TDA4857 View Datasheet(PDF) - Philips Electronics
Part Name
Description
Manufacturer
TDA4857 Datasheet PDF : 56 Pages
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Philips Semiconductors
I2C-bus autosync deflection controller for
PC monitors
Product specification
TDA4857PS
SYMBOL
PARAMETER
CONDITIONS
MIN. TYP.
VHEHT(EWDRV)
Ii(HSMOD)
Ri(HSMOD)
Vref(HSMOD)
fro(HSMOD)
EHT compensation on
horizontal size via HSMOD
(pin 31)
input current (pin 31)
input resistance
reference voltage at input
roll-off frequency (−3 dB)
IHSMOD = 0; note 8
−
IHSMOD = −120 µA; note 8 −
VHEHT = 0.02 V
−
VHEHT = 0.69 V
−
300
IHSMOD = 0
−
IHSMOD = −60 µA + 15 µA 1
(RMS)
0.69
0.02
0
−120
−
5.0
−
TRACKING OF EWDRV OUTPUT SIGNAL WITH HORIZONTAL FREQUENCY PROPORTIONAL VOLTAGE
fH(MULTI)
VPAR(EWDRV)
LEEWDRV
horizontal frequency range for
15
tracking
parabola amplitude at EWDRV IHREF = 1.052 mA;
−
(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
linearity error of horizontal
−
frequency tracking
−
0.72
1.42
1.42
−
Output for asymmetric EW corrections: pin ASCOR
VHPARAL(ASCOR) vertical sawtooth voltage for
EW parallelogram correction
VHPINBAL(ASCOR) vertical parabola voltage for pin
unbalance correction
Vo(ASCOR)(max)(p-p) maximum output voltage swing
(peak-to-peak value)
Vo(ASCOR)(max)
Vc(ASCOR)
Vo(ASCOR)(min)
Io(ASCOR)(max)
maximum output voltage
centre voltage
minimum output voltage
maximum output current
register HPARAL = 0;
−
control bit HPC = 0; note 8
register HPARAL = 15; −
control bit HPC = 0; note 8
register HPARAL = X;
−
control bit HPC = 1; note 8
register HPINBAL = 0;
−
control bit HBC = 0; note 8
register HPINBAL = 15; −
control bit HBC = 0; note 8
register HPINBAL = X;
−
control bit HBC = 1; note 8
−
−
−
−
VASCOR ≥ 1.9 V
−
−0.825
0.825
0.05
−1.0
1.0
0.05
4
6.5
4.0
1.9
−1.5
MAX.
−
−
−
−
500
−
−
80
−
−
−
8
−
−
−
−
−
−
−
−
−
−
−
UNIT
V
V
µA
µA
Ω
V
MHz
kHz
V
V
V
%
V
V
V
V
V
V
V
V
V
V
mA
2000 Jan 31
21
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