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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 DM633 version : a.002 issue date : 2008/05/12 file name : sp-DM633-a.002.doc total pages : 26 16-channel constant current led driver with programmable pwm outputs
c???? silicon touch technology inc . ?W@^?I? 9?7?1 9-7f-1, prosperity road , hsin-chu, taiwan, r.o.c. tel 886-3-5645656 fax 886-3-5645626 16-channel 12-bit pwm constant current led driver version : a.002 page 1 ??u}u??_??????P? unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. DM633 DM633 16-channel constant current led driver with programmabl e pwm outputs general description DM633 is a 16-channel constant current sink led driver. each channel ha s adjustable 12-bits (4096 steps) grayscale pwm control current outputs. 7-bit global brightness control is included in supporting user to adjust chip current easily. it incorporates shift re gisters, data latches, constant current circuitry with current value set by an extern al resistor, selectable os cillator source for pwm functioning, and built-in led open/s hort detection circuit to detect error status. it supports thermal alarm and shutdown function, system retrieve the message to indicate when junction temperature over limitation of chip. it is specifically de signed for led display and lighting applications. features z constant-current outputs: 5ma to 90ma z 12-bit pwm control current output per channel z 7-bit high accuracy global brightness control z maximum output voltage: 17v z maximum clock frequency: 25mhz z selectable internal/external pwm reference clock z pwm free-running capability (refresh rate ~ 4.4k hz with internal oscillator ~ 18 mhz) z build-in real-time led open/short detection z thermal alarm and shotdown ? alarm : junction temperature >110 shutdown : junction temperature > 180 z package and pin assignment (except qfn32 ) comp atible to conventional led driver series (st2221c, dm134/5/6, dm13c) z power supply voltage: 3.3v to 5.5 v applications z indoor/outdoor led video display z led variable message signs (vms) system z led decorative lighting package types z sop24, sop24b, ssop24, tssop24e(with expo sed pad), qfn32 (with exposed pad)
c???? silicon touch technology inc . ?W@^?I? 9?7?1 9-7f-1, prosperity road , hsin-chu, taiwan, r.o.c. tel 886-3-5645656 fax 886-3-5645626 16-channel 12-bit pwm constant current led driver version : a.002 page 2 ??u}u??_??????P? unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. DM633 block diagram dai dck lat dao somode/ gck rext out 0 out 15 12-bit counter 12 12 12 12 12 12 7-bit high accuracy global brightness control vcc gnd 12-bit shift register (1) 12-bit shift register (15) 12-bit latch register (0) 12-bit latch register (1) 12-bit latch register (15) 12-bit shift register (0) 12-bit pwm generator (0) 12-bit pwm generator (1) 12-bit pwm generator (15) out 1 led open/short detector (0) led open/short detector (1) led open/short detector (15) constant current driver (0) constant current driver (1) constant current driver (15)
c???? silicon touch technology inc . ?W@^?I? 9?7?1 9-7f-1, prosperity road , hsin-chu, taiwan, r.o.c. tel 886-3-5645656 fax 886-3-5645626 16-channel 12-bit pwm constant current led driver version : a.002 page 3 ??u}u??_??????P? unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. DM633 pin connection 1 2 3 4 5 6 7 8 24 23 22 21 20 19 18 17 out0 out1 out2 out3 vcc rext dao somode/gck gnd dck lat out 15 out 14 out 13 out 12 dai sop24 ssop24 tssop24e ( top view ) 9 10 11 12 16 15 14 13 out4 out5 out6 out7 out 11 out 10 out 9 out 8 sop24b qfn32 ( bottom view ) 1 2 3 32 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 out0 out1 out2 out3 nc dck lat dai gnd out5 out6 out7 vcc r ext d ao /gck ou t15 ou t14 ou t13 ou t12 gnd out10 out9 out8 nc gnd gnd gnd nc ou t11 vcc out4 somode pin description pin no. pin name function sop24/sop24b/ssop24/tssop24e: 1 tssop24e: exposed pad qfn32: 5, 6, 7, 20,21 gnd ground terminal. qfn32: 1,2,8,exposed pad nc no internal connection sop24/sop24b/ssop24/tssop24e: 2 qfn32: 9 dai serial data input terminal. sop24/sop24b/ssop24/tssop24e: 3 qfn32: 10 dck synchronous clock input terminal for serial data transfer. data is sampled at the rising edge of dck. sop24/sop24b/ssop24/tssop24e: 4 qfn32: 11 lat input terminal of data strobe: ? h ? means data on shift register goes throug h latch (level trigger), ? l ? means data is latched. sop24/sop24b/ssop24/tssop24e: 5~20 qfn32: 12~19, 22~29 out0~15 sink constant-current outputs (open-drain). sop24/sop24b/ssop24/tssop24e: 21 qfn32: 30 somode /gck serial out mode selection(somode) : ? h ? : dao is shifted out and synchronized to falling edge of dck, ? l ? : dao is shifted out and synchronized to rising edge of dck. gray scale clock(gck) : input terminal for pwm operation. sop24/sop24b/ssop24/tssop24e: 22 qfn32: 31 dao serial data output terminal. sop24/sop24b/ssop24/tssop24e: 23 qfn32: 32 rext external resistors connected between rext and gnd for output current value setting. sop24/sop24b/ssop24/tssop24e: 24 qfn32: 3, 4 vcc supply voltage terminal.
c???? silicon touch technology inc . ?W@^?I? 9?7?1 9-7f-1, prosperity road , hsin-chu, taiwan, r.o.c. tel 886-3-5645656 fax 886-3-5645626 16-channel 12-bit pwm constant current led driver version : a.002 page 4 ??u}u??_??????P? unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. DM633 equivalent circuit of inputs and outputs 1. dck, dai, lat , somode/gck terminals 2. dao terminals pcb layout consideration to connect an external resistor to rext pin and ground can determine the maximum output current. if there is any disturbance occurred to rext pin, the constant current output may be unstable or noisy. since rext (pin23), dao (pin22) , and somode/gck (pin21) are next to each other, the most possible interfer ence is caused by dao or somode/g ck signal. accordingly, it is recommended that adding some shielding area with in the above pins in pcb layout, or laying the signal line of above pins on different pcb layer w ill prevent the noise problems effectively.
c???? silicon touch technology inc . ?W@^?I? 9?7?1 9-7f-1, prosperity road , hsin-chu, taiwan, r.o.c. tel 886-3-5645656 fax 886-3-5645626 16-channel 12-bit pwm constant current led driver version : a.002 page 5 ??u}u??_??????P? unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. DM633 maximum ratings (ta=25 c, tj(max) = 150 c) characteristic symbol rating unit supply voltage vcc -0.3 ~ 7.0 v input voltage vin -0.3 ~ vcc+0.3 v output current iout 100 ma output voltage vout -0.3 ~ 17 v input clock frequency fdck 25 mhz gnd terminal current ignd 1600 ma 4.63 ( qfn32) 4.31 ( tssop24e exposed pad) 2.5 ( sop24) 2.23 ( sop24b) power dissipation (4 layer pcb, ta=25 ) pd 1.81 ( ssop24) w 27 ( qfn32 ) 29 ( tssop24e exposed pad) 50 (sop24 ) 56(sop24b) thermal resistance (4 layer pcb, ta=25 ) rth(j-a) 69 (ssop24 ) 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 vcc ? 3.3 5.0 5.5 v output voltage vout driver on *1 1.0 ? 0.5vcc output voltage vout driver off *2 ? ? 17 v io outn 5 ? 90 ioh voh = vcc ? 0.4 v -0.8 ? -2 output current iol vol = 0.2 v +0.8 ? +2 ma vih 0.8vcc ? vcc input voltage vil vcc = 3.3 v ~ 5.5v 0.0 ? 0.2vcc v input clock frequency fdck single chip operation ? ? 25 input pwm frequency fgck vcc = 3.3 v ~ 5.5v ? ? 25 mhz 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) 10 ? ? ns internal oscillator frequency fosc vcc = 5.0v 14.4 18 22 mhz *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 . ?W@^?I? 9?7?1 9-7f-1, prosperity road , hsin-chu, taiwan, r.o.c. tel 886-3-5645656 fax 886-3-5645626 16-channel 12-bit pwm constant current led driver version : a.002 page 6 ??u}u??_??????P? unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. DM633 electrical characteristics (vcc = 5.0 v, ta = 25 c, gbc = 95 unless otherwise noted) characteristic symbol condition min. typ. max. unit output leakage current iol voh = 17 v ? ? 1.0 ua vol iol = 1.5 ma ? ? 0.4 output voltage (s-out) voh ioh= -1.3 ma 4.5 ? ? v output current skew (channel-to-channel) *1 iol1 ? ? 3 % output current skew (chip-to-chip) *2 iol2 vout = 1.0 v rrext = 2.2 k 18.274 ? 20.607 ma output voltage regulation % / vout rrext = 2.2 k vout = 1 v ~ 3 v ? 0.1 0.5 supply voltage regulation % / vcc rrext = 2.2 k ? 1 4 % / v i dd(off) power on all pins are open unless vcc and gnd (free-running mode) ? 5.74 6.5 ma i dd(off) power on all pins are open unless vcc and gnd (external gck mode) ? 4.89 ? i dd(off) input signal is static rrext = 12.4 k all outputs turn off ? 6.28 ? i dd(off) input signal is static rrext = 2.2 k all outputs turn off ? 8.62 ? supply current *3 i dd(off) input signal is static rrext = 570 all outputs turn off ? 17.92 ? 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 . ?W@^?I? 9?7?1 9-7f-1, prosperity road , hsin-chu, taiwan, r.o.c. tel 886-3-5645656 fax 886-3-5645626 16-channel 12-bit pwm constant current led driver version : a.002 page 7 ??u}u??_??????P? unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. DM633 electrical characteristics (vcc = 3.3 v, ta = 25 c, gbc = 95 unless otherwise noted) characteristic symbol condition min. typ. max. unit output leakage current iol voh = 17 v ? ? 1.0 ua vol iol = 1.5 ma ? ? 0.4 output voltage (s-out) voh ioh= -1.3 ma 2.8 ? ? v output current skew (channel-to-channel) *1 iol1 ? ? 3 % output current skew (chip-to-chip) *2 iol2 vout = 1.0 v rrext = 2.2 k 18.275 ? 20.607 ma output voltage regulation % / vout rrext = 2.2 k vout = 1 v ~ 3 v ? 0.1 0.5 supply voltage regulation % / vcc rrext = 2.2 k ? 1 4 % / v i dd(off) power on all pins are open unless vcc and gnd (free-running mode) ? 4.45 ? i dd(off) power on all pins are open unless vcc and gnd (external gck mode) ? 4.04 ? i dd(off) input signal is static rrext = 12.4 k all outputs turn off ? 5.06 ? i dd(off) input signal is static rrext = 2.2 k all outputs turn off ? 7.29 ? supply current *3 i dd(off) input signal is static rrext = 570 all outputs turn off ? 16.24 ? 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 . ?W@^?I? 9?7?1 9-7f-1, prosperity road , hsin-chu, taiwan, r.o.c. tel 886-3-5645656 fax 886-3-5645626 16-channel 12-bit pwm constant current led driver version : a.002 page 8 ??u}u??_??????P? unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. DM633 switching characteristics (vcc = 5.0v, ta = 25 c, gbc = 95 unless otherwise noted) characteristic symbol condition min. typ. max. unit gck-to-out ? 47.5 ? dck(rising)-to-dao ? 25 ? propagation delay ( ? l ? to ? h ? ) dck(falling)-to-dao tplh ? 14.4 ? gck-to-out ? 28.5 ? dck(rising)-to-dao ? 24 ? propagation delay ( ? h ? to ? l ? ) dck(falling)-to-dao tphl ? 9.7 ? output current rise time tor ? 15 ? output current fall time tof ? 7.5 ? output to output delay time unit td ? 33 ? ns output current (propagation delay after la t trigger) top *1 vih = vcc vil = gnd rrext = 2.2 k vl = 5.0 v cl = 13 pf ? ? 288 us switching characteristics (vcc = 3.3v, ta = 25 c, gbc = 95 unless otherwise noted) characteristic symbol condition min. typ. max. unit gck-to-out ? 51.5 ? dck(rising)-to-dao ? 30.5 ? propagation delay ( ? l ? to ? h ? ) dck(falling)-to-dao tplh ? 18.3 ? gck-to-out ? 31.5 ? dck(rising)-to-dao ? 29 ? propagation delay ( ? h ? to ? l ? ) dck(falling)-to-dao tphl ? 14.4 ? output current rise time tor ? 20 ? output current fall time tof ? 10 ? output to output delay time unit td ? 34 ? ns output current (propagation delay after la t trigger) top *1 vih = vcc vil = gnd rrext = 2.2 k vl = 3.3 v cl = 13 pf ? ? 288 us outn dao rext vcc cl vl switching characteristics test circuit a rrext dai lat dck somode /gck cl cl cl cl gnd *1 reload the new pwm data at the end of the last pwm frame.
c???? silicon touch technology inc . ?W@^?I? 9?7?1 9-7f-1, prosperity road , hsin-chu, taiwan, r.o.c. tel 886-3-5645656 fax 886-3-5645626 16-channel 12-bit pwm constant current led driver version : a.002 page 9 ??u}u??_??????P? unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. DM633 constant-current output constant-current value (iout *1 ) of each output channel is set by an external resistor connected between the rext pin and gnd. the current scale ra nging can be adjusted from 5ma to 70ma by varying the resistor value. user can input gbc value to increase iout to 90ma. the reference voltage of rext terminal (vrext) is approximate ly 1.23v. the output current value is calculated by the following equation : iout(ma) 5 10 20 30 40 50 60 70 m 41.13 39.35 36.78 35.09 33.75 32.53 31.35 30.09 output current as a functiono rext value 0 10 20 30 40 50 60 70 80 012345678910 rext(k) io u t(m a) output current as a function of output voltage 0 10 20 30 40 50 60 70 80 0 0 .5 1 1 .5 2 2 .5 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. *1 iout is typical current value setting under 100% pwm duty cycle and 75% iout. iout *1 (ma) ~ v rext (v) r rext (k ) m
c???? silicon touch technology inc . ?W@^?I? 9?7?1 9-7f-1, prosperity road , hsin-chu, taiwan, r.o.c. tel 886-3-5645656 fax 886-3-5645626 16-channel 12-bit pwm constant current led driver version : a.002 page 10 ??u}u??_??????P? unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. DM633 serial data interface the serial-in data (dai) will be clocked into 16 12 bit shift registers synchronized on the rising edge of the cloc k (dck). the data will be transferred into the 16 12 bit latch registers when the strobe signal ( lat ) is kept at high level (level trigge r); otherwise, the data will be held. the latch pulse should be sent afte r the falling edge of the last cloc k within a frame data. the trigger timing of the serial-out data (dao) will be shifte d out on synchronization to the rising edge of the clock if serial out selection (somode) is kept at low level. and if serial out selection (somode) is kept at high level, the serial -out data (dao) will be shifted out on synchronization to the falling edge of the clock (dck). the definition of thermal flag (thf) is shown at page 11. input data format serial-out data format d 15 [9] d 15 [8] thf d 15 [7] d 15 [6] d 15 [5] d 15 [2] d 15 [1] e[ 15 ] d 15 [4] d 15 [3] lsb out 15 msb shift out first out 14 out 0 d 14 [10] d 14 [9] d 14 [8] d 14 [11] d 14 [7] d 14 [6] d 14 [5] d 14 [2] d 14 [1] e[ 14 ] d 14 [4] d 14 [3] lsb msb d 0 [10] d 0 [9] d 0 [8] d 0 [11] d 0 [7] d 0 [6] d 0 [5] d 0 [2] d 0 [1] e[ 0 ] d 0 [4] d 0 [3] lsb msb e[ 15 ], e[ 14 ], ..., e[ 0 thf is the error message of chip thermal detection. 1 is normal, and 0 is abnormal. ] d 15 [ 11 ] are error message of led open detection. 1 is normal, and 0 is abnormal.
c???? silicon touch technology inc . ?W@^?I? 9?7?1 9-7f-1, prosperity road , hsin-chu, taiwan, r.o.c. tel 886-3-5645656 fax 886-3-5645626 16-channel 12-bit pwm constant current led driver version : a.002 page 11 ??u}u??_??????P? unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. DM633 led open/short detection DM633 provides a real time monitor of led ope n / short detection function without extra components or circuit design. when o/s flag *1 set ?l?, it will be identified as a led open failure when the output is turned on but the output voltage is below 0.3v. the test result of each channel will write to its correspondent shift register which is in lsb position (d 15 [0], d 14 [0], ?., d 0 [0]) while strobe signal is active. user can refer to timing diagram on page14. detecting report could be retrieved from serial-out (dao) data. if the system reads ? 1 ? back, that indicates led is in normal status. but if ? 0 ? was retrieved, it means led open failure has occurred. in the short detection, o/s flag set ?h?. and system reads result as ?1? mean s normal, ?0? means led short failure occurred. the short detection threshold voltage is 65% of vcc. in order to make sure led open/short detection function is in well operating condition, it is recommended that all the luminance data are wrote to ? 1 ? then almost turning on the out puts during detection process. thermal alarm and shutdown during operation, when the junction temperature of the chip reaches approximately above 180 , driver will shutdown all the outputs. basically , the chip will cool down and return to the safe operating temperature whic h is approximately below 110 . DM633 will restart all the outputs at the same time. operating upon 180 may cause chip to be damaged permanently. shutdown alarm normal t( ) normal shutdown 180 110 DM633 provides a real time monitor of chip thermal alarm and shutdown function. except avoid the damage occurs when local junction temp erature over the limitation, system can recognize which chip is under this situation. when o/s flag set ? 0?, it will be identified as the chip thermal over 110 as the thf flag retrieved ? 0?. the test resu lt of each chip will write to its correspondent shift register which is in msb position (d 191 [0]) while strobe signal is active. user can refer to timing diagram on page14. detecting report could be retrieved from serial-out (dao) data. if the system reads ? 1 ? back, that indicates chip is in normal status. but if ? 0 ? was retrieved, it means the chip juction temperature is over 180 when o/s flag set to ? 1? . *1 ?l? is the default value of o/s flag. user can refer to gl obal brightness control to know how to set o/s flag on page 16.
c???? silicon touch technology inc . ?W@^?I? 9?7?1 9-7f-1, prosperity road , hsin-chu, taiwan, r.o.c. tel 886-3-5645656 fax 886-3-5645626 16-channel 12-bit pwm constant current led driver version : a.002 page 12 ??u}u??_??????P? unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. DM633 selection of internal/external pwm frequency the default operation mode is the free-running pwm signal generated by internal oscillator after power-on. users coul d switch internal to external pwm frequency source by following timing sequence. there are two alternative options could be selected. the option 1 shows three rising edges of latch pulse ( lat ) when the clock (dck) kept at high le vel then two rising edges of clock (dck) pulse when the latch pulse ( lat ) kept at high level. then the somode/gck pin could input external frequency to operate pwm function. the option 2 shows four rising edges of latch pulse( lat ) when clock(dck) kept at high level th en sending three rising edges of clock (dck) signal, while latch( lat ) signal kept high level at the same time. meanwhile the gck external mode can be set back to the free-running mode. notice that when internal reset at low level, all the shift registers in DM633 will be cleared (kept at low leve l) and all output current will be off immediately. dck lat normal operation t dck lat reset (internal) option 2 : timing combination to set up free-running mode t dck lat option 1 : timing combination to set up external gck mode reset (internal) t 123 12 123 123 4
c???? silicon touch technology inc . ?W@^?I? 9?7?1 9-7f-1, prosperity road , hsin-chu, taiwan, r.o.c. tel 886-3-5645656 fax 886-3-5645626 16-channel 12-bit pwm constant current led driver version : a.002 page 13 ??u}u??_??????P? unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. DM633 timing diagram 1. dck(rising edge) - dai, dao (somode = ?l? at free-running mode, or external gck mode) dck dai dao 50% 50% 50% 50% 50% 50% t wdck t w dck t setup(d) t hold(d) t plh t phl 50% 50% 2. dck(falling edge) - dao (somod e = ?h? at free-running mode) dao 50% 50% 50% 50% t w dck t wdck t plh t phl 50% 50% dck 3. dck-lat dck lat 50% 50% 50% t setup(l) t wlat 50% t hold(l) 4. output to output delay time un it (n=2,3,4,5,6,7,10,11,12,13,14,15) out n out n-2 50% 50% t d 5. gck-out 0 gck out 0 50% 50% 50% t plh t phl 50%
c???? silicon touch technology inc . ?W@^?I? 9?7?1 9-7f-1, prosperity road , hsin-chu, taiwan, r.o.c. tel 886-3-5645656 fax 886-3-5645626 16-channel 12-bit pwm constant current led driver version : a.002 page 14 ??u}u??_??????P? unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. DM633 timing diagram (free-running mode switch to external gck mode example) e[ 0 ]* 2 e[ 0 ]* 2 d a [1] 191 192 dai dao * 1 dck lat * 4 12 191 192 12 192 somode * 5 / gck * 6 outn (current ) d a [0] d c [191] d c [190] d c [0] thf a *3 fr ame dat a a fr ame dat a z fr ame dat a c * 8 on of f high low high low 1 0 1 0 d b [191] d b [190] d b [1] d b [0] d a [191] thf c *3 190 d a [2] <1frame * 7 d z [1] d a [1] 190 d b [2] d d [191] d d [190] 12 d c [191] d c [189] 4096 x gck* 8 1 0 191 d b [191] = *1 dao is shifted out on synchronization to rising / falling edge of dck according to somode is l / h. *2 e[0] is the error message of led open/short detection according t o o / s fla g is l/ h. *4 lat is level trigger, not edge trigger. *5 somode function work in free-running mode. somode default valu e islwhen external gck mode selected. *6 when switching to external gck mode, all registers in DM633 wil l be reset simultaneously. *7 starting the new pwm frame after the last pwm period finish co mpetely. *8 when swithcing to gck mode, outputs will be active after 4096 g ck pulses. when using external frequency for pwm operation, the pwm refre sh rate (frame rate) can be calculated by following equation : for example, if the refresh rate in display system is higher th an 60hz, the input gck frequency must be higher than 246k hz. refresh rate (hz) input gck frequency (hz) tota l p wm re s olution (2 12 ) *3 thf is the flag of alarm / shutdown according to o/s flag is l / h .
c???? silicon touch technology inc . ?W@^?I? 9?7?1 9-7f-1, prosperity road , hsin-chu, taiwan, r.o.c. tel 886-3-5645656 fax 886-3-5645626 16-channel 12-bit pwm constant current led driver version : a.002 page 15 ??u}u??_??????P? unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. DM633 timing diagram (external gck mode sw itch to free-running mode example) 192 d d [0] fr ame dat a d on of f high low high low 1 0 1 0 d d [191] d g [191] d g [190] 12 d f [189] dai dao dck lat somode / outn (current ) 192 d e [0] d e [1 ] 12 192 d f [191] d f [190] d[0] f one free-running pwm cycle fr ame data f d e [191] d e [190] 12 thf d d d [189] d f [19 ] 1 91 gck fr ame dat a c d e [1 ] 89 1 0 thf e thf f
c???? silicon touch technology inc . ?W@^?I? 9?7?1 9-7f-1, prosperity road , hsin-chu, taiwan, r.o.c. tel 886-3-5645656 fax 886-3-5645626 16-channel 12-bit pwm constant current led driver version : a.002 page 16 ??u}u??_??????P? unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. DM633 high resolution current outputs DM633 could provide 12-bit pwm c ontrol current outputs for e ach channel. there are two advantages for system design. one is DM633 has sufficient bit resolution (4096 steps), not only led color information but additional data such as global brightness, dot correction, and gamma correction can be represented by the proper algorithm. the other is to reduce a lot of clock and data rate compared to conventiona l on-off type led drivers. high accuracy global brightness correction DM633 has built-in global brightness correction f eature. it can save pcb space and cost of system by eliminating the rrext valu e or voltage drop adjusting circu it across the external resistors. the output current is calc ulating by following equation *1*2*3 : global brightness data and open/short flag format d c [6] d c [5] d c [2] d c [1] d c [0] d c [4] d c [3] lsb msb shift in first o/s the shift in data sequence of g bc data and detection flag as a bove. dc[6], dc[5 ] to dc[0] are 7-bit data of gbc value. the last bit o/s is the fl ag of detection. when o/s flag set ?l?, the led open detection function be selected. otherwise, if the flag set ?h?, the led short failure detection function be selected. . global brightness control the default gbc data (d gbc ) is ?1011111? (iout = 75% imax *4 ) after power-on. users could shift gbc data in by following timing sequence.th e sequence shows four triggering latch pulses ( lat ) with high level clock (dck), circuit switch into gbc input mode at falling edge of the 4 th latch pulse ( lat ) then user can make eight triggering cl ock pulses to set 7-bit gbc data and o/s flag. notice that pwm data won?t be ch anged while gbc data is latched. dck lat timing combination to set gbc data and o/s flag t *1 iout is the current value setting under 100% pwm duty cycle. *2 irext = vrext / rrext *m as the equation in page 9. *3 d gbc is the data of global brightne ss correction. user can refer to timing sequence to know how to set d gbc on page 17. *4 imax means the gbc data is ?1111111?. iout *1 = v rext/rrext * m *2 * ( 1 + d gbc *3 ) / 96
c???? silicon touch technology inc . ?W@^?I? 9?7?1 9-7f-1, prosperity road , hsin-chu, taiwan, r.o.c. tel 886-3-5645656 fax 886-3-5645626 16-channel 12-bit pwm constant current led driver version : a.002 page 17 ??u}u??_??????P? unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. DM633 timing diagram (gbc data input example) e[ 0 ] d g [1] dai dao dck lat 12 8 somode /gck outn (current ) d g [0] gbc a [6] d g [191] fr ame dat a g fr ame dat a f on of f high low high low 1 0 1 0 190 d g [2] <1frame d f [1] d h [191 ] d h [190] 12 d g [182] d g [181] [] 5 7 [] 0 o/s a 191 192 d h [1 ] d h [0] fr ame dat a ga *1 1 0 191 192 d h [191] gbc a gbc a gbc z [5] gbc a [6] d g [183] o/s gbc z [4] o/s z gbc z [6] *1 the difference between frame data g and ga is output max current..
c???? silicon touch technology inc . ?W@^?I? 9?7?1 9-7f-1, prosperity road , hsin-chu, taiwan, r.o.c. tel 886-3-5645656 fax 886-3-5645626 16-channel 12-bit pwm constant current led driver version : a.002 page 18 ??u}u??_??????P? unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. DM633 output to output delay DM633 has build-in output to output delay with a special arrangement. th is arrangement helps chip avoid noise caused by large current during channels switching. the arrangement details are shown as following table. channel 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 delay units 0 4 1 5 2 6 3 7 3 7 2 4 1 5 0 4 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 operating temperat ure can be referred to the figure below: 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 0 20406080100120140160 ambient temperature ta ( ) power dissipation pd(w) the power consumption of ic can be determ ined by the following equation and should be less than the maximum allowable power dissipation: tj(max)=150 c rth (qfn32) =27 c/watt rth (tssop24e) =29 c/watt rth( sop24 )=50 c/watt rth (sop24b) =56 c/watt rth (ssop24) =69 c/watt ssop24 qfn32 sop24 tssop24e sop24b
c???? silicon touch technology inc . ?W@^?I? 9?7?1 9-7f-1, prosperity road , hsin-chu, taiwan, r.o.c. tel 886-3-5645656 fax 886-3-5645626 16-channel 12-bit pwm constant current led driver version : a.002 page 19 ??u}u??_??????P? unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. DM633 typical application DM633 DM633 DM633 DM633 DM633 DM633 DM633
c???? silicon touch technology inc . ?W@^?I? 9?7?1 9-7f-1, prosperity road , hsin-chu, taiwan, r.o.c. tel 886-3-5645656 fax 886-3-5645626 16-channel 12-bit pwm constant current led driver version : a.002 page 20 ??u}u??_??????P? unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. DM633 d 24 13 12 1 e b e 0.004 a e1 c detail a a1 a2 a l l1 seating plane gauge plane package outline dimension DM633-ssop dimensions in inch dimensions in mm symbols min. max. min. max. a 0.053 0.069 1.346 1.753 a1 0.004 0.010 0.102 0.254 a2 - 0.059 - 1.499 b 0.008 0.012 0.203 0.305 c 0.007 0.010 0.178 0.254 d 0.337 0.344 8.560 8.738 e 0.228 0.244 5.791 6.198 e1 0.150 0.157 3.810 3.988 e 0.025 bsc. 0.635 bsc l 0.016 0.050 0.406 1.270 l1 0.041 bsc 1.041 bsc 0 8 0 8
c???? silicon touch technology inc . ?W@^?I? 9?7?1 9-7f-1, prosperity road , hsin-chu, taiwan, r.o.c. tel 886-3-5645656 fax 886-3-5645626 16-channel 12-bit pwm constant current led driver version : a.002 page 21 ??u}u??_??????P? unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. DM633 package outline dimension DM633-sopb dimensions in inch dimensions in mm symbols min. max. min. max. a - 0.075 - 1.900 a1 0.002 0.008 0.050 0.200 a2 0.051 0.067 1.300 1.700 b 0.012 0.020 0.300 0.500 c 0.004 0.010 0.100 0.250 d 0.504 0.520 12.800 13.200 e 0.303 0.327 7.700 8.300 e 0.0394 bsc 1.000 bsc e1 0.228 0.244 5.800 6.200 l 0.010 0.026 0.250 0.650 0 10 0 10
c???? silicon touch technology inc . ?W@^?I? 9?7?1 9-7f-1, prosperity road , hsin-chu, taiwan, r.o.c. tel 886-3-5645656 fax 886-3-5645626 16-channel 12-bit pwm constant current led driver version : a.002 page 22 ??u}u??_??????P? unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. DM633 b e h e d a1 a 0.004max. l 0.01 inch gauge plane seating plane package outline dimension DM633-sop dimensions in inch dimensions in mm symbols min. max. min. max. a - 0.104 - 2.642 a1 0.004 - 0.102 - b 0.016 bsc 0.406 bsc d 0.612 0.624 15.545 15.850 e 0.292 0.299 7.417 7.595 e 0.050 bsc 1.270 bsc h 0.405 0.419 10.287 10.643 l 0.021 0.041 0.533 1.041 0 8 0 8
c???? silicon touch technology inc . ?W@^?I? 9?7?1 9-7f-1, prosperity road , hsin-chu, taiwan, r.o.c. tel 886-3-5645656 fax 886-3-5645626 16-channel 12-bit pwm constant current led driver version : a.002 page 23 ??u}u??_??????P? unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. DM633 s l l1 0.25mm gauge plane seating plane d1 e2 24 13 12 1 b e e e1 d 0.05 a1 a2 a package outline dimension DM633-tssop (exposed pad) dimensions in inch dimensions in mm symbols min. max. min. max. a - 0.047 - 1.20 a1 0.000 0.006 0.00 0.15 a2 0.031 0.041 0.80 1.05 b 0.007 0.012 0.19 0.30 d 0.303 0.311 7.70 7.90 e1 0.169 0.177 4.30 4.50 e 0.252 bsc 6.400 bsc e 0.026 bsc 0.650 bsc l1 0.039 ref 1.000 ref. l 0.018 0.030 0.45 0.75 s 0.008 - 0.20 - 0 8 0 8 e2 0.0898 0.1122 2.280 2.850 d1 0.146 1.819 3.700 4.620
c???? silicon touch technology inc . ?W@^?I? 9?7?1 9-7f-1, prosperity road , hsin-chu, taiwan, r.o.c. tel 886-3-5645656 fax 886-3-5645626 16-channel 12-bit pwm constant current led driver version : a.002 page 24 ??u}u??_??????P? unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. DM633 package outline dimension DM633-qfn (exposed pad) note: 1.dimensioning and tolerancing conform to asme y145.5m-1994. 2. refer to jedec st d. mo-220 whhd-2 issue a dimensions in inch dimensions in mm symbols min. max. min. max. a 0.028 0.031 0.70 0.80 a1 0 0.002 0 0.05 a3 0.008 ref. 0.203 ref. b 0.007 0.012 0.180 0.300 d 0.193 0.201 4.900 5.100 e 0.193 0.201 4.900 5.100 e 0.0197 bsc 0.500 bsc l 0.012 0.020 0.30 0.50 k 0.0079 - 0.2 - d2 0.049 0.128 1.25 3.25 e2 0.049 0.128 1.25 3.25 d e b e a1 a3 a l k 8 9 16 17 24 25 32 d2 1 e2 0.08 co.35x45
c???? silicon touch technology inc . ?W@^?I? 9?7?1 9-7f-1, prosperity road , hsin-chu, taiwan, r.o.c. tel 886-3-5645656 fax 886-3-5645626 16-channel 12-bit pwm constant current led driver version : a.002 page 25 ??u}u??_??????P? unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. DM633 the products listed herein are designed for ordinary electronic a pplications, such as electrical appliances, audio-visual equipmen t, communications 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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