BY448 Datasheet, PDF (6/7 Pages) NXP Semiconductors – Damper diode

Philips Semiconductors
Damper diode
Product specification
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 R_{th j-a} and
the difference between T_{j max} and T_{amb max} in the application. The maximum I_FWM 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 I_FWM (see Fig.2).
handbook, _hha_ol_rfp_iza_og_ne_tal
deflection
transistor
D1
LY
MBE935
+ (E-W)
D1 = BY448.
Fig.8 Application in basic high-voltage E/W
modulator circuit.
handbook, hhaolfrpizaogental
deflection
transistor
MBE934
D1
Cf
LY
Cs
D1 = BY448.
Fig.9 Application in basic horizontal deflection
circuit.
handbook, full pagewidth
IF
VR
I _FRM
I _FWM
time
VRRM
1996 Sep 26
tp
T
Fig.10 Basic application waveforms.
6
time
MCD430 - 1