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this is information on a product in full production. january 2013 doc id 18469 rev 4 1/26 26 stp16cpc26 low voltage 16-bit constant current led sink driver datasheet ? production data features 16 constant current output channels adjustable output current through external resistor output current: 5 ma to 90 ma 1% typical current accuracy bit to bit max clock frequency: 30 mhz 20 v current generators rated voltage 3 - 5.5 v power supply thermal shutdown for overtemperature protection applications video display panel led driver special lighting description the stp16cpc26 is a monolithic, low voltage, 16-bit constant current led sink driver. the device contains a 16-bit shift register and data latches, which convert serial input data into parallel output format. in the output stage sixteen regulated current generators provide 5 ma to 90 ma constant current to drive leds. the current is externally adjusted through a resistor. led brightness can be adjusted from 0% to 100% via oe pin. the stp16cpc26 guarantees a 20 v driving capability, allowing users to connect more leds in series to each current source. the high 30 mhz clock frequency makes the device suitable for high data rate transmission. the thermal shutdown (170c with about 15c hysteresis) assures protection from overtemperature events. the stp16cpc26 is housed in four different packages: qsop24, so-24, tssop-24 and htssop-24 (with exposed pad). so-24 tssop-24 tssop-24 (exposed pad) qsop24 table 1. device summary order codes package packaging STP16CPC26MTR so-24 1000 parts per reel stp16cpc26ttr tssop24 2500 parts per reel stp16cpc26xtr tssop24 exposed pad 2500 parts per reel stp16cpc26ptr qsop24 2500 parts per reel www.st.com
contents stp16cpc26 2/26 doc id 18469 rev 4 contents 1 pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 electrical ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2.1 absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2.2 thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4 simplified internal block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 5 typical application circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 6 equivalent circuits for inputs and outputs . . . . . . . . . . . . . . . . . . . . . . . 9 7 typical test circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 8 timing diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 9 current generators characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 9.1 current setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 9.2 current accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 9.3 generators voltage drop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 10 thermal shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 11 package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 12 revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
stp16cpc26 pin description doc id 18469 rev 4 3/26 1 pin description figure 2. pin connection note: the exposed-pad (if present) should be electrically connected to a metal land electrically isolated or connected to ground. $0y table 2. pin description pin n symbol name and function 1 gnd ground terminal 2 sdi serial data input terminal 3 clk clock input terminal 4 le latch input terminal 5-20 out 0-15 output terminal 21 oe input terminal of output enable (active low) 22 sdo serial data out terminal 23 r-ext input terminal of an external resistor for constant current programing 24 v dd supply voltage terminal
electrical ratings stp16cpc26 4/26 doc id 18469 rev 4 2 electrical ratings 2.1 absolute maximum ratings stressing the device above the rating listed in the ?absolute maximum ratings? table may cause permanent damage to the device. these are stress ratings only and operation of the device at these or any other conditions above those indicated in the operating sections of this specification is not implied. exposure to absolute maximum rating conditions for extended periods may affect device reliability. 2.2 thermal data table 3. absolute maximum ratings symbol parameter value unit v dd supply voltage 0 to 7 v v o output voltage -0.5 to 20 v i o output current 90 ma v i input voltage -0.4 to v dd +0.4 v i gnd gnd terminal current 1600 ma esd electrostatic discharge protection hbm human body model 2 kv f clk clock frequency 30 mhz table 4. thermal data symbol parameter value unit t a operating free-air temperature range -40 to +125 c t opr operating temperature range -40 to +150 t stg storage temperature range -55 to +150 r thja thermal resistance junction-case (1) 1. according with jedec standard 51-7b. so-24 60 c/w tssop24 85 tssop24 (2) 2. the exposed pad should be soldered directly to the pcb to realize the thermal benefits. 37.5 qsop24 72
stp16cpc26 electrical characteristics doc id 18469 rev 4 5/26 3 electrical characteristics v dd = 3.3 v - 5 v, t a = 25c, unless otherwise specified table 5. electrical characteristics symbol parameter test conditions min. typ. max. unit vdd supply voltage 3 5.5 v v ih input voltage high level 0.8*vdd - vdd v il input voltage low level gnd - 0.2*vdd v ol serial data output voltage (sdo) (1) i oh =- 1ma i ol =+ 1ma --0.4 v oh v dd -0.4 - - i oh output leakage current vo = 20v, outn = off - - 0.5 a i ol1 current accuracy channel to channel (2) (3) vds=0.3v, rext=900 , i ol = 22ma - 1 3 % i ol2 vds=0.6v, rext=360 , i ol = 55ma - 1 3 i ol3 current accuracy device to device (2) vds=0.3v, rext=900 , i ol = 22ma - - 6 % i ol4 vds=0.6v, rext=360 , i ol = 55ma - - 6 r in (up) pull-up resistor for oe pin 250 500 800 k r in (down) pull-down resistor for le pin 250 500 800 idd(off1) supply current (off) rext = open out 0 to 15 = off -37 ma idd(off2) rext = 900 out 0 to 15 = off -710 idd(off3) rext = 360 out 0 to 15 = off -1113.5 idd(on1) supply current (on) rext = 900 out 0 to 15 = on -711 idd(on2) rext = 360 out 0 to 15 = on -1115 %/dv ds output current vs. output voltage regulation (4) v ds from 1.0v to 3.0v io=22ma io=55ma -0.1-%/v %/dv dd output current vs. supply voltage regulation (4) io=22ma; v ds =0.3v io=55ma; v ds =0.6v -1-%/v tsd thermal shutdown - 170 - c tsd - hy thermal shutdown hysteresis (4) -1520 1. specification referred to t j from -40 c to +125 c. specific ation over the -40 to +125 c t j temperature range are assured by design, characterization and statistical correlation. 2. tested with just one output on. 3. iol+ = ((i olmax - i olmean )/ i olmean )*100, iol- = ((i olmin - i olmean )/ i olmean )*100, where i olmean = (i olout1 +i olout2 +?+i olout16 ) / 16 4. guaranteed by design.
electrical characteristics stp16cpc26 6/26 doc id 18469 rev 4 v dd = 3.3 v - 5 v, tj = 25c, unless otherwise specified table 6. switching characteristics symbol parameter conditions min. typ. max. unit f clk clock frequency - - 30 mhz t plh1 clk - outn propagation delay time (?l? to ?h?) vds = 0.8 v vih= vdd vil= gnd rext = 900 ohm rl = 50 ohm cl=10pf - 100 - ns t plh2 le - outn - 100 - t plh3 oe ? outn - 100 - t plha clk - sdo vdd=3.3v - 30 - t plhb vdd=5v - 20 - t phl1 clk - outn propagation delay time (?h? to ?l?) -28- t phl2 le - outn - 28 - t phl3 oe ? outn - 25 - t phla clk - sdo vdd=3.3v - 30 - t phlb vdd=5v - 20 - t w(clk) clk pulse width 20 - - t w(l) le 20 - - t w(oe) oe 150 - - t su (l) setup time for le 5 - - t h (l) hold time for le 5 - - t su (d) setup time for sdi 5 - - t h (d) hold time for sdi 10 - - tr (1) maximum clk rise time - - 5000 tf (1) maximum clk fall time - - 5000 t or1a output rise time of vout vih= vdd, vil= gnd vds = 0.8v, rl = 50 ohm cl=10pf , iout= 22ma vdd=3.3v - 95 - t or1b vdd=5v - 85 - t of1a output fall time of vout vdd=3.3v - 40 - t of1b vdd=5v - 25 - t or2a output rise time of vout vih= vdd, vil= gnd vds = 0.8v, rl = 50 ohm cl=10pf , iout= 55ma vdd=3.3v - 80 - t or2b vdd=5v - 70 - t of2a output fall time of vout vdd=3.3v - 40 - t of2b vdd=5v - 30 - i out-ov output current turn-on overshoot vds = 0.6 to 3v cl=10pf; iout= 5 to 60ma --0% 1. if devices are connected in cascade and tr or tf is large, it may be critical to achieve the timing required for data transfe r between two cascaded devices
stp16cpc26 simplified internal block diagram doc id 18469 rev 4 7/26 4 simplified internal block diagram figure 3. stp16cpc26 simplified block diagram 287 287 287 2( /( elw vkliw uhjlvwhu /dwfk dqg (qdeoh &rqwuro orjlf $qdorj vwdjh 6', &/. 6'2 7khupdo vkxwgrzq 5 (;7 287 287 287 2( /( elw vkliw uhjlvwhu /dwfk dqg (qdeoh &rqwuro orjlf $qdorj vwdjh 6', &/. 6'2 7khupdo vkxwgrzq 5 (;7 ".w
typical application circuit stp16cpc26 8/26 doc id 18469 rev 4 5 typical application circuit figure 4. typical application circuit $0y 6', &/. /( 2( 9'' 287 287 287 6xsso\yrowdjh 5(;7 &xuuhqwvhwwlqj uhvlvwru 'dwdordghg wkurxjkvhuldo lqwhuidfh 673&3& /('frpprqudloyrowdjh ? 6', &/. /( 2( 9'' 287 287 287 6xsso\yrowdjh 5(;7 &xuuhqwvhwwlqj uhvlvwru 'dwdordghg wkurxjkvhuldo lqwhuidfh 673&3& /('frpprqudloyrowdjh ?
stp16cpc26 equivalent circuits for inputs and outputs doc id 18469 rev 4 9/26 6 equivalent circuits for inputs and outputs input terminals le and oe have pull-down and pull-up connection respectively. clk and sdi must be connected to external circuit to fix the logic level. figure 5. oe terminal figure 6. le terminal $0y 2( n n 9 '' $0y /( 9 '' n n
equivalent circuits for inputs and outputs stp16cpc26 10/26 doc id 18469 rev 4 figure 7. clk, sdi terminal figure 8. sdo terminal $0y &/.6', n 9 '' $0y 9 '' 6'2 /(
stp16cpc26 typical test circuits doc id 18469 rev 4 11/26 7 typical test circuits figure 9 and figure 10 show respectively the typical test circuit used measuring electrical (e.g. input voltage high/low level, output leakage current, supply current, etc.) and switching characteristics (propagation delays, set-up and hold time, rise and fall time of v out , etc.). the resistor r l and capacitor c l in parallel connected to each output in figure 9 simulate a led behavior. figure 9. typical test circuit for electrical characteristics figure 10. typical test circuit for switching characteristics $0y 5 / & / )xqfwlrq *hqhudwru & / 9 / 9 ,+ 9 ,/ $0y
timing diagrams stp16cpc26 12/26 doc id 18469 rev 4 8 timing diagrams the timing diagram shown in figure 11 and the truth table in table 7 explain how to send data to the device. this can be summarized in the following points: le and oe are level sensitive and not synchronized with the clk signal when le is at low level, the latch circuit holds previous data if le is high level, data present in the shift register are latched when oe is at low level, the status of the outputs out0 to out15 depends on the data in the latch circuits with oe at high level, all outputs are switched off independently on the data stored in the latch circuits every rising edge of the clk signal, a new data on sdi pin is sampled. this data is loaded into the shift register, whereas a bit is shifted out from sdo. figure 11. timing diagram ? ? &/. 6', /( 2( 287 287 287 forfnf\fohvehiruhwkh/(sxovh /(sxovhodwfkhvwkhodvwelw ordghglqwrwkhvkliwuhjlvwhu + / + / + / 2)) 21 21 + / 6'2 2( orz hqdeohvwkhfxuuhqwjhqhudwruv grq ? wfduh ? ? &/. 6', /( 2( 287 287 287 forfnf\fohvehiruhwkh/(sxovh /(sxovhodwfkhvwkhodvwelw ordghglqwrwkhvkliwuhjlvwhu + / + / + / 2)) 21 21 + / 6'2 2( orz hqdeohvwkhfxuuhqwjhqhudwruv grq ? wfduh $0y
stp16cpc26 timing diagrams doc id 18469 rev 4 13/26 figure 12. timing for clock signal, serial-in and serial out data the correct sampling of the data depends on the stability of the data at sdi on the rising edge of the clock signal and it is assured by a proper data setup and hold time (t setup1 and t hold ), as shown in figure 12 . the same figure shows the propagation delay from clk to sdo (t plh /t phl ). figure 13 describes the setup times for le and oe signals (t setup2 and t setup3 respectively), the minimum duration of these signals (t wlat and t wena respectively) and the propagation delay from clk to out n , le to out n and oe to out n (t plh1 /t phl1 , t plh2 /t phl2 and t plh3 /t phl3 respectively). finally figure 14 defines the turn-on and turn-off time (t r and t f ) of the current generators. table 7. truth table clock le oe serial-in out0 ........... out7 .............. out15 (1) 1. outn = on when dn = h, outn = off when dn = l sdo h l dn dn ..... dn - 7 ..... dn -15 dn - 15 l l dn + 1 no change dn - 14 h l dn + 2 dn + 2 ..... dn - 5 ..... dn -13 dn - 13 x l dn + 3 dn + 2 ..... dn - 5 ..... dn -13 dn - 13 x h dn + 3 off dn - 13 $0y
timing diagrams stp16cpc26 14/26 doc id 18469 rev 4 figure 13. timing for clock signal serial-in data, latch enable, output enable and outputs figure 14. outputs $0y $0y
stp16cpc26 current generators characteristics doc id 18469 rev 4 15/26 9 current generators characteristics 9.1 current setting the current of all outputs is programmed through an external resistor connected to r-ext pin, as shown in figure 15 . the curve in figure 16 describes the relation between the current and the resistor connected to r-ext pin, whereas the table 8 shows how to set some typical current values. figure 15. resistor for current programming figure 16. output current vs r-ext resistor table 8. recommended values of rext for some output current value output current [ma] r ext [ ? ] closer standard value (e24 series) [ ? ] 5 4129 4300 10 2005 200 20 999 1000 40 471 470 60 322 330 90 217 220 $0y 5(;7 5 h[w 5(;7 5 h[w 5h[w> @ 2xwsxwfxuuhqw>p$@ $0y
current generators characteristics stp16cpc26 16/26 doc id 18469 rev 4 9.2 current accuracy a typical current accuracy of 1% (3% maximum) between channels is guaranteed at 22 ma and 55 ma output current (refer to ta ble 6 ) and 6% (maximum) current accuracy between ics. 9.3 generators voltage drop in order to correctly regulate the current, a minimum dropout voltage must be assured across the current generators. figure 17 and table 9 provides just an indicative idea about the dropout voltage to assure over the current range. however it is recommended to use value of v drop slightly higher than those indicated in figure 17 and tab le 9 . figure 17. dropout voltage vs output current table 9. dropout voltage vs output current output current [ma] v drop @ 3.3v [mv] v drop @ 5v [mv] 54444 10 85 85 20 170 170 40 350 330 60 530 500 90 820 770 $0y 0lqlpxpgursrxwyrowdjh>9@ 2xwsxwfxuuhqw>p$@ 9gursyvrxwsxwfxuuhqw
stp16cpc26 thermal shutdown doc id 18469 rev 4 17/26 10 thermal shutdown the stp16cpc26 is featured with a thermal shutdown. this protection is triggered if the junction temperature reaches 170c. when the thermal shutdown is activated, all outputs are turned off independently on the data latched. once the temperature decreases (thermal shutdown hysteresis is typically 15c), the outputs are enabled again and the device keeps on working.
package mechanical data stp16cpc26 18/26 doc id 18469 rev 4 11 package mechanical data in order to meet environmental requirements, st offers these devices in different grades of ecopack ? packages, depending on their level of environmental compliance. ecopack? specifications, grade definitions and product status are available at: www.st.com. ecopack ? is an st trademark. table 10. qsop-24 mechanical data dim. mm. inch min typ max min typ max a 1.54 1.62 1.73 0.061 0.064 0.068 a1 0.1 0.15 0.25 0.004 0.006 0.010 a2 1.47 0.058 b 0.31 0.2 0.012 0.008 c 0.254 0.17 0.010 0.007 d 8.56 8.66 8.76 0.337 0.341 0.345 e 5.8 6 6.2 0.228 0.236 0.244 e1 3.8 3.91 4.01 0.150 0.154 0.158 e 0.635 0.025 l 0.4 0.635 0.89 0.016 0.025 0.035 h 0.25 0.33 0.41 0.010 0.013 0.016 < 8 0
stp16cpc26 package mechanical data doc id 18469 rev 4 19/26 figure 18. qsop-24 package dimensions
package mechanical data stp16cpc26 20/26 doc id 18469 rev 4 figure 19. tssop24 package dimensions table 11. tssop24 mechanical data dim. mm. inch min typ max min typ max a 1.1 0.043 a1 0.05 0.15 0.002 0.006 a2 0.9 0.035 b 0.19 0.30 0.0075 0.0118 c 0.09 0.20 0.0035 0.0079 d 7.7 7.9 0.303 0.311 e 4.3 4.5 0.169 0.177 e 0.65 bsc 0.0256 bsc h 6.25 6.5 0.246 0.256 k 0 8 0 8 l 0.50 0.70 0.020 0.028
stp16cpc26 package mechanical data doc id 18469 rev 4 21/26 figure 20. reel dimensions table 12. tape and reel tssop24 dim. mm. inch min typ max min typ max a - 330 - 12.992 c 12.8 - 13.2 0.504 - 0.519 d 20.2 - 0.795 - n 60 - 2.362 - t - 22.4 - 0.882 ao 6.8 - 7 0.268 - 0.276 bo 8.2 - 8.4 0.323 - 0.331 ko 1.7 - 1.9 0.067 - 0.075 po 3.9 - 4.1 0.153 - 0.161 p 11.9 - 12.1 0.468 - 0.476
package mechanical data stp16cpc26 22/26 doc id 18469 rev 4 figure 21. so-24 package dimensions table 13. so-24 mechanical data dim. mm. inch min typ max min typ max a 2.65 0.104 a1 0.1 0.2 0.004 0.008 a2 2.45 0.096 b 0.35 0.49 0.014 0.019 b1 0.23 0.32 0.009 0.012 c 0.5 0.020 c1 45(typ.) d 15.20 15.60 0.598 0.614 e 10.00 10.65 0.393 0.419 e 1.27 0.050 e3 13.97 0.550 f 7.40 7.60 0.291 0.300 l 0.50 1.27 0.020 0.050 s (max.) 8
stp16cpc26 package mechanical data doc id 18469 rev 4 23/26 figure 22. reel dimensions table 14. tape and reel so-24 dim. mm. inch min typ max min typ max a - 330 - 12.992 c 12.8 - 13.2 0.504 - 0.519 d 20.2 - 0.795 - n 60 - 2.362 - t - 30.4 - 1.197 ao 10.8 - 11.0 0.425 - 0.433 bo 15.7 - 15.9 0.618 - 0.626 ko 2.9 - 3.1 0.114 - 0.122 po 3.9 - 4.1 0.153 - 0.161 p 11.9 - 12.1 0.468 - 0.476
package mechanical data stp16cpc26 24/26 doc id 18469 rev 4 figure 23. tssop24 dimensions table 15. tssop24 exposed pad dim. mm inch min typ max min typ max a 1.2 0.047 a1 0.15 0.004 0.006 a2 0.8 1 1.05 0.031 0.039 0.041 b 0.19 0.30 0.007 0.012 c 0.09 0.20 0.004 0.0089 d 7.7 7.8 7.9 0.303 0.307 0.311 d1 4.7 5.0 5.3 0.185 0.197 0.209 e 6.2 6.4 6.6 0.244 0.252 0.260 e1 4.3 4.4 4.5 0.169 0.173 0.177 e2 2.9 3.2 3.5 0.114 0.126 0.138 e 0.65 0.0256 k 0 8 0 8 l 0.45 0.60 0.75 0.018 0.024 0.030
stp16cpc26 revision history doc id 18469 rev 4 25/26 12 revision history table 16. document revision history date revision changes 04-mar-2011 1 first release 05-apr-2011 2 updated table 6 19-jul-2012 3 updated table 7 . 29-jan-2013 4 updated characteristics in table 5: electrical characteristics and table 6: switching characteristics . minor text changes.
stp16cpc26 26/26 doc id 18469 rev 4 please read carefully: information in this document is provided solely in connection with st products. stmicroelectronics nv and its subsidiaries (?st ?) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described he rein at any time, without notice. all st products are sold pursuant to st?s terms and conditions of sale. purchasers are solely responsible for the choice, selection and use of the st products and services described herein, and st as sumes no liability whatsoever relating to the choice, selection or use of the st products and services described herein. no license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted under this document. i f any part of this document refers to any third party products or services it shall not be deemed a license grant by st for the use of such third party products or services, or any intellectual property contained therein or considered as a warranty covering the use in any manner whatsoev er of such third party products or services or any intellectual property contained therein. unless otherwise set forth in st?s terms and conditions of sale st disclaims any express or implied warranty with respect to the use and/or sale of st products including without limitation implied warranties of merchantability, fitness for a particular purpose (and their equivalents under the laws of any jurisdiction), or infringement of any patent, copyright or other intellectual property right. unless expressly approved in writing by two authorized st representatives, st products are not recommended, authorized or warranted for use in military, air craft, space, life saving, or life sustaining applications, nor in products or systems where failure or malfunction may result in personal injury, death, or severe property or environmental damage. st products which are not specified as "automotive grade" may only be used in automotive applications at user?s own risk. resale of st products with provisions different from the statem ents and/or technical features set forth in this document shall immediately void any warranty granted by st for the st product or service described herein and shall not create or extend in any manner whatsoev er, any liability of st. st and the st logo are trademarks or register ed trademarks of st in various countries. information in this document supersedes and replaces all information previously supplied. the st logo is a registered trademark of stmicroelectronics. all other names are the property of their respective owners. ? 2013 stmicroelectronics - all rights reserved stmicroelectronics group of companies australia - belgium - brazil - canada - china - czech republic - finland - france - germany - hong kong - india - israel - ital y - japan - malaysia - malta - morocco - philippines - singapore - spain - swed en - switzerland - united kingdom - united states of america www.st.com

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