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datasheet 5a 220khz 36v buck led constant current driver XL3005 rev 1.1 www.xlsemi.com 1 features n wide 8v to 36v input voltage range n output current sence voltage is 0.21v n maximum duty cycle 100% n minimum drop out 0.3v n fixed 220khz switching frequency n 5a constant output current capability n internal optimize power mosfet n high efficiency n excellent line and load regulation n built in thermal shutdown function n built in current limit function n built in output short protection function n available in to-263 package applications n buck constant current driver n monitor led backlighting n general purpose led lighting general description the XL3005 is a 220 khz fixed frequency pwm buck (step-down) led constant current driver, capable of driving a 5a load with high efficiency, low ripple and excellent line and load regulation. requiring a minimum number of external components, the regulator is simple to use and include internal frequency compensation and a fixed-frequency oscillator. the pwm control circuit is able to adjust the duty ratio linearly from 0 to 100%. an over current protection function is built inside. when short protection function happens, the operation frequency will be reduced from 220khz to 60khz. an internal compensation block is built in to minimize external component count. figure1. package type of XL3005
datasheet 5a 220khz 36v buck led constant current driver XL3005 rev 1.1 www.xlsemi.com 2 pin configurations figure2. pin configuration of XL3005 (top view) table 1 pin description pin number pin name description 1 gnd ground pin. care must be taken in layout. this pin should be placed outside of the schottky diode to output capacitor ground path to prevent switching current spikes from inducing voltage noise into XL3005. 2 cs output constant current sense pin (cs). the cs reference voltage is 0.21v. 3 sw power switch output pin (sw). sw is the switch node that supplies power to the output. 4 vc internal voltage regulator bypass capacity. in typical system application, the vc pin connect a 1uf capacity to vin. 5 vin supply voltage input pin. XL3005 operates from a 8v to 36v dc voltage. bypass vin to gnd with a suitably large capacitor to eliminate noise on the input.
datasheet 5a 220khz 36v buck led constant current driver XL3005 rev 1.1 www.xlsemi.com 3 function block figure3. function block diagram of XL3005 typical application circuit figure4. XL3005 typical application circuit
datasheet 5a 220khz 36v buck led constant current driver XL3005 rev 1.1 www.xlsemi.com 4 ordering information order information marking id package type packing type supplied as XL3005e1 XL3005e1 to263-5l 800 units on tape & reel xlsemi pb-free products, as designated with e1 suffix in the par number, are rohs compliant. absolute maximum ratings note1 parameter symbol value unit input voltage vin -0.3 to 40 v cs pin voltage v cs -0.3 to vin v output switch pin voltage v output -0.3 to vin v power dissipation p d internally limited mw thermal resistance (to263-5l) (junction to ambient, no heatsink, free air) r ja 30 o c/w maximum junction temperature t j -40 to 150 o c operating junction temperature t j -40 to 125 o c storage temperature t stg -65 to 150 o c lead temperature (soldering, 10 sec) t lead 260 o c esd (hbm) >2000 v note1: stresses greater than those listed under maximum ratings may cause permanent damage to the device. this is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operation is not implied. exposure to absolute maximum rating conditions for extended periods may affect reliability.
datasheet 5a 220khz 36v buck led constant current driver XL3005 rev 1.1 www.xlsemi.com 5 XL3005 electrical characteristics t a = 25 ;unless otherwise specified. symbol parameter test condition min. typ. max. unit system parameters test circuit figure4 vcs current sense voltage vin = 8v to 36v, vout=6.4v iload=0.1a to 4a 203.7 210 216.3 mv ? efficiency vin=12v ,vout=10v iout=0.3a - 95 - % ? efficiency vin=24v ,vout=16v iout=1a - 96 - % ? efficiency vin=36v ,vout=19v iout=1a - 95 - % electrical characteristics (dc parameters) vin = 12v, gnd=0v, vin & gnd parallel connect a 100uf/50v capacitor; iout=500ma, t a = 25 ; the others floating unless otherwise specified. parameters symbol test condition min. typ. max. unit input operation voltage vin 8 36 v vin uvlo vin_uvlo 5 v quiescent supply current i q v cs =vin 2.1 5 ma oscillator frequency fosc 187 220 253 khz output short frequency fosp 48 60 72 khz switch current limit i l v cs =0 7 a max. duty cycle d max v cs =0v 100 % output power pmos rdson v cs =0v, vin=12v, i sw =5a 60 80 mohm
datasheet 5a 220khz 36v buck led constant current driver XL3005 rev 1.1 www.xlsemi.com 6 typical system application (recommend output voltage safe work range) 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 recommend output voltage safe work range ouput voltage(v) input voltage(v) iout=300ma 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 recommend output voltage safe work range ouput voltage(v) input voltage(v) iout=600ma figure5.max output voltage(iout=300ma) figure6.max output voltage(iout=600ma) 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 recommend output voltage safe work range output voltage(v) input voltage(v) iout=1000ma 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 recommend output voltage safe work range output voltage(v) input voltage(v) iout=2000ma figure7.max output voltage(iout=1000ma) figure8.max output voltage(iout=2000ma) 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 0 2 4 6 8 10 12 14 16 18 20 22 24 recommend output voltage safe work range output voltage(v) input voltage(v) iout=3000ma 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 0 2 4 6 8 10 12 14 16 18 recommend output voltage safe work range output voltage(v) input voltage(v) iout=4000ma figure9.max output voltage(iout=3000ma) figure10.max output voltage(iout=4000ma)
datasheet 5a 220khz 36v buck led constant current driver XL3005 rev 1.1 www.xlsemi.com 7 -50 -25 0 25 50 75 100 125 -10 -8 -6 -4 -2 0 2 4 6 8 10 frequency change vs temperature frequency change(%) temperature( ) vin=12v,vout=6.4v,iout=308ma normalized at ta=25 -50 -25 0 25 50 75 100 125 -3.0 -2.5 -2.0 -1.5 -1.0 -0.5 0.0 0.5 1.0 1.5 2.0 2.5 3.0 cs voltage change vs temperature cs voltage change(%) temperature( ) vin=12v,vout=6.4v,iout=308ma normalized at ta=25 note2 figure11. frequency change curve figure12. cs voltage change curve note2: internal temperature compensation circuitry is provided to compensation the pcb and external line loss in system application. when the junction temperature or the output power rise the cs voltage will be compensated. this function is provided to compensation the pcb and external line loss in system application.
datasheet 5a 220khz 36v buck led constant current driver XL3005 rev 1.1 www.xlsemi.com 8 typical system application (vin=8v~36v, iout=308ma) figure13. XL3005 system parameters test circuit (vin=8v~36v, iout=308ma) 1 2 3 4 5 6 7 8 9 10 40 45 50 55 60 65 70 75 80 85 90 95 100 efficiency vs led string efficiency(%) led string(n*1w) vin=8v,iout=308ma vin=12v,iout=308ma vin=24v,iout=308ma vin=36v,iout=308ma figure14. XL3005 system efficiency curve
datasheet 5a 220khz 36v buck led constant current driver XL3005 rev 1.1 www.xlsemi.com 9 typical system application (vin=8v~36v, iout=615ma) figure15. XL3005 system parameters test circuit (vin=8v~36v, iout=615ma) 1 2 3 4 5 6 7 8 9 10 40 45 50 55 60 65 70 75 80 85 90 95 100 efficiency vs led string efficiency(%) led string(n*2w) vin=8v,iout=615ma vin=12v,iout=615ma vin=24v,iout=615ma vin=36v,iout=615ma figure16. XL3005 system efficiency curve
datasheet 5a 220khz 36v buck led constant current driver XL3005 rev 1.1 www.xlsemi.com 10 typical system application (vin=8v~36v, iout=925ma) figure17. XL3005 system parameters test circuit (vin=8v~36v, iout=925ma) 1 2 3 4 5 6 7 40 45 50 55 60 65 70 75 80 85 90 95 100 efficiency vs led string efficiency(%) led string(n*3w) vin=8v,iout=925ma vin=12v,iout=925ma vin=24v,iout=925ma vin=36v,iout=925ma figure18. XL3005 system efficiency curve
datasheet 5a 220khz 36v buck led constant current driver XL3005 rev 1.1 www.xlsemi.com 11 typical system application (vin=8v~36v, iout=1540ma) figure19. XL3005 system parameters test circuit (vin=8v~36v, iout=1540ma) 1 2 3 4 5 6 7 8 9 10 60.0 62.5 65.0 67.5 70.0 72.5 75.0 77.5 80.0 82.5 85.0 87.5 90.0 92.5 95.0 97.5 100.0 efficiency vs led string efficiency(%) led string(n*5w) vin=8v,iout=1540ma vin=12v,iout=1540ma vin=24v,iout=1540ma vin=36v,iout=1540ma figure20. XL3005 system efficiency curve
datasheet 5a 220khz 36v buck led constant current driver XL3005 rev 1.1 www.xlsemi.com 12 typical system application (vin=8v~36v, iout=2140ma) figure21. XL3005 system parameters test circuit (vin=8v~36v, iout=2140ma) 1 2 3 4 5 6 7 8 60.0 62.5 65.0 67.5 70.0 72.5 75.0 77.5 80.0 82.5 85.0 87.5 90.0 92.5 95.0 97.5 100.0 efficiency vs led string efficiency(%) led string(n*7w) vin=8v,iout=2140ma vin=12v,iout=2140ma vin=24v,iout=2140ma vin=36v,iout=2140ma figure22. XL3005 system efficiency curve
datasheet 5a 220khz 36v buck led constant current driver XL3005 rev 1.1 www.xlsemi.com 13 typical system application (pwm dimming) pwm dimming function can be used in typical system application with external components. changing the duty cycle of pwm signal can get different led current. t he pwm signal high voltage above 3.3v(referenced to ground, lower than vin), low voltage below 0.2v(referenced to ground). figure23. XL3005 system parameters test circuit (pwm dimming) typical system application (led ovp) led ovp function can be used in typical system application with external components. the output voltage can be limited in a suitable value by choose different zener diode when the output led open. the zener diode voltage choosed by output led voltage's 1.3 times. figure24. XL3005 system parameters test circuit (led ovp)
datasheet 5a 220khz 36v buck led constant current driver XL3005 rev 1.1 www.xlsemi.com 14 package information to263-5l dimensions in millimeters dimensions in inches symbol min max min max a 4.440 4.650 0.175 0.183 b 0.710 0.970 0.028 0.038 c 0.360 0.640 0.014 0.025 c2 1.255 1.285 0.049 0.051 d 8.390 8.890 0.330 0.350 e 9.960 10.360 0.392 0.408 e 1.550 1.850 0.061 0.073 f 6.360 7.360 0.250 0.290 l 13.950 14.750 0.549 0.581 l2 1.120 1.420 0.044 0.056
datasheet 5a 220khz 36v buck led constant current driver XL3005 rev 1.1 www.xlsemi.com 15 important notice xlsemi reserve the right to make modifications, enhancements, improvements, corrections or other changes without notice at any time. xlsemi does not assume any liability arising out of the application or use of any product described herein; neither does it convey any license under its patent rights, nor the rights of others. xlsemi assumes no liability for applications assistance or the design of buyers products. buyers are responsible for their products and applications using xlsemi components. to minimize the risks associated with buyers products and applications, buyers should provide adequate design and operating safeguards. xlsemi warrants performance of its products to the specifications applicable at the time of sale, in accordance with the warranty in xlsemi s terms and conditions of sale of semiconductor products. testing and other quality control techniques are used to the extent xlsemi deems necessary to support this warranty. except where mandated by applicable law, testing of all parameters of each component is not necessarily performed. for the latest product information, go to www.xlsemi.com .

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