TDA4856 Datasheet, PDF (23/56 Pages) NXP Semiconductors – I2C-bus autosync deflection controller for PC monitors

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