TDA4857 데이터 시트보기 (PDF) - Philips Electronics
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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.
TCfr
fH(max)
VHREF
temperature coefficient of
free-running frequency
maximum oscillator frequency
voltage at input for reference
current
−100
−
2.43
Unlock blanking detection: pin HUNLOCK
Vscan(HUNLOCK)
low level voltage of HUNLOCK saturation voltage in case −
of locked PLL1; internal
sink current = 1 mA
Vblank(HUNLOCK)
TCblank
TCsink
Isink(int)
IL(max)
IL
blanking level of HUNLOCK external load current = 0 0.9
temperature coefficient of
−
Vblank(HUNLOCK)
temperature coefficient of
−
Isink(HUNLOCK)
internal sink current
for blanking pulses;
1.4
PLL1 locked
maximum external load current VHUNLOCK = 1 V
−
leakage current
VHUNLOCK = 5 V in case of −
unlocked PLL1 and/or
protection active
PLL1 phase comparator and frequency-locked loop: pins HPLL1 and HBUF
tW(HSYNC)(max)
maximum width of horizontal
−
sync pulse (referenced to line
period)
tlock(HPLL1)
total lock-in time of PLL1
−
Ictrl(HPLL1)
control currents
notes 4 and 5
locked mode, level 1 −
locked mode, level 2 −
VHBUF
buffered f/v voltage at HBUF minimum horizontal
−
(pin 27)
frequency
maximum horizontal
−
frequency
Phase adjustments and corrections via PLL1 and PLL2
HPOS
HPINBAL
horizontal position (referenced
to horizontal period)
horizontal pin unbalance
correction via HPLL2
(referenced to horizontal
period)
register HPOS = 0
−
register HPOS = 127
−
register HPOS = 255
−
register HPINBAL = 0;
−
control bit HPC = 0; note 6
register HPINBAL = 15; −
control bit HPC = 0; note 6
register HPINBAL = X;
−
control bit HPC = 1; note 6
TYP.
0
−
2.55
−
1
−0.9
0.15
2.0
−
−
−
40
15
145
2.5
0.5
−13
0
13
−0.8
0.8
0
MAX. UNIT
+100 10−6/K
130
kHz
2.68 V
250
mV
1.1
V
−
mV/K
−
%/K
2.6
mA
−2
mA
±5
µA
25
%
80
ms
−
µA
−
µA
−
V
−
V
−
%
−
%
−
%
−
%
−
%
−
%
2000 Jan 31
16
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