Philips Semiconductors
Product specification
I2C-bus autosync deflection controller for
PC monitors
TDA4856
V
horizontal
flyback pulse
CC
1
2
V
(1)
V
HDRV
R4
HPLL2
6
INVERTING
BUFFER
SOFT START
OTA
HORIZONTAL
OUTPUT
STAGE
S
R
Q
Q
2.5 V
EHT
D2
transformer
3
V
BDRV
5 I
DISCHARGE
MOSFET
TR1
5
3
4
V
EHT adjustment
BOP
R1
R2
V
BIN
R3
D1
MGM081
4
V
BSENS
TR2
C
C1
C
BSENS
>2 nF
power-down
> 10 nF
BOP
(1) The recommended value for R4 is 1 kΩ.
a. Forward mode application.
handbook, full pagewidth
1
horizontal
flyback pulse
2
3
V
HDRV
t
on
t
V
BDRV
t
(discharge time of C
)
off
d(BDRV)
BSENS
V
V
BOP
BOP
4
5
V
I
BSENS
V
V
RESTART(BSENS)
STOP(BSENS)
MOSFET
MBG602
b. Waveforms for normal operation.
c. Waveforms for fault condition.
Fig.23 Application and timing for feed forward mode.
1999 Jul 13
41
NXP [ NXP ]
