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?W@^?I? 9 ? 7 ? 1 silicon touch technology inc . 9-7f-1, prosperity road i, science based industrial park, hsin-chu, taiwan 300, r.o.c. tel 886-3-5645656 fax 886-3-5645626 DM11A version : a.003 issue date : 2008/03/10 file name : sp-DM11A-a.003.doc total pages : 20 8-bit constant current led driver
c???? silicon touch technology inc . 8-bit constant current led driver version:a.003 page 1 ??u}u??_??????P? unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. DM11A DM11A 8-bit constant current led driver general description DM11A is a constant-current sink dr iver specifically designed for led display applications. the device incorporates shift registers, data latc hes, and constant curren t circuitry on the silicon cmos chip. the maximum output curre nt value of all 8 channels is adjustable by a single external resistor. features z constant-current outputs: 3ma to 60ma adjustable by one external resistor z maximum output voltage: 17v z maximum clock frequency: 25mhz z power supply voltage: 3.3v to 5v z in-rush current control z output slew rate contro l (tr/tf, over/under shoot) z bit-to-bit skew : 3 % (max.) chip-to-chip skew : 6 % (max.) z package and pin assignment compatible to conventional led drivers (dm114/5/6) applications z indoor/outdoor led video display z led variable message signs (vms) system package types z pdip16, sop16, sop16b, ssop16
c???? silicon touch technology inc . 8-bit constant current led driver version:a.003 page 2 ??u}u??_??????P? unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. DM11A block diagram shift register [0] shift register [1] shift register [7] latch register [0] latch register [1] latch register [7] constant-current driver [0] constant-current driver [1] constant-current driver [7] delay unit [0] delay unit [1] delay unit [7] dai dck lat en vdd gnd out 0 out 7 dao rext out 1
c???? silicon touch technology inc . 8-bit constant current led driver version:a.003 page 3 ??u}u??_??????P? unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. DM11A pin connection pin description pin no. pin name function 1 gnd ground terminal. 2 dai serial data input terminal. 3 dck synchronous clock input terminal for serial data transfer. data is sampled at the rising edge of dck. 4 lat input terminal of data strobe. data on shift register goes through at the high level of lat (level trigger). otherwise, data is latched. 5~12 out0~7 sink constant-current outputs (open-drain). 13 en output enable terminal: ?h? for all outputs are turned off , ?l? for all outputs are active. 14 dao serial data output terminal. 15 rext external resistors connected between rext and gnd for output current value setting. 16 vcc supply voltage terminal.
c???? silicon touch technology inc . 8-bit constant current led driver version:a.003 page 4 ??u}u??_??????P? unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. DM11A equivalent circuit of inputs and outputs 1. dck, dai, lat, en terminals 2. dao terminals
c???? silicon touch technology inc . 8-bit constant current led driver version:a.003 page 5 ??u}u??_??????P? unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. DM11A maximum ratings (ta=25 c, tj(max) = 120 c) characteristic symbol rating unit supply voltage vdd -0.3 ~ 7.0 v input voltage vin -0.3 ~ vdd+0.3 v output current iout 60 ma output voltage vout -0.3 ~ 17 v input clock frequency fdck 25 mhz gnd terminal current ignd 1500 ma 1.12 ( pdip16 : ta=25 c) 1.17 ( sop16 : ta=25 c) 1.06 ( sop16b : ta=25 c) power dissipation (4 layer pcb) pd 0.82 ( ssop16 : ta=25 c) w 85.0 (pdip16 ) 81.2 (sop16 ) 90 (sop16b ) thermal resistance rth(j-a) 115.9 (ssop16 ) c/w operating temperat ure top -40 ~ 85 c storage temperature tstg -55 ~ 150 c recommended operating condition characteristic symbol condition min. typ. max. unit supply voltage vdd ? 3.3 5.0 5.5 v output voltage vout driver on *1 1.0 ? 0.5vdd output voltage vout driver off *2 ? ? 17 v io outn 5 ? 60 ioh voh = vdd ? 0.2 v ? ? + 1.2 output current iol vol = 0.2 v ? ? - 1.4 ma vih 0.8vdd ? vdd input voltage vil vdd = 3.3 v ~ 5.5v 0.0 ? 0.2vdd v input clock frequency fdck single chip operation ? ? 25 mhz lat pulse width tw lat 15 ? ? dck pulse width tw dck 15 ? ? set-up time for dai tsetup(d) 10 ? ? hold time for dai thold(d) 10 ? ? set-up time for lat tsetup(l) 10 ? ? hold time for lat thold(l) vdd = 5.0v 10 ? ? ns *1 notice that the power dissipation is limited to its package and ambient temperature. *2 the driver output voltage including any overshoot stress has to be compliant with the maximum voltage (17v).
c???? silicon touch technology inc . 8-bit constant current led driver version:a.003 page 6 ??u}u??_??????P? unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. DM11A electrical characteristics (vdd = 5.0 v, ta = 25 c unless otherwise noted) characteristic symbol condition min. typ. max. unit input voltage ?h? level vih cmos logic level 0.8vdd ? vdd input voltage ?l? level vil cmos logics2 level gnd ? 0.2vdd v output leakage current iol voh = 17 v ? ? 1.0 ua vol iol = 1.5 ma ? ? 0.2 output voltage (dao) voh ioh= 1.4 ma vdd-0.2 ? ? v output current skew (channel-to-channel) *1 iol1 ? ? 3 % output current skew (chip-to-chip) *2 iol2 vout = 1.0 v rrext = 2.2k 6 % output voltage regulation % / vout rrext = 2.2k vout = 1 v ~ 3 v ? 0.1 0.5 supply voltage regulation % / vdd rrext = 2.2 k ? 1 4 % / v i dd(off) power on all pins are open unless vdd and gnd 2 3 4 i dd(off) input signal is static rrext = 2.9 k all outputs turn off 4 5 6 i dd(on) input signal is static rrext = 2.9 k all outputs turn on 4 5 6 i dd(off) input signal is static rrext = 1.05k all outputs turn off 8 9 10 supply current *3 i dd(on) input signal is static rrext = 1.05k all outputs turn on 8 9 10 ma *1 channel-to-channel skew is defined as the ratio between (any iout ? average iout) an d average iout, where average iout = (imax + imin) / 2. *2 chip-to-chip skew is defined as the range into which any output current of any ic falls. *3 io excluded.
c???? silicon touch technology inc . 8-bit constant current led driver version:a.003 page 7 ??u}u??_??????P? unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. DM11A switching characteristics (vdd = 5.0v, ta = 25 c unless otherwise noted) characteristic symbol condition min. typ. max. unit en-to-out0 46 52 58 lat-to-out0 48 49 50 propagation delay ( ? l ? to ? h ? ) dck-to-dao tplh 19 20 21 en-to-out0 19 22 32 lat-to-out0 72 75 79 propagation delay ( ? h ? to ? l ? ) dck-to-dao tphl 19 19.5 21 output current rise time tor 31 33.5 36 output current fall time tof 5 6 7 output delay time (out (n) -to-out (n+1) ) tod vih = vdd vil = gnd rrext = 2.2k vl = 5.0 v cl *1 = 13 pf 4 5 9 ns switching characteristics (vdd = 3.3v, ta = 25 c unless otherwise noted) characteristic symbol condition min. typ. max. unit en-to-out0 46 51 57 lat-to-out0 20 21.5 23 propagation delay ( ? l ? to ? h ? ) dck-to-dao tplh 11 12 13 en-to-out0 22 23 24 lat-to-out0 46 49 53 propagation delay ( ? h ? to ? l ? ) dck-to-dao tphl 11 11.5 12 output current rise time tor 31 35 39 output current fall time tof 9 10 11 output delay time (out (n) -to-out (n+1) ) tod vih = vdd vil = gnd rrext = 2.2k vl = 5.0 v cl *1 = 13 pf 5 10 11 ns *1 cl means the probe capacitance of oscilloscope.
c???? silicon touch technology inc . 8-bit constant current led driver version:a.003 page 8 ??u}u??_??????P? unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. DM11A timing diagram 1. dck-dai, dao 2. dck-lat 3. lat-out0
c???? silicon touch technology inc . 8-bit constant current led driver version:a.003 page 9 ??u}u??_??????P? unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. DM11A 4. en-out0 5. out n+1 -out n
c???? silicon touch technology inc . 8-bit constant current led driver version:a.003 page 10 ??u}u??_??????P? unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. DM11A constant-current output constant-current value of each out put channel is set by an extern al resistor connected between the rext pin and gnd. varying the resistor value can adjust the current scale ranging from 3ma to 60ma. the reference voltage of rext terminal (vrext) is approximately 1.25v. the output current value is calculated roughly by the following equation : iout(ma) 5 10 20 30 40 50 m 48.85 48.15 47 46 44.88 43.43 output current as a function of rrext value 0 5 10 15 20 25 30 35 40 45 50 55 60 012345678910111213141516171819202122 rext k iout( ma) output current as a f unction of output voltage 0 5 10 15 20 25 30 35 40 45 50 55 60 0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 2.2 2.4 2.6 2.8 3 vout(v) iout(ma) in order to obtain a good performance of consta nt-current output, a suitable output voltage is necessary. users can get related informati on about the minimum output voltage above. iout (ma) ~ v rext (v) r rext (k ) m
c???? silicon touch technology inc . 8-bit constant current led driver version:a.003 page 11 ??u}u??_??????P? unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. DM11A serial data interface the serial-in data (dai) will be clocked into 8 bit shift register synchronized on the rising edge of the clock (dck). the data ? 1 ? represents the corresponding current output ? on ? , while the data ? 0 ? stands for ? off ? . the data will be transferred into the 8 bit latch register when the strobe signal (lat) is ? h ? (level trigger); otherwise, the data will be held. the trigger timing of the serial-out data (dao) will be shifted out on synchr onization to the rising edge of th e clock. all outputs are turned off while enable terminal (en) is kept at high le vel. and they are active when en shifts to low.
c???? silicon touch technology inc . 8-bit constant current led driver version:a.003 page 12 ??u}u??_??????P? unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. DM11A outputs delay large in-rush currents will occur when the system activates all the outputs at once. to reduce this effect, DM11A is designed to have a constant unit of delay (around 2.5ns) betw een outputs. the delay sequence for every output goes like this: out0 (no delay) ? out7 ? out1 ? out6 ? out2 ? out5 ? out3 ? out4 (the largest delay). global brightness control dm13a has no built-in global bright ness control feature. in orde r to obtain a lower resolution of global brightness control effect, two methods could be utilized. one is providing pwm signal synchronized on latch pulse to modula te the output enable terminal (e n pin). the other is to adjust the rrext value or voltage drop across the external resistor. please see the reference circuit below:
c???? silicon touch technology inc . 8-bit constant current led driver version:a.003 page 13 ??u}u??_??????P? unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. DM11A power dissipation the power dissipation of a semiconductor chip is limited to its package and ambient temperature, in which the device requires the maximum output current calculated for given operating conditions. the maximum allowable pow er consumption can be calculated by the following equation: pd(max)(watt) = tj(junction temperature)(max)( c) C ta(ambient temperature)( c) rth(junction-to-air thermal resistance)( c/watt) the relationship between power dissipation and opera ting temperature can be referred to the figure below: 0 0.5 1 1.5 2 0 20 40 60 80 100 120 140 160 ambient temperature ta() power dissipation pd(w) the power consumption of ic can be determined by the following equation and should be less than the maximum allowable power dissipation: pd(max)(w) pd(w) = v cc (v) i dd (a) + vout0 iout0 duty0 + + vout7 iout7 duty7 < rth(sop16)=81.2 c/w rth(pdip16)=85.0 c/w rth(sop16b)=90 c/w rth(ssop16)=115.9 c/w sop16 sop16b ssop16 pdip16
c???? silicon touch technology inc . 8-bit constant current led driver version:a.003 page 14 ??u}u??_??????P? unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. DM11A typical application
c???? silicon touch technology inc . 8-bit constant current led driver version:a.003 page 15 ??u}u??_??????P? unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. DM11A package outline dimension pdip16 dimension in mm dimension in inch symbol min typ max min typ max a - - 5.334 - - 0.21 a1 0.381 - - 0.015 - - a2 3.175 3.302 3.429 0.125 0.130 0.135 b 1.300 1.500 1.700 0.05118 0.059 0.06693 b1 0.400 0.480 0.560 0.01575 0.019 0.02205 d 18.669 19.495 20.320 0.735 0.768 0.8 e 7.366 7.620 7.874 0.29 0.300 0.31 e1 6.223 6.812 7.400 0.245 0.268 0.29134 e 2.290 2.540 2.790 0.09016 0.100 0.10984 eb 8.509 9.017 9.525 0.335 0.355 0.375 l 2.540 3.175 3.810 0.1 0.125 0.15 s - - 1.120 - - 0.04409 0 7 15 0 0.276 0.59055 e1 e b1 a1 e a s a2 l seating b eb d
c???? silicon touch technology inc . 8-bit constant current led driver version:a.003 page 16 ??u}u??_??????P? unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. DM11A package outline dimension ssop16 dimension in mm dimension in inch symbol min typ max min typ max a 1.346 - 1.753 0.053 - 0.069 a1 0.102 - 0.254 0.004 - 0.010 a2 1.245 - 1.499 0.049 - 0.059 b 0.203 - 0.305 0.008 - 0.012 c 0.178 - 0.254 0.007 - 0.010 d 4.801 4.902 5.004 0.189 0.193 0.197 e 5.791 5.994 6.198 0.228 0.236 0.244 e 0.635 bsc 0.635 bsc e1 3.810 3.912 3.988 0.150 0.154 0.157 l 0.406 - 1.270 0.016 - 0.050 0 - 8 0 - 8
c???? silicon touch technology inc . 8-bit constant current led driver version:a.003 page 17 ??u}u??_??????P? unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. DM11A package outline dimension sop16b (300mil) dimension in mm dimension in inch symbol min typ max min typ min a 2.362 - 2.642 0.093 - 0.104 a1 0.102 - 0.305 0.004 - 0.012 b 0.406 bsc 0.406 bsc c 0.203 bsc 0.203 bsc d 10.109 - 10.490 0.398 - 0.413 e 7.391 - 7.595 0.291 - 0.299 e 1.270 bsc 1.270 bsc h 10.008 - 10.643 0.394 - 0.419 l 0.406 - 1.270 0.016 - 0.050 0 - 8 0 - 8
c???? silicon touch technology inc . 8-bit constant current led driver version:a.003 page 18 ??u}u??_??????P? unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. DM11A package outline dimension sop16 (exposed pad) dimension in mm dimension in inch symbol min typ max min typ max a 1.346 - 1.753 0.053 - 0.069 a1 0.051 - 0.152 0.002 - 0.006 b 0.406 bsc 0.406 bsc c 0.203 bsc 0.203 bsc d 9.804 - 10.008 0.386 - 0.394 e 3.810 - 3.988 0.150 - 0.157 e 1.270 bsc 1.270 bsc h 5.791 - 6.198 0.228 - 0.244 l 0.406 - 1.270 0.016 - 0.050 0 - 8 0 - 8 pad size1 (9518e) e1 1.930 - 2.413 0.076 - 0.095 d1 3.658 - 4.572 0.144 - 0.180
c???? silicon touch technology inc . 8-bit constant current led driver version:a.003 page 19 ??u}u??_??????P? unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. DM11A the products listed herein are designed for ordinary electronic a pplications, such as electrical appliances, audio-visual equipment, communicat ions devices and so on. hence, it is advisable that the devices should not be used in medical instruments, surgical implants, aerospace machinery, nuclear power control systems, disaster/crime-prevention equipment and the like. misusi ng those products may directly or indirectly endanger human life, or cause injury and property loss. silicon touch technology, inc. will not take any responsibilities regarding the misusage of the products mentioned above. anyone who purchases any products described herein with the above-mentioned intention or with such misused applica tions should accept full responsibility and indemnify. silicon touch technology, inc. and its distributors and all their officers and employees shall defend jointl y and severally against any and all claims and litigation and all damages, cost and expe nses associated with such intention and manipulation.

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