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industrial and multimarket data sheet rev1.0, 2012-02-28 ICL8002G led controller ic single stage pfc and fl yback led controller
edition 2012-02-28 published by infineon technologies ag 81726 munich, germany ? 2012 infineon technologies ag all rights reserved. legal disclaimer the information given in this docu ment shall in no event be regarded as a guarantee of conditions or characteristics. with respect to any examples or hints given herein, any typical values stated herein and/or any information regarding the application of the device, infine on technologies hereby disclaims any and all warranties and liabilities of any kind, including witho ut limitation, warranties of non-infrin gement of intellectua l property rights of any third party. information for further information on technology, delivery terms and conditions and prices, please contact the nearest infineon technologies office ( www.infineon.com ). warnings due to technical requirements, components may contain dangerous substances. for information on the types in question, please contact the nearest infineon technologies office. infineon technologies compon ents may be used in life-su pport devices or systems only with the express written approval of infineon technologies, if a failure of such components can reasonably be expected to cause the failure of that life-support device or system or to affect the safe ty or effectiveness of that de vice or system. life support devices or systems are intended to be implanted in the hu man body or to support an d/or maintain and sustain and/or protect human life. if they fail, it is reasonable to assume that the health of the user or other persons may be endangered.
single stage pfc and fl yback led controller ICL8002G data sheet 3 rev1.0, 2012-02-28 trademarks of infineon technologies ag aurix?, bluemoon?, c166?, ca npak?, cipos?, cipurse?, comn eon?, econopack?, coolmos?, coolset?, corecontrol?, crossave?, dave?, easypim?, econobri dge?, econodual?, econopim?, eicedriver?, eupec?, fcos?, hitfe t?, hybridpack?, i2rf?, isoface?, isopack?, mipaq?, modstack?, my-d?, novalithic?, omnitune?, optimos?, origa?, primarion?, primepack?, primestack?, pr o-sil?, profet?, rasic?, re versave?, satric?, sieget?, sindrion?, sipmos?, smarti?, smartlew is?, solid flash?, tempfet?, thinq!?, trenchstop?, tricore?, x-go ld?, x-pmu?, xmm?, xposys?. other trademarks advance design system? (ads) of agilent te chnologies, amba?, arm?, multi-ice?, keil?, primecell?, realview?, thumb?, vision? of arm limited, uk. autosar? is licensed by autosar development partnership. bluetooth? of bluetooth sig inc. cat-iq? of dect forum. colossus?, firstgps? of trimble navigation ltd. emv? of emvc o, llc (visa holdings in c.). epcos? of epcos ag. flexgo? of microsoft corp oration. flexray? is licensed by flexray consortium. hyperterminal? of hilgraeve incorporated. iec? of commission electrot echnique internationale. irda? of infrared data association corporation. iso? of international organization for standardization. matlab? of mathworks, inc. maxim? of maxim integrated products, inc. microtec?, nucleus? of mentor graphics corporation. mifare? of nx p. mipi? of mipi alliance, inc. mips? of mips technologies, inc., usa. murata? of murata manufacturing co., microwave offi ce? (mwo) of applied wave research inc., omnivision? of omnivision technologies, inc. open wave? openwave systems inc. red hat? red hat, inc. rfmd? rf micro devices, inc. sirius? of sirius sate llite radio inc. solaris? of sun microsystems, inc. spansion? of spansion llc ltd. symbian? of sy mbian software limited. taiyo yuden? of taiyo yuden co. teaklite? of ceva, inc. t ektronix? of tektroni x inc. toko? of toko kabushiki kaisha ta. unix? of x/open company limited. verilog?, palladium? of cadence design systems, inc. vlynq? of texas instruments inco rporated. vxworks?, wind river? of wind river systems, inc. zetex? of diodes zetex limited. last trademarks update 2010-10-26 revision history page or item subjects (major changes since previous revision) rev1.0,2012-02-28 ,
single stage pfc and fl yback led controller ICL8002G table of contents data sheet 4 rev1.0, 2012-02-28 table of contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 list of figures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 list of tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 1 single stage pfc and flyback led controller product highlight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2 pin configuration and functionality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2.1 pin configuration with pg-dso-8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2.2 package pg-dso-8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2.3 pin functionality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 3 representative block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 4 functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 4.1 vcc pre-charging and typical vcc voltage during start-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 4.2 soft-start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 4.3 normal operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 4.3.1 zero crossing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 4.3.2 ringing suppression time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 4.3.2.1 switch on determination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 4.3.3 switch off determination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 4.4 current limitation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 4.4.1 foldback point correction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 4.4.2 additional features in ic l8002g compare to icl8001g . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 4.5 iprotection functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 5 electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 5.1 absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 5.2 operating range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 5.3 characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 5.3.1 supply section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 5.3.2 internal voltage reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 5.3.3 pwm section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 5.3.4 current sense . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 5.3.5 soft start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 5.3.6 foldback point correction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 5.3.7 digital zero crossing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 5.3.8 protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 5.3.9 gate drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 6 outline dimension . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 3 references . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 terminology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 table of contents
single stage pfc and fl yback led controller ICL8002G single stage pfc and flyback le d controller product highlights data sheet 7 rev1.0, 2012-02-28 1 single stage pfc and flyback led controller product highlights ? primary side control significantly reduces bom enabling lo west system cost,smallest form factor and simplified design. ? advance quasi-resonant opreation for leading and traling edge dimmers ? high efficiency over wide dimming range. ? continuous dimming curve an d stabilized light output. ? enabling high pf upto 98% and low thd <10%. features ? hv startup cell for short time to light and high driver efficiency. ? digital foldback corr ection for good line regulation capability. ? precise pwm for primary pfc and dimming control. ? support various protection modes. ? digital soft-start. ? vcc over/ under-voltage protection. ? auto restart mode for short circuit protection ? cycle-by-cycle peak current limitation. description the ICL8002G is designed for the offline led lighting applicat ions with high efficiency requirements.it provides a single stage flyback and buck solution with high po wer factor correction(pfc) and dimming functionality. innovative primary side control techniques combined with accurate pwm generation for phase cut dimming which enables led lamp/luminaire with significantly reduced co mponent count for smallest form factor and simplified design. ICL8002G employs quasi-resonant operation mode optmized for leading and trailin g edge phase-cut dimmers used led lamps,tubes or down lights.dimming performanc e can be improved even further by external bleeder and damper circuitry. primary side control enables hi gh power factor >98% and low thd<10%, improving the driver efficiency significantly upto 90%. the ICL8002G has multiple safety functions that ensure a full system protection. ICL8002G represents an outstanding choice for quasi- resonant flyback and buck led lamp designs combining a taliored feature set and performance at minimum bom cost.
single stage pfc and fl yback led controller ICL8002G single stage pfc and flyback le d controller product highlights data sheet 8 rev1.0, 2012-02-28 application circuit for primary control figure 1 application circuit type package ICL8002G pg-dso-8
single stage pfc and fl yback led controller ICL8002G pin configuration and functionality data sheet 9 rev1.0, 2012-02-28 2 pin configuration and functionality 2.1 pin configurat ion with pg-dso-8 2.2 package pg-dso-8 figure 2 pin configuration pg-dso-8(top view) table 1 pin description ball no. name pin type buffer type function 1zcv?? zero crossing 2vr?? voltage sense 3cs?? current sense 4gd?? gate drive output 5hv?? high voltage input 6n.c.?? not connected 7vcc?? controller supply voltage 8gndgnd? controller ground pg _dso_8_top .vsd zcv vr cs gd gnd vcc nc hv 1 2 3 45 6 7 8
single stage pfc and fl yback led controller ICL8002G pin configuration and functionality data sheet 10 rev1.0, 2012-02-28 2.3 pin functionality zcv (zero crossing) at this pin, the voltage from the auxilia ry winding after a time delay circuit is applied. internally, th is pin is connected to the zero-crossing detector for switch-on determination. additionally, the output overvo ltage detection is realized by comparing the voltage vzc with an internal preset threshold. vr (voltage sense) the rectified input mains voltage is sens ed at this pin. the signal is used to set the peak current of the peak-current control and therefore allow for the pf c and phase-cut dimming functionality. cs (current sense) this pin is connected to the shunt resistor for the primary current sensing, externally, and the pwm signal generator for switch-off determinatio n (together with the feedback voltage), internally. moreover, short-winding protection is realised by monito ring the voltage vcs during on-time of the main power switch. gd (gate drive output) this output signal drives the external main powe r switch, which is a power mosfet in most case. hv (high voltage) the pin hv is connected to the bus vo ltage, externally, and to the power ce ll, internally. the current through this pin pre-charges the vcc capacitor with constant cu rrent once the supply bus voltage is applied. vcc (power supply) vcc pin is the positive supply of t he ic. the operating range is between v vccoff and v vccovp . gnd (ground) this is the common ground of the controller.
single stage pfc and fl yback led controller ICL8002G representative block diagram data sheet 11 rev1.0, 2012-02-28 3 representative block diagram figure 3 representative block diagram blockdiagram .vsd depl. coolmos ? startup cell power managment zero crossing current mode control gate drive protection hv gnd gd gate control voltage reference & biasing over / under- voltage lockout otp restart / latchup control vcc cs leading edge blanking vr zcv zero current detection over voltage protection softstart pwm comparator & pfc/ dimming control foldback correction short winding detection
single stage pfc and fl yback led controller ICL8002G functional description data sheet 12 rev1.0, 2012-02-28 4 functional description 4.1 vcc pre-charging and typica l vcc voltage during start-up in ICL8002G, a high voltage startup cell is integrated. as shown in figure 2, the start cell consists of a high voltage device and a controller, whereby the high voltage device is controlled by the controller. the startup cell provides a pre-charging of the vcc capa citor till vcc voltage reaches the vcc turned-on threshold v vccon and the ic begins to operate. once the mains input voltage is app lied, a rectified voltage shows across the capacitor cbus. the high voltage device provides a current to charge the vcc capacitor c vcc . before the vcc voltage reaches a certain value, the amplitude of the current through the high voltage device is only determined by its channel resistance and can be as high as several ma. after the vcc voltage is high e nough, the controller controls the high voltage device so that a constant current around 1ma is provided to charge the vcc capacitor further, until the vcc voltage exceeds the turned-on threshold v vccon . as shown as the time phase i in figure 3, the vcc voltage increase near linearly and the charging speed is independent of the mains voltage level. figure 4 vcc voltage at start up the time taking for the vcc pre-charging can then be approximately calculated as: (1) where ivcccharge2 is the charging current from the startup cell which is 1.05ma, typically. exceeds the vcc voltage the turned-on threshold v vccon of at time t1, the startup ce ll is switched off, and the ic begins to operate with a soft- start. due to power consumption of the ic an d the fact that still no energy from the auxiliary winding to charge the vcc ca pacitor before the output voltage is built up, the vcc voltage drops (phase ii). once the ou tput voltage is high en ough, the vcc capacitor receives t hen energy from the auxiliary winding from the time point t2 on. the vcc then will re ach a constant value de pending on output load. v vccon v vcc v vccoff t1 t t2 i ii iii 2 arg 1 e vccch vcc vccon i c v t ? =
single stage pfc and fl yback led controller ICL8002G functional description data sheet 13 rev1.0, 2012-02-28 4.2 soft-start at the time ton, the ic begins to operate with a soft-start. by this soft-start the switching stresses for the switch, diode and transformer are minimised. the soft-start implem ented in ICL8002G is a digital time-based function. the preset soft-start time is 12m s with 4 steps. if not limited by other functi ons, the peak voltage on cs pin will increase step by step from 0.32 v to 1 v finally. figure 5 maximum current sense voltage during softstart 4.3 normal operation the pwm controller during normal operation consists of a digital signal processing circuit including a comparator, and an analog circuit including a current measurement unit and a comparator. the switch-on and -off time points are each determined by the digital circuit and the analog circuit, respectively. as inpu t information for the switch- on determination, the zero-crossing input signal is ne eded, while the voltages sense signal at pin vr and the current sensing signal v cs are necessary for the switch -off determination. details about the full operation of the pwm controller in normal operation are illustrated in the following paragraphs. 4.3.1 zero crossing in the system, the voltage from the auxiliary winding is applied to the ze ro-crossing pin through a rc network, which provides a time delay to the volt age from the auxiliary wind ing. internally, this pin is connected to a clamping network, a zero-crossing detector, an output overvoltag e detector and a ringing suppression time controller. during on-state of the power switch a negative voltage applies to the zcv pin. through the internal clamping network, the voltage at th e pin is clamped to -0.3v. the voltage v zc is also used for the output over voltage protection. once the voltage at this pin is higher than the threshold v zcovp during off-time of the main switch, the ic is latched off after a fixed blanking time. to achieve the switch-on at voltage va lley, the voltage from the auxiliary wind ing is fed to a time delay network (the rc network consists of dzc, rzc1 , rzc2 and czc as shown in typical applic ation circuit) before it is applied to the zero-crossing detector through the zc pin. the needed time delay to the main oscillation signal dt should be approximately o ne fourth of the oscillation pe riod (by transformer primary induc tor and drain-source capacitor) t on 36912 0. 32 0. 49 0. 66 0. 83 1. 00 vcs_sst (v) time(ms)
single stage pfc and fl yback led controller ICL8002G functional description data sheet 14 rev1.0, 2012-02-28 minus the propagation delay from thedetected zero-cro ssing to the switch-on of the main switch tdelay, theoretically: (2) this time delay should be matched by adjusting the time constant of the rc network which is calculated as: (3) 4.3.2 ringing suppression time after mosfet is turned off, there will be some oscillation on vds, which w ill also appear on the voltage on zc pin. to avoid that the mosfet is tu rned on mistriggerred by such oscilla tions, a ringing suppression timer is implemented. the timer is dependent on the voltage v zc . when the voltage v zc is lower than the threshold v zcrs , a longer preset time applies, while a shorter time is set when the voltage v zc is higher than the threshold. 4.3.2.1 switch on determination after the gate drive goes to low, it can not be changed to high during ring suppression time. after ring suppression time, the gate drive can be turned on when the zero crossing is detected. however, it is also possib le that the oscillation betw een primary inductor and drain-source capacitor damps very fast and ic can not detect a zero cros sing. in this case, a maximum off time is implemented. after gate drive has been remained off for the period of t offmax , the gate drive will be turned on ag ain regardless. th is function can effectively prevent the switching freq uency from going lower than 20khz, ot herwise which will cause audible noise, during start up. 4.3.3 switch off determination in the converter system, the primary current is sensed by an external shunt resistor, which is connected between low-side terminal of the main powe r switch and the common ground. the s ensed voltage across the shunt resistor v cs is applied to an internal current measurement unit, and its output voltage v1 is compared with the voltage at pin vr. once the voltage v1 exceeds the voltage v vr , the output flip-flo p is reset. as a resu lt, the main power switch is switched off. the rela tionship between the v1 and the v cs is described by: (4) to avoid mistriggering caused by the voltage spike across the shunt resistor at the turn on of the main power switch, a leading edge blanking time, t leb , is applied to the output of the comparator. in other words, once the gate drive is turned on, the minimum on time of the gate drive is the leading edge blanking time. in addition, there is a maximum on time, t onmax , limitation implemented in the ic. once the gate drive has been in high state longer than the maximum on time, it will be turned off to prevent the swit ching frequency from going too low because of long on time. delay osc t t t ? = 4 2 1 2 1 zc zc zc zc zc td r r r r c + ? ? = 7 . 0 3 . 3 1 ? cs v v
single stage pfc and fl yback led controller ICL8002G functional description data sheet 15 rev1.0, 2012-02-28 4.4 current limitation there is a cycle by cycle current limitation realized by th e current limit comparator to provide an overcurrent detection. the source current of the mosfet is sensed via a sense resistor rcs. by means of rcs the source current is transformed to a sense voltage v cs which is fed into the pin cs. if the voltage v cs exceeds an internal voltage limit, adjusted acco rding to the mains voltage, the comparat or immediately turns off the gate drive. to prevent the current limitation process from distor tions caused by leading edge spikes, a leading edge blanking time ( t leb ) is integrated in the current sensing path. a further comparator is implemented to detect dangerous current levels (v cssw ) which could occur if one or more transformer windings are shorted or if the secondary diode is s horted. to avoid an accidental latch off, a spike blanking time of tcssw is integrated in the output path of the comparator. 4.4.1 foldback point correction when the main bus voltage increases, the switch on time becomes shorter and therefore the operating frequency is also increased. as a result, for a constant primary cu rrent limit, the maximum possible output power is increased, which the converter may have not been designed to support. to avoid such a situation, the internal foldback point correction circuit varies the v cs voltage limit according to the bus voltage. this means the v cs will be decreased when the bus voltage in creases. to keep a constant maximum input power of the converter, the required maximum v cs versus various input bus volt age can be calculated, which is shown in figure 6 . figure 6 variation of the vcs limit voltage according to the izc current 0.6 0.7 0.8 0.9 1 80 100 120 140 160 180 200 220 240 260 280 300 320 340 360 380 400 vcs-max(v) vin(v)
single stage pfc and fl yback led controller ICL8002G functional description data sheet 16 rev1.0, 2012-02-28 according to the typical application circuit, when mosfet is turned on, a negative voltage proportional to bus voltage will be coupled to auxiliary wind ing. inside icl8 002g, an internal circuit will clamp the voltage on zc pin to nearly 0 v. as a result, the current flowing out from zc pin can be calculated as (5) when this current is higher than izc_1, the amount of current exceeding this threshold is used to generate an offset to decrease the maximum limit on v cs . since the ideal curve shown in figure 6 is a nonlinear one, a digital block in ICL8002G is implemented to get a better control of maximum output power. additional advantage to use digital circuit is the production tolera nce is smaller compared to analog so lutions. the typical maximum limit on v cs versus the zc current is shown in figure 7 . figure 7 vcs-max versus izci 4.4.2 additonal features in ICL8002G compare to icl8001g 1) new valley switching sheme whic h minimizes light shimmer effect. 2) helps for the continous dimming curve for smooth dimming. 3) internal hold-up resistor value has been increased for better shaping of the input current. 4) better shaping of the input current results in high pfc and stable dimming at higher led current precision. 5) better pfc leads to lowe r thd operation to meet the en standards for hormonics. p zc a bus zc n r n v i 1 = vcs-max(v) izc(ua)
single stage pfc and fl yback led controller ICL8002G functional description data sheet 17 rev1.0, 2012-02-28 4.5 iprotection functions the ic provides full protection functions. the follo wing table summarizes thes e protection functions. during operation, the vcc voltage is co ntinuously monitored. in case of an under- or an over-voltage, the ic is reset and the main power switch is then kept off. after the vcc voltage falls below the threshold v vccoff , the startup cell is activated. the vcc capacitor is then charged up. once the voltage exceeds the threshold v vccon , the ic begins to operate with a new soft-start. during off-time of the power switch, the voltage at th e zero-crossing pin is monitored for output over-voltage detection. if the voltage is hi gher than the preset threshold v zcovp , the ic is latched off after the preset blanking time. there is also the overvoltage protection being implemented at vr, when this voltage exceeds v vrovp , the device goes into auto restart mode. if the junction temperature of ic exceeds 140 0 c, the ic enter into autorestart mode. if the voltage at the current sensing pi n is higher than the preset threshold v cssw during on-time of the power switch, the ic is latched off. th is is short-winding protection. during latch-off protection mode, when the vcc voltage drops to 10.5 v,the startup cell is activated and the vcc voltage is charged to 18 v then the startup cell is shut down again and repeat s the previous procedure. there is also a maximum on time limitation inside ic l8002g. once the gate voltage is high longer than t onmax , it is turned off immediately. table 2 protection features vcc overvoltage auto restart mode vcc undervoltage auto restart mode over temperature auto restart mode output overvoltage latched off mode short winding latched off mode
single stage pfc and fl yback led controller ICL8002G electrical characteristics data sheet 18 rev1.0, 2012-02-28 5 electrical characteristics note: all voltages are measured with respect to ground (pin 8). the voltage levels are valid if other ratings are not violated. 5.1 absolute maximum ratings note: absolute maximum ratings are defi ned as ratings, which when being exceeded may lead to destruction of the integrated circuit. for the same reason make sure , that any capacitor that will be connected to pin 7 ( v cc ) is discharged before assembling the application circuit. 5.2 operating range note: within the operating range the ic operates as described in the functional description. table 3 absolute maximum ratings parameter symbol values unit note / test condition min. max. hv voltage v hv ?500v vcc supply voltage v vcc -0.3 27 v vr voltage v vr -0.3 5.0 v zcv voltage v zc -0.3 5.0 v cs voltage v cs -0.3 5.0 v gd voltage v out -0.3 27 v maximum current out from zc pin i zcmax 3?ma junction temperature t j -40 150 c storage temperature t s -55 150 c thermal resistance junction - ambient r thja ? 185 k/w pg-dso-8 esd capability (incl. drain pin) v esd ? 2 kv human body model 1) 1) according to eia/jesd22-a114-b (discharging a 1 00pf capacitor through a 1.5 kohm series resistor). table 4 operating range parameter symbol values unit note / test condition min. typ. max. vcc supply voltage v vcc v vccoff ? v vccop v junction temperature of controller t j con -25 ? 130 c t j con < t j , limited by over temperature protection
single stage pfc and fl yback led controller ICL8002G electrical characteristics data sheet 19 rev1.0, 2012-02-28 5.3 characteristics 5.3.1 supply section note: the electrical characteristics involve the spread of values within the specified supply voltage and junction temperature range t j from ? 25 c to 130 c. typical values represent the median values, which are related to 25 c. if not otherwise stated, a supply voltage of v cc = 18 v is assumed. 5.3.2 internal voltage reference table 5 supply section parameter symbol values unit note / test condition min. typ. max. start up current i vccstart ? 300 550 a v vcc = v vccon -0.2 v vcc charge current i vcccharge1 ?5.0?ma v vcc =0v i vcccharge2 0.8 ? ma v vcc =1v i vcccharge3 ?1.0?ma v vcc = v vccon -0.2 v maximum input curr ent ofstartup cell and coolmos? i drainin ??2ma v vcc = v vccon -0.2 v leakage current ofstartup cell i startleak ?0.250a v hv = 610 v at t j = 100c supply current in normal operation i vccnm ?1.52.3ma v vr= 0 v and no switching supply current in auto restart mode with inactive gate i vccar ?300?a i vr =0a supply current in latch-off mode i vcclatch ?300?a vcc turn-on threshold v vccon 17.0 18.0 19.0 v vcc turn-off threshold v vccoff 9.8 10.5 11.2 v vcc turn-on/off hysteresis v vcchys ?7.5?v table 6 internal vo ltage reference parameter symbol values unit note / test condition min. typ. max. internal reference voltage v ref 4.80 5.00 5.20 v measured at pin vr i vr =0
single stage pfc and fl yback led controller ICL8002G electrical characteristics data sheet 20 rev1.0, 2012-02-28 5.3.3 pwm section 5.3.4 current sense 5.3.5 soft start table 7 pwm section parameter symbol values unit note / test condition min. typ. max. vr refrence pull-up resistor r vr 76 100 150 k ? pwm-op gain g pwm 3.23 3.3 3.33 ? offset for voltage ramp v pwm 0.636 0.7 0.786 v maximum on time in normal operation t onmax 22 30 41 s table 8 current sense parameter symbol values unit note / test condition min. typ. max. peak current limit ation in normal operation v csth 0.97 1.03 1.09 v leading edge blanking time t leb 200 330 460 ns table 9 soft start parameter symbol values unit note / test condition min. typ. max. soft-start time t ss 8.5 12 ? ms soft-start time step t ss_s 1) 1) the parameter is not subjected to producti on test - verified by design/characterization ?3?ms internal regulation voltage at first step v csth 1) ?1.76?v internal regulation voltage step at soft start v csth 1) ?0.56?v
single stage pfc and fl yback led controller ICL8002G electrical characteristics data sheet 21 rev1.0, 2012-02-28 5.3.6 foldback point correction 5.3.7 zero crossing table 10 foldback point correction parameter symbol values unit note / test condition min. typ. max. zcv current first step threshold i zc_fs 0.35 0.5 0.621 ma zcv current last step threshold i zc_ls 1.3 1.7 2.2 ma cs threshold minimum v csmf ?0.66?v i zc =2.2ma, v vr =3.8v table 11 zero crossing parameter symbol values unit note / test condition min. typ. max. zero crossing threshold voltage v zcct 50 100 170 mv ringing suppression threshold v zcrs ?0.7?v minimum ringing suppression time t zcrs1 1.62 2.5 4.5 s v zc > v zcrs maximum ringing suppression time t zcrs2 ?25?s v zc < v zcrs maximum restart time in normal operation t offmax 30 42 57.5 s
single stage pfc and fl yback led controller ICL8002G electrical characteristics data sheet 22 rev1.0, 2012-02-28 5.3.8 protection note: the trend of all the vo ltage levels in the control unit is the same regarding the deviation except vvccovp 5.3.9 gate drive table 12 protection parameter symbol values unit note / test condition min. typ. max. vcc overvoltage threshold v vccovp 24.0 25.0 26.0 v output overvoltage detection threshold at the zcv pin v zcovp 3.55 3.7 3.84 v overvoltage protection threshold at the vr pin v vrovp 4.5 v overvoltage protection threshold blanking time at vr pin t ovp_b 20 30 44 ms blanking time for output overvoltage protection t zcovp ?100?s threshold for short winding protection v cssw 1.63 1.68 1.78 v blanking time for short-windding protection t cssw ?190?ns over temperature protection 1) 1) the parameter is not subjected to producti on test - verified by design/characterization t jcon 130 140 150 c table 13 gate drive parameter symbol values unit note / test condition min. typ. max. output voltage at logic low v gatelow ??1.0v v vcc =18v i out =10ma output voltage at logic high v gatehigh 9.0 10.0 ? v v vcc =18v i out =-10ma output voltage active shut down v gateasd ??1.0v v vcc =7v i out =10ma rise time t rise ?117?ns c out =1.0nf v gate =2v...8v fall time t fall ?27?ns c out =1.0nf v gate =8v...2v
single stage pfc and fl yback led controller ICL8002G outline dimension data sheet 23 rev1.0, 2012-02-28 6 outline dimension figure 8 pg-dso-8 (pb-free lead plating plastic dual small outline) dimensions in mm.
published by infineon technologies ag www.infineon.com

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