TDA4855 Datasheet, PDF (19/44 Pages) NXP Semiconductors – Autosync Deflection Controller ASDC

Philips Semiconductors
Autosync Deflection Controller (ASDC)
Preliminary specification
TDA4855
SYMBOL
PARAMETER
CONDITIONS
MIN.
ADJUSTMENT OF TRAPEZIUM CORRECTION (see Figs 3 to 8) [EWTRP (PIN 20)]
V_TRP(EWDRV)
trapezium correction voltage
I_EWTRP = 0; note 11
I_EWTRP = −135 µA;
note 11
I_EWTRP
input current for maximum
positive trapezium correction
input current for maximum
negative trapezium correction
V_ref(EWTRP)
V_off(EWTRP)
reference voltage at input
trapezium correction is centred
if EWTRP (pin 20) is forced to
ground
V_PARM(p-p)
amplitude of superimposed
logarithmic parabola
(peak-to-peak value)
note 15
−
−
−110
−
−
0
−
TRACKING OF EWDRV OUTPUT SIGNAL WITH f_H PROPORTIONAL VOLTAGE
f_H(MULTI)
f_H range for tracking
24
V_PAR(EWDRV)
parabola amplitude at EWDRV I_HREF = 1.052 mA;
1.3
(pin 11)
f_H = 31.45 kHz; note 16
I_HREF = 2.341 mA;
2.7
f_H = 70 kHz; note 16
function disabled; note 16 2.7
δV_EWDRV
linearity error of f_H tracking
−
V_EWWID
voltage range to inhibit tracking
0
Focus section [FOCUS (pin 10)]
I_FOCUS(p-p)
amplitude of horizontal
V_FOCUS = 1 V
−
parabola (peak-to-peak value) _{VFOCUS = 4 V}
−
V_FOCUS(min)
input voltage for minimum
0.9
horizontal parabola amplitude
V_FOCUS(max)
input voltage for maximum
horizontal parabola amplitude
3.65
TYP.
−0.5
+0.5
−120
0
5.0
−
−
−
1.45
3.0
3.0
−
−
0.03
1
1.0
4.0
MAX. UNIT
−
V
−
V
−135 µA
−
µA
−
V
0.1
V
145
mV
80
kHz
1.6
V
3.3
V
3.3
V
8
%
0.1
V
−
mA
−
mA
1.1
V
4.4
V
1996 Jul 18
19