF) 6 Page - NXP Semiconductors