View DM132_2299068.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

DM132 version : a.014 issue date : 2007/02/26 file name : sp-DM132-a.014.doc total pages : 24 16-channel pwm-controlled constant current driver for led displays ?W@^?I? 9?7?1 silicon touch technology inc . 9-7f-1, prosperity road i, science based industrial pard, hsin-chu, taiwan 300, r.o.c tel 886-3-5645656 fax 886-3-5645626
c???? silicon touch technology inc. DM132 DM132 version a.014 page 1 DM132 16-channel pwm-controlled constant current driver for led displays general description the DM132 is a led driver incorporating shift register s, data latches, 16-channel constant current circuitry with current value set by an external resistor, 1024 gray level pwm (pulse width modulation) functional unit and time division cap ability. each channel can provide a maximum current of 60 ma. time division operation allows driving up to 1 or 2 leds with a single output channel (mode-1 and mode-2 respectively). features ? constant current outputs with current value settings by an external resistor ? maximum output current: 60 ma ? time division output allows the drivi ng of 1 or 2 leds with a single output ? maximum / minimum output voltage: 20v / 1.1v ? 10 bits luminance data with pwm current outputs ? serial shift-in architecture for lumi nance data in time division mode 1 and mode 2
c???? silicon touch technology inc. DM132 DM132 version a.014 page 2 block diagram. figure 1. functional block diagram operation control pwm counter voltage reference driver (16-channel) comparator (16-channel) shift register and latch (10 bit 16-channel 2led) rex t gclk cmd[2:0] dclk din iout0 iout15 ?? dout
c???? silicon touch technology inc. DM132 DM132 version a.014 page 3 pin connection (sdip28 / sop28 / ssop28 top view) pin assignment (sdip28 / sop28) pin no. name pin no. name 1 iout2 15 iout14 2 iout3 16 iout15 3 iout4 17 gnd 4 iout5 18 dout 5 iout6 19 gclk 6 iout7 20 dclk 7 ignd 21 rext 8 ignd 22 cmd[2] 9 iout8 23 cmd[1] 10 iout9 24 cmd[0] 11 iout10 25 din 12 iout11 26 vdd 13 iout12 27 iout0 14 iout13 28 iout1
c???? silicon touch technology inc. DM132 DM132 version a.014 page 4 pin connection (qfn32 bottom view) pin assignment (qfn32) pin no. name pin no. name pin no. name 1 din 12 ignd 23 gnd 2 vdd 13 ignd 24 dout 3 iout0 14 ignd 25 gclk 4 iout1 15 iout8 26 dclk 5 iout2 16 iout9 27 rext 6 iout3 17 iout10 28 ignd 7 iout4 18 iout11 29 ignd 8 iout5 19 iout12 30 cmd[2] 9 iout6 20 iout13 31 cmd[1] 10 iout7 21 iout14 32 cmd[0] 11 ignd 22 iout15 thermal pad ignd iout2 vdd iout0 din iout11 dout iout15 iout14 gnd iout3 iout4 iout5 iout10 iout12 iout13 iout1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 iout8 iout9 ignd ignd ignd ignd iout6 iout7 thermal pad dcl k gclk ignd rext cmd[1] cmd[0] ignd cmd[2]
c???? silicon touch technology inc. DM132 DM132 version a.014 page 5 pin description name pin no. i/o description cmd[2:0] sdip/sop: 22, 23, 24 qfn: 30, 31, 32 i encoded commands for data transfer, time division operation and pwm display: cmd[2:0] command [000]: mode-1 time division operation / no operation for display [001]: mode-2 time division operation / no operation for display [010]: data transfer enable (shift-in) [011]: data latch strobe (capture) [100]: first led emitting [101]: second led emitting [110]: led emitting disable / iout disable (stop) [111]: test mode cmd commands are latched at the rising edges of dclk. din sdip/sop: 25 qfn: 1 i serial input for luminance dat a (time division mode-1/2) dout sdip/sop: 18 qfn: 24 o serial output for luminance data (time division mode-1/2) dclk sdip/sop: 20 qfn: 26 i synchronous clock input for command and serial data transfer. the data input of di n is synchronous to rising edges of dclk. gclk sdip/sop: 19 qfn: 25 i clock input for pwm operation iout0-15 sdip/sop: 27, 28, 1, 2, 3, 4, 5, 6, 9, 10, 11, 12, 13, 14, 15, 16 qfn: 3, 4, 5, 6, 9, 10, 15, 16, 17, 18, 19, 20, 21, 22 o led driver outputs rext sdip/sop: 21 qfn: 27 o driver current setting. led current is set to a current value by connecting an exter nal resistor between rext and gnd. vdd sdip/sop: 26 qfn: 2 - power supply gnd sdip/sop: 17 qfn: 23 - analog and digital ground ignd sdip/sop: 7, 8 qfn: 11, 12, 13, 14, 28, 29, thermal pad - ground-pin for driver outputs
c???? silicon touch technology inc. DM132 DM132 version a.014 page 6 maximum ratings (ta = 25 c) characteristic symbol rating unit supply voltage v dd -0.3 ~ 7 v input voltage range v in -0.3 ~ dv dd +0.3 v driver output voltage range v out -0.3 ~ 20 v driver output current i out 0 ~ 60 ma ground thermal current i gnd 960 ma power dissipation p d 2.50, sdip28 1.32, sop28 0.88, ssop28 2.92, qfn32 (t a = 50 or less) w thermal resistance ja 40.0, sdip28 75.9, sop28 113.3, ssop28 34.2, qfn32 / w operating temperature range t op -40 ~ 85 storage temperature range t stg -55 ~ 150 recommended operating conditions dc characteristics (ta = 25 c) parameter symbol conditions min nom max unit supply voltage v dd - 2.7 5 5.5 v driver output voltage when driver on v out - 1.1 - 5 v driver output voltage when driver off 1 v out - 0 - 20 v driver output current i out outn 5 - 60 ma high-level output current i oh serial-out - - -1 ma low-level output current i ol serial-out - - 1 ma high-level input voltage v ih - 0.8v dd - v dd +0.2 v low-level input voltag v il - -0.2 - 0.2 dv dd v operating free-air temperature 2 t op - -20 - 80 ac characteristics (v dd = 5.0 v, ta = 25 c) parameter symbol conditions min nom max unit dclk clock frequency f dclk - - - 20 mhz dclk pulse duration t wh / t wl high or low level 20 - - ns dclk rise/fall time t r / t f - - - 40 ns gclk clock frequency f gclk - - - 20 mhz gclk pulse duration t wh / t wl high or low level 15 - - ns gclk rise/fall time t r /t f - - - 20 ns setup time t su cmd to dclk din to dclk dclk to cmd 25 25 25 - - ns hold time t h / t wh cmd to dclk din to dclk dclk to cmd 25 25 25 - - ns 1. the driver output voltage including any overshoot stress has to be compliant with the maximum voltage (17v). 2. recommended junction temperature range is from ?20 to 150 .
c???? silicon touch technology inc. DM132 DM132 version a.014 page 7 electrical characteristics (v dd = 5.0v, ta = 25 c) parameter symbol conditions min nom max unit high-level digital output voltage v oh - v dd -0.5 - - v low-level digital output voltage v ol - - - 0.5 v input current i i - - - 1 a supply current (digital) i dd(digital) dclk = 1mhz gclk = 1mhz - 1 1.5 ma supply current (analog) i dd(analog) rext = 3k - 10.4 11.2 ma voltage reference v rext rext = 2k ? 1.200 1.228 1.255 v driver output leakage current i ol v oh = 17v - - 1 a driver current skew between channels i ol1 v out = 1v, i = 5ma - 2 4 % driver current skew between chips i ol2 v out = 1v, i = 5ma - 5 7 % supply voltage regulation % / v dd rext = 3k ? - - 2 % / v switching characteristics (v dd = 5.0v, ta = 25 c) characteristic symbol conditions min. typ. max. unit dout rise time t r - 12 14 ns dout fall time t f - 9 11 ns dout propagation delay (l to h) t plh - 22 23 ns dout propagation delay (h to l) t phl vih=vdd vil=gnd rext=3k cl=13pf - 21 22 ns iout rise time t r - 23 25 ns iout fall time t f - 22 24 ns iout propagation delay after gclk (l to h / off to on) t plh - 17 19 ns iout propagation delay after gclk (h to l / on to off) t phl vih=vdd vil=gnd rext=3k vled=5.0v rl=120 cl=33pf - 17 19 ns switching characteristics (v dd = 3.3v, ta = 25 c) characteristic symbol conditions min. typ. max. unit dout rise time t r - 12 14 ns dout fall time t f - 9 11 ns dout propagation delay (l to h) t plh - 25 26 ns dout propagation delay (h to l) t phl vih=vdd vil=gnd rext=3k cl=13pf - 23 24 ns iout rise time t r - 41 43 ns iout fall time t f - 24 26 ns iout propagation delay after gclk (l to h / off to on) t plh - 20 22 ns iout propagation delay after gclk (h to l / on to off) t phl vih=vdd vil=gnd rext=3k vled=5.0v rl=120 cl=33pf - 24 26 ns
c???? silicon touch technology inc. DM132 DM132 version a.014 page 8 typical control method 1) command sequence to manipulate DM132, we should properly cont rol the cmd, din, dclk, and gclk as following steps: 1. issue command ? shift-in ?, and then enter luminance data din. note that DM132 starts to shift-in data at the dclk ri sing edge next to the edge which latched shift-in command. 2. after data are completely entered, send command ? capture ? to save data in registers. 3. issue command ? emitting? or ?disable ?. note that: a. DM132 generates its out put in one-shot fashion, i. e. the output after (1024) x t gclk is always zero. b. there are 3 gclk latencies between the latched led emitting/disable command and pwm start/stop. this is shown in figure 2. 4. repeat step 1~4. in the same fram e, the luminance data doesn?t have to be changed, just repeat st ep 3~4. note that the second command ? emitting ? will be omitted if the last (1024) x t gclk pwm has not finished, unless the ? disable ? command is sent in advance. the process discussed above could be summari zed in the following table. at the same time, dclk and gclk remain free running. table 1. example of command sequence frame n-1 frame n frame n+1 cmd ? ? nop 3 capture emitting / disable shift-in shift-in ? shift-in emitting / disable shift-in shift-in ? shift-in emitting / disable nop ? ? nop capture ? ? din ? ? don?t care. don?t care. don?t care. shift-in data. shift-in data ? shift-in data don?t care shift-in data. shift-in data ? shift-in data don?t care. don?t care. ? ? don?t care. don?t care. ? ? 3 we used the nops (no operation) to wait for the next frame data (at 60hz) ready.
c???? silicon touch technology inc. DM132 DM132 version a.014 page 9 2) led emitting time and current DM132 adjusts the led luminance using pwm (pulse width modulation) technique. the luminance data (d v ) has a resolution of 10 bits (1024steps) and can be set independently for each led. the relationshi p between iout, luminance data, and emitting time is shown in figure 2. current iout time d v x t gclk ?led emitting? command issued 1024 x t gclk 3 x gclk figure 2. pwm current output
c???? silicon touch technology inc. DM132 DM132 version a.014 page 1 0 application diagrams
c???? silicon touch technology inc. DM132 DM132 version a.014 page 11 timing diagrams the timing diagram is an example of DM132 control and response. if DM132 has been set to mode-1, users should iss ue the command and data in the sequence: shift-in data ,latch data, and led1 emitting. dck gck din dout cmd[2:0] cmd[2] cmd[1] cmd[0] iout[15:0] 010
c???? silicon touch technology inc. DM132 DM132 version a.014 page 1 2 detailed description 1) time division operation since each DM132 output could drive 1 led or 2 leds, the users can choose either mode1 luminance data or mode2 luminance data. af ter the luminance data is given, a command should be issued so that t he driver can operate in mode1 or in mode2. figure 3 shows the route of data shif t-in in mode2. later we will explain the data structure of mode1 and mode2 in more details. figure 3. block diagram for primary bus. figure 4 shows how to s witch between 2 leds. when ? led1 emitting ? command is sent, led1 pwm output will st art 3 gclk later. at the same time, the switch of led1 should be turned on. on the other hand, led2 switch should be turned on when led2 pwm output starts. again, ? disable ? command must be sent before ? led1/led2 emitting ?. by periodically switching the emitting co mmands and led switches, we could drive 2 leds per channel. turn on one of the switches one of iout st2226a system led1 emitting or led2 emitting figure 4. system configurat ion for mode 2 operation ch0 led1 c h 0 led2 ch1 led1 c h1 led2 din dout c h1 5 led1 ch15 led2
c???? silicon touch technology inc. DM132 DM132 version a.014 page 1 3 2) serial shift-in luminance data in the mode1 operation, the data for sh ift registers and latches is set as {16(channel) x 10 bit (luminance) x 1(led)} whereas in mode 2 operation, the data is set as {16(channel) x 10 bit (luminance) x 2( led)} configuration. the driver ic can remember both 2 sets of luminance data. the serial shift architecture assumes a fi fo (first-in firs-out ) discipline, hence in the mode1 operation, the most significant bit (msb, bit 9, channel 15) luminance data is the first data shifted in , whereas the least significant bit (lsb, bit 0, channel 0) is the last data bit in a data set. the data structure for t he mode1 and mode2 is shown in the figure 5 and figure 6 respectively. d in channe l 0 1 2 ? 15 0 (lsb) 0 0 0 0 1 1 1 1 1 2 2 2 2 2 3 3 3 3 3 4 4 4 4 4 5 5 5 5 5 6 6 6 6 6 7 7 7 7 7 8 8 8 8 8 bit position for lumina -nce data 9 9 9 9 9 (msb ) d out figure 5. luminance data structure in mode 1
c???? silicon touch technology inc. DM132 DM132 version a.014 page 14 d in channe l 0 1 2 ? 15 0 (lsb) 0 0 0 0 1 1 1 1 1 2 2 2 2 2 3 3 3 3 3 4 4 4 4 4 5 5 5 5 5 6 6 6 6 6 7 7 7 7 7 8 8 8 8 8 led1 bit position for lumina -nce data 9 9 9 9 9 channe l 0 1 2 ? 15 0 0 0 0 0 1 1 1 1 1 2 2 2 2 2 3 3 3 3 3 4 4 4 4 4 5 5 5 5 5 6 6 6 6 6 7 7 7 7 7 8 8 8 8 8 led2 bit position for lumina -nce data 9 9 9 9 9 (msb ) d out figure 6. luminance data structure in mode 2
c???? silicon touch technology inc. DM132 DM132 version a.014 page 15 3) driver current output the drive current is set by an external resistor, rext, connected between the rext pin and gnd. varying the resistor val ue could adjust the current scale ranging from 5ma to the maximum 60 ma. note that the rext pin voltage is designed to be independent of supply volt age, temperature, and pr ocess variation, and is approximately 1.228v. the output current could be calculat ed roughly by the following equation: iout = (1.228 / rext) x 48 the full-scale current iout vs. rext is shown in figure 7. rext - iout 0 10 20 30 40 50 60 70 02468101214 rext (kohm) iout (ma) figure 7. driver current as a function of r ext
c???? silicon touch technology inc. DM132 DM132 version a.014 page 1 6 4) output current performance vs. output voltage in order to obtain a good constant current output, a suitable ou tput voltage is necessary. users can get related informa tion about the minimum output voltage from figure 8. 0 10 20 30 40 50 60 70 0123456 vout (v) iout (ma) figure 8. iout vs. vout (v dd =5v)
c???? silicon touch technology inc. DM132 DM132 version a.014 page 1 7 5) power rating for the relationship between power di ssipation and operating temperature, please refer to figure 9. 0 0.5 1 1.5 2 2.5 3 3.5 4 0 50 100 150 200 ta (free-air temperature) - c pd (total power dissipation) - w sdip sop ssop qfn figure 9. power dissipation vs. operating temperature 6) advantages for application to understand what the advantages over on -off type drivers, we assume that in mode 1 operation, the fr ame rate is 60hz, dclk & gclk both run at 10mhz. we can shift in (1/60hz)/(1/10mhz)=167k bits pe r frame. one channel takes 10 bits, thus 167k/10=16.7k channels (single color pixels). for two dimension display, we take the square root of 16.7k pixels, which equals 129. the resolution, in this case is 129*129. we can round the data a little bit, and we can construct a 128*128 image by
c???? silicon touch technology inc. DM132 DM132 version a.014 page 1 8 connecting 1024 driver ics. (1,024 ea drivers*16 channels 16,384 bit). P within a frame, there are 1024*16*10= 163k dclk & gclk cycles, and we know that the pwm takes 1024 gclk cycles and is one-shot. so we can issue up to 163k/1024=160 pwm cycles within a frame. this can be used as an 160-level total brightness control in addition to the 1024-le vel pixel-dependent lu minance control. these 160- ?led1 emitting? shall be issued periodically within a frame. each time when issuing the ?led1 emi tting? command, the shift-in process will be pended for a few cycles; however, we can resume feeding the data right after the ?led1 emitting? command is issued. to make the total brightness at full sca le, all 160 ?led1 emitting? commands should be issued. to make the total bright ness half of the full scale, we can issue 80-?led1 emitting? commands in companion with 80-?led disable? commands, so that all the 128*128 leds are half of their brightness. a comparison table for pwm led driver vs. on-off type is provided for reference. table 2. comparison between pwm and on-off free running pwm on-off frame rate 60 60 no. shift-in pixels 128 x 128 128 x 128 grayscale for each pixel 1024 1024 grayscale for overall panel 160 1 clocks needed per frame 167k 16.8meg clock rate 10 mhz 1.0 ghz 4 4 surely out of spec. can?t realize in this configuration. system designs for on-off type drivers thus need to reduce frame rate or the no. shift-in pixels or grayscale level for each pixel.
c???? silicon touch technology inc. DM132 DM132 version a.014 page 1 9 package outline dimension sdip28 e e b d e1 0.060typ. l 0.100typ. a a1 0.018typ. a2 seating plane e b l e e1 d a2 a1 a symbols min. nom. max. dimension in inch - - 0.210 0.015 - - 0.125 0.130 0.135 1.385 1.390 1.400 0.283 0.288 0.293 0.31 bsc 0.115 0.130 0.150 0.330 0.350 0.370 0 7 15 note: 1. jedec outline : n/a
c???? silicon touch technology inc. DM132 DM132 version a.014 page 2 0 sop28
c???? silicon touch technology inc. DM132 DM132 version a.014 page 21 ssop28 d e1 e detail a c h x 45 2 r r1 gauge plane 0.25 mm detail a l 1 zd b a1 e a 0.1mm c seating plane notes: dimension d does not include mode protrusions or gate burrs. mold protrusions and gate burrs shall not exceed 0.006 inch per side jedec 2 1 r r1 zd h l e1 e d e c b a2 a1 a symbol min. nom. max. min. nom. max. dimension in mm dimension in inch 1.35 1.63 1.75 0.053 0.064 0.069 0.1 0.15 0.25 0.004 0.006 0.01 1.5 0.059 0.2 0.3 0.008 0.012 0.18 0.25 0.007 0.01 0.635 basic 0.025 basic 9.80 9.91 10.01 0.386 0.39 0.394 5.79 5.99 6.20 0.228 0.236 0.244 3.81 3.91 3.99 0.150 0.154 0.157 0.41 0.635 1.27 0.016 0.025 0.05 0.25 0.5 0.01 0.02 0.838 ref 0.033 ref 0.2 0.33 0.008 0.013 0.2 0.008 0 8 0 8 0 0 5 10 15 5 10 15 mo - 137 (af)
c???? silicon touch technology inc. DM132 DM132 version a.014 page 2 2 qfn32 dimension (mm) dimension (mil) symbol min. nom. max. min. nom. max. a 0.70 0.75 0.80 27.6 29.5 31.5 a1 0 0.02 0.05 0 0.79 1.97 a3 0.25 ref 9.84 ref b 0.18 0.23 0.30 7.09 9.06 11.81 d 5.00 bsc 196.85 bsc d2 1.25 2.70 3.25 49.21 106.30 127.95 e 5.00 bsc 196.85 bsc e2 1.25 2.70 3.25 49.21 106.30 127.95 e 0.50 bsc 19.69 bsc l 0.30 0.40 0.50 11.81 15.75 19.69 y 0.10 3.94 note: 1.dimensioning and tolerancing conform to asme y145.5m-1994. 2. refer to jedec std. mo-220 whhd-2 issue a 16 9 17 24 25 32 1 8 bottom view d2 d e b e l e e2 seating plane a3 a1 a y c 0.10 c 0.10 m cab top view 916 817 24 1 32 25 0.25 c 0.25 c
c???? silicon touch technology inc. DM132 DM132 version a.014 page 2 3 the products listed herein are designed for ordinary electronic a pplications, such as electrical appliances, audio-visual equi pment, communications devices and so on. hence, it is advisable that the devices s hould not be used in medical instruments, surgical implants, aerospace machiner y, nuclear power control systems, disaster/crime-prevention equipment an d the like. misusing those products may directly or indirectly en danger human life, or cause injury and property loss. silicon touch technology, inc. will not ta ke any responsibilities regarding the misusage of the products mentioned a bove. anyone who purchases any products described herein with the above-mentioned inte ntion or with such misused applications should accept full responsibility and indemn ify. silicon touch technology, inc. and its distributors and all their of ficers and employees shall de fend jointly and severally against any and all claims and litigation and a ll damages, cost and expenses associated with such intention and manipulation.

▲Up To Search▲

Price & Availability of DM132

	To Download DM132 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .