2011. 6. 8 1/9 semiconductor technical data KIA3502P bipolar linear integrated circuit revision no : 0 simple ballast controller descriptions. the kia3502 provides simple and high performance control functions for the half vridge l/c resonant system, specially electronic ballast. it internally integrated the essential functions of the half bridge l/c resonant system so the conventional system can be realized a minimum board area, small external components and low power dissipation. internally integrated soft-start circuit eliminated the need for external soft-start circuit. preheating time, preheating frequency, operating frequency and ignition time can be controlled. separately using external capacitors and resistor. no lamps protection or any required protection like over current protection can be realized an external small signal transistor. features. h internal soft-start h programmable preheating frequency h programmable preheating time h programmable ignition time h very precision internal operating frequency( ? 5%) h no lamp protection or over current protection h built-in temperature compensation circuit h built-in surge protection circuit h built-in uvlo circuit h precision internal reference voltage h dip-8, flp-8 package internal circuit block.
2011. 6. 8 2/9 KIA3502P revision no : 0 pin descriptions no symbol i/o description 1 cign i ignition time control pin with external capacitor 2 ct i internal oscillator timing control pin with capacitor 3 rphf i preheating frequency control pin with external resistor 4 cph i preheating time control pin with external capacitor 5 gnd - ground 6 lo o low side gate drive output 7 ho o high side gate drive output 8 vcc - supply voltage absolute maximum ratings characteristics symbol value unit maximum supply voltage vccmax 30 v maximum operating supply voltage vopmax 24 v totem-pole output peak current ipeak ? 1 a power dissipation(8dip) pd 800 mw pin1,2,3,4, voltage vin -0.4 ~ 6 v output clamp diode current iclamp 30 ma operating junction temperature tj -25~125 storage temperature tstg -55~150 fig1. pin connections
2011. 6. 8 3/9 KIA3502P revision no : 0 electrical characteristics (ta=25 ? , v cc =14v, fosc=47khz, unless otherwise specified.) characteristic symbol conditions min. typ. max. unit total supply current section start-up current ist vcc=9v - 125 250 ua quiescent current iq not switching 3 7.5 12 ma operating supply current icc fosc=47khz, co=1nf 4 9 14 ma under voltage lock output section vcc tum-on voltage vccon vcc increasing 9 10 11 v uvlo hysteresis voltage hys - 1.5 2 2.5 v oscillator section operating frequency fop ct = 220pf 42 47 52 khz output delay time td pin1=pin4=3v 1 1.75 2.35 us preheating frequency fph pin4=0v, rphf=27k 66 78 90 khz output preheating delay time tpd pin4=0v 0.6 1 1.4 us preheating section (pin3, pin4) pin4(cph) threshold voltage vph pin4 voltage increasing, rphf=27k 1.8 2.0 2.2 v pin4(cph) charging current iph pin4=0v -1.9 -1.6 -1.3 ua pin4(cph) high clamp voltage vpht(h) pin4=open 3.2 3.7 4.2 v pin3(phf)reference voltage vphf iphf=-100ua 1.95 2.00 2.05 v pin3(phf) reference voltage line regulation dvphf1 vcc=14~20v -6 0.1 6 mv pin3(phf) reference voltage load regulation dvphf2 io=-50ua ~ -200ua -12 -0.1 12 mv electrical characteristics (continued) (ta=25 ? , v cc =14v, fosc=47khz, unless otherwise specified.) * note 1 : output frequency is half of the internal oscillator frequency. * note 2, note 3 : this characteristics can be guaranteed but not tested in final test step. characteristic symbol conditions min. typ. max. unit ignition section (pin1) pin1(cign) threshold voltage vign pin4 voltage increasing, rphf=27k 1.8 2.0 2.2 v pin1(cign) charging current iign pin4=0v -14 -11 -8 ua pin1(cign) high clamp voltage vign(h) pin4=open 3.8 4.3 4.8 v output section output high voltage voh io=-100ma 11 12 - v output low voltage vol io=100ma - 0.9 1.4 v output maximum voltage vhomax vcc=20v, no load 13 15 17 v output voltage with uvlo activated vuv vcc=5v, io=100ua - 0.2 1 v thermal shut down protection thermal shut down (note2) ttsd - - 175 - - thermal shut down hysteresis (note3) thys - - 20 - -
2011. 6. 8 4/9 KIA3502P revision no : 0 fig2. operating timing chart fph : preheating frequency (rph) fop : operating frequency(ct) tph : preheating time (cph) tign : ignition time (cign)
2011. 6. 8 5/9 KIA3502P revision no : 0 fig3. application informations final formula example) ct=220pf 47khz frequency : fo=(10.35 ? 10 -5 ) ? ct 1 ? fo=10.35 ? 10 -6 ? 220 ? 10 -12 1 = ? total_period 1 2 1 ? tchg+tolis 1 2 1 1. operating frequcncy charging_time : tchg= ct : pin2 capacitor vchg_pp : amplitude of the internal oscillator ichg : charging current (internally fixed) idis : discharging current (internally) ichg ct ? vchg_pp discharging_time : tchg= tatal_period : t = tchg+tdis ichg ct ? vchg_pp operating_frequcncy(fo)= = ? total_period 1 2 1 ? tchg+tolis 1 2 1 final formula example) ct=220pf, rph=27k ohm ct : pin2 capacitor vchg_pp : amplitude of the internal oscillator (when preheation) ichg : charging current (internally fixed when preheating) idis : discharging current (internally when preheating) ichg ct ? vchg_pp ? fph =0.1375 ? (78ua+ ) ? ct 1 rph 2.0 (78 ? 10 -6 + ) ? ct 1 rph 2.0 (78 ? 10 -6 + ) ? 27 ? 10 3 2.0 220 ? 10 -12 1 ? fo=0.1375 ? =0.1375 ? =95khz ct ? vchg_pp ? 1 2 1 2. preheating frequency preheatingcharging_time : tchg_ph = preheatingdischarging_time : tdis_ph = preheatingtotal_period : tph = tchg_ph+tdis_ph idis_ph ct ? vchg_ph_pp preheatingfrequency(fph) = preheatingtotal_period = ? tchg_ph+tdis_ph 1 2 1
2011. 6. 8 6/9 KIA3502P revision no : 0 application informations (continued) ct : pin2 capacitor vph : constant voltage (internally fixed) iph : constant current (internally fixed) iph cph ? vph 3. preheating time preheating_time : tph= preheating_time : tph= 1.25 ? 10 6 ? cph example) cph=0.33uf ? tph = 1.25 ? 10 6 ? 0.33 ? 10 -6 = 413ms cign : pin1 capacitor vign : constant voltage (internally fixed) iign : constant current (internally fixed) iign cign ? vign 4. ignition time ignition_time : tign= ignition_time : tign = 0.182 ? 10 3 ? cign example) cign=47nf ? tign = 0.182 ? 10 6 ? 47 ? 10 -9 = 8.5ms
2011. 6. 8 7/9 KIA3502P revision no : 0 fig4. test circuit
2011. 6. 8 8/9 KIA3502P revision no : 0 fig5. typical application circuit cign : ignition timing capacitor ct : oscillator timing capacitor rph : pre-heating timing resistor cph : pre-heating timing capacitor
2011. 6. 8 9/9 KIA3502P revision no : 0
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