Philips Semiconductors
Product specification
Economy Autosync Deflection Controller
(EASDC)
TDA4858
APPLICATION INFORMATION
handbook, full pagewidth
2
V
V
HDRV
CC
R6
V
i
7
6
L
3
V
BDRV
D2
S
R
Q
Q
OTA
2.5 V
TR1
HORIZONTAL
OUTPUT
INVERTING
BUFFER
STAGE
DISCHARGE
5
3
4
D1
1
horizontal
flyback pulse
V
V
BIN
BOP
4
R5
R1
R3
V
BSENS
C4
R4
C1
R2
C2
MBG599
C
BOP
>4.7 nF
EWDRV
For f < 50 kHz and C2 < 47 nF calculation formulas and behaviour of the OTA are the same as for an OP. An exception is the limited output current at
BOP (pin 3). See Chapter “Characteristics”, sub heading “B+ control section (see Figs 12 and 13)”.
a. Feedback mode application.
handbook, full pagewidth
1
horizontal
flyback pulse
2
3
V
HDRV
t
on
t
V
BDRV
t
d(BDRV)
off(min)
V
= V
BSENS
V
BOP
V
4
RESTART(BSENS)
BSENS
V
STOP(BSENS)
MBG600
b. Waveforms for normal operation.
c. Waveforms for fault condition.
Fig.12 Application and timing for feedback mode.
1997 Oct 27
27
NXP [ NXP ]
