BL8303 electronic starter http://www.belling.com.cn - 1 - 8/8/2006 total 4 pages BL8303 a special control ic for electronic starter features function of preheat and ignition programmable preheat time and ignition times comprehensive fault protection low power start esd protection description 1. BL8303 is a special control ic for electronic st arter. this integrated circuit performs the function of preheat and igniti on do with the controlling of both way switch. 2. during the moment of preheating, BL8303 can insu re the re-preheat of different types lamp by using the pi n7 and pin8 to setting the preheat time. so that the ic pr olongs the lamp life effectively. 3. the ic can re-ignition 4 times or 8 times by set ting the pin6, thereby protects the lamp. typical application
BL8303 electronic starter http://www.belling.com.cn - 2 - 8/8/2006 total 4 pages block diagram
BL8303 electronic starter http://www.belling.com.cn - 3 - 8/8/2006 total 4 pages lead assignments & definition pin symbol description 1 vcc power supply 2 sd lamp state inspect input 3 sc state controlling input 4 ig ignition controlling input 5 gnd power ground 6 is ignition times setting input 7 ps2 preheat time setting input 8 ps1 preheat time setting input2 electronic characteristic ta=25 c vcc=5v symbol parameter definition test condition min typ max unit istart start-up current vcc 2.7v 10 ua iq_vcc quiescent power drain current vcc=5v,sd 100hz 25 ua vsc_l draw in current capacity of sc output low input 1ma to the sc and testing the voltage after 2.5 second 0.5 v vsc_h leakage current of sc output high input 5v on the sc and testing the leakage current during the 2.5s (according to fig.1) 10 ua vig_l draw in current capacity of ig output low input 10ma current to the ig and testing the voltage after 2.5 second 0.5 v vig_h leakage current of ig output high input 5v on the ig and testing the leakage current during the 2.5s (according to fig.1) 10 ua tig ignition times fig. 1 k1 k2 on 1 s tpre_1 preheat time of 1s k1 k2 on k3 k4 2 1 s tpre_1.5 preheat time of 1.5s k1 k2 on k4 2 1.5 s tpre_2 preheat time of 2s k1 k2 on k3 2 2 s tpre_2.5 preheat time of 2.5s fig.2 k1 k2 on 2.5 s 8 lead sop or dip
BL8303 electronic starter http://www.belling.com.cn - 4 - 8/8/2006 total 4 pages normal ignition sd ... sc ig 2 . 5 s output low tpre sd 100hz vp=5v, 90 duty cycle , preheat time 2.5s 2.5s output low ignition successful fig. 1 sd ... sc ig 2 . 5 s 1 s ... ... x 2 . 5 s 1 s ... ignite for 8 times output low tpre tig sd 100hz vp=5v, 90 duty cycle , preheat time 2.5s failure mode re-ignition fig. 2
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