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led driver ic BCR450 datasheet, rev. 3.1, feb. 2013 power management and multimarket
edition 2013-02-21 published by infineon technologies ag, 81726 mnchen, germany ? infineon technologies ag 2013. all rights reserved. attention please! the information herein is given to describe certain co mponents and shall not be considered as a guarantee of characteristics. terms of delivery and rights to technical change reserved. we hereby disclaim any and all warranties, including but not limited to warranties of non-infringement, regarding circuits, descriptions and charts stated herein. information for further information on technology , delivery terms and conditions and prices please contact your nearest infineon technologies office ( www.infineon.com ). warnings due to technical requirements components may contain da ngerous substances. for information on the types in question please contact your nearest infineon technologies office. infineon technologies components may only be used in life-support devices or systems 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 device 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.
BCR450, led driver ic revision history: 2013-02-21, rev. 3.1 previous version: 2009-10-15, rev. 3.0 page subjects (major change s sinc e last revision) figure 1 block diagram: pin 3 (en), esd protection and base resistor added table 5 note 1) added to enable voltage range table 6 typical input capacitance of pin 3 (en) added figure 5 units added to figure title figure 6 units added to figure title BCR450 led driver ic datasheet 3 rev. 3.1, 2013-02-21
datasheet 4 rev. 3.1, 2013-02-21 BCR450 led driver ic BCR450 power led driver ic 1 BCR450 power led driver ic features ? low voltage drop across sense resistor, 0.15 v typical ? high output current precision ? operating voltage fro 8 to 27 v ? over voltage protection ? overtemperature current foldback and thermal shut down function ? adjustable constant led current up to 85 ma in stand alone op eration ? precise internal bandgap enables high output current accuracy ? up to 2.5 a led current possible by using external transistor ? en input for pwm led brightness control and on/off control ? very low standby current ? minimum number of external components required, no inductors ? very small sc-74 package: 2.9 mm x 2.5 mm x 1.1 mm benefits ? high level of colour control due to high output current precision ? small space requirement ? no electro- magnetic interference ? active thermal monitoring of chip and led temperature with cur rent fold- back to avoid thermal overstress ? low cost device ? scalable output stage opt imizing c ost and space typical applications ? general lighting e.g. retrofits ? architectural lighting, me dic al and dental lighting ? transportation like train and aircraft lighting ? strobe lighting ? universal constant current source ? signal and marker lights for orientation or navigation ? led controller for industrial ap plications , not qualified to aecq- 100 3 2 1 4 5 6 6 BCR450 typical 12v high power led application vs bcx68 -25 1 3 2,5 4 350ma 2 description the BCR450 is a led driver ic optimized for usage with an external power transistor for driving leds above 100 ma. for currents up to 85 ma the BCR450 can be used in stand alone operation. the output current level can be adjusted with an external sense resistor. the ic can be switched on and off by an external signal, which is also suitable to regu late brightness of the leds by pwm dimming. the precise internal ban dgap s tabilizes the circuit and provides stable current condit ions over temperature range. additional features are included to protect the leds from overload, short circuit events as well as from over voltage . the leds can be also protected against thermal overload by thermally coupling the leds to the BCR450.
BCR450_ block diagram.vsd 6 5 4 3 2 1 iout gnd en vs gnd vsense led controller BCR450 vref op output stage bandgap BCR450 led driver ic description datasheet 5 rev. 3.1, 2013-02-21 figure 1 block diagram pin definition table 1 pin definition and function pin number pin symbol function 1 i out controlled output current to drive leds 2 gnd ic ground 3 en power on control voltage pin (pwm inpu t) 4 v sense sense control voltage pin for internal feedback mechanism 5 gnd ic ground 6 v s supply voltage table 2marking type marking package BCR450 50s sc74
= = = source 1 source 2 source 3 5v= s 4 s 7 s 1 r 1 r 2 s 8 s 9 s 6 s 2 s 3 ac measurement BCR450_test circuit.vsd source 4 s 5 source 5 pwm = vref v s v sense i out en gnd + - = ~ 150 mv vout datasheet 6 rev. 3.1, 2013-02-21 BCR450 led driver ic description figure 2 electrical test circuit thermal resistance table 3 thermal resistance parameter symbol value unit junction - solder point r thjs 75 k/w absolute maximum ratings table 4 absolute maximum ratings parameter symbol limit value unit supply voltage v s 40 v sense voltage v sense 200 mv output current i out 100 ma total power dissipation; t s = 112.5c p tot 500 mw junction temperature t j 150 c storage temperature range t stg -65... 150 c esd capability human body model 1) 1) for esd testing, the chip was mounted in a sc74 package on an application board, where g nd is electrically connected to the chip gnd v esd_hbm 2000 v
BCR450 led driver ic electrical characteristics datasheet 7 rev. 3.1, 2013-02-21 3 electrical characteristics 3.1 dc characteristics 8 v < v s < 27 v ; - 40 c < t j < 150 c, all voltages with respect to gro und ; current directions as given in figure 2 ; unless otherwise specified all parameters are tested at 25 c, unless otherwise specified table 5 dc characteristics parameter symbol values unit note / test condition min. typ. max. overall current consumption is short 70 90 ma i s short; v s = 8..27 v v sense = 20 mv overall current consumption is short 600 p a i s short; v s = 42 v v sense = 20 mv overall standby current consumption is standby 200 na en = 0 v; v s = 8..27 v v sense = 20 mv current of enable input i en 20 40 70 p a v sense = 0..200 mv current of driver output i outhigh 70 90 ma v sense = 20 mv; v s = 8 v current of driver output i outlow 100 na v sense = 200 mv; v s = 8v current of sense input i sense 200 na v sense = 20..200 mv voltage of driver output v out 6 v i out = 15 ma; s1, s6, s8, s9 = on; r1 = 390 : r2 = 10 : see figure 2 voltage of sense input v sense 135 150 165 mv i out = 15 ma; v s = 8..27 v s3, s6, s8 = on r1 = 390 : r2 = 10 : t j = 115 c see figure 2 enable voltage range u pon -0.3 5 1) 1) esd protection diode of pin 3 (en) will breakdown above 5 v input voltage to gnd v control voltage for power on u on 0.6 0.85 5 v control voltage for power off u off -0.3 0.35 v over voltage protection v s, ov 27 v i out -> 0 a delta sense voltage ' v sense 2 10 50 mv i out : 0 -> 50 ma drop voltage v s - v out 1.2 v i out < 40 ma temperature shut down t sd 130 150 170 c i out -> 0 a; refer to t j
datasheet 8 rev. 3.1, 2013-02-21 BCR450 led driver ic electrical characteristics 3.2 digital signals all parameters are tested at 25 c, unless otherwise specified table 6 digital control parameter (en) parameter symbol values unit note / te st condition min. typ. max. pwm signal frequency f pwm 1000 hz t dutycycle = 1%; sign al level reaches 100% in on and off mode pwm duty cycle t dutypwm 5 % f = 5 khz; signal lev el reaches 100% in on and off mode pwm voltage u pwm 5 v en input capacitance to gnd c en 130 pf en = 0 v 3.3 transient parameters 8 v < v s < 27 v ; - 40 c < t j < 150 c, all voltages with respect to gro und ; current directions as given in figure 2 ; unless otherwise specified all parameters are tested at 25 c, unless otherwise specified table 7 digital control parameter (en) parameter symbol values unit note / test condition min. typ. max. response time t on 10 p s en: 0 -> 5 v @ t rise < 20 ns t risetime @(10...90%) * v sense ( i out ~ 15 ma); r sense = 10 : t off 70 p s en: 5 v -> 0 @ t fall < 20 ns t falltime @(90...10%) * v sense ( i out ~ 15 ma); r sense = 10 :
BCR450 led driver ic measured parameters datasheet 9 rev. 3.1, 2013-02-21 4 measured parameters BCR450 ic has been measured in test bench with undefined high thermal resistance this is valid for all diagramed dc- and ac- parameters 4.1 dc- parameter v out = 1.0 v, en = 2.4 v i s vers temperature ( v s ) ; v sense = 20 mv is vers temp_vs_20mv_vout1v.vsd i_s_vers temp; vs v_sense = 20 mv; v_out = 1 v; v_en = 2.4 v 60.00 65.00 70.00 75.00 80.00 85.00 90.00 95.00 100.00 105.00 -40 -25 0 25 45 65 85 105 125 150 c is (ma) vs_8v vs_14v vs_27v vs_40v vs_42v i s vers v s ( temperature ); v sense = 20 mv is vers vs_temp_20mv_vout1v.vsd i_s_vers vs; temp v_sense = 20 mv; v_out = 1 v; v_en = 2.4 v 0.00 20.00 40.00 60.00 80.00 100.00 120.00 8 14274042 vs (v) is (ma) -40c -25c 0c 25c 45c 65c 85c 105c 125c 150c i en vers temperature ( v s ) ; v sense = 20 mv ien vers temp_vs_20mv_vout1v.vsd i_en_vers temp; vs v_sense = 20 mv; v_out = 1 v; v_en = 2.4 v 30.00 32.00 34.00 36.00 38.00 40.00 42.00 44.00 46.00 48.00 -40 -25 0 25 45 65 85 105 125 150 c ien (ua) vs_8v vs_14v vs_27v vs_40v vs_42v i en vers v s ( temperature ); v sense = 20 mv ien vers vs_temp_20mv_vout1v.vsd i_en_vers vs; temp v_sense = 20 mv; v_out = 1 v; v_en = 2.4 v 30.00 32.00 34.00 36.00 38.00 40.00 42.00 44.00 46.00 48.00 8 1 42 74 04 2 vs (v) ien (ua) -40c -25c 0c 25c 45c 65c 85c 105c 125c 150c
i sense vers temperature ( v s ) ; v sense = 20 mv isense vers temp_vs_20mv_vout1v.vsd i_sense_vers temp; vs v_sense = 20 mv; v_out = 1 v; v_en = 2.4 v 100.00 105.00 110.00 115.00 120.00 125.00 130.00 135.00 140.00 145.00 -40 -25 0 25 45 65 85 105 125 150 c isense (na) vs_8v vs_14v vs_27v vs_40v vs_42v i sense vers v s ( temperature ); v sense = 20 mv isense vers vs_temp_20mv_vout1v.vsd i_sense_vers vs; temp v_sense = 20 mv; v_out = 1 v; v_en = 2.4 v 100.00 105.00 110.00 115.00 120.00 125.00 130.00 135.00 140.00 145.00 8 1 42 74 04 2 vs (v) isense (na) -40c -25c 0c 25c 45c 65c 85c 105c 125c 150c i out vers temperature ( v s ) ; v sense = 20 mv iout vers temp_vs_20mv_vout1v.vsd i_out_vers temp; vs v_sense = 20 mv; v_out = 1 v; v_en = 2.4 v 60.00 65.00 70.00 75.00 80.00 85.00 90.00 95.00 100.00 -40 -25 0 25 45 65 85 105 125 150 c iout (ma) vs_8v vs_14v vs_27v vs_40v vs_42v i out vers v s ( temperature ); v sense = 20 mv i_out_vers vs; temp v_sense = 20 mv; v_out = 1 v; v_en = 2.4 v 0.00 20.00 40.00 60.00 80.00 100.00 120.00 8 1 42 74 04 2 vs (v) iout (ma) -40c -25c 0c 25c 45c 65c 85c 105c 125c 150c datasheet 10 rev. 3.1, 2013-02-21 BCR450 led driver ic measured parameters v s = 14 v, v out = 1 v; en = 2.4 v i out vers temperature ( v sense ) iout vers temp_vsense_vs14v_vout1v.vsd i_out_vers temp; vsense v_s = 14 v; v_out = 1 v; v_en = 2.4 v 0.00 10.00 20.00 30.00 40.00 50.00 60.00 70.00 80.00 90.00 100.00 -40 -25 0 25 45 65 85 105 125 150 c iout (ma) 110mv 114mv 118mv 122mv 126mv 130mv 134mv 138mv 140mv 142mv 144mv 146mv 148mv 150mv 152mv 154mv 156mv i out vers v sense ( temperature ) iout vers vsense_temp_vs14v_vout1v.vsd i_out_vers v_sense; temp v_s = 14 v; v_out = 1 v; v_en = 2.4 v 0.00 10.00 20.00 30.00 40.00 50.00 60.00 70.00 80.00 90.00 100.00 110 114 118 122 126 130 134 138 140 142 144 146 148 150 152 154 156 vsense (mv) iout (ma) -40c -25c 0c 25c 45c 65c 85c 105c 125c 150c
BCR450 led driver ic measured parameters datasheet 11 rev. 3.1, 2013-02-21 v s = 14 v, v out = 6 v; en = 20 mv i out vers en ( temperature ) iout vers ven_vsense20mv_vs14v_vout6v.vsd i_out_vers v_en; temp v_sense = 20 mv; v_out = 6 v; v_s = 14 v 30.00 40.00 50.00 60.00 70.00 80.00 90.00 100.00 0 0.2 0.4 0.5 0.6 0.7 0.8 0.9 1 1.1 1.2 5 ven (v) iout (ma) -40c -25c 0c 25c 45c 65c 85c 105c 125c 150c v s = 14 v, v sense = 20 mv; en = 2.4 v i out vers temperature ( v out ) iout vers temp_vout_vsense20mv_vs14v.vsd i_out_vers temperature; v_out v_sense = 20 mv; v_en = 2.4 v; v_s = 14 v 30.00 40.00 50.00 60.00 70.00 80.00 90.00 100.00 -40-25 0 25456585105125150 c iout (ma ) vout=0v vout=1v vout=2v vout=3v vout=4v vout=5v vout=6v vout=7v vout=8v vout=9v vout=10v vout=11v vout=12v vout=13v vout=14v i out vers v out ( temperature ) iout vers vout_vsense20mv_vs14v.vsd i_out_vers v_out; temp v_sense = 20 mv; v_en = 2.4 v; v_s = 14 v 30.00 40.00 50.00 60.00 70.00 80.00 90.00 100.00 123456789101112131415 vout (v) iout (ma) -40c -25c 0c 25c 45c 65c 85c 105c 125c 150c v out = 1 v, v sense = 20 mv; en = 2.4 v i s vers v s ( temperature ) is vers vs_temp_20mv_vout1v_entire range.vsd i_s_vers vs; temp v_sense = 20 mv; v_out = 1 v; v_en = 2.4 v 30.00 40.00 50.00 60.00 70.00 80.00 90.00 100.00 6 7 8 9 10 11 12 13 14 15 16 vs (v) is (ma) -40c -25c 0c 25c 45c 65c 85c 105c 125c 150c
datasheet 12 rev. 3.1, 2013-02-21 BCR450 led driver ic measured parameters v out = 6 v, v sense = 20 mv; en = 2.4 v i s vers v s ( temperature ) is vers vs_temp_20mv_vout6v.vsd i_s_vers vs; temp v_sense = 20 mv; v_out = 6 v; v_en = 2.4 v 30.00 40.00 50.00 60.00 70.00 80.00 90.00 100.00 6 6.87.68.49.210111213141516 vs (v) is (ma) -40c -25c 0c 25c 45c 65c 85c 105c 125c 150c i s vers v s ( temperature ) is vers vs_temp_20mv_vout6v_entire range.vsd i_s_vers vs; temp v_sense = 20 mv; v_out = 6 v; v_en = 2.4 v 0.00 20.00 40.00 60.00 80.00 100.00 120.00 8 1012141618202224262830323436384042 vs (v) is (ma) -40c -25c 0c 25c 45c 65c 85c 105c 125c 150c i s short -> v out = 0 v, v sense = 0 mv; en = 2.4 v i s vers v s ( temperature ) is vers vs_temp_0mv_vout0v.vsd i_s_vers vs; temp v_sense = 0 mv; v_out = 0 v; v_en = 2.4 v 30.00 40.00 50.00 60.00 70.00 80.00 90.00 100.00 8 12 16 20 24 27 28.5 29.5 30.5 31.5 32.5 33.5 38 vs (v) is (ma) -40c -25c 0c 25c 45c 65c 85c 105c 125c 150c i s standby -> v out = 0 v, v sense = 0 mv; en = 0 v i s vers v s ( temperature ) is vers vs_temp_0mv_vout0v_en0v.vsd i_s_vers vs; temp v_sense = 0 mv; v_out = 0 v; v_en = 0 v 0.00 5.00 10.00 15.00 20.00 25.00 30.00 35.00 40.00 45.00 50.00 8 121620242729313335373941 vs (v) is (ua) -40c -25c 0c 25c 45c 65c 85c 105c 125c 150c
BCR450 led driver ic measured parameters datasheet 13 rev. 3.1, 2013-02-21 v out = 6 v, i out = 15 ma; en = 2.4 v v sense vers v s ( temperature ) vsense vers vs_temp_iout15ma_vout6v.vsd vsense_vers vs; temp iout = 15 ma; v_out = 6 v; v_en = 2.4 v 125.00 130.00 135.00 140.00 145.00 150.00 155.00 -40 -25 0 25 45 65 85 105 125 150 c vsense (mv) vs =8 v vs=14v vs=27v v s = 12 v, i out = 350 ma , booster application , see figure 3 i out vers t solder tsd.vsd typical temperature shut down of BCR450 booster application 0 50 100 150 200 250 300 350 60 70 80 90 100 110 120 130 140 150 160 170 tsolderpoint ( c) iout (ma)
datasheet 14 rev. 3.1, 2013-02-21 BCR450 led driver ic measured parameters en = 2.4 v BCR450 _vdrop _schematic.vsd vs vout vdrop internal transistor BCR450 v drop vers i out vdrop .vsd typ. v drop 0 1 2 3 4 5 6 0 102030405060708090 iout (ma) v drop (v) 4.2 ac- parameter response time t on & t off ; v s = 12 v; f pulse = 1 khz; t duty = 50 % BCR450_response-time.vsd
BCR450 led driver ic evaluation board datasheet 15 rev. 3.1, 2013-02-21 5 evaluation board the evaluation board is designed to test the BCR450 as a stand alone device for lower led current applications and also with additional external ?boost er? transistors for high current, high brightness leds. up to three external transistors bcx68 or bc817su each could be used on the pcb to minimize thermal problems. 3 leds in series for high current mode or 3 leds for lo w cur rent applications can be chosen by setting resistors (for further application hints see an105 ). the particular sense voltage ca n be derived by jumpers which are provided in the layout for each test case. additional test circuit is included to measur e ac characteristics, and the enable input is designed to connect a pwm signal. the pcb is manufactured in double sided fr4 with substrate thickness of 1.0 mm. vbat BCR450 led controller leds rsensehigh leds npn power transistors jumper-h jumper-l rsenselow bcx68-25 or bc817su ac- measure pwm p2 p1 BCR450_application circuit.vsd = vref vs, pin 6 vsense, pin 4 iout, pin 1 en, pin 3 gnd, pin 2 & 5 + - figure 3 evaluation board schematic
cross section of application board.vsd bottom- layer cu 70 um top- layer cu 70 um fr4 1.0 mm via 1.3 mm 0.5 mm drill datasheet 16 rev. 3.1, 2013-02-21 BCR450 led driver ic package information figure 4 cross section of evaluation board 6 package information gpx09300 1.6 ?.1 ?.1 2.5 ?.1 0.25 1.1 max. 0.1 max. (2.25) +0.1 -0.05 0.35 (0.35) 10 ? max. 10 ? max. 2.9 ?.2 b 0.2 m b 6x 0.95 1.9 a 0.2 a m 0.15 +0.1 -0.06 321 456 figure 5 package outline; sc74 (dimensions in mm) 2.7 4 3.15 pin 1 marking cpwg5899 8 0.2 1.15 figure 6 tape loading (dimensions in mm)

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