View BU95408_2152481.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

1/14 www.rohm.com 2010.10 - rev. a ? 2010 rohm co., ltd. all rights reserved. drivers for large lcd panels 6bit rsds tm source driver BU95408 description rohmlcd drivers for large panels are display drivers optimiz ed for large lcds in a variety of applications, including desktop pcs, laptops, and tvs. the broad lineup is offered in low amplitu de differential transmission interface type (rsds tm ) featuring low emi, 6bit gradation precis ion, and different output configurati ons (720 and up) for wide compatibility. features 1) 684/690/702/720 output channels 2) 6bit 9pair rsds tm inputs 3) dot & n-line inversion available 4) built-in 2ch repair amplifiers 5) correction is possible 6) built-in input data reversing function (inv) 7) output voltage range: av ss +0.1v ~ av dd - 0.1v 8) high speed data transfer: f clk(max) =85mhz 9) logic power supply voltage (dv dd ) : 2.3 ~ 3.6v 10) driver power supply voltage (av dd ) : 8.0 ~ 13.5v 11) package: cof48 applications tft lcd panels line up matrix bu95101 bu95303 bu95306 BU95408 number of outputs 384 384 / 414 / 420 / 432 600 / 618 / 630 / 642 684 / 690 / 702 / 720 no.10043eat04
technical note 2/14 www.rohm.com 2010.10 - rev. a ? 2010 rohm co., ltd. all rights reserved. BU95408
technical note 3/14 www.rohm.com 2010.10 - rev. a ? 2010 rohm co., ltd. all rights reserved. BU95408 ? ?
technical note 4/14 www.rohm.com 2010.10 - rev. a ? 2010 rohm co., ltd. all rights reserved. BU95408 ?
technical note 5/14 www.rohm.com 2010.10 - rev. a ? 2010 rohm co., ltd. all rights reserved. BU95408 block diagram fig.1 block diagram output buffer d/a converter data register y1 y2 y3 y 718 y 719 y 720 666 stb 14 level shifter 666 666 6 66 666 666 ????????????????? ????????????????? ????????????????? ????????????????? ????????????????? 2 2 data latch 240 bit bi-directional shift register rsds rx latch sftr r/l sftl dv dd dv ss sel1, sel0 irep2 orep2 clk p/n inv d 00p/n d 02p/n d 10p/n d 12p/n d 20p/n d 22p/n av dd av ss v0 v13 pol lpc0,lpc1 orep1 irep1
technical note 6/14 www.rohm.com 2010.10 - rev. a ? 2010 rohm co., ltd. all rights reserved. BU95408 pin configuration irep2 y720 orep2 y719 av dd y718 av ss ? dv ss dv dd ? sftl ? lpc1 d 22p d 22n ? d 21p d 21n ? d 20p d 20n ? d 12p d 12n ? d 11p d 11n ? d 10p d 10n ? dv dd lpc0 ? r/l v13 v12 ? v11 v10 BU95408 ? v9 v8 ? v7 av dd ? av ss top view v6 v5 ? v4 v3 ? v2 v1 ? v0 dv ss ? clk p clk n ? stb pol ? inv d 02p ? d 02n d 01p ? d 01n d 00p ? d 00n sel1 ? sel0 sftr ? dv dd dv ss av ss ? av dd y3 orep1 y2 irep1 y1 bump bump ic fig.2 pin configuration (top view)
technical note 7/14 www.rohm.com 2010.10 - rev. a ? 2010 rohm co., ltd. all rights reserved. BU95408 pin descriptions pin name in/out active descriptions d 00p/n ~ d 02p/n d 10p/n ~ d 12p/n d 20p/n ~ d 22p/n in differential rsds tm input terminals of display data the 3-bit differential input pairs generate the internal 6-bit data through the comparison between d xxp and d xxn . clk p/n in differential the rsds tm clock input pair generate the internal shift clock through the comparison between clk p and clk n . y1 ~ y720 out - driver outputs for d/a converted 64 gray scale analog voltage. r/l in - the shift direction of internal shift register is controlled by this pin as shown below. r/l=h : right shift sftr y1 y720 sftl r/l=l : left shift sftl y720y1 sftr sel0 sel1 in - the output channel number is controlled by this pin as shown below. sel1 sel0 number of effective output terminal invalid output terminal h h 720(default) - h l 702 y355 ~ y372 become hi-z l h 690 y349 ~ y378 become hi-z l l 684 y349 ~ y384 become hi-z this pin is pulled up to the dv dd inside the ic. lpc0 lpc1 in h low power control pin lpc1 lpc0 power condition h h strong power h l normal power l h ultra-low power l l low power(default). this pin is pulled down to the dv ss inside the ic. sftr in/out h sftr=h: right shift start pulse input terminal in cascade connection. sftr=l: carry output terminal in cascade connection. sftl in/out h sftl=h: carry output terminal in cascade connection. sftl=l: left shift start pulse input terminal in cascade connection. stb in the data in the data register are transferred to the data latch at the rising edge of stb, then the gray scale voltages are output from the buffer at the falling edge of stb. inv in h terminal to specify inverting or non-inverting of display data inv:h : input data are inverted in the ic. inv:l : input data are not inverted. v0 ~ v13 in - input for the -correction reference voltage the following external reference voltages are input. pol in - at the rising edge of stb, the state of pol are transferred to the driver. pol=h : the reference voltage for odd number outputs are v0 to v6 and those for even number outputs are v7 to v13. pol=l : the reference voltage for odd number outputs are v7 to v13 and those for even number outputs are v0 to v6 irep1,2 in - repair amplifier input orep1,2 out - repair amplifier output av dd in - power supply for driver block av ss in - ground for av dd dv dd in - power supply for digital block dv ss in - ground for dv dd
technical note 8/14 www.rohm.com 2010.10 - rev. a ? 2010 rohm co., ltd. all rights reserved. BU95408 relationship between input data and output terminals r/l=h (right shift) first last data d 00p ~ d 02n d 10p ~ d 12n d 20p ~ d 22n ? d 00p ~ d 02n d 10p ~ d 12n d 20p ~ d 22n output y1 y2 y3 ? y718 y719 y720 r/l=l (left shift) first last data d 00p ~ d 02n d 10p ~ d 12n d 20p ~ d 22n ? d 00p ~ d 02n d 10p ~ d 12n d 20p ~ d 22n output y718 y719 y720 ? y1 y2 y3 relationship between r/l , sftr , sftl and output direction r/l pin controls the shift direction of the internal shift resistor as shown below. terminal right shift mode left shift mode r/l ?h? ?l? sftr input output sftl output input output direction y1,y2,y3 y718,y719,y720 y720,y719,y718 y3,y2,y1 relationship between pol and output polarity pol ?h? ?l? y1 + *1 - * 1 y2 - + y3 + - y4 - + y5 + - y6 - + ? ? ? ? ? ? y715 + - y716 - + y717 + - y718 - + y719 + - y720 - + *1 +: the reference voltage are v0 ~ v6 -: the reference voltage are v7 ~ v13
technical note 9/14 www.rohm.com 2010.10 - rev. a ? 2010 rohm co., ltd. all rights reserved. BU95408 relationship between input data and output voltage the lcd driver output voltages ar e determined by the input data and 14 -corrected power supply. 0.1v Qv13 Q v12 Q v11 Qv10 Qv9 Qv8 Qv7 Q 0.5av dd 0.5 av dd Qv6 Qv5 Qv4 Qv3 Qv2 Qv1 Qv0 Qav dd -0.1v fig.3 input data - correction curve v0 (vh0) v1 (vh1) v2 (vh16) v3 (vh32) v4 (vh48) v5 (vh62) v6 (vh63) v7 (vl63) v8 (vl62) v9 (vl48) v10 (vl32) v11 (vl16) v12 (vl1) v13 (vl0) 00 01 16 32 48 63 62
technical note 10/14 www.rohm.com 2010.10 - rev. a ? 2010 rohm co., ltd. all rights reserved. BU95408 correction power supply circuit 14 external -corrected power supply is connected to ladder resistors inside ic. fig.4 correction power supply circuit external correction power supply ic internal circuit v0 v7 v8 v9 rs4 rs5 v1 v2 v3 v4 v5 v6 rs1 rs2 rs3 v10 v11 rs6 rs7 rs0 v12 v13
technical note 11/14 www.rohm.com 2010.10 - rev. a ? 2010 rohm co., ltd. all rights reserved. BU95408 sftr thd2 tsu2 thd1 tsu1 thd1 tsu1 d 00p/n d 01p/n d 02p/n d 10p/n d 11p/n d 12p/n d 20p/n d 21p/n d 22p/n y1 y1 y4 y7 (0) (1) (0) (1) (0) (1) y1 (2) y1 (3) y4 (2) y4 (3) y7 (2) (3) y1 (4) y1 (5) (4) y4 (5) y7 (4) y7 (5) (0) y2 (1) (0) y5 (1) (0) y8 (1) (2) (3) y5 (2) y5 (3) (2) (3) y2 (4) y2 (5) y5 (4) (5) y8 (4) y8 (5) (0) y3 (1) (0) y6 (1) (0) y9 (1) y3 (2) (3) y6 (2) y6 (3) y9 (2) (3) y3 (4) y3 (5) y6 (4) (5) y9 (4) y9 (5) clk p/n y2 y2 y2 y3 y3 y4 y4 y5 y5 y6 y6 y7 y7 y8 y8 y8 y9 y9 rsds tm data timing fig.5 rsds tm data timing
technical note 12/14 www.rohm.com 2010.10 - rev. a ? 2010 rohm co., ltd. all rights reserved. BU95408 timing chart fig.6 timing chart sftl output (sftr output) d xxp -d xxn sftr input (sftl input) stb yout clk p -clk n pol tl 1 2 3 240 241 th tw 1 2 last invalid even odd even odd even odd data invalid hi-z*1 tsp t ldt t wstb tsu1 thd1 tsu2 tdc tdc t stb-clk thd2 0v(dv ss ) v cm v dife t wsft t stb-sft tsu1 thd1 tdout 3 share*2 *1: hi-z period = t stb-clk + t wstb + 2clk period *2: share period = t wstb t stb-clk 1clk period
technical note 13/14 www.rohm.com 2010.10 - rev. a ? 2010 rohm co., ltd. all rights reserved. BU95408 start pulse timing when the start pulse (sftr, sftl) is input two times, the data is sampled based on the second start pulse. power supply sequence maintain the following power supply order to prevent the device from being destroyed. turn on power order : dv dd input signal av dd , v0~v13 turn off power order : av dd , v0~v13 input signal dv dd notes for use 1. when power is first supplied to the cmos ic, it is possible that the internal logic may be unstable and rush current may flow instantaneously. therefore, give special consideration to power coupling capa citance, power wiring, width of gnd wiring, and routing of connections. 2. for ics with more than one power supply, it is possible that rush current may flow instantaneously due to the internal powering sequence and delays. therefore, give special consideration to power coupling capa citance, power wiring, width of gnd wiring, and routing of wiring. 1(e) 1(o) 2(o) 2(e) clkp sftr input (sftl) data 2clk period over invalid 1 s t 2 n d dv ss , av ss t dv dd input signal v0 v13 av dd volta g e
technical note 14/14 www.rohm.com 2010.10 - rev. a ? 2010 rohm co., ltd. all rights reserved. BU95408 ordering part number b u 9 5 4 0 8 - s r part no. part no. reel packing specification sr: a pattern side is an inner arrow. the output side is the right side. sl: a pattern side is an inner arrow. the output side is the left side. br: a pattern side is an outside arrow. the output side is the right side. bl: a pattern side is an outside arrow. the output side is the left side. cof48
r1010 a www.rohm.com ? 2010 rohm co., ltd. all rights reserved. notice rohm customer support system http://www.rohm.com/contact/ thank you for your accessing to rohm product informations. more detail product informations and catalogs are available, please contact us. notes no copying or reproduction of this document, in part or in whole, is permitted without the consent of rohm co.,ltd. the content specied herein is subject to change for improvement without notice. the content specied herein is for the purpose of introducing rohm's products (hereinafter "products"). if you wish to use any such product, please be sure to refer to the specications, which can be obtained from rohm upon request. examples of application circuits, circuit constants and any other information contained herein illustrate the standard usage and operations of the products. the peripheral conditions must be taken into account when designing circuits for mass production. great care was taken in ensuring the accuracy of the information specied in this document. however, should you incur any damage arising from any inaccuracy or misprint of such information, rohm shall bear no responsibility for such damage. the technical information specied herein is intended only to show the typical functions of and examples of application circuits for the products. rohm does not grant you, explicitly or implicitly, any license to use or exercise intellectual property or other rights held by rohm and other parties. rohm shall bear no responsibility whatsoever for any dispute arising from the use of such technical information. the products specied in this document are intended to be used with general-use electronic equipment or devices (such as audio visual equipment, ofce-automation equipment, commu- nication devices, electronic appliances and amusement devices). the products specied in this document are not designed to be radiation tolerant. while rohm always makes efforts to enhance the quality and reliability of its products, a product may fail or malfunction for a variety of reasons. please be sure to implement in your equipment using the products safety measures to guard against the possibility of physical injury, re or any other damage caused in the event of the failure of any product, such as derating, redunda ncy, re control and fail-safe designs. rohm shall bear no responsibility whatsoever for your use of any product outside of the prescribed scope or not in accordance with the instruction manual. the products are not designed or manufactured to be used with any equipment, device or system which requires an extremely high level of reliability the failure or malfunction of which may result in a direct threat to human life or create a risk of human injury (such as a medical instrument, transportation equipment, aerospac e machinery, nuclear-reactor controller, fuel- controller or other safety device). rohm shall bear no responsibility in any way for use of any of the products for the above special purposes. if a product is intended to be used for any such special purpose, please contact a rohm sales representative before purchasing. if you intend to export or ship overseas any product or technology specied herein that may be controlled under the foreign exchange and the foreign trade law, you will be required to obtain a license or permit under the law.

▲Up To Search▲

Price & Availability of BU95408

	To Download BU95408 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .