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hr2000 fluorescent lamp hb driver with pfc hr2000 rev. 1.0 www.monolithicpower.com 1 2/20/2013 mps proprietary information. patent prote cted. unauthorized photocopy and duplication prohib ited. ? 2013 mps. all rights reserved. the future of analog ic technology description the hr2000 is a fluorescent lamp ballast controller with pfc function and high voltage halfbridge driver. only 16pin is used to offer cost effective solutions with minimized external components. the hr2000 can properly drive the two mosfets of halfbridge to control fluorescent lamp, ensuring all the features at the same time. the operating frequency is programmable and the sweeping frequency is controlled to limit the preheat current. the preheat time and ignition time can be smartly set up for types of lamps and applications. sufficient protection functions are provided for different fault modes such as over voltage, over current, over temperature, capacitive mode, end of life (eol). preheat driving signal is offered in preheat state to meet low power loss application which usually needs a mosfet to cut off filament transformer. the pfc part only uses 4 pins to realize pfc function with ontime (ton) control at boundary conduction mode (bcm). it is suitable for wide input range. over voltage protection and over current protection are integrated for the pfc part. the hr2000 is available in the 16pin soic16 package. features pfc part ? only four pins realize pfc function. ? ton control. ? boundary conduction mode operation. ? less peripheral components. ? over voltage and over current protection. half-bridge part ? 600v bootstrap halfbridge driver. ? programmable preheat current. ? programmable preheat time. ? programmable ignition time. ? single ignition attempt. ? over voltage protection. ? over current protection. ? endoflife protection ? capacitive mode protection. ? minimized external components. ? over temperature protection applications ? tube fluorescent lamp ballast ? compact fluorescent lamp ballast all mps parts are lead free and adhere to the rohs directive. for mps green status, please visit mps website under quality assu rance. mps and the future of analog ic technology are registered trad emarks of monolithic power systems, inc.
hr2000 fluorescent lamp hb driver with pfc hr2000 rev. 1.0 www.monolithicpower.com 2 2/20/2013 mps proprietary information. patent prote cted. unauthorized photocopy and duplication prohib ited. ? 2013 mps. all rights reserved. typical application 12 3 4 5 6 7 8 9 10 11 12 13 14 15 16 zcd ovc ct fc cp/eol ref pre/ft bst sw ug cs lg vcc gnd gate d101 d105 d106 q101 c102 q201 q202 l201 c205 c206 c207 r202 c209 c211 * * r101 r105 r106 r107 r204 r205 r203 r208 r209 r206 hr2000 d102 d104 d103 c101 t101 c103 d107 r102 r103 r104 r108 r109 r110 c104 c201 c202 c203 r201 c208 c210 c212 c213 r207 d201 d202 z201 lamp mains vo c204 r111 d203 figure 1
hr2000 fluorescent lamp hb driver with pfc hr2000 rev. 1.0 www.monolithicpower.com 3 2/20/2013 mps proprietary information. patent prote cted. unauthorized photocopy and duplication prohib ited. ? 2013 mps. all rights reserved. ordering information part number* package top marking HR2000GS soic16 hr2000 * for tape & reel, add suffix Cz (e.g. HR2000GSCz). package reference hr2000 soic16 package (top view) 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 ct fc cp/eol ref ovc pre/ft vo zcd gate gnd vcc lg cs bst sw ug
hr2000 fluorescent lamp hb driver with pfc hr2000 rev. 1.0 www.monolithicpower.com 4 2/20/2013 mps proprietary information. patent prote cted. unauthorized photocopy and duplication prohib ited. ? 2013 mps. all rights reserved. limiting value (1) condition symbol min. max. unit a high side floating supply voltage operation vbst 6 30 v b voltage at sw vsw 3 630 v c voltage at pin cs note7 vcs 0.5 v be v d current in pin cs t<1.0 s, note4 ics 10 10 ma e voltage at pin ug note7 v u g vswv be v bst v f voltage at pin lg note7 v lg v be vvcc v g low voltage supply t<0.5s over lifetime vvcc 0 15 v h low voltage supply vvcc 0 14 v i clamp current in pin vcc in fault state ivcc 5 m a i voltage at pin zcd vzcd 7 7 v j voltage at pin ovc v ovc 0 5 v k current in pin vo vvcc=0 to vvccmax ivo 0 200 a l current in pin ct vvcc=0 to vvccmax i ct 0 200 a m current in pin cp/eol vvcc=0 to vvccmax note9 i eol 1 1 ma n slew rate at pins sw,hg and bst with respect to ground sr 4 4 v/ns o junction temperature tj 150 c p ambient temperature tamb 40 125 c q storage temperature tstg 55 150 c r hbm electrostatic handling voltage sw,hg,bst,vcc and lg vo, ovc, ct, fc, cp/eol, ref, pre/ft, cs, zcd, gate note5 vesd(hbm) 2000 v v s mm electrostatic handling voltage pins pre/ft note6 vesd(mm) 150 v pins vo, ovc, ct, fc, cp/eol, ref, cs, zcd, gate, sw,hg,bst,vcc and lg 200 v t charge coupling at pins ref and ct operating qcoupl 8 8 pc u reference resistor r ref 36 91 k recommended operating conditions (3) supply voltage vcc ........................ 10v to 12v analog inputs and outputs ............ 0.3v to 6.5v operating junction temp (t j ) . 40c to + 125c thermal resistance (4) ja jc soic16 ...................................80 ...... . 35 ...c/w notes: 1) exceeding these ratings may damage the device. 2) the maximum allowable power dissipation is a fun ction of the maximum junction temperature t j (max), the junctionto ambient thermal resistance ja , and the ambient temperature t a . the maximum allowable continuous power dissipatio n at any ambient temperature is calculated by d(max)=(t j (max) t a )/ ja . exceeding the maximum allowable power dissipation will cause excessive die temperature, and the regul ator will go into thermal shutdown. internal thermal shutdown ci rcuitry protects the device from permanent damage. 3) the device is not guaranteed to function outside of its operating conditions. 4) measured on jesd517, 4layer pcb 5) in accordance with the human mody model (hbm), i .e. equivalent to discharging a 100pf capacitor through a 1.5k series resistor 6) in accordance with the mancine model (mm), i.e. equivalent to discharging a 200pf capacitor through a 10 series resistor and a 0.75h inductor. 7) at tamb=25c the typical v be is 0.7v. 8) at negative cs currents (typ<5ma) the capacitiv e mode protection can be triggered. 9) when eol detection is enabled
hr2000 fluorescent lamp hb driver with pfc hr2000 rev. 1.0 www.monolithicpower.com 5 2/20/2013 mps proprietary information. patent prote cted. unauthorized photocopy and duplication prohib ited. ? 2013 mps. all rights reserved. electrical characterics ta=25 o c; vvcc=13.0v; c ct =100pf; r ref =51kohm; c cp/eol =100n, c fc =100nf; all voltage referenced to ground; unless otherwise specified. no condition symbol min. typ. max. unit high voltage supply 1.0 leakage current high voltage pins sw,hg,bst=630v, vvcc=0 i leak 15 a start - up state 2.0 start of oscillation vcc(start) 11.2 12 12.8 v 2.1 stop of oscillation vcc(low) 7.7 8.2 8.7 v 2.2 nonoscillating current vvcc=11v;note2 ivcc(non osc) 230 285 340 a 2.3 clamp voltage vcc at 5ma non oscillating vcc(clamp) 14.5 16 17 v 2.4 reset voltage note8 vcc(reset) 4.5 5.5 6.5 v preheat state 3.0 starting frequency vfc=0, note1 fstart 96 102 1 08 khz 3.1 preheat time ccp=100nf tph 540 620 700 ms 3.2 charge current at cp/eol pin vcpeol=1.0v, note1 0 i cp (charge) 6.0 a 3,3 discharge current at cp/eol pin vcpeol=3.5v, note10 i cp (disch) 6.0 a 3.4 peak voltage difference at cp/eol pin when timing cc peol (pk) 2.25 v 3.5 cp comparator level low v cp (min) 1.15 1.25 v 3.6 control voltage at cs pin note3 vcs(pre) 375 41 0 445 mv 3.7 maximum voltage at pre/ft pin vpre vcc v ignition state 4.0 ignition time ccp=100n tig 500 600 700 ms 4.1 saturation current detection level at ics(ig)=0.1ma vcs(clamp) 0.75 v 4.2 over current feedback gain note4 koc 0.9 1 1.1 a/a 4.3 pre/ft pin reset level after preheat, pre/ft will be dropped to this level. then detecting the voltage at pre/ft is active. vfault(reset2) 150 200 250 mv burn state 5.0 bottom frequency note1 f b 42 43.5 45 khz 5.1 nonoverlap time t no 0.85 1.20 1.55 s 5.2 symmetry halfbridge note1,7 sym f b 0.9 1.0 1.1 5.3 symmetry nonoverlap time note 9 sym t no 1.0 5.4 total supply current notes 1,5 itot 1.7 2.5 ma 5.5 charge current at fc pin vfc=1.5v i fc (ch) 43 50 57 a 5.6 discharge current at fc pin vfc=1.5v i fc (disch) 84 100 116 a 5.7 fc transconductance vfc=1.5v i ct /v fc 10 a/v 5.8 capacitive mode control voltage note6 vcs(cap) 32 14 0 mv 5.9 reference voltage vref 2.425 2.500 2.575 v 5.10 on voltage at pin ug |iug|=1ma vug(on) 12.96 v 5.11 off voltage at pin ug |iug|=1ma vug(off) 16 mv 5.12 on voltage at pin lg |ilg|=1ma vlg(on) 12.96 v
hr2000 fluorescent lamp hb driver with pfc hr2000 rev. 1.0 www.monolithicpower.com 6 2/20/2013 mps proprietary information. patent prote cted. unauthorized photocopy and duplication prohib ited. ? 2013 mps. all rights reserved. electrical characterics (continued) ta=25 o c; vvcc=13.0v; c ct =100pf; r ref =51kohm; c cp/eol =100n, c fc =100nf; all voltage referenced to ground; unless otherwise specified. no condition symbol min. typ. max. unit 5.13 off voltage at pin lg |ilg|=1ma vlg(off) 16 mv 5.14 up side driver on resistance rug(on) 33 5.15 up side driver off resistance rug(off) 16 5.16 low side driver on resistance rlg(on) 33 5.17 low side driver off resistance rlg(off) 16 5.18 voltage drop at bootstrap switch 10ma source current vdrop 1.7 v 5.19 on resistance of the discharge switch at cp/eol pin rcp(disch) 14 k 5.20 on resistance connected pre/ft pin and vcc pin rpre 16 k fault and end of life 6.0 fault reference level vfault(ref) 1.22 v 6.1 fault reset level note8 vfault(reset1) 0.9 v 6.2 fault charge current source v preft =0.75v ifault(ch) 3.2 a 6.3 fault discharge current v preft =0.75v ifault(disch) 0.62 a 6.4 on resistance discharge switch v preft =0.5v rfault(disch) 16 k 6.5 high level eol comparator veol(high) 2.9 3.0 3 .1 v 6.6 low level eol comparator veol(low) 1.9 2.0 2.1 v power factor control 7.0 output voltage reference current vvo=3.0v ivo(ref) 97 102 107 a 7.1 ovc reference level vovc(ref) 1.22 1.27 1.32 v 7.2 delay ovc comparator tovc 100 ns 7.3 vo offset voltage vvo(low) 0.72 v 7.4 vo dynamic range vvo 3.1 v 7.5 maximum on time vvo=vvo(low) ton(max) 20 s 7.6 zcd reference vzcdref 2 v 7.7 duration off pulse toff 1.4 s 7.8 ovc low voltage vovc(low) 94 mv 7.9 vo low reference ivo(low) 80 90 100 a 7.10 offvoltage pfc vvo(off) 3.8 v 7.11 active vo clamp voltage ivo=200a vvo(clamp) 6.2 v 7.12 passive vo clamp voltage ivo=200a, vvcc=0v vvo(pas) 3.5 v 7.13 gate pull down resistance r gate_pull_down 14 notes 1) excluding situations where the over current prot ection is active. 2) the non oscillation current is specified in a te mperature range of 0 to 100 0c. for tj < 0 0c and tj > 100 0c the m aximum startup current is 350 ma. 3) data sampling of vcs(ph) is performed at the end of conduction of t2. 4) gain is defined as ict/ics with vcs>vcs(clamp). 5) total supply current is specified in a tj temper ature range of 20 0c to 125 0c at fb, excluding gate drive charge. 6) data sampling of vcs(cap) is performed at the st art of 7) conduction of t2. 8) the symmetry sym fb is calculated from the quoti ent sym fb = t1tot/t2tot, with t1tot the time between turnoff of g2 and the turnoff of g1, and t2tot the time between turn off of g1 and the turnoff of g2. 9) not measured, guaranteed by design. 10) the symmetry sym tno is defined as the ratio be tween deadtime1 and deadtime2. deadtime1 is the time betw een turning off g1 and turning on g2. deadtime2 is the time between turning off g2 and turning on g1. 11) preheat & ignition states.
hr2000 fluorescent lamp hb driver with pfc hr2000 rev. 1.0 www.monolithicpower.com 7 2/20/2013 mps proprietary information. patent prote cted. unauthorized photocopy and duplication prohib ited. ? 2013 mps. all rights reserved. typical characteristics 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 -50 0 50 100 150 5.50 5.55 5.60 5.65 5.70 5.75 5.80 5.85 408.5 409.0 409.5 410.0 410.5 411.0 411.5 412.0 412.5 5.85 5.90 5.95 6.00 6.05 6.10 6.15 6.20 6.25 0 20 40 60 80 100 120 0 50 100 150 200 250 300 350 400 8.14 8.16 8.18 8.20 8.22 8.24 8.26 8.28 8.30 11.70 11.75 11.80 11.85 11.90 11.95 12.00 12.05 12.10 12.15 -50 -30 -10 10 30 50 70 90 110130 -50 -30 -10 10 30 50 70 90 110130 -10 -50 -30 10 30 50 70 90 110130 -50 -30 -10 10 30 50 70 90 110130 -50 -30 -10 10 30 50 70 90 110130 -50 -30 -10 10 30 50 70 90 110130 -50 -30 -10 10 30 50 70 90 110130 42.6 42.8 43 43.2 43.4 43.6 43.8 44 -50 0 50 100 150
hr2000 fluorescent lamp hb driver with pfc hr2000 rev. 1.0 www.monolithicpower.com 8 2/20/2013 mps proprietary information. patent prote cted. unauthorized photocopy and duplication prohib ited. ? 2013 mps. all rights reserved. typical characteristics (continued) fc transconductance vs. temperature v ref vs.temperature voltage drop at bootstrap switch vs. temperature fault reference level vs. temperature cs capacitive modedetection threshold vs. temperature ovc reference voltage vs. temperature gate maximum on time vs. temperature output voltage reference current vs. temperature non-overlap time vs. temperature 1.090 1.100 1.110 1.120 1.130 1.140 1.150 1.160 1.170 1.180 1.190 1.200 -50 -30 -10 10 30 50 70 90 110 130 0.000 2.000 4.000 6.000 8.000 10.000 12.000 14.000 -50 -30 -10 10 30 50 70 90 110 130 2.475 2.480 2.485 2.490 2.495 2.500 -50 -30 -10 10 30 50 70 90 110130 -25.000 -20.000 -15.000 -10.000 -5.000 0.000 -50 -30 -10 10 30 50 70 90 110130 0.000 0.500 1.000 1.500 2.000 2.500 3.000 -50 -30 -10 10 30 50 70 90 110 130 1.215 1.216 1.217 1.218 1.219 1.220 1.221 1.222 -50 -30 -10 10 30 50 70 90 110 130 101.200 101.400 101.600 101.800 102.000 102.200 102.400 -50 -30 -10 10 30 50 70 90 110130 1.224 1.225 1.226 1.227 1.228 1.229 1.230 1.231 1.232 -50 -30 -10 10 30 50 70 90 110130 26.95 27 27.05 27.1 27.15 27.2 27.25 27.3 27.35 27.4 -50 0 50 100 150
hr2000 fluorescent lamp hb driver with pfc hr2000 rev. 1.0 www.monolithicpower.com 9 2/20/2013 mps proprietary information. patent prote cted. unauthorized photocopy and duplication prohib ited. ? 2013 mps. all rights reserved. typical characteristics (continued) v out low reference current vs. temperature duration off time vs. temperature 0.000 0.200 0.400 0.600 0.800 1.000 1.200 1.400 1.600 1.800 -50 -30 -10 10 30 50 70 90 110130 88.500 89.000 89.500 90.000 90.500 91.000 91.500 92.000 -50 -30 -10 10 30 50 70 90 110130
hr2000 fluorescent lamp hb driver with pfc hr2000 rev. 1.0 www.monolithicpower.com 10 2/20/2013 mps proprietary information. patent prote cted. unauthorized photocopy and duplication prohib ited. ? 2013 mps. all rights reserved. typical performance characteristics (continued) performance waveforms are tested on the evaluation board of the application example. v in = 220vac, 18w fl load, c ct =100pf, r ref =51kohm, c cp/eol =100n, c fc =33nf, t a = 25c, unless otherwise noted. v g ate 10v/div. v pfc_ou t 100v/div. v in 100v/div. i in 200ma/div. v g ate 10v/div. v vo 2v/div. v pfc_ou t 100v/div. i l 200ma/div. v g ate 10v/div. v ovc 500mv/div. v sense 1v/div. i l 200ma/div. v lg 10v/div. v cc 10v/div. v pfc_ou t 100v/div. i lam p 500ma/div. v lam p 100v/div. v fc 2v/div. v pre/ft 10v/div. i prehe at 1a/div. v lam p 100v/div. v cs 500mv/div. v lg 10v/div. i lam p 1a/div. v lg 10v/div. v bus 200v/div. v cc 10v/div. i lam p 500ma/div. v lg 10v/div. v lam p 400v/div. v pre/ft 5v/div. v cp/eo l 2v/div. v lg 10v/div. v cs 500mv/div. v pre/ft 5v/div. v lam p 200v/div.
hr2000 fluorescent lamp hb driver with pfc hr2000 rev. 1.0 www.monolithicpower.com 11 2/20/2013 mps proprietary information. patent prote cted. unauthorized photocopy and duplication prohib ited. ? 2013 mps. all rights reserved. typical performance characteristics (continued) performance waveforms are tested on the evaluation board of the application example. v in = 220vac, 18w fl load, c ct =100pf, r ref =51kohm, c cp/eol =100n, c fc =33nf, t a = 25c, unless otherwise noted. v lg 10v/div. v lam p 500v/div. v ft 10v/div. v cs 1v/div. open lamp protection v lg 10v/div. v cs 500mv/div. v lam p 200v/div. i sho rt 1a/div. short lamp and recover
hr2000 fluorescent lamp hb driver with pfc hr2000 rev. 1.0 www.monolithicpower.com 12 2/20/2013 mps proprietary information. patent prote cted. unauthorized photocopy and duplication prohib ited. ? 2013 mps. all rights reserved. pin functions pin # name description 1 vo pfc output control pin. connect a resistor from this pin to the pfc output to set the pfc output voltage. connect a capacitor (or a rcc net work) from this pin to g nd for the compensation of the pfc regulation loop. 2 zcd pfc inductor zero current detection pin. 3 ovc pfc over voltage/current protection pin. 4 ct frequency setting capacitor pin. c onnect a capacitor from this pin to gnd to set the frequency. 5 fc frequency control pin. it is voltage controlle d oscillator (vco) pin for controlling half bridge frequency. 6 cp/eol preheat/ignition timing pin and eol detect or. a capacitor from this pin to gnd sets the preheat time and ignition time. before halfbridge works, it is discharged internally to gnd. i n the preheat state and ignition state, a triangle wavefo rm is generated on this pin and used as a timer. the voltage of the blocking capacitor is sensed to this pin to indicate the eol condition. after preheat and ignition state, the voltage at th is pin is internally discharged to the middle of the eol window comparators reference, and then the lamps eol information is under monitoring. if eol condition is confirmed, an inter nal current source charges the pre/ft pins capacitor. 7 ref internal reference current setting resistor p in. c onnect a resistor from this pin to gnd to set the frequency. 8 pre/ft in the preheat state, this pin outputs a h igh level voltage to drive the external preheating mosfet. after this period, it is discharged to vfau lt (reset2). then it is used as a fault timer to stop ic at fault condition. a t fault condition, an internal current source charg es up this pin, and when its voltage hits the fault reference thres hold, ic latches up. connect a capacitor on this pin to set the fault ti mer. 9 bst bootstrap voltage supply for half bridge leve l shifter. c onnect a capacitor (usually 10nf to 100nf) between this pin and sw pin. 10 ug half bridge up side mosfet driver. 11 sw half bridge floating middle point. 12 cs half bridge current sensor. 13 lg half bridge low side mosfet driver. 14 vcc supply voltage of the ic. 15 gnd ground 16 gate pfc gate driver pin.
hr2000 fluorescent lamp hb driver with pfc hr2000 rev. 1.0 www.monolithicpower.com 13 2/20/2013 mps proprietary information. patent prote cted. unauthorized photocopy and duplication prohib ited. ? 2013 mps. all rights reserved. figure 2 block diagram
hr2000 fluorescent lamp hb driver with pfc hr2000 rev. 1.0 www.monolithicpower.com 14 2/20/2013 mps proprietary information. patent prote cted. unauthorized photocopy and duplication prohib ited. ? 2013 mps. all rights reserved. functional description hr2000 includes halfbridge part and pfc part. half-bridge part in the typical application, the halfbridge can be defined to two basic states: oscillating state and noneoscillating state. non oscillating state: in nonoscillating state, ic stops to work. there are 4 substates: start up state; fault state; vcc under voltage state; over temperature protection (otp) state start-up state when vccvvcc(reset), if vpreft>vfault(reset), then ic will not start up. the second one is after pre/ft pins detection function is active in all oscillating substates, hr2000 will get into fault state if pre/ft pin voltage vpreft>vfault(ref) & low side drive is high. the following items will affect pre/ft pin in oscillation state. the voltage detected by the sample circuit such as c211, c212, c213, d202, r204, r205 in fig1. in eol protection and capacitive mode protection, a current source ifault(ch) will charge the capacitor at this pin such as c213 in fig1. in pfc volow state a current source ifault(disch) will discharge c213. before vvcc>vvcc(reset), this pin will be detected. if vpreft>vfault(reset), ic will not start up. vcc under voltage state there is a hysteresis for vcc detection. when power on, hr2000 begins to work after vvcc>vvcc(start). if vvcc hr2000 fluorescent lamp hb driver with pfc hr2000 rev. 1.0 www.monolithicpower.com 15 2/20/2013 mps proprietary information. patent prote cted. unauthorized photocopy and duplication prohib ited. ? 2013 mps. all rights reserved. preheat state when vvcc>vvcc(start) & vpreftvcs(pre) in a switching period, the fc pin will be discharged by an internal current source ifc(disch) cyclebycycle. this controls the working frequency. ignition state ignition state follows preheat state closely. in th is state, eol protection and cs(pre) limit are disabled. fc voltage increases which results in frequency decreasing. then the voltage on lamp gets higher and higher to ignite the lamp. cp/eol pin also only takes timing function in this state. once preheat state is over, pre/ft pin is dropped to vfault(reset2), and then the detection function is active. if pre/ft pin vpreft>vfault(ref ) & low side drive is high, then hr2000 will consider it is fault state. after preheat state, cs pin over current protection is active and limits cs voltage (power stage current). when vcs>vcs(clamp) @ low side drive=high, the impedance of cs pin will become very small and a current flows into this pin. the koc of this current will charge the ct pin to increase frequency. the low side mosfet will be turned off quickly while high side mosfet will not be affected. this results in a narrow turn on time of low side mosfet and a relatively larger turn on time of high side mosfet. this asymmetric operation of half bridge limits the output power. burn state after ignition state, burn state is entered. at the beginning of burn state, cp/eol pin will be dropped to the middle level of the eol detection window veol(middle). then the eol detection function is active instead of the timing function. voltage on fc pin will continue to increase until i t reaches a clamping level. cs pin over current protection mentioned in ignition state is still use d to limit cs voltage (power stage current). protection in oscillation state, the halfbridge protection includes: eol protection capacitive mode protection current limit vcc low protection over temperature protection eol protection end of life(eol) protection is enabled after cp/eol is dropped to veol(middle). there is a window comparator for this protection. if the voltage on cp/eol pin get out of veol(low)~veol(high), then the current source ifault(ch) will charge the capacitor at pre/ft pin. if vpreft>vfault(ref), then hr2000 will get into fault state. this protection is disabled in pfc volow state. capacitive mode protection the capacitive mode protection is active during all oscillating states. it is detected by the volta ge on cs at the moment of turning on of low side mosfet. if at this moment, vcs>vcs(cap), then capacitive mode is confirmed and fc pin is discharged at this switching cycle. vfc will decrease towards zero which means the maximum frequency if the capacitive mode always exists. if capacitive mode @ fmax is detected, then ifault(ch) is actived to charge the capacitor at pre/ft pin. current limit the current limit is realized on cs pin. there are three kinds of limitation on cs pin. vcs(pre) in preheat state; vcs(clamp) of over current protection function in oscillating states;
hr2000 fluorescent lamp hb driver with pfc hr2000 rev. 1.0 www.monolithicpower.com 16 2/20/2013 mps proprietary information. patent prote cted. unauthorized photocopy and duplication prohib ited. ? 2013 mps. all rights reserved. capacitive protection in oscillating states. they have been described in the related states above. vcc low protection it is mentioned in vcc under voltage state. over temperature protection (otp) it is described in otp state. pfc part in the typical application, pfc can be defined to 3 states: normal state; volow state; ovc state; normal state pfc works at boundary conduction mode (bcm) with ton control. fig3 shows the internal block. figure 3 pfc part block the ton is set by the voltage at vo pin. higher vvo, shorter ton. the circuit in fig1 shows the example. zcd pin detects the inductor current zerocrossing point. when the vzcd vvo(off), ton is zero, and gate pin is low. the minimum turn off time is set internally to 1.4s. vo-low state in case of main voltage too low, pfc may not maintain its intended output voltage. in order to keep on working, the current sunk into vo pin is monitored. if it is lower than ivo(low) the ic will get into volow state. in volow state: there is a current ifault(disch) to discharge pre/ft pin. this can increase the protection level. eol protection is disabled. vovcvovcref or vovc hr2000 fluorescent lamp hb driver with pfc hr2000 rev. 1.0 www.monolithicpower.com 17 2/20/2013 mps proprietary information. patent prote cted. unauthorized photocopy and duplication prohib ited. ? 2013 mps. all rights reserved. application information pfc part setting the pfc output voltage the vo pin is used to set the pfc output voltage. connect a resistor (r105, r106, r107 in figure 1) between the pfc output and vo pin, its value is set by: o _ pfc pfc _ out vo(ref) v 2v r i ? = where i vo(ref) =102a is the reference sink current through vo pin. connect a capacitor in range of 0.47f to 10f (c103 in figure 1) or a rcc network from vo pin to gnd to compensate the pfc regulation loop. setting the over voltage and over current protection the ovc pin is used for the over voltage and over current protection for the pfc stage. connect this pin to the voltage divider (r108, r109, r110 and r102 in figure 1) of the pfc output to set the over voltage protection point. ov _ h o _ pfc _ pro ov _ l ovc(ref ) r v r v = where v ovc(ref) =1.26v is the ovc protection threshold voltage, and v o_pfc_pro is protection point of the pfc output voltage. r ov_h is the upper side resistor of the divider and r ov_l is the low side resistor of the voltage divider. the over current protection senses the peak current through the pfc mosfet. the sensing resistor (r101 in figure 1) is set by: ovc(ref ) f _ diode oc oc v v r i + = where v f_diode 0.7v is the forward voltage of the diode (d107 in figure 1), and i oc is the over current protection point. setting the zcd detection an auxiliary winding of the pfc inductor is used to sense the voltage across the inductor to indicate the zero inductor current condition. set the turn ratio of the auxiliary winding large enough to make sure the reflected voltage across the auxiliary winding is higher than the zcd reference voltage vzcdref. usually, setting the reflected zcd voltage at around 5v at maximum input voltage is recommended. a zener diode is integrated on zcd pin. add a resistor in 10k to 100k range between the auxiliary winding and the zcd pin to limit the current sunk into zcd pin, according to the input voltage range. half bridge part setting the oscillator of half bridge the capacitor on ct pin (c201 in figure 1) and the resistor on ref pin (r201 in figure 1) determine the bottom operating frequency. the resistor on ref pin also determines the non overlap time of the half bridge. estimate the frequency set resistor on ref pin with the desired nonoverlap time: ref no r t 0.15 1.127 ( s) 51k = + note that the r ref resistor should not exceed the range in the limiting values. choose a proper capacitor on ct pin to set the bottom operating frequency. b ref int t par 0.5 f 2(r r ) * (c c ) 300ns = + + + where c t is the capacitor on ct pin, r int =0.3k is the internal parasitic resistance on ref pin and c par =5pf is the internal parasitic capacitance on ct pin. choose a proper capacitor on ct pin and then redesign the resistor on ref pin to make sure the bottom operating frequency is accurate. the start up frequency is: st t par ref int 0.5 f 2.5v (c c ) 300ns 2.5v 35 a 2(r r ) = + + + + setting the preheat time and ignition time the capacitor on cp/eol pin (c203) and the resistor on ref pin determine the preheat time and ignition time.
hr2000 fluorescent lamp hb driver with pfc hr2000 rev. 1.0 www.monolithicpower.com 18 2/20/2013 mps proprietary information. patent prote cted. unauthorized photocopy and duplication prohib ited. ? 2013 mps. all rights reserved. cp ref preheat c r t 600 (ms) 100nf 51k = cp ref ignition c r t 562 (ms) 100nf 51k = setting the preheat current limitation in the preheat stage, the cs pin limits the preheat current through the filament of the fl. the preheat current is limited by setting the sense resistor on cs pin (r202 in figure 1) through: cs(pre) preheat _ pk cs v i r = where the v cs(pre) =410mv is the threshold voltage of cs pin to limit the preheat current. if using the filament transformer for preheating, this cs pin function will limit the resonant curren t in the preheat stage. the over current limitation function on cs pin limits the ignition voltage or ignition current in the ignition state and any exceeded output current/power condition. add a diode (d203 in figure 1) like 1n4148 in parallel with the sense resistor and a 1k resistor (r203 in figure 1) between the cs pin and the current sense resistor to limit the negative voltage on cs pin. design the pfc inductor the hr2000 operates the pfc in boundary conduction mode (bcm) with ontime (ton) control. the frequency of the pfc stage is variable. the design of the pfc inductor relates to the output power, the range of the input ac voltage and the desired minimum operating frequency. it is also limited by the maximum turn on time of hr2000. the maximum peak current through this inductor is: o _ max l _ pk _ max in _ min_ rms 2 2p i v = where is the efficiency of the pfc stage, usually in range of 0.95 to 0.98. the maximum turn on time of the pfc mosfet occurs at the minimum ac input voltage: l _ pk _ max o _ max on _ max 2 in _ min_ rms in _ min_ rms l i l 2p t v 2v = = then the inductor is restricted by the maximum on time limit of ic: 2 in _ min_ rms on _ limit o _ max v t l 2p where t on_limit is the ics limit for maximum on time, design its value with 20s. the minimum operating frequency occurs at the minimum ac input voltage or the maximum ac input voltage. in _ min_ rms o in _ min_ rms in _ max_ rms o in _ max_ rms min o l _ pk _ max o l _ pk _ max 2v (v 2v ) 2v (v 2v ) f min( , ) l v i l v i ? ? = for most of the specifications, such as the universal input (85vac to 265vac) and 400v pfc output, the minimum frequency occurs at the maximum ac input voltage. design the inductor value with the desired minimum operating frequency, and it should be in the restricted range by the ics limit of the maximum on time. application example this application example introduces the design of a 16w fl based on hr2000. it requires the pf (power factor) over 0.9. the boost pfc stage and resonant half bridge power structure is used for this fl driver. the integrated pfc control and half bridge driver of hr2000 fits for this type of application well.
hr2000 fluorescent lamp hb driver with pfc hr2000 rev. 1.0 www.monolithicpower.com 19 2/20/2013 mps proprietary information. patent prote cted. unauthorized photocopy and duplication prohib ited. ? 2013 mps. all rights reserved. specification: parameter symbol condition min typ max units input supply voltage vin 2 wire 198 264 vac ac line frequency f line 47 50 63 hz lamp voltage v lamp 55 vrms lamp current i lamp 0.29 a output lamp power p lamp 16 w preheat current i pre 0.18 0.3 a preheat time t pre rref=51k, ccp=100nf 674 ms ignition time t ign rref=51k, ccp=100nf 611 ms open circuit voltage voc tte 300 vrms burning mode frequency f run 44.6 khz efficiency (full load) 80 % line regulation % startup time t st 1 s conducted emi meets en55015b power factor 90 % harmonics meets iec6100032 class c ambient temperature tamb free convection, sea level 40 schematic: 1 2 3 p2 header 3 l2 6.8m h zc d 2 c t 4 c p/eo l 6 sw 11 c s 12 vc c 14 vo 1 g n d 15 ov c 3 fc 5 re f 7 bst 9 u g 10 lg 13 g ate 16 pre/ft 8 u 1 8 l4 2.2m l3a l3b l3c 1 2 3 4 vbus 1 2 3 4 p1 h eader 4 an t2 an t1 c at1 c at2 g zc d g zc d fig=63kh z fb=44.6kh z fpre=76kh z vpre<150v vig=300v vd d l1 4.7m h lb1 742792040 1m /1% r 33 12.4k/1% r 36 1206 to -92 f1 100nf/275v c x1 100nf/275v c x2 d 3 1n 4007 d 4 1n 4007 d 11n 4007 d 8 1n 4007 d 9 1n 4007 100nf/400v c 6 47k r 13 d 2 m u r 160 c 1 30 r 19 m 3 ap 03n70i 600v/3a 5.1 r 26 5.1 r 27 1206 1206 d 101n 4148 100 r 25 5.6k r 32 1nf c 22 100nf c 17 c 21 33k r 21 499k r 5 499k r 8 499k r 14 499k r 16 g ate g ate 1m /1% r 1 1m /1% r 6 1m /1% r 9 1m /1% r15 1206 1206 1206 1206 1206 1206 1206 1206 1m /1% r 35 1m /1% r 23 100pf c 10 33nf c 12 100nf c 16 c 20 51k/1% r 22 100 r 34 d 111n 4148 d 13 1n 4148 2.49k r 28 m 1 ap03n 70i m 2 ap03n 70i 20 r 18 20 r 17 d 51n 4148 d 7 1n 4148 22pf c 18 2 1 100nf c 13 c 4 1206 d 6 bzt52c 12 n s c 2 100k/0805 r 2 100k/0805 r 3 47k/0805 r 4 1k r 20 d 14 1n 5819 3.3 r 29 1206 3.3 r 30 3.3 r31 1206 1206 5.1k r 24 330pf/1kv c 3 220pf c 15 220pf c7 2.2m h l5 3.3nf c 11 68nf/400v c 8 68nf/400v c 9 43k/1206 r 10 43k/1206 r 11 43k/1206 r 7 4.7nf/1000v c 5 10nf/400v c 14 220nf/400v c19 1 m 4 ap 4002 n s r 37 43k/1206 r 12 n p:n aux=264:44 n 1:n 2:n 3=250:10:10 vbus d 12m ur 160 figure 4hr2000 fl driver for 16w lamp design procedure: please refer to the application note of hr2000 for the design procedure.
hr2000 fluorescent lamp hb driver with pfc notice: the information in this document is subject to cha nge without notice. users should warrant and guaran tee that third party intellectual property rights are not infringe d upon when integrating mps products into any appli cation. mps will not assume any legal responsibility for any said applic ations. hr2000 rev. 1.0 www.monolithicpower.com 20 2/20/2013 mps proprietary information. patent prote cted. unauthorized photocopy and duplication prohib ited. ? 2013 mps. all rights reserved. soic16 0.016(0.41) 0.050(1.27) 0 o -8 o detail "a" 0.010(0.25) 0.020(0.50) x 45 o see detail "a" 0.0075(0.19) 0.0098(0.25) 0.150 (3.80) 0.157 (4.00) pin 1 id 0.050(1.27) bsc 0.013(0.33) 0.020(0.51) seating plane 0.004(0.10) 0.010(0.25) 0.386( 9.80) 0.394(10.00) 0.053(1.35) 0.069(1.75) top view front view 0.228 (5.80) 0.244 (6.20) side view 1 8 16 9 recommended land pattern 0.213 (5.40) 0.063 (1.60) 0.050(1.27) 0.024(0.61) note: 1) control dimension is in inches. dimension in bracket is in millimeters. 2) package length does not include mold flash, protrusions or gate burrs. 3) package width does not include interlead flash or protrusions. 4) lead coplanarity (bottom of leads after forming) shall be 0.004" inches max. 5) drawing conforms to jedec ms-012, variation ac. 6) drawing is not to scale. 0.010(0.25) bsc gauge plane

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