Philips Semiconductors
Product specification
I2C-bus autosync deflection controller for
PC monitors
TDA4856
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
TRACKING OF EWDRV OUTPUT SIGNAL WITH HORIZONTAL FREQUENCY PROPORTIONAL VOLTAGE
fH(MULTI)
horizontal frequency range for
tracking
15
−
80
kHz
VPAR(EWDRV)
parabola amplitude at EWDRV IHREF = 1.052 mA;
−
0.72
1.42
−
−
V
V
(pin 11)
fH = 31.45 kHz; control
bit FHMULT = 1; note 10
IHREF = 2.341 mA;
−
fH = 70 kHz; control
bit FHMULT = 1; note 10
function disabled; control
bit FHMULT = 0; note 10
−
−
1.42
−
V
LEEWDRV
linearity error of horizontal
frequency tracking
−
8
%
Output for asymmetric EW corrections: pin ASCOR
VHPARAL(ASCOR)
vertical sawtooth voltage for
EW parallelogram correction
register HPARAL = 0;
note 8
−
−
−
−
−
−
−
−0.825
0.825
0.05
−1.0
1.0
−
−
−
−
−
−
−
V
V
V
V
V
V
V
register HPARAL = 63;
note 8
register HPARAL = 32;
note 8
VHPINBAL(ASCOR)
vertical parabola for pin
unbalance correction
register HPINBAL = 0;
note 8
register HPINBAL = 63;
note 8
register HPINBAL = 32;
note 8
0.05
4
Vo(ASCOR)(max)(p-p) maximum output voltage swing
(peak-to-peak value)
Vo(ASCOR)(max)
Vc(ASCOR)
maximum output voltage
centre voltage
−
−
−
−
−
6.5
4.0
1.9
−1.5
50
−
−
−
−
−
V
V
Vo(ASCOR)(min)
Io(ASCOR)(max)
Io(sink)(ASCOR)(max)
minimum output voltage
maximum output current
maximum output sink current
V
V
ASCOR ≥ 1.9 V
ASCOR ≥ 1.9 V
mA
µA
V
Focus section: pin FOCUS; see Figs 15 and 28
tprecor
pre-correction of phase for
horizontal focus parabola
register HFOCAD = 0
register HFOCAD = 1
register HFOCAD = 2
register HFOCAD = 3
−
300
350
400
450
−
−
−
−
−
−
ns
ns
ns
ns
µs
−
−
−
tW(hfb)(min)
tW(hfb)(max)
minimum horizontal flyback
pulse width
1.9
maximum horizontal flyback
pulse width
−
−
5.5
µs
1999 Jul 13
23
NXP [ NXP ]
