TDA4841 datasheet(19/60 Pages) PHILIPS

19 / 60 page

1999 Oct 25

Philips Semiconductors

Product speciﬁcation

I2C-bus autosync deﬂection controller for

PC monitors

TDA4841PS

HORIZONTAL FLYBACK INPUT: PIN HFLB

Vpos(HFLB)

positive clamping level

Ii(HFLB) =5mA

−

5.5

−

Vneg(HFLB)

negative clamping level

Ii(HFLB) = −1mA

−−0.75

−

Ipos(HFLB)

positive clamping current

−−

6mA

Ineg(HFLB)

negative clamping current

−−−2mA

Vsl(HFLB)

slicing level

−

2.8

−

Output stage for line driver pulses: pin HDRV

OPEN-COLLECTOR OUTPUT STAGE

Vsat(HDRV)

saturation voltage

Io(HDRV) =20mA

−−

0.3

Io(HDRV) =60mA

−−

0.8

ILO(HDRV)

output leakage current

VHDRV =16V

−−

µA

AUTOMATIC VARIATION OF DUTY CYCLE

tHDRV(OFF)/tH

relative tOFF time of HDRV

output; measured at

VHDRV = 3 V; HDRV duty cycle

is modulated by the relation

IHREF/IVREF

Io(HDRV) =20mA;

fH = 31.45 kHz; see Fig.16

Io(HDRV) =20mA;

fH = 58 kHz; see Fig.16

45.5

48.5

51.5

Io(HDRV) =20mA;

fH = 110 kHz; see Fig.16

X-ray protection: pin XRAY

VXRAY(sl)

slicing voltage level for latch

6.22

6.39

6.56

tW(XRAY)(min)

minimum width of trigger pulse

−−

µs

Ri(XRAY)

input resistance at XRAY

(pin 2)

VXRAY <6.38V+VBE

500

−−

Ω

VXRAY >6.38V+VBE

−

Ω

standby mode

−

Ω

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

RXSEL

switch off VCC, then re-apply VCC

VCC(XRAY)(min)

minimum supply voltage for

correct function of the X-ray

latch

pin 9 connected to VCC via

RXSEL

−−

VCC(XRAY)(max)

maximum supply voltage for

reset of the X-ray latch

pin 9 connected to VCC via

RXSEL

−−

RXSEL

external resistor at pin 9

no reset via I2C-bus

−

130

Ω

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNIT

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