IP3101 september. 2003 - 1 - http://www.interpionsemi.com versatile gate driver the IP3101 provides simple and high performance control functions for the half bridge l/c resonant sys- tem, specially electronic ballast . it internally inte- grated the essential functions of the half bridge l/c resonant system so the conventional system can be realized a minimum board area, small external com- ponents and low power dissipation. internally integrated soft-start circuit eliminated the need for external soft-start circuit. and the initial pre- heating switching frequency and preheating time can be easily programmable with only one capacitor (preheating frequency capacitor) and one resistor (preheating time capacitor) depending on the types of lamps. also the normal operating frequency can be easily adjusted by timing resistor (rt) and timing ca- pacitor (ct). the cold cathode current can be limited by changing the normal operating frequency to soft-start frequency with an external small signal transistor. no lamp pro- tection or any required protection like over current protection can be realized by adding an external small signal transistor. - internal soft start - programmable soft start frequency - programmable preheating time - very precision internal operating frequency(+ 5%) - no lamp protection or over current protection - precision internal reference voltage - 8dip, 8sop packages device package operating temp IP3101 8dip i3101 8sop -25 c ~ 125 c descriptions block diagram order informations features 8sop 8dip vcc vcc output logic oscillator shutdown uvlo (10v/8v) 6 7 8 pre-heat oscillator reference output uvlo 5 1 4 3 i(ct) i(ct)=i(rt)+i(phf) ichg idis i(rt) i(phf) phf rt 2 ct pht gnd lo ho vcc voltage reference (vz,vref) vz ipht iss 1.0v protection comparator delay timer osc, pht, ho,lo iss 1.5v
IP3101 september. 2003 - 2 - http://www.interpionsemi.com versatile gate driver no symbol i/o description 1 pht i preheating time & soft-start time control pin with capacitor 2 ct i internal oscillator timing control pin with capacitor 3 rt i internal oscillator timing control pin with resister 4 phf i preheating frequency & soft-start frequency control pin with resister 5 gnd - ground 6 lo o low side gate drive output 7 ho o high side gate drive output 8 vcc - supply voltage pin descriptions pin connections characteristics symbol value unit maximum supply voltage vccmax 30 v maximum operating supply voltage vopmax 24 v totem-pole output peak current ipeak 300 + ma 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 c storage temperature tstg -65 ~ 150 c absolute maximum ratings
IP3101 september. 2003 - 3 - http://www.interpionsemi.com versatile gate driver electrical characteristics characteristics 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=46khz, co=1nf 4 9 14 ma under voltage lock output section vcc turn-on voltage vccon vcc increasing 9 10 11 v uvlo hysteresis voltage hys 1.5 2 2.5 v preheating (soft start) section pht charging current ipht pin1=0v 0.7 0.9 1.1 ua pht threshold voltage vpht pin1 increasing, rphf=33k 1.2 1.5 1.8 v phf reference voltage vphf iphf=100ua 1.95 2.00 2.05 v phf reference voltage line regulation dvphf1 vcc=12~20v -6 0.1 6 mv phf reference voltage load regulation dvphf2 io=50ua~200ua -12 -0.1 12 mv protection input threshold voltage vprot pin4=from 2.0v to 0v 0.7 1.0 1.3 v protection triggering cur- rent iprot pin4=0v - -1 - ma phf maximum current iphf vphf=1.5v 200 - - ua protection section (ta = 25 c, vcc=14v, fosc=46khz, unless otherwise specified.)
IP3101 september. 2003 - 4 - http://www.interpionsemi.com versatile gate driver electrical characteristics (continued) characteristics symbol conditions min typ max unit oscillator section rt reference voltage vrt irt=100ua 1.95 2.00 2.05 v rt short to gnd current iscrt pin3=0v 1 2 - ma rt reference line regula- tion dvrt1 vcc=12v~20v -6 0.1 6 mv rt reference load regu- lation dvrt2 io=100ua~500ua -12 -0.1 12 mv soft start output fre- quency fpht11 pin1=0v,rphf=33k , ct=470pf, rt=20k 61 68 75 khz operating frequency note fosc1 pin1=5v, rphf=33k , ct=470pf, rt=20k 43 46 49 khz frequency variation with vcc dvfsc1 vcc=14v~24v - 0.01 - % dead time td pin1=5v, rphf=33k , ct=470pf, rt=20k 1.15 1.75 2.35 us output high voltage 11 voh11 io = -10ma 11 12 13 v output high voltage 12 voh12 io = -100ma 10.5 11.5 12.5 v output low voltage 21 vol21 io = 10ma 0 0.05 0.4 v output low voltage 22 vol22 io = 100ma 0.05 0.4 1.2 v output maximum voltage vhomax vcc=20v, no load 11 14 17 v output voltage with uvlo activated vuv vcc=5v, io=100ua - 0.6 1 v output section * note : fosc (operating frequency) is the half of oscillator frequency.
IP3101 september. 2003 - 5 - http://www.interpionsemi.com versatile gate driver application informations 1. calculation for v pht the v pht is voltage of pin 1. the preheating time is decided by this voltage. where, r phf is the value of resistor which is connected to pin 4. 2. calculation for t ph the t ph is preheating time, from preheating frequency to normal operating frequency. when the voltage of pin 1 reach to the v pht , the preheating will be completed. where, c pht is the value of capacitor which is connected to pin 1. 3. calculation for f sw the f sw is normal operating frequency. where, ct & rt are the value of capacitor & resistor which are connected to pin 2 & pin 3. 4. calculation for f prh the f prh is preheating frequency. 05 . 0 44000 + = phf pht r v pht pht ph v c t = - 6 10 9 . 0 t t sw c r f @ 2 . 2 1 phf t t phf t prh r c r r r f + @ 5 . 2
IP3101 september. 2003 - 6 - http://www.interpionsemi.com versatile gate driver operation timing chart
IP3101 september. 2003 - 7 - http://www.interpionsemi.com versatile gate driver test circuits typical application circuits
IP3101 september. 2003 - 8 - http://www.interpionsemi.com versatile gate driver package dimensions
IP3101 september. 2003 - 9 - http://www.interpionsemi.com versatile gate driver package dimensions
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