BY479X-1700 Datasheet, PDF (3/6 Pages) NXP Semiconductors – Damper diode fast, high-voltage

Philips Semiconductors
Damper diode
fast, high-voltage
Product specification
BY479X-1700
IF
10%
tfr
time
VF
V _fr
5V / 2V
VF
time
Fig.1. Definition of Vfr and tfr
I
F
dI
F
dt
trr
time
Qs
I
R
25%
100%
Fig.2. Definition of t_rr and Q_s
VCC
Line output transformer
LY
Cf
Cs
deflection transistor
D1
Fig.3. Basic horizontal deflection circuit.
Maximum pulse width / us
100
V
BY479X-1700
VRRM
pulse
time
width tp period T
10
1
10
100
line frequency / kHz
Fig.4. Maximum allowable pulse width t_p versus line
frequency; Basic horizontal deflection circuit.
6 ^{Ptot / W}
5
IF IFWM
BY479X
Ths / C121.2
4
ton
time
f = 64 kHz
3
130.8
2
140.4
1
0
150
0
2
4
6
8
10
IFWM / A
Fig.5. Total dissipation P_tot = f(I_FWM); including forward
recovery losses; Basic horizontal deflection circuit.
IF / A
30
Tj = 125 C
Tj = 25 C
20
typ
10
BY459
max
Fig.6.
0
0
0.5
1
1.5
2
VF / V
Typical and maximum forward characteristic
I_F = f(V_F); parameter T_j
September 1998
3
Rev 1.200