shaoxing silicore technology co.,ltd www. silicore. com. cn chmc 1/3 b/w tv synchronization, deflection circuit LA7806 description: outline drawing the LA7806 is a multifunctional integrated circuit, incorporates various functions required for synchronization and deflection circuits of monochromatic television set, and operates on line voltage or from battery. this ic was so designed as to streamline the set by making the device more compact (dip-16) and reducing the number of parts. features the ground pins for horizontal and vertical are provided separately. minimum number of parts required. horizontal and vertical oscillators being stable to variation of ambient temperature and supply voltage owing to small warming-up drift. small variation of horizontal oscillation frequency. good linearity and interlace owing to dc bias at vertical output stage being sampling controlled within retrace time. vertical blanking pulse width being freely set up according to peripheral parts. absolute maximum ratings (ta=25 c) characteristics symbol condition value units maximum supply voltage v 12 ,v 15 14 v allowable power dissipation pd max ta=60 c 450 mw operating temperature topr -20~ +85 c storage temperature tstg -55 ~ +125 c recommended operating condition (ta=25 c) characteristics symbol condition value units recommended supply voltage v 12 ,v 15 12 v tiger electronic co.,ltd
shaoxing silicore technology co.,ltd www. silicore. com. cn chmc 2/3 electrical characteristics ( ta=25 c) characteristics symbol test conditions min typ max unit v cc 12 current drain i cc 12 10.0 13.0 19.0 ma v cc 15 current drain i cc 15 6.0 8.0 11.0 ma vertical frequency pull-in range 9.0 10.0 11.0 hz vertical free-running frequency f v f v center 55hz 50 55.0 60 hz supply voltage dependence of vertical frequency v 12 =12 ? 1v 55hz at 12v -0.5 +0.5 hz temperature characteristic of vertical frequency ta=-10 to +60 ?? -0.028 +0.028 hz/ ?? vertical driver amplification factor 4.0 7.0 times horizontal free-running frequency f h f h center 15.750khz -750 +750 hz supply voltage dependence of horizontal frequency v 15 =12 ? 1v 15.750khz at 12v -50 +50 hz temperature characteristic of horizontal frequency ta=-10 to +60 ?? -3.4 +3.4 hz/ ?? horizontal output pulse width f h =15.750khz 21.5 24.0 26.5 s horizontal output driver current 4.2 6.0 7.8 ma power dissipation curve
shaoxing silicore technology co.,ltd www. silicore. com. cn chmc 3/3 application circuit ? polyester-polypropylene film capa citor unit(resistance: ? , capacitance:f) note) 1.the vertical the vertical output circuit is shown by the basic circuit. 2. the peripheral parts at pin 8 should be changed in accordance with the ver. out circuit conditions. 3. the limiting resistor (220 : : 1vp-p) at pin 14 should be changed in proportion to the magnitude of the input video signal. 4. in the time constant circuit (120k : , 4.7 p f) at pin 14, the time constant should be changed by changing the resistance value in accordance with the dc level of the input video signal and then by changing the capacitance value. peripheral parts at pin 8 (other applications) r1 c1 r2 c2 line operate 220k ? 0.01f 68k ? 0.068f battery drive(pump-up) 220k ? 0.0033f 68k ? 0.068f
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