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1/27 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. system led drivers for mobile phones 6leds illumination BD2802GU description the BD2802GU is a rgb led driver specifically engineered fo r decoration purposes.this rgb driver incorporates lighting patterns and illuminates without imposing any load on cpu.this rgb driver is best-suited fo r illumination using rgb leds and decoration using monochrome leds.in addition, this rgb driver has been successfully miniaturized through the use of a vcsp85h2 (2.8 mm 0.5 mm pitch) chip size package. features 1) rgb led driver (dual drivers) - a slope control function is incorporated (a llowing dual drivers to be controlled independently). - slope control can be implemented using the dc current. - two modes ?continuous illumination mode? and ?illumination single cycle mode? are supported. - independent external on/off synchronizing terminals (of dual drivers) are provided. - multiple drivers can be used concurrently by using the i 2 c address change function and supporting reference clock i/o. 2) thermal shutdown 3) i 2 c bus fast mode support (maximum rate: 400 khz) - a device address can be changed via an external pin. * this driver has not been designed for anti-radiation. * this document may be altered without prior notice. * this document does not provide for delivery. absolute ma ximum ratings(ta=25 ) parameter symbol limits unit maximum applied voltage vmax 7 v power dissipation pd 1250 (note1) mw operating temperatur e range topr -40 +85 storage temperature range tstg -55 +150 (note1)power dissipation deleting is 10.0mw/ o c, when it?s used in over 25 o c. (it?s deleting is on the board that is rohm?s standard) recommended operating conditions(vbat R vio, ta=-40 85 ) parameter symbol limits unit vbat input voltage vbat 2.7 5.5 v vio pin voltage vio 1.65 3.3 v no.11041eat12
technical note 2/27 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD2802GU ? ? ?
technical note 3/27 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD2802GU t1 t2 t3 t4 vbat2 i 2 c interface iref tsd r1led rgb1 rgbgnd digital control 1f/10v level shift vio resetb scl sd a vbat rgb1cnt g1led b1led r2led g2led vbat1 b2led vref i/o gnd1 gnd2 rgb2 rgb2cnt addsel slope control (rgb1) vbat slope control (rgb2) rgbiset clkio clkio 1f/10v e t4 g2led rgbgnd g1led t3 d b2led r2led b1led r1led vbat1 c vbat2 rgbise rgb1cnt a ddsel gnd2 b gnd1 index clkio scl sda a t1 rgb2cnt vio resetb t2 1 2 3 4 5
technical note 4/27 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD2802GU
technical note 5/27 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD2802GU
technical note 6/27 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD2802GU vbat c a vbat b e vbat u vbat f g vio vbat h vio vbat i vio vbat j vbat vbat l vbat vbat q vbat o vbat vbat x vbat vbat r vbat n vbat vbat s vio vbat v vio
technical note 7/27 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD2802GU ? ? ? ?
technical note 8/27 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD2802GU ?
technical note 9/27 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD2802GU B B
technical note 10/27 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD2802GU
technical note 11/27 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD2802GU adress 03h bit name init function 0 1 d7 - - - - d6 ir11(6) 0 ir11(6) ir11(5) ir11(4) ir11(3) ir11(2) ir11(1) ir11(0) current 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0.2ma ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
technical note 12/27 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD2802GU adress 07h bit name init function 0 1 d7 - - - - d6 ig12(6) 0 ig12(6) ig12(5) ig12(4) ig12(3) ig 12(2) ig12(1) ig12(0) current 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0.2ma ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
technical note 13/27 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD2802GU adress 0bh bit name init function 0 1 d7 - - - - d6 - - - - d5 - - - - d4 - - - - d3 pb1(3) 0 pb1(3) pb1(2) pb1(1) pb1(0) wave 0 0 0 0 pattern1 0 0 0 1 pattern2 0 0 1 0 pattern3 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
technical note 14/27 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD2802GU adress 0dh bit name init function 0 1 d7 - - - - d6 ir21(6) 0 ir21(6) ir21(5) ir21(4) ir21(3) ir21(2) ir21(1) ir21(0) current 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0.2ma ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
technical note 15/27 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD2802GU adress 11h bit name init function 0 1 d7 - - - - d6 ig22(6) 0 ig22(6) ig22(5) ig22(4) ig22(3) ig22(2) ig22(1) ig22(0) current 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0.2ma ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
technical note 16/27 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD2802GU adress 15h bit name init function 0 1 d7 - - - - d6 - - - - d5 - - - - d4 - - - - d3 pb2(3) 0 pb2(3) pb2(2) pb2(1) pb2(0) wave 0 0 0 0 pattern 1 0 0 0 1 pattern 2 0 0 1 0 pattern 3 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
technical note 17/27 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD2802GU ? ? ? vled rgb*en or rgb*os h the synchronism of rgb1/rgb2 the period of rgb1 and rgb2 and start, stop timing can be set up independently. when synchronizes rgb1 and rgb2, you must start an internal counter at the same time under the state of resetting. (internal counter are prepared for each of rgb1 and rgb2, so you must reset both.) inside counter can be reset by carrying out one of following actions. ? reset by hard reset (rstb_il). (rgb1, rgb2 is reset together.) ? reset by soft reset. (rgb1, rgb2 is reset together.) ? it is written register of the current setup (i1 n i2), the slope setup, the period setup and the pattern setup. internal counter of rgb1 is reset when it is written between address=0bh from 02h. internal counter of rgb2 is reset when it is written between address=15h from 0ch. counter is reset as to overwriting the same value. note) internal counter isn't reset if write rgb1en =l and rgb2en =l. (address=01h). when it write rgb1en=l (rgb2en=l), inside counter is held, and ic will operate from the held state at next restart. rgb*en rgb*os t on led 5y (max:20ms) rgb*en or rfb*os led current
technical note 18/27 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD2802GU ? ? ? ? ? ? ? ? ? ? ? ? ?
technical note 19/27 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD2802GU rgb wave setting timing diagram 6. clock i/o a reference clock i/o function is mounted in this ic chip. when two ic chips are used to extend an illumination capability, clock supply to the other rgb led driver can be accomplished for synchronization with this lsi chip. this setting can be made via the register. clock output can be made with clken=1 and clkmd=1. register clkio terminal state clock reception clken clkmd 0 0/1 input does not receive external clocks. 1 0 input operates on external clocks. 1 output - wave cycle wave pattern 1 slope down transition
technical note 20/27 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD2802GU ? ? ? ? ? ? ? ?` `? `?? ? ?`?????? ?
technical note 21/27 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD2802GU 7. rgb waveform setting examples `? ??? Bgk ` ??`
technical note 22/27 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD2802GU 8. rgb slope waveforms - example of waveform at activation current setting: i1 < i2 current setting: i1 > i2 - current difference in each channel (example) 9. setting change in slope duration a slope operation is performed by an internal sequencer. when an attempt is made to change the setting in a slope duration, the active slope operation is reset and a newly set slope operation is restarted. in this case, however, led lighting stops for a maximum of 16.4ms (osc frequency=typ) for synchronization with the internal clock until the operation is restarted. i1 (b ) i2 (b ) i1(a) i2 (a ) i1 i2 (off) rgb*en or rgb*os = 1 (rgb*en = 1) (rgb*os = 1) rgb*en = 0 i2 i1 (off) rgb*en or rgb*os = 1 (rgb*en = 1) (rgb*os = 1) rgb*en = 0 slope duration transition takes place in units of steps but the time per step is set based on internal calculation so that the slope arrival time is quasi-equal.
technical note 23/27 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD2802GU ? ?
technical note 24/27 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD2802GU
technical note 25/27 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD2802GU
technical note 26/27 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD2802GU
technical note 27/27 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD2802GU ordering part number b d 2 8 0 2 g u - e 2 part no. part no. 2802 package gu : vcsp85h2 packaging and forming specification e2: embossed tape and reel (unit : mm) vcsp85h2 (BD2802GU) s 0.08 s a b ba 0.05 12345 a b c d e ( 0.15)index post 1.0max 0.25 0.1 0.4 0.1 1pin mark 2.8 0.1 2.8 0.1 0.4 0.1 p=0.5 4 p=0.5 4 24- 0.30 0.05 ? order quantity needs to be multiple of the minimum quantity. embossed carrier tape tape quantity direction of feed the direction is the 1pin of product is at the upper left when you hold reel on the left hand and you pull out the tape on the right hand 3000pcs e2 () direction of feed reel 1pin
r1120 a www.rohm.com ? 2011 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 produc ts. 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, redundancy, 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, aerospace 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.

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