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1. features ? 16 channels constant current output. lsd9016 16ch constant current led driver ? constant output current is to set up external resister. i out = 5ma ~ 90ma constant current output voltage : vo = 17v(max) ? excellent output current accuracy : between outputs : +/- 1%(typ) between devices : +/- 3%(typ) ? control data method : serial-in, parallel out. ? data transfer frequency : fmax = 25mhz data transfer frequency : fmax 25mhz ? operating voltage range : vdd = 4.5~5.5v ? operating temperature range : top = -40 ~85 ? 20ns delay of output to lower bouncing noise. ? schmitt trigger input. ? pb free package : LSD9016-X24t ssop24-150 - 0.64 LSD9016-X24s sop24l- 300 - 1.0 LSD9016-X24w sop24 - 375- 1.27 2. description the lsd9016 is a constant current led driver for lighting application. it has sixteen regulated current ports to provide uniform and constant current sink for driving leds within a large range of vf variations. a user may adjust the output current from 5ma to 90ma through an external resister and can control led brightness via oeb input, too. th d t l f oeb d id th b i ht i t it f 0% t 100% th e d u t y cyc l e o f oeb can d ec id e th e b r i g ht ness i n t ens it y f rom 0% t o 100% . 3. application ? automotive interior led lighting driver. ? decoration lighting. ? traffic sign ? video wall ai b d 1 ? a s i gn b oar d g2semi,.coporation tel; 82-70-8832-9685 fax;822-2051-9685 seoul korea.
4. pin description lsd9016 16ch constant current led driver pin no pad name description 1 gnd gnd terminal for logic and current sink. 2 din serial data input terminal for internal shift register. 3clock clock input terminal for internal shift register. serial data is captured at rising edge of this input. l s 1 2 3 4 5 gnd din clock strobe out0 vdd r-ext dout oeb qut15 24 23 22 21 20 serial data is captured at rising edge of this input. 4 strobe data strobe terminal for internal data latch. 24 vdd power supply terminal( 4.5v ~ 5.5v) 5~20 outn output terminal for external led. 21 oeb output enable input terminal. outn pin outputs when this input at ?l? level 22 dout serial data output terminal for external device s d9016 6 7 8 9 10 11 12 out1 out2 out3 out4 out5 out6 out7 out14 out13 out12 out11 out10 out9 out8 19 18 17 16 15 14 13 top view 22 dout serial data output terminal for external device . 23 r-ext input terminal for external resister the resister which connects between r-ext and gnd sets a output current on outn terminal. top view 5. equivalent circuit of input and output ssop24-150-0.64 sop24l -300-1.0 sop24 - 375-1.27 2 green gates semiconductor
6. block diagram lsd9016 16ch constant current led driver ** clock strobe oeb din out0~15 dout < truth table > h l dn dn dn-1 ------ dn-14 dn-15 dn-15 l l dn+1 no change dn-14 h l dn+2 dn+2 dn+1 ??.. dn-12 dn-13 dn-13 x h dn+3 all output s are off dn-13 green gates semiconductor
7. timing diagram lsd9016 16ch constant current led driver 1 2 13 14 15 0 clock strobe din oeb 1 2 13 14 15 0 output hold out0 off on off on off on out1 out2 strobe are level sensitive ( not edge triggered) dout previous data out15 off on strobe are level sensitive ( not edge triggered) . strobe = ?h? level, become transparent strobe =?l? level hold data oeb = ?h? level , all ouput are off. dout is to change on the rising edge of clock.. parameter symbol rating unit 8. electrical characteristics 8-1. absolute maximum ratings( ta = 25 ) parameter symbol rating unit supply voltage v dd 0 ~ 6 v output voltage v out -0.3 ~ 17 v input voltage v in -0.4 ~ vdd + 0.4 v output current i out 90 ma clock frequency f ck 25 mhz gnd terminal current i gnd 1440 ma power dissipation ( 2 layer pcb, ta = 25 ) p d 1.56(x24w)/1.31(x24s ) / 1.136(x24t ) w thermal resistance ( 2 layer pcb ta = 25 ) r th LSD9016-X24w = 80 / w LSD9016-X24s = 95 4 ( 2 layer pcb , ta = 25 ) LSD9016-X24t = 110 operating temperature t op -40 ~ 85 storage temperature t st -55 ~ 150 green gates semiconductor
8-2. recommended operating ratings( ta = 25 ) lsd9016 16ch constant current led driver parameter symbol condition min typ max unit supply voltage v dd -3.5 5.5v output voltage when led off v out(off) ---17v output voltage when led on v out(on) -0.7-4v high level logic input voltage v ih -2.0 vddv low level logic input voltage v il -gnd 0.8v high level dout output current i oh --1ma low level dout output current i ol -1ma output current LSD9016-X24s i out -5 90ma output current LSD9016-X24t i out -5 50ma operating temperature t op - -40 ~ 85 storage temperature t st - -55 ~ 150 strobe pulse width twstrobe vdd 45 55v 50 - - ns clock pulse width twclock 20 - - ns oeb pulse width twoeb 100 - - ns din s t ti tdin 5 vdd = 4 . 5 ~ 5 . 5v din s e t up ti me t s din 5 --ns din hold time thdin 10 - - ns strobe setup time tsstrobe 5 - - ns strobe hold time thstrobe 5 -- ns 5 strobe hold time thstrobe 5 ns clock frequency f ck cascade operation -- 25mhz green gates semiconductor
lsd9016 16ch constant current led driver 8-3. dc characteristics parameter symbol conditions min typ max unit high level logic output voltage v oh dout i oh = -1ma v dd - 0.4 --v low level logic output voltage v ol dout i ol = 1ma --0.4v high level logic input current i ih oeb, din, clock v in = v dd --1a low level logic input current i il strobe, din, clock v in = gnd ---1a i dd1 v out = 16v, no r ext , - 0.1 0.5 ma power supply current i dd1 clock = low, oeb = high 0.1 0.5 ma i dd2 r ext = 1.56k ? , all output off. --7.0ma i dd3 r ext = 500 ? , all output off. - - 14.0 ma i dd4 r ext = 1.56k ? , all output on. --7.0ma i dd5 r ext = 500 ? , all output on. - - 14.0 ma constant current output i o1 v dd = 5.0v, v out = 1.5v, r ext = 1.56k ? 11.28 12.0 12.72 ma i o2 v dd = 5.0v, v out = 1.5v, r ext = 500 ? 34.78 37.0 39.22 ma output off leak current i ok vout = 1.0v, r ext = 1.56k ? , all output off. --0.5a constant current error io out0 to out15 v dd = 5.0v, v out = 1.5v, r ext = 1.56k ? - 1 3 % out0 to out15 constant current power supply voltage regulation % v dd out0 to out15 v dd = 4.5~5.5v, v out = 1.5v, r ext = 1.56k ? - 1 4 %/v constant current output voltage regulation % v out out0 to out15 v dd = 5.0v, v out = 1.0~3.0v, r ext = 1.56k ? 1 4 %/v 6 pull-up resistor r up oeb 250 500 800 k ? pull-down resistor r down strobe 250 500 800 k ? green gates semiconductor
lsd9016 16ch constant current led driver 8-4. ac characteristics ( unl ess otherwise specified, ta = 25 vdd = 5v ) parameter symbol conditions min typ max unit clock-out0 tplh1 strobe = ?h?, oeb = ?l? - 25 100 strobe-out0 tplh2 oeb = ?l? - 25 100 oeb ? out0 tplh3 strobe = ?h? - 25 100 propagation delay time ns clock - dout tplh - 65 clock -out0 tphl1 strobe = ?h?, oeb = ?l? - 25 100 strobe-out0 tphl2 oeb = ?l? - 25 100 oeb ? out0 tphl3 strobe = ?h? - 25 100 clock ?dout tphl - 20 - output rise time tor 10 to 90% of voltage wave form - 30 150 ns output fall time tof 90 to 10% of voltage wave form - 70 150 ns 7 green gates semiconductor
lsd9016 16ch constant current led driver 9. application information < constent current > to keep supply constant current, lsd9016 provides minimum variation in current from channel to channel and chip to chip. the maximum current skew in each channel is less than 3% and less than 6% between ics where, ta = 25 vout = 1.5v vdd = 5v rext = 1.56k constant current ouput vs rext 70 80 90 100 a] constant current ouput vs rext 20 30 40 50 60 iout [m ? conditions : vout=1.5v , vdd=5.0v, ta=25?c ? this data is provided for reference only. 10 150 300 460 620 780 930 1100 1250 1400 1560 rext [ohm] < adjusting output current > all output current of lsd9016(iout) are setting by one external resistor at pin r-ext. the relative curve between iout and resistance r-ext is shown as the above figure and under table iout vs r_ext. also, the output current can be calculated from as below equation approximately. iout vref / r ext * 14.8 ( i out < 60ma ) where , vref = 1.22v ( ), iout vref / r ext * 13.2 (i out 60ma) where rext in ? is resistance of the external resister connected to r-ext terminal. < table ?iout vs r_ext? > i out ( ma ) r_ext( ) i out ( ma ) r_ext( ) 20 900 60 300 8 20 900 60 300 30 600 70 240 40 450 80 200 50 360 90 180 green gates semiconductor green gates semiconducto
lsd9016 16ch constant current led driver < package power dissipation(pd) > the maximum allowable package power dissipation is determined as pd(max) = (tj-ta)/rth when 16 output channels are turn on simultaneously, the operating package power dissipation is pd(op) = (idd x vdd) + (i out x duty x vout x 16) therefore, to keep pd(op) pd(max) nomally the allowable maximum output current ?i out? is determinated iout = { [ (tj- ta)/rth] ? ( idd x vdd) } / vout / duty / 16, where, the tj of lsd9016 is 150 (a1) iout = 90ma vout = 1.0v 16 channel outputs for sop24l type package, the thermal resistance is rth = 95( /w) 80 100 20 40 60 (a2) iout = 90ma vout = 1 0v 16 channel outputs 7d 7d 7d (a2) iout = 90ma vout = 1 . 0v 16 channel outputs for ssop24 type package, the thermal resistance is rth = 110( /w) 0 20 40 60 9 0 5% 10% 15% 20% 25% 30% 35% 40% 45% 50% 55% 60% 65% 70% 75% 80% 85% 90% 95% 100% ta = 25 ta = 55 ta = 85 green gates semiconductor
lsd9016 16ch constant current led driver (a2) iout =50ma vout = 1.0v 16 channel outputs for ssop24 type package, the thermal resistance is rth = 110( /w) 30 40 50 60 0 10 20 30 5 % 0 % 5 % 0 % 5 % 0 % 5 % 0 % 5 % 0 % 5 % 0 % 5 % 0 % 5 % 0 % 5 % 0 % 5 % 0 % 5 1 0 1 5 2 0 2 5 3 0 3 5 4 0 4 5 5 0 5 5 6 0 6 5 7 0 7 5 8 0 8 5 9 0 9 5 10 0 ta = 25 ta = 55 ta = 85 due to above curve, when ssop24 type package in operating iout(max) = 50ma LSD9016-X24t is adviced to choice duty cycle, around 65%. it should be sure to operate more safety. 10 green gates semiconductor
10. package dimension sop24 lsd9016 16ch constant current led driver all unit : mm sop24l 11 green gates semiconductor
10. package dimension ssop24 12 green gates semiconductor

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