Philips Semiconductors
Product specification
I2C-bus autosync deflection controller for
PC monitors
TDA4841PS
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
HORIZONTAL FLYBACK INPUT: PIN HFLB
Vpos(HFLB)
Vneg(HFLB)
Ipos(HFLB)
Ineg(HFLB)
Vsl(HFLB)
positive clamping level
negative clamping level
positive clamping current
negative clamping current
slicing level
Ii(HFLB) = 5 mA
−
−
−
−
−
5.5
−
V
Ii(HFLB) = −1 mA
−0.75
−
−
V
6
mA
mA
V
−
−2
−
2.8
Output stage for line driver pulses: pin HDRV
OPEN-COLLECTOR OUTPUT STAGE
Vsat(HDRV)
saturation voltage
Io(HDRV) = 20 mA
−
−
−
−
−
−
0.3
0.8
10
V
Io(HDRV) = 60 mA
V
ILO(HDRV)
output leakage current
VHDRV = 16 V
µA
AUTOMATIC VARIATION OF DUTY CYCLE
tHDRV(OFF)/tH
relative tOFF time of HDRV
output; measured at
HDRV = 3 V; HDRV duty cycle
is modulated by the relation
IHREF/IVREF
Io(HDRV) = 20 mA;
fH = 31.45 kHz; see Fig.16
42
45
48
%
%
%
V
I
o(HDRV) = 20 mA;
fH = 58 kHz; see Fig.16
o(HDRV) = 20 mA;
fH = 110 kHz; see Fig.16
45.5
49
48.5
52
51.5
55
I
X-ray protection: pin XRAY
VXRAY(sl)
slicing voltage level for latch
6.22
−
6.39
6.56
30
−
V
tW(XRAY)(min)
Ri(XRAY)
minimum width of trigger pulse
−
−
5
5
µs
kΩ
kΩ
kΩ
input resistance at XRAY
(pin 2)
VXRAY < 6.38 V + VBE
XRAY > 6.38 V + VBE
500
−
V
−
standby mode
−
−
XRAYrst
reset of X-ray latch
pin 9 open-circuit or
connected to GND
set control bit SOFTST via I2C-bus
pin 9 connected to VCC via switch off VCC, then re-apply VCC
RXSEL
VCC(XRAY)(min)
minimum supply voltage for
correct function of the X-ray
latch
pin 9 connected to VCC via
RXSEL
−
−
4
V
VCC(XRAY)(max)
RXSEL
maximum supply voltage for
reset of the X-ray latch
pin 9 connected to VCC via
RXSEL
no reset via I2C-bus
2
−
−
−
V
external resistor at pin 9
56
130
kΩ
1999 Oct 25
19
NXP [ NXP ]
