SEMICONDUCTOR KIA3502P TECHNICAL DATA BIPOLAR LINEAR INTEGRATED CIRCUIT 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. ・Internal Soft-Start ・Programmable Preheating Frequency ・Programmable Preheating Time ・Programmable Ignition Time ・Very Precision Internal Operating Frequency(±5%) ・No Lamp Protection or Over Current Protection ・Built-in Temperature Compensation Circuit ・Built-in Surge Protection Circuit ・Built-in UVLO Circuit ・Precision Internal Reference Voltage ・DIP-8, FLP-8 Package INTERNAL CIRCUIT BLOCK. 2011. 6. 8 Revision No : 0 1/9 KIA3502P Fig1. PIN CONNECTIONS 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 IPEAK ±1 A Pd 800 mW VIN -0.4 ~ 6 V ICLAMP 30 mA Tj -25~125 Tstg -55~150 Totem-pole Output Peak Current Power Dissipation(8DIP) PIN1,2,3,4, Voltage Output Clamp Diode Current Operating Junction Temperature Storage Temperature 2011. 6. 8 Revision No : 0 2/9 KIA3502P ELECTRICAL CHARACTERISTICS (Ta=25℃, VCC=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 fosc=47KHz, Co=1nF 4 9 14 mA Vcc Increasing 9 10 11 V 1.5 2 2.5 V Operating Supply Current ICC Under Voltage Lock Output Section Vcc Tum-On Voltage VCCON UVLO Hysteresis Voltage HYS - 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 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=Open 3.2 3.7 4.2 V 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 MIN. TYP. MAX. UNIT Preheating Section (Pin3, Pin4) Pin4(CPH) High Clamp Voltage VPHT(H) Pin3(PHF)Reference Voltage ELECTRICAL CHARACTERISTICS (Continued) (Ta=25℃, VCC=14V, fosc=47KHz, unless otherwise specified.) CHARACTERISTIC SYMBOL CONDITIONS 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 VIGN(H) Pin4=Open 3.8 4.3 4.8 V Output High Voltage VOH Io=-100mA 11 12 - V Output Low Voltage VOL Io=100mA - 0.9 1.4 V Pin1(CIGN) High Clamp Voltage Output Section Output Maximum Voltage Output Voltage With UVLO Activated VHOMAX Vcc=20V, No Load 13 15 17 V 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 - - * 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. 2011. 6. 8 Revision No : 0 3/9 KIA3502P Fig2. OPERATING TIMING CHART fph : Preheating Frequency (Rph) fop : Operating Frequency(CT) Tph : Preheating Time (Cph) Tign : Ignition Time (Cign) 2011. 6. 8 Revision No : 0 4/9 KIA3502P Fig3. APPLICATION INFORMATIONS 1. Operating frequcncy Charging_time : Tchg= CT × Vchg_pp Discharging_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 Ichg Tatal_period : T = Tchg+Tdis 1 1 1 1 × = × 2 2 Total_Period Tchg+Tolis Operating_Frequcncy(fo)= Final formula -5 Frequency : fo=(10.35×10 ) × 1 CT Example) CT=220pF -6 ∴fo=10.35×10 × 1 = 47KHz 220×10 -12 2. Preheating frequency PreheatingCharging_time : Tchg_ph = CT × Vchg_pp PreheatingDischarging_time : Tdis_ph = 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_ph_pp Vchg_pp Idis_ph PreheatingTotal_period : Tph = Tchg_ph+Tdis_ph PreheatingFrequency(fph) = 1 1 1 1 × = × 2 2 PreheatingTotal_Period Tchg_ph+Tdis_ph Final formula ∴fph =0.1375× 2.0 1 ) × (78uA+ CT Rph Example) CT=220pF, Rph=27K ohm ∴fo=0.1375× 2011. 6. 8 2.0 1 2.0 1 ) =0.1375× ) =95KHz × (78×10 + × (78×10 + CT Rph 27×10 220×10 -6 -6 -12 Revision No : 0 3 5/9 KIA3502P APPLICATION INFORMATIONS (Continued) 3. Preheating Time Preheating_Time : Tph= Cph × Vph Iph CT : Pin2 Capacitor Vph : Constant Voltage (Internally fixed) Iph : Constant current (Internally fixed) 6 Preheating_Time : Tph= 1.25×10 ×Cph Example) Cph=0.33uF 6 -6 ∴Tph = 1.25 ×10 ×0.33×10 = 413ms 4. Ignition Time Cign × Vign Ignition_Time : Tign= Iign Cign : Pin1 Capacitor Vign : Constant Voltage (Internally fixed) Iign : Constant current (Internally fixed) 3 Ignition_Time : Tign = 0.182×10 ×Cign Example) Cign=47nF 6 -9 ∴Tign = 0.182 ×10 ×47×10 = 8.5ms 2011. 6. 8 Revision No : 0 6/9 KIA3502P Fig4. TEST CIRCUIT 2011. 6. 8 Revision No : 0 7/9 KIA3502P 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 Revision No : 0 8/9 KIA3502P 2011. 6. 8 Revision No : 0 9/9