BL8303 Electronic Starter 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 Starter. This integrated circuit performs the function of preheat and ignition do with the controlling of both way switch. 2. During the moment of preheating, BL8303 can insure the re-preheat of different type’s lamp by using the PIN7 and PIN8 to setting the preheat time. So that the IC prolongs the lamp life effectively. 3. The IC can re-ignition 4 times or 8 times by setting the PIN6, thereby protects the lamp. Typical Application http://www.belling.com.cn -1Total 4 Pages 8/8/2006 BL8303 Electronic Starter Block Diagram http://www.belling.com.cn -2Total 4 Pages 8/8/2006 BL8303 Electronic Starter 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 6 IS Ignition times setting input 7 PS2 Preheat time setting input 8 PS1 Preheat time setting input2 Power ground 8 LEAD SOP or DIP Electronic Characteristic TA=25°C ，VCC=5V Symbol Istart IQ_vcc Parameter Definition Test condition Start-up current Quiescent power drain Min Typ Max Unit Vcc＝2.7V 10 uA Vcc=5V,SD＝100Hz 25 uA current Input 1mA to the SC and 0.5 V of testing the voltage after 10 uA 0.5 V 10 uA current VSC_L Draw in capacity VSC_H SC output low 2.5 second Leakage current of SC Input 5V on the SC and output High testing the leakage current during the 2.5s (according to Fig.1) VIG_L VIG_H Draw in current Input 10mA current to capacity of IG output the IG and testing the low voltage after 2.5 second Leakage current of IG Input 5V on the IG and output High testing the leakage current during the 2.5s (according to Fig.1) TIG Tpre_1 Tpre_1.5 Tpre_2 Tpre_2.5 Ignition times Fig. 1，K1、K2 ON 1 s Preheat time of 1s K1、K2 ON、K3＝K4＝2 1 s Preheat time of 1.5s K1、K2 ON、K4＝2 1.5 s Preheat time of 2s K1、K2 ON、K3＝2 2 s Preheat time of 2.5s Fig.2，K1、K2 ON 2.5 s http://www.belling.com.cn -3Total 4 Pages 8/8/2006 BL8303 Electronic Starter Normal Ignition SD 100Hz Vp=5V, 90％ duty cycle , preheat time 2.5s ... SD SC IG Ignition Successful 2.5s Output Low 2.5s Tpre Output Low Fig. 1 Failure mode Re-ignition SD 100Hz Vp=5V, 90％ duty cycle , preheat time 2.5s ... SD SC 2.5s IG 2.5s Tpre ... 1s ... Tig 1s ... X Output Low Ignite for 8 times Fig. 2 http://www.belling.com.cn -4Total 4 Pages 8/8/2006