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? macroblock, inc. 2011 6f-4, no.18, pu-ting rd., hsinchu, taiwan 30072, r.o.c. tel: +886-3-579-0068, fax: +886-3-579-7534, e-mail: info@mblock.com.tw - 1 - october 2011, v2.00 macroblock preliminary datasheet MBI6024 pwm-embedded 3x4-channel constant-current sink driver for led strips features z 3x4-channel constant-current sink driver for led strips z constant current range: 3~45ma z 3 groups of output current, each group is set by an external resistor z sustaining voltage at output channels: 17v (max.) z supply voltage 3v~5.5v z embedded 16-bit pwm generator - gray scale clock generated by the embedded oscillator - s-pwm patented technology z two selectable modes to trade off between image quality and transmission bandwidth - 16-bit gray scale mode (with optional 8-bit dot correction) - 10-bit gray scale mode (with optional 6-bit dot correction) z reliable data transmission - daisy-chain topology - two-wire transmission interface - phase-inversed output clock - built-in buffer for long distance transmission z flexible pwm reset modes - auto-synchronization mode - manual-synchronization mode z rohs-compliant packages application z led strips z mesh display z architectural lighting shrink sop gp: ssop24l-150-0.64 quad flat no-lead gfn: qfn24l-4*4-0.5
october 2011, v2.00 - 2 - MBI6024 pwm-embedded 3x4-channel constant-current sink driver for led strips product description MBI6024 is a 3x4-channel, constant-c urrent, pwm-embedded sink driver for led strips. MBI6024 provides constant current ranging from 3ma to 45ma for each out put channel and are adjustable with three corresponding external resistors. besides, MBI6024 can support both 3.3v and 5v power systems and sustain 17v at output channels. with scrambled-pwm (s-pwm) technology, MBI6024 enhan ces pulse width modulation by scrambling the ?on? time into several ?on? periods to increase visual refresh rate at the same gray scale performance. besides, the gray scale clock (gclk) is generated by the embedded osc illator. moreover, MBI6024 provides two selectable gray scale modes to trade off between image quality and trans mission: 16-bit gray scale mode and 10-bit gray scale mode. the 16-bit gray scale mode provides 65,536 gray scales for each led to enrich the color. subject to the 16-bit gray scale mode, the 8-bit dot correction may adj ust each led by 256-step gain to compensate the led brightness. furthermore, the 10-bit gray scale mode provid es 1,024 gray scales. subject to the 10-bit gray scale mode, 6-bit dot correction may adjust each led by 64-step gain. in addition, MBI6024 features a two-wire transmission inte rface to make cluster-to-cluster connection easier. to improve the transmission quality, mbi 6024 provides phase-inversed output clock to eliminate the accumulation of signal pulse width distortion. MBI6024 is also flexible for either manual-synchronizati on or auto-synchronization. the manual-synchronization is to maintain the synchronization of image frames between ics. the auto-synchronization is to achieve accurate gray scal e, especially when using the built-in oscillator.
october 2011, v2.00 - 3 - MBI6024 pwm-embedded 3x4-channel constant-current sink driver for led strips pin configuration terminal description pin name description and function gp gfn 1 10 gnd ground terminal 2 11 cki input terminal for clock input 3 12 sdi input terminal for serial data input 4 13 test1 test pin 1 (default: internal pulled- high) 5 14 test2 test pin 2 (default: internal pulled- low) 6 15 sdo output terminal for serial data output 7 16 cko output terminal for clock output 8 17 gnd ground terminal 9,10,11 18,19,20 r-exta, b, c input terminals for setting output current by connecting to an external resistor 12 21 vdd 3.3v/5v supply voltage terminal 15,14,13 24,23,22 c3 b3, outa3, output terminals for constant-current output 18,17,16 3,2,1 c2 b2, outa2, output terminals for constant-current output 21,20,19 6,5,4 c1 b1, outa1, output terminals for constant-current output 24,23,22 9,8,7 c0 b0, outa0, output terminals for constant-current output - - thermal pad heat dissipation pad* please connect to gnd. *the desired thermal conductivity will be improved on c ondition that a heat-conducting copper foil on pcb is soldered with thermal pad. MBI6024gp top view MBI6024gfn top view 14 13 15 16 17 18 5 6 4 3 2 1 8 7 9101112 23 24 22 21 20 19 outa1 outb1 outc1 outa2 outb2 outc2 sdo test2 gnd cko r-exta test1 outa0 outb0 outc0 gnd cki sdi vdd r-extb r-extc outa3 outb3 outc3 1 2 3 12 11 8 4 5 6 9 7 10 16 13 15 17 19 20 21 18 22 23 14 24 gnd cki sdi test1 outc3 outb2 outa2 outc1 outc2 outa3 outb3 outb1 sdo cko gnd r-exta r-extb r-extc vdd test2 outb0 outc0 outa1 outa0 thermal pad
october 2011, v2.00 - 4 - MBI6024 pwm-embedded 3x4-channel constant-current sink driver for led strips typical application circuit note: 1. tvs 1 ~tvs 4 are transient voltage suppressor (tvs). 2. c 1 ~c 2 are required. the values of the c 1 ~c 2 are reference only. tantalum capacitors and ceramic capacitors are recommended. 3. for hot plug, system grounding, conne ctor design, external esd protection , or detailed circuit information, please refer to the ?MBI6024 application note? for detailed information. dc/dc converter gnd vdd outa0 outc3 cki sdi r-exta r-extb r-extc cko sdo MBI6024gp r 5 r 4 r 3 c 2 0.1uf 1 2 3 91011 12 24 13 7 6 cki sdi c 1 10uf tvs 2 tvs 3 tvs 4 gnd cko sdo gnd gnd gnd r 2 r 1 v ds v led ldo j 1 j 2 nn nn vin vout connetc to vdd connetc to vdd gnd j 3 vin tvs 1 option option gnd 8
october 2011, v2.00 - 5 - MBI6024 pwm-embedded 3x4-channel constant-current sink driver for led strips block diagram outa0 configuration register 16/10 16/10 sdo sdi cki shift re g iste r cko decoder & data dispatche r comparator data register oscillator pwm counter buffers r-exta i o regulator r-extb i o regulator r-extc i o regulator outb0 outc3 outc0 comparator data register frequency divide r comparator data register outa1 dot correction register dot correction register dot correction register 16/10 comparator data register comparator data register 8/6
october 2011, v2.00 - 6 - MBI6024 pwm-embedded 3x4-channel constant-current sink driver for led strips equivalent circuits of inputs and outputs cki, sdi terminal r-exta, b, c terminal outan,bn,cn terminal cko, sdo terminal ? ? cko, sdo vdd r-exta r-extb r-extc outan outbn outcn
october 2011, v2.00 - 7 - MBI6024 pwm-embedded 3x4-channel constant-current sink driver for led strips maximum rating characteristic symbol rating unit supply voltage v dd 0~7 v sustaining voltage at cki, sdi pins v in -0.4~v dd +0.4 v sustaining voltage at cko, sdo pins v out -0.4~v dd +0.4 v sustaining voltage at outn pins v ds -0.5~+17 v output current per output channel i out +45 ma gnd terminal current i gnd 570 ma heat dissipation (on 4-layer pcb, ta=25c)* gp p d 1.82 w gfn p d 2.97 w thermal resistance (by simulation, on 4-layer pcb)* gp r th(j-a) 68.63 c/w gfn r th(j-a) 42.12 c/w junction temperature t j,max 150** c operating ambient temperature t opr -40~+85 c storage temperature t stg -55~+150 c esd rating human body mode (mil-std-883g method 3015.7) hbm class 3a (4000v to 7999v) - machine mode (jedec eia/jesd22-a115,) mm class b (200v to 399v) - *the pcb size is 76.2mm*114.3mm in simulation. please refer to jedec jesd51. ** operation at the maximum rating for extended periods may reduce the device reliability; therefore, the suggested junction temperature of the device is under 125c. note: the performance of thermal dissipation is strongly re lated to the size of thermal pad, thickness and layer numbers of the pcb. the empirical thermal resistance may be different from simulative value. users should plan for expected thermal dissipation performance by selecting pa ckage and arranging layout of the pcb to maximize the capability.
october 2011, v2.00 - 8 - MBI6024 pwm-embedded 3x4-channel constant-current sink driver for led strips electrical characteristics (v dd =5.0v, ta=25c) characteristics symbol condi tion min. typ. max. unit supply voltage v dd - 4.5 5.0 5.5 v sustaining voltage at out ports v ds outan ~ outcn =off - - 17.0 v output current i out refer to ?test circuit for electrical characteristics? 5 - 45 ma driving current i oh cko, sdo at v oh =4.8v 1.8 2.2 2.5 ma i ol cko, sdo at v oh =0.2v 2.0 2.3 2.8 ma output leakage current i out v ds =17.0v, outan ~ outcn =off - - 1.0 a current skew (channel) di out i out =20ma v ds =1.0v r ext =680 ? - 1.5 3.0 % current skew (ic) di out2 i out =20ma v ds =1.0v r ext =680 ? - 3.0 6.0 % output current vs. output voltage regulation* %/dv ds v ds within 1.0v and 3.0v, - 0.1 0.5 %/v output current vs. supply voltage regulation* %/dv dd v dd within 4.5v and 5.5v - 1.0 2.0 %/v input voltage of cki, sdi pins ?h? level v ih - 0.73 x v dd - v dd v ?l? level v il - gnd - 0.28 x v dd v output voltage of cko, sdo pins ?h? level v ol i ol =+3.0ma - - 0.2 v ?l? level v oh i oh =-3.0ma v dd -0.2 - - v voltage at r-exta,b,c pins v rext outan ~ outcn =on 0.55 0.61 0.66 v knee voltage* v knee r ext =311 ? at i out =45ma 0.7 0.75 0.8 v supply current** ?off? i dd (off) r ext =360 ? , cki, sdi=low, cko, sdo=nc, outan ~ outcn =off 13 15.0 17.0 ma ?on? i dd (on) r ext =680 ? , cki, sdi=low, cko, sdo=nc, outan ~ outcn =on 7.5 9.0 11.0 r ext =680 ? , cki=10mhz, cko, sdo=nc, outan ~ outcn =on - 18.0 20.0 *one channel turns on. ** the supply current may vary with the loading conditions.
october 2011, v2.00 - 9 - MBI6024 pwm-embedded 3x4-channel constant-current sink driver for led strips electrical characteristics (v dd =3.3v, ta=25c) characteristics symbol condi tion min. typ. max. unit supply voltage v dd - 3.0 3.3 3.6 v sustaining voltage at out ports v ds outan ~ outcn =off - - 17.0 v output current i out refer to ?test circuit for electrical characteristics? 3 - 30 ma driving current i oh cko, sdo at v oh =3.1v 1.6 1.9 2.4 ma i ol cko, sdo at v oh =0.2v 1.6 2.1 2.5 ma output leakage current i out v ds =17.0v, outan ~ outcn =off - - 1.0 a current skew (channel) di out i out =20ma v ds =1.0v r ext =680 ? - 1.5 3.0 % current skew (ic) di out2 i out =20ma v ds =1.0v r ext =680 ? - 3.0 6.0 % output current vs. output voltage regulation* %/dv ds v ds within 1.0v and 3.0v - 0.1 0.5 %/v output current vs. supply voltage regulation* %/dv dd v dd within 3.0v and 3.6v - 1.0 2.0 %/v input voltage of cki, sdi pins ?h? level v ih - 0.73 x v dd - v dd v ?l? level v il - gnd - 0.28 x v dd v output voltage of cko, sdo pins ?h? level v ol i ol =+2.0ma - - 0.2 v ?l? level v oh i oh =-2.0ma v dd -0.2 - - v voltage at r-exta,b,c pins v rext outan ~ outcn =on 0.60 0.61 0.62 v knee voltage* v knee r ext =467 ? at i out =30ma 0.80 0.82 0.84 v supply current** ?off? i dd (off) r ext =360 ? , cki,sdi=low, cko, sdo= nc, outan ~ outcn =off - 13.0 15.0 ma ?on? i dd (on) r ext =680 ? , cki,sdi=low, cko, sdo=nc, outan ~ outcn =on - 9.0 11.0 r ext =680 ? , cki=10mhz, cko, sdo=nc, outan ~ outcn =on - 13.0 15.0 *one channel turns on. **the supply current may vary with the loading conditions.
october 2011, v2.00 - 10 - MBI6024 pwm-embedded 3x4-channel constant-current sink driver for led strips switching characteristics (v dd =5.0v, ta=25c) characteristics symb ol condition min. typ. max. unit setup time sdi?cki t su v led =4v v ds =1.0v v ih =v dd v il =gnd i out =20m a r l =150 ? c l =10pf c1=4.7uf c2=0.1uf c3=4.7uf c cko =8pf c sdo =8pf 7.5 - - ns hold time cki ?sdi t hd 7.5 - - ns propagation delay time (?h? to ?l?) cki ?cko t phl1 - 40 ns cki ?sdo t phl2 - 30 ns gclk ? outb0 , outa1 , outb2 t phl3 22 30 38 ns gclk ? outc1 , outa3 , outc3 t phl4 27 35 43 ns gclk ? outa0 , outc0 , outa2 t phl5 32 40 48 ns gclk ? outb1 , outc2 , outb3 t phl6 37 45 53 ns propagation delay time (?l? to ?h?) gclk ? outb0 , outa1 , outb2 t plh3 22 30 38 ns gclk ? outc1 , outa3 , outc3 t plh4 27 35 43 ns gclk ? outa0 , outc0 , outa2 t plh5 32 40 48 ns gclk ? outb1 , outc2 , outb3 t plh6 37 45 53 ns pulse width cki* t w(i) 15 - - ns minimum pulse width of pwm outan ~ outcn t wdm 38 - - ns rise time cko/sdo t or 2.0 3.5 5.0 ns outan ~ outcn t or1 8.0 12.0 15.0 ns fall time cko/sdo t of 2.0 3.5 5.0 ns outan ~ outcn t of1 12.0 16.0 20.0 ns frequency cki* f cki 0.2 - 10 mhz internal oscillator f osc - 24.0 - *the maximum frequency may be limited by different applicati on conditions. please refer to the application note for details.
october 2011, v2.00 - 11 - MBI6024 pwm-embedded 3x4-channel constant-current sink driver for led strips switching characteristics (v dd =3.3v, ta=25c) characteristics symbo l condition min. typ. max. unit setup time sdi?cki t su v led =4v v ds =1.0v v ih =v dd v il =gnd i out =20ma r l =150 ? c l =10pf c1=4.7uf c2=0.1uf c3=4.7uf c cko =8pf c sdo =8pf 7.5 - - ns hold time cki ?sdi t hd 7.5 - - ns propagatio n delay time (?h? to ?l?) cki ?cko t phl1 - 50 - ns cki ?sdo t phl2 - 38 - ns gclk ? outb0 , outa1 , outb2 t phl3 32 40 48 ns gclk ? outc1 , outa3 , outc3 t phl4 40 48 56 ns gclk ? outa0 , outc0 , outa2 t phl5 48 56 64 ns gclk ? outb1 , outc2 , outb3 t phl6 56 64 72 ns propagatio n delay time (?l? to ?h?) gclk ? outb0 , outa1 , outb2 t plh3 32 40 48 ns gclk ? outc1 , outa3 , outc3 t plh4 40 48 56 ns gclk ? outa0 , outc0 , outa2 t plh5 48 56 64 ns gclk ? outb1 , outc2 , outb3 t plh6 56 64 72 ns pulse width cki* t w(i) 20 - - ns minimum pulse width of pwm outan ~ outcn t wdm 38 - - ns rise time cko/sdo t or 3.0 6.0 9.0 ns outan ~ outcn t or1 12.0 18.0 24.0 ns fall time cko/sdo t of 3.0 6.0 9.0 ns outan ~ outcn t of1 30.0 35.0 40.0 ns frequency cki* f cki 0.2 - 10 mhz internal oscillator f osc - 24.0 - *the maximum frequency may be limited by different applicati on conditions. please refer to the application note for details.
october 2011, v2.00 - 12 - MBI6024 pwm-embedded 3x4-channel constant-current sink driver for led strips test circuit for electrical / switching characteristics
october 2011, v2.00 - 13 - MBI6024 pwm-embedded 3x4-channel constant-current sink driver for led strips timing waveform signal input and output with phase-inversed output clock output timing
october 2011, v2.00 - 14 - MBI6024 pwm-embedded 3x4-channel constant-current sink driver for led strips principle of operation MBI6024 provides spi-like interface (cki, sdi), a two-wire transmission interf ace, to address the data, so that MBI6024 receives the data directly without a latch comm and. the sequence of operation should follow the steps below: step 1. set the configuration register step 2. send the dot correction data step 3. send the gray scale data MBI6024 receives the data packet contai ning targeted gray scale (gs) data fr om the controller, and turns on the output channels according to the gray scale data. the gr ay scale clock of pwm genera tor, gclk, is generated by the embedded oscillator. control interface: spi-like interface (cki, sdi) MBI6024 adopts the spi-like interface (c ki/sdi). by spi-like interface, mb i6024 samples the data (sdi) at the falling edge of the clock (cki).the following waveform s is the example of the spi-like interface. phase-inversed output clock MBI6024 enhances the capability of cascading mbi 6024 by phase-inversed output clock function. by phase-inversed output clo ck, the clock phase will be inversed from cki to cko to eliminate the accumulation of the pulse width deviation. this improves the signal integrit y of data transmission. the following chart illustrates the phase-inversed output clock results. original: cki 1 original: cko 1 phase-inverse clock i:cko 2 phase-inverse clock ii: cko 3
october 2011, v2.00 - 15 - MBI6024 pwm-embedded 3x4-channel constant-current sink driver for led strips the structure of data packet MBI6024?s data packet contains three parts: 1. prefix: the prefix is a symbol of ?silent-to- reset?, i.e. a time period for MBI6024 to distinguish two data packets. during the prefix, both cki and sdi should be tied-lo w and stop for more than 172 cki cycles. 2. header: the header defines the cascaded ic numbers and al so contains a command to decide the data type. 3. data: this is the data for each ic. it may be gray scale data, dot correction data, or configuration data. structure of a data packet: prefix header data
october 2011, v2.00 - 16 - MBI6024 pwm-embedded 3x4-channel constant-current sink driver for led strips setting the data types by the command MBI6024 provides six kinds of commands and input data types shown as the table below: command h[5:0] data type 6?b11 1111 16-bit gray scale data 6?b10 1011 10-bit gray scale data 6?b11 0011 8-bit dot correction data 6?b10 0111 6-bit dot correction data 6?b10 0011 16-bit configuration data 6?b11 0111 10-bit configuration data once MBI6024 receives the sdi=1 (1?b1), MBI6024 will start to check if the data is a valid command or not. if the 6-bit data is a valid command, the driver will latch the specific data according to the protocol. if the 6-bit data is not a valid command, MBI6024 will wait for another sdi=1 (1?b1) to check the validity of the next command. time-out reset for transmission abort time-out reset is to prevent ics from misreading during the data transmission. if the cki is tied-low for more than 95 cki cycles, MBI6024 may identify the wi res as disconnection. to prevent fr om misreading, MBI6024 will ignore the present input data and continuously show the previous im age data until the next image data is correctly recognized. the prefix in the beginning of a data packet MBI6024 identifies the data as a new data packet after ti me-out, so the prefix in the beginning of a data packet should be more than 172 cki cycles. if both cki and sdi are tied-low and stop for more than the setting of cki time-out period, MBI6024 will start to check the valid command of the next data packet. the pref ix between two data packets helps MBI6024 identify the data packet correctly. the following timing diagram illustr ates the interval between two data packets in 16-bit gray scale mode. the prefix > 172 cki cycles
october 2011, v2.00 - 17 - MBI6024 pwm-embedded 3x4-channel constant-current sink driver for led strips definition of configuration register MBI6024 provides two configuration regi ster sections: configurat ion register 1 (cf1) and c onfiguration register 2 (cf2) as defined in the tables below. configuration register 1 (cf1): msb lsb bit 9 8 7 6 5 4 3 2 1 0 default value 10 0 11 1 1 11 0 note: bit [15:10] should be set as ?0? to avoid signal misjudgment. bit definition value function 9:8 gclk frequency 11 gclk=frequency of internal os cillator, i.e. 24mhz (typical). 10 (default) gclk=oscillator frequency di vided by two, i.e. 12mhz (typical). 01 gclk=oscillator frequency divided by four, i.e. 6mhz (typical). 00 gclk= oscillator frequency divided by eight, i.e. 3mhz (typical). 7 dot correction mode 0 (default) enable dot correction, 1 bypass dot correction 6:5 reserved 11 (default) must fill in ?11? 4 pwm counter reset 1 (default) reset pwm counter after programming configuration register 0 do not reset pwm counter after programming configuration register 3 pwm data synchronization 1 (default) automatic synchronization 0 manual synchronization 2:1 phase-inversed output clock 11 (default) the waveform is inversed from cki to cko; please set the two bits as 2b?11. other combinations are reserved for internal tests. 0 parity check 1 enable 0 (default) disable
october 2011, v2.00 - 18 - MBI6024 pwm-embedded 3x4-channel constant-current sink driver for led strips gclk frequency MBI6024 provides four kinds of internal gclk frequency, which is the internal oscillator frequency divided by 1, 2, 4, and 8, for different applications according to the bits of cf1[9:8]. the internal oscillato r frequency is 24mhz (typ.); e.g. if the internal oscillator frequency is divided by 8, the gclk frequency is 3mhz. higher gclk frequency provides higher visual refresh rate , but also higher emi. if the output current is larger than 40ma, the gclk frequency is suggested to be lower than 8mhz to keep good linearity at low gray scale level. dot correction mode MBI6024 also provides 8-bit or 6-bit dot correction in 16-bi t or 10-bit gray scale mode respectively. dot correction control helps compensate led brightness and reduces the loadi ng of calculation in controllers. in addition, with the built-in multiplier, MBI6024 operates dot correction without sacrificing the visual refresh rate. pwm counter reset MBI6024 can optionally reset the pwm counter by setting the bi t of cf1[4] after programming configuration register. the default setting is to reset the pwm counter to star t a new pwm cycle to align the pwm output data for new setting. pwm data synchronization MBI6024 is also flexible for either manual-synchronization or auto-synchronization by se tting the bit of cf1[3]. for auto-synchronization, the bit of cf1[3] is set to ?1? (default). MBI6024 will automatically process the synchronization of previous data and next data for pwm counting. the nex t image data will be updated to output buffers and start pwm counting when the previous data finishes one internal pwm cycle. for manual-synchronization, the bit of cf1[3] is set to ?0?. once the next input data is correctly recognized, MBI6024 will stop the present pwm cycle a nd restart a new pwm cycle to sh ow the new data immediately. the advantage of manual-synchronization is to maintain the synchronization of image frames between ics, but the pwm cycle may not be finished, so the gray scale accuracy is slightly affected. since s-pwm scrambles the 16-bit pwm cycle into 64 small periods, the gray scale accura cy remains good. for better gray scale performance, auto-synchronization keeps accurate gray scale especially when using t he built-in oscillator, but the drawback is the synchronization of image frames between ics. parity check parity check is to check the data in the header for any erro r, especially to prevent the configuration register and dot correction register from miswriting.
october 2011, v2.00 - 19 - MBI6024 pwm-embedded 3x4-channel constant-current sink driver for led strips configuration register 2 (cf2): default value msb lsb bit 2 1 0 value 111 note: bit [15:3] should be set as ?0? to avoid signal misjudgment. bit definition value function 2 reserved 1 (default) must fill in ?1? 1:0 reserved 11 (default) must fill in ?11? 16-bit configuration data for 16-bit configuration dat a, each word is 16 bits. each MBI6024 needs 3 words (3x16=48 bits) for the configuration data. however, each conf iguration data has only 10 bits, and the msb 6 bits of each word are invalid. prior to the configuration data, there is a 48-bit header. mb i6024 provides parity check function to check the count of bit to prevent the data transmission error. the data format is shown below: prefix both cki and sdi should be tied-low and stop for more than 172 cki cycles. 48-bits header bit definition value function 47:42 h[5:0] 100011 the command of 16-bit configuration data 41:32 a[9:0] 0000000000 address data. always send 10?b 0000000000 31:26 h[5:0] 100011 double check the command. it should be the same as the prior h[5:0], otherwise the data packet will be ignored. 25:16 l[9:0] n-1 n=number of ic in series set the number of ic in series 15:12 p[3:0] 0000~1111 p[3:0] are parity check bits, if it is incorrect, the data packet will be ignored. p[0] is the parity check bit of l[9:0] p[0]=1 if the count of ?1? within l[9:0] is odd; p[0]=0 if the count of ?1? within l[9:0] is even. p[1] is the parity check bit of a[9:0] p[1]=1 if the count of ?1? within a[9:0] is odd; p[1]=0 if the count of ?1? within a[9:0] is even. p[2] is the parity check bit of h[5:0] p[2]=1 if the count of ?1? within h[5:0] is odd; p[2]=0 if the count of ?1? within h[5:0] is even.
october 2011, v2.00 - 20 - MBI6024 pwm-embedded 3x4-channel constant-current sink driver for led strips p[3] is the parity check bit of p[2:0] p[3]=1 if the count of ?1? within p[2:0] is odd; p[3]=0 if the count of ?1? within p[2:0] is even. 11:10 x1[1:0] xx don?t care. the value is suggested to be ?0?. 9:0 l[9:0] n-1 n=number of ic in series double check the number of ic in series 48-bit configuration data bit definition value function 47:0 x2[5:0]~cf1 n [9:0]~ x2[5:0]~cf1 n [9:0]~ x3[12:0]~cf2 n [2:0] 48b?0~48b?1 x2[5:0] are ?don?t care? bits. the value is suggested to be ?0?. cf1 n [9:0] are 10 bits data of configur ation register 1 (cf1). the 2 nd cf1[9:0] double checks the data of configuration register bank 1 (cf1). it should be the same as the 1 st cf1 n [9:0]; otherwise the data will not be written into register. x3[12:0] are ?don?t care? bits. the value is suggested to be ?0?. cf2 n [2:0] are 3 bits data of configuration register 2 (cf2) the configuration data of the last ic is sent first, followed by the previous ics, and the fi rst ic?s configuration data is sent in the end of the packet.
october 2011, v2.00 - 21 - MBI6024 pwm-embedded 3x4-channel constant-current sink driver for led strips 10-bit configuration data for 10-bit configuration dat a, each word is 10 bits. each MBI6024 needs 3 words (3x10=30 bits) for the configuration data. prior to the config uration data, there is a 30-bit header. MBI6024 provides parity check function to check the count of bit to prevent the data tr ansmission error. the data format is shown below: prefix both cki and sdi should be tied-low and stop for more than 172 cki cycles. 30-bit header bit definition value function 29:24 h[5:0] 110111 the command of 10-bit configuration data 23:20 p[3:0] 0000~1111 p[3:0] are parity check bits, if it is incorrect, the data packet will be ignored. p[0] is the parity check bit of l[9:0]. p[0]=1 if the count of ?1? within l[9:0] is odd; p[0]=0 if the count of ?1? within l[9:0] is even. p[1] is the parity check bit of a[9:0] p[1]=1 if the count of ?1? within a[9:0] is odd; p[1]=0 if the count of ?1? within a[9:0] is even. p[2] is the parity check bit of h[5:0] p[2]=1 if the count of ?1? within h[5:0] is odd; p[2]=0 if the count of ?1? within h[5:0] is even. p[3] is the parity check bit of p[2:0] p[3]=1 if the count of ?1? within p[2:0] is odd; p[3]=0 if the count of ?1? within p[2:0] is even. 19:10 a[9:0] 0000000000 address data. always send 10?b 0000000000 9:0 l[9:0] n-1 n=number of ic in series set the number of ic in series 30-bit configuration data bit definition value function 29:0 cf1 n [9:0]~cf1 n [9: 0]~x4[6:0]~cf2 n [2 :0] 30b?0~30b?1 cf1[9:0] are 10 bits data of c onfiguration register 1 (cf1). the 2 nd cf1[9:0] double checks the data of configuration register 1 (cf1). it should be the same as the 1 st cf1[9:0]; otherwise the data will not be written into register. x4[6:0] are ?don?t care? bits. the value is suggested to be ?0?. cf2[2:0] are 3 bits data of c onfiguration register 2 (cf2) the configuration data of the last ic is sent first, followed by the previous ics, and the fi rst ic?s configuration data is sent in the end of the packet.
october 2011, v2.00 - 22 - MBI6024 pwm-embedded 3x4-channel constant-current sink driver for led strips gray scale MBI6024 provides two gray scale modes: 16-bit gray scal e mode and 10-bit gray scale mode by adopting s-pwm or conventional pwm algorithm respectively. MBI6024 adopts s-pwm technology in 16-bit gray scale mode to scramble the 16-bit pwm to 64 segments, so that the vis ual refresh rate can be increased. for example, with s-pwm, the default pwm clock (gclk) frequency is around 12 mhz (the frequency of internal oscillator divided by two), and therefore, the visual refresh rate of 16-bit gray scale mode will be increased to: 12mhz/65536x64=11,718hz on the other hand, MBI6024 prov ides 10-bit gray scale mode by conventio nal pwm. in 16-bit gray scale mode, MBI6024 achieves 65,536 gray scales fo r each led, and in 10-bit gray scale mode, MBI6024 achieves 1,024 gray scales. the following illustrations explain the pwm counting by s-pwm and conventional pwm algorithms. pwm counting by s-pwm or conventional pwm algorithm with s-pwm technology, the total pwm cycles can be broken down into 64 segments. example of 16-bit gray scale data: gray scale data the ratio of output turn-on time in a pwm cycle 0 0/2 16 1 1/2 16 2 2/2 16 . . . . . . 65535 65535/2 16 example of 10-bit gray scale data: gray scale data the ratio of output turn-on time in a pwm cycle 0 0/2 10 1 1/2 10 2 2/2 10 . . . . . . 1023 1023/2 10 16-bit gray scale mode with s-pwm 16-bit gray scale mode: 65,536 gray scales 2 3 4 5 10-bit gray scale mode with conventional pwm 10-bit gray scale mode: 1,024 gray scales once of 10-bit pwm counting once of 16-bit pwm counting 1 62 63 64 1024 gclks
october 2011, v2.00 - 23 - MBI6024 pwm-embedded 3x4-channel constant-current sink driver for led strips 16-bit gray scale data for 16-bit gray scale data, each word is 16 bits. each MBI6024 needs 12 words (12x16=192 bits) for the gray scale data of each output channel of one MBI6024. prior to t he gray scale data, there is a 48-bit header. MBI6024 provides parity check function to check the count of bit to prevent the data transmission error. the data format is shown below: prefix both cki and sdi should be tied-low and stop for more than 172 cki cycles. 48-bit header bit definition value function 47:42 h[5:0] 111111 the command of 16-bit gray scale data 41:32 a[9:0] 0000000000 address data. always send 10?b 0000000000 31:26 h[5:0] 111111 double check the command. it should be the same as the prior h[5:0], otherwise the data packet will be ignored. 25:16 l[9:0] n -1 n=number of ic in series set the number of ic in series 15:12 p[3:0] 0000~1111 p[3:0] are parity check bits, if it is incorrect, the data packet will be ignored. p[0] is the parity check bit of l[9:0] p[0]=1 if the count of ?1? within l[9:0] is odd; p[0]=0 if the count of ?1? within l[9:0] is even. p[1] is the parity check bit of a[9:0] p[1]=1 if the count of ?1? within a[9:0] is odd; p[1]=0 if the count of ?1? within a[9:0] is even. p[2] is the parity check bit of h[5:0] p[2]=1 if the count of ?1? within h[5:0] is odd; p[2]=0 if the count of ?1? within h[5:0] is even. p[3] is the parity check bit of p[2:0] p[3]=1 if the count of ?1? within p[2:0] is odd; p[3]=0 if the count of ?1? within p[2:0] is even. 11:10 x1[1:0] xx don?t care. the value is suggested to be ?0?. 9:0 l[9:0] n-1 n=number of ic in series double check the number of ic in series 192-bit gray scale data bit definition value function 191:0 c 3n [15:0]~a 0n [15:0] 192b?0~192b?1 16-bit x 12 channels gray scale data of the nth MBI6024. the data of 3n outc is sent first. the gray scale data of the last ic is s ent first, followed by the previous ics, and the first ic?s gray scale data is sent in the end of the packet.
october 2011, v2.00 - 24 - MBI6024 pwm-embedded 3x4-channel constant-current sink driver for led strips 10-bit gray scale data for 10-bit gray scale data, each word is 10 bits. each MBI6024 needs 12 words (12x10=120 bits) for the gray scale data of each output channel of one MBI6024. prior to t he gray scale data, there is a 30-bit header. MBI6024 provides parity check function to check the count of bit to prevent the data transmission error. the data format is shown below: prefix both cki and sdi should be tied-low and stop for more than 172 cki cycles. 30-bit header bit definition value function 29:24 h[5:0] 101011 the command of 10-bit gray scale data 23:20 p[3:0] 0000~1111 p[3:0] are parity check bits, if it is incorrect, the data packet will be ignored. p[0] is the parity check bit of l[9:0]. p[0]=1 if the count of ?1? within l[9:0] is odd; p[0]=0 if the count of ?1? within l[9:0] is even. p[1] is the parity check bit of a[9:0] p[1]=1 if the count of ?1? within a[9:0] is odd; p[1]=0 if the count of ?1? within a[9:0] is even. p[2] is the parity check bit of h[5:0] p[2]=1 if the count of ?1? within h[5:0] is odd; p[2]=0 if the count of ?1? within h[5:0] is even. p[3] is the parity check bit of p[2:0] p[3]=1 if the count of ?1? within p[2:0] is odd; p[3]=0 if the count of ?1? within p[2:0] is even. 19:10 a[9:0] 0000000000 address data. always send 10?b 0000000000 9:0 l[9:0] n-1 n=number of ic in series set the number of ic in series 120-bit gray scale data bit definition value function 119:0 c 3n [9:0]~a 0n [9:0] 120b?0~120b?1 10-bit x 12 channels gray scale data of the nth MBI6024. the data of 3n outc is sent first. the gray scale data of the last ic is s ent first, followed by the prev ious ics, and the first ic?s gray scale data is sent in the end of the packet.
october 2011, v2.00 - 25 - MBI6024 pwm-embedded 3x4-channel constant-current sink driver for led strips dot correction for valid dot correction control, users have to program dot correction data before sending gray scale data. 16-bit gray scale data with 8-bit dot correction MBI6024 multiplies the 16-bit gray scale data and 8-bit dot correction data intern ally and truncates the product to 16 bits, so the pwm cycle time remains 65,536 gclks. the following is the equation for the duty cycle of output in 16-bit gray scale mode. for 8-bit dot correction, the default value of dot correction data is 255. according to the above equation, the following table shows the examples: example: dot correction data the ratio of output turn-on time 0 1/256 x gray scale data 1 2/256 x gray scale data 2 3/256 x gray scale data . . . . . . 255 256/256 x gray scale data 10-bit gray scale with 6-bit dot correction: the following is the equation for the duty cycle of output in 10-bit gray scale mode. for 6-bit dot correction, the default value of dot correction data is 63. according to the above equation, the following table shows the examples: example: dot correction data the ratio of output turn-on time 0 1/64 x gray scale data 1 2/64 x gray scale data 2 3/64 x gray scale data . . . . . . 63 64/64 x gray scale data
october 2011, v2.00 - 26 - MBI6024 pwm-embedded 3x4-channel constant-current sink driver for led strips the algorithm of pwm counting with dot correction data when adopting 8-bit dot correction in 16-bit gray scale mode, MBI6024 multiplies the 16-bit gray scale data and the 10-bit dot correction data and truncates the product to 16 bits, then uses the corrected 16-bit data to generate pwm output by s-pwm technology. the built-in multiplie r facilitates to keep high visual refresh rate. the chart below illustrates the effect of the built-in multiplier and s-pwm. assume: the 16-bit gray scale data=65,535, 8-bit dot correction data=127 (50%), then the 16-bit pwm output period is scrambled into 64 segments, each segment has ~50% duty ratio. when adopting 6-bit dot correction in 10-bit gray scale mode, MBI6024 multiplies the 10-bit gray scale data and the 6-bit dot correction data and truncates the product to 10 bits, then uses the corrected 10-bit data to generate pwm output by s-pwm technology. the built-in multiplie r facilitates to keep high visual refresh rate. the chart below shows the pwm output. assume: the 10-bit grayscale data=1023, 6-bit dot correction data=31 (50%). the output duty ratio=511/1024(~50%) f the output duty cycle=1024 gclks f 16-bit gray scale data with 8-bit dot correction data 16-bit gray scale=65,535, 8-bit dot correction data=127 2 3 4 5 once of 16-bit pwm counting 1 62 63 64 1024 gclks 10-bit gray scale data = 1,023, 6-bit dot correction data = 31 once of 10-bit pwm counting (1,024 gclks) 511 gclks 10 gray scale data with 6-bit dot correction data
october 2011, v2.00 - 27 - MBI6024 pwm-embedded 3x4-channel constant-current sink driver for led strips 8-bit dot correction data for 8-bit dot correction data, each word is 16 bits. ea ch MBI6024 needs 12 words (12x16=192 bits) for the dot correction data of each output channel of one MBI6024. ho wever, each dot correction data has only 8 bits, and the first 8 bits of each word are checking bi ts of dot correction. prior to the dot correction data, there is a 48-bit header. MBI6024 provides parity check function to check the count of bit to preven t the data transmission error. the data format is shown below: prefix both cki and sdi should be tied-low and stop for more than 172 cki cycles. 48-bit header bit definition value function 47:42 h[5:0] 110011 the command of 8-bit dot correction data 41:32 a[9:0] 0000000000 address data. always send 10?b 0000000000 31:26 h[5:0] 110011 double check the command. it should be the same as the prior h[5:0], otherwise the data packet will be ignored. 25:16 l[9:0] n-1 n=number of ic in series set the number of ic in series 15:12 p[3:0] 0000~1111 p[3:0] are parity check bits, if it is incorrect, the data packet will be ignored. p[0] is the parity check bit of l[9:0]. p[0]=1 if the count of ?1? within l[9:0] is odd; p[0]=0 if the count of ?1? within l[9:0] is even. p[1] is the parity check bit of a[9:0] p[1]=1 if the count of ?1? within a[9:0] is odd; p[1]=0 if the count of ?1? within a[9:0] is even. p[2] is the parity check bit of h[5:0] p[2]=1 if the count of ?1? within h[5:0] is odd; p[2]=0 if the count of ?1? within h[5:0] is even. p[3] is the parity check bit of p[2:0] p[3]=1 if the count of ?1? within p[2:0] is odd; p[3]=0 if the count of ?1? within p[2:0] is even. 11:10 x1[1:0] xx don?t care. the value is suggested to be ?0?. 9:0 l[9:0] n-1 n=number of ic in series double check the number of ic in series
october 2011, v2.00 - 28 - MBI6024 pwm-embedded 3x4-channel constant-current sink driver for led strips 192-bit dot correction data bit definition value function 191:0 c 3n [7:0]~a 0n [7:0] 192b?0~192b?1 8-bit x 2 x 12 channels dot correction data of the nth MBI6024. the data of 3n outc is sent first. sending dot correction data twice is to double check the dot correction data. the two data should be the same; otherwise, the dot co rrection data of the ic will not be latched. the dot correction data of the last ic is sent first, followed by the previous ics, and the fi rst ic?s dot correction data is sent in the end of the packet.
october 2011, v2.00 - 29 - MBI6024 pwm-embedded 3x4-channel constant-current sink driver for led strips 6-bit dot correction data for 6-bit dot correction data, each word is 10 bits. ea ch MBI6024 needs 12 words (12x10=120 bits) for the dot correction data of each output channel of one MBI6024. ho wever, each dot correction data has only 6 bits, and the first 4 bits of each word should be set as ?0?. prior to the dot correction data, there is a 30-bit header. MBI6024 provides parity check function to check the count of bit to prevent the data transmission error. the data format is shown below: prefix both cki and sdi should be tied-low and stop for more than 172 cki cycles. 30-bits header bit definition value function 29:24 h[5:0] 100111 the command of 6-bit dot correction data 23:20 p[3:0] 0000~1111 p[3:0] are parity check bits, if it is incorrect, the data packet w ill be ignored. p[0] is the parity check bit of l[9:0]. p[0]=1 if the count of ?1? within l[9:0] is odd; p[0]=0 if the count of ?1? within l[9:0] is even. p[1] is the parity check bit of a[9:0] p[1]=1 if the count of ?1? within a[9:0] is odd; p[1]=0 if the count of ?1? within a[9:0] is even. p[2] is the parity check bit of h[5:0] p[2]=1 if the count of ?1? within h[5:0] is odd; p[2]=0 if the count of ?1? within h[5:0] is even. p[3] is the parity check bit of p[2:0] p[3]=1 if the count of ?1? within p[2:0] is odd; p[3]=0 if the count of ?1? within p[2:0] is even. 19:10 a[9:0] 0000000000 address data. always send 10?b 0000000000 9:0 l[9:0] n-1 n=number of ic in series set the number of ic in series
october 2011, v2.00 - 30 - MBI6024 pwm-embedded 3x4-channel constant-current sink driver for led strips 120-bit dot correction data bit definition value function 119: 110 z[3:0]~c 3n [5:0] 10b?0000000000~ 10b?0000111111 (6-bit + 4-bit) x 1 channel dot correction data of the nth MBI6024. the data of outc3 is sent first. z[3:0] are check bits. please send 4b?0000; otherwise, the dot correct ion data the the ic will not be latched. 109:0 z[3:0]~b 3n [5:0]...a 0n [5:0] the range of the data value is the same as the previous 10 bits. (6-bit + 4-bit) x 11 channels dot correction data of the nth MBI6024. the data format is the same as the prior 10 bits. the dot correction data of the last ic is sent first, followed by the previous ics, and the fi rst ic?s dot correction data is sent in the end of the packet. the rati o of output turn-on time will be (dot correction data+1)/256 x gray scale data.
october 2011, v2.00 - 31 - MBI6024 pwm-embedded 3x4-channel constant-current sink driver for led strips mbi5042 i out vs. v ds @ v dd =5.0v 0 5 10 15 20 25 30 35 40 45 50 0.0 0.5 1.0 1.5 2.0 2.5 3.0 v ds (v) i out (ma) constant current 1) MBI6024 performs excellent current skew: the maximum current variation between channels is less than 3%, and that between ics is less than 6%. 2) in addition, in the saturation region, the output current keeps constant when the output voltage (v ds ) is changed. this characteristic guarantees the led show the same brightness regardless of the variations of led forward voltages (v f ). MBI6024 i out vs. v ds at v dd =5.0v mbi5042 i out vs. v ds @ v dd =3.3v 0 5 10 15 20 25 30 35 0.0 0.5 1.0 1.5 2.0 2.5 3.0 v ds (v) i out (ma) MBI6024 i out vs. v ds at v dd =3.3v
october 2011, v2.00 - 32 - MBI6024 pwm-embedded 3x4-channel constant-current sink driver for led strips setting the output current the output current of each channel (i out ) is set by an external resistor, r ext . the relationship between i out and r ext is shown in the following figure. the output current of each channel (i out ) is set by an external resistor, r ext . when output channels are turned on, v rext is around 0.61v. the relationship between i out and r ext is shown in the following figure. also, the output current can be calculated from the equation: i outa =(v rext /r exta )x23 i outb =(v rext /r extb )x23 i outc =(v rext /r extc )x23 where r exta , r extb , and r extc are the resistances of the external re sistors connected to r-exta, r-extb, r-extc terminals. MBI6024 r ext vs . i out 0 5 10 15 20 25 30 35 40 45 50 0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 r ext ( ? ) i out (ma)
october 2011, v2.00 - 33 - MBI6024 pwm-embedded 3x4-channel constant-current sink driver for led strips package heat dissipation (p d ) the maximum heat dissipation, p d(max) =(t j,max ?t a )/r th(j-a) , decreases as the ambient temperature increases. the heat dissipation (p d ) of MBI6024 is calculated by the equation: p d =(v dd x i dd ) + = = 3 0 i i (i outai x v dsai x duty ai + i outbi x v dsbi x duty bi + i outci x v dsci x duty ci ) for the calculation of duty cycles, please refer to the ?gray scale? section. please refer to the following figure to design within the safe operation area. MBI6024 maximum power dissipation at various ambient temperature 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 010 20 30 40 50 60 70 80 90 100 power dissipation (w) gp type: rth=68.63c/w gfn type: rth=42.12c/w a mbient temperature (c) safe operation area
october 2011, v2.00 - 34 - MBI6024 pwm-embedded 3x4-channel constant-current sink driver for led strips load supply voltage (v led ) the design of v led should fulfill two targets: 1. less power consumption and heat 2. sufficiently headroom for the led and driver ic to operate in the constant-current region. from the figure below, v ds =v led ?v f , which v led is the supply voltage of led. p d (act) will be greater than p d (max) , if v ds drops too much voltage on the driver. in this case, it is recommended to use the lowest possible supply voltage or to set an external resistor to reduce the by v drop . v ds =(v led ?v f )?v drop please refer to the following figure for the application of the resister. switching noise reduction the output ports of led drivers are fr equently switching in typical applications. this behavior usually causes switching noise due to the parasitic inductance on pcb. to eliminate switching noise, please refer to ?application note for 8-bit and 16-bit led drivers-overshoot?. MBI6024 v f v ds v drop supply voltage v led
october 2011, v2.00 - 35 - MBI6024 pwm-embedded 3x4-channel constant-current sink driver for led strips soldering process of ?pb-free & green? package plating* macroblock has defined "pb-free & green" to mean semicond uctor products that are compatible with the current rohs requirements and selected 100% pure tin (sn) to pr ovide forward and backward compatibility with both the current industry-standard snpb-based soldering processes and higher-temperature pb-free processes. pure tin is widely accepted by customers and suppliers of electronic devices in europe, asia and the us as the lead-free surface finish of choice to replace tin-lead. also, it is ba ckward compatible to reflow processes which adopt tin/lead (snpb) solder paste. please refer to jedec j-std-020c for temperature setting. however, in the whole pb-free soldering processes and materials, 100% pure tin (sn) will all require from 245 o c to 260 o c for proper soldering on boards, referring to jedec j-std-020c as shown below. package thickness volume mm 3 <350 volume mm 3 350-2000 volume mm 3 2000 <1.6mm 260 +0 o c 260 +0 o c 260 +0 o c 1.6mm ? 2.5mm 260 +0 o c 250 +0 o c 245 +0 o c 2.5mm 250 +0 o c 245 +0 o c 245 +0 o c *for details, please refer to macroblock?s ?policy on pb-free & green package?. 0 50 100 150 200 250 300 0 50 100 150 200 250 300 temperature (
) time (sec) 25 217
240
255
average ramp-up rate= 3.3
/s average ramp-up rate= 0.7
/s 100s max 30s max ramp-down 6
/s (max) peak temperature 245
~260
< 10s ----maximum peak temperature recommended reflow profile 260
+0
-5
245
? 5
acc.j-std-020c average ramp-up rate = 0.4
/s jedec j-std-020c
october 2011, v2.00 - 36 - MBI6024 pwm-embedded 3x4-channel constant-current sink driver for led strips package outline MBI6024gp outline drawing
october 2011, v2.00 - 37 - MBI6024 pwm-embedded 3x4-channel constant-current sink driver for led strips note 1: the unit for the outline drawing is mm. note 2: please use the maximum dimensions for the thermal pad layout. to avoid the short circuit risk, the vias or circuit traces shall not pass through t he maximum area of thermal pad. MBI6024gfn outline drawing ( ma x) ( ma x)
october 2011, v2.00 - 38 - MBI6024 pwm-embedded 3x4-channel constant-current sink driver for led strips product top mark information product revision history datasheet version device version code v1.00 a v1.01 a v1.02 a v2.00 b product ordering information part number rohs-compliant package type weight (g) MBI6024gp ssop24l-150-0.64 0.11 MBI6024gfn qfn24l-4*4-0.5 0.0379 part number z id number manufacture code device version code the second row of printing mbixxxx product no. package code process code the first row of printing mbixxxx or %jhjut
october 2011, v2.00 - 39 - MBI6024 pwm-embedded 3x4-channel constant-current sink driver for led strips disclaimer macroblock reserves the right to make changes, correction s, modifications, and improvements to their products and documents or discontinue any product or se rvice. customers are advised to cons ult their sales representative for the latest product information before orderi ng. all products are sold subject to t he terms and conditions supplied at the time of order acknowledgement, including those pertaining to warranty, patent infringement, and limitation of liability. macroblock?s products are not designed to be used as compo nents in device intended to support or sustain life or in military applications. use of macroblock?s products in co mponents intended for surgical implant into the body, or other applications in which failure of macroblock?s produc ts could create a situation where personal death or injury may occur, is not authorized withou t the express written approval of t he managing director of macroblock. macroblock will not be held liable for an y damages or claims resulting from the use of its products in medical and military applications. related technologies applied to the product are protec ted by patents. all text, images, logos and information contained on this document is the intellectual property of macroblock. unauthorized re production, duplication, extraction, use or disclosure of the above mentione d intellectual property will be deemed as infringement.

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