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TDA4856 Datasheet(PDF) 19 Page - NXP Semiconductors |
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TDA4856 Datasheet(HTML) 19 Page - NXP Semiconductors |
19 / 56 page 1999 Jul 13 19 Philips Semiconductors Product specification I2C-bus autosync deflection controller for PC monitors TDA4856 HORIZONTAL FLYBACK INPUT: PIN HFLB Vpos(HFLB) positive clamping level IHFLB =5mA − 5.5 − V Vneg(HFLB) negative clamping level IHFLB = −1mA −−0.75 − V Ipos(HFLB) positive clamping current −− 6mA Ineg(HFLB) negative clamping current −−−2mA Vsl(HFLB) slicing level − 2.8 − V Output stage for line driver pulses: pin HDRV OPEN-COLLECTOR OUTPUT STAGE Vsat(HDRV) saturation voltage IHDRV =20mA −− 0.3 V IHDRV =60mA −− 0.8 V ILO(HDRV) output leakage current VHDRV =16V −− 10 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 IHDRV =20mA; fH = 31.45 kHz; see Fig.16 42 45 48 % IHDRV =20mA; fH = 58 kHz; see Fig.16 45.5 48.5 51.5 % IHDRV =20mA; fH = 110 kHz; see Fig.16 49 52 55 % X-ray protection: pin XRAY VXRAY(sl) slicing voltage level for latch 6.22 6.39 6.56 V tW(XRAY)(min) minimum width of trigger pulse −− 30 µs Ri(XRAY) input resistance at XRAY (pin 2) VXRAY <6.38V+VBE 500 −− k Ω VXRAY >6.38V+VBE − 5 − k Ω standby mode − 5 − k 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 −− 4V VCC(XRAY)(max) maximum supply voltage for reset of the X-ray latch pin 9 connected to VCC via RXSEL 2 −− V RXSEL external resistor at pin 9 no reset via I2C-bus 56 − 130 k Ω SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT |
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