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1/51 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. led driver s for lcd backlights mulitifunction backlight led driver for small lcd panels (charge pump type) BD6088GUL description BD6088GUL is ?intelligent led dr iver? that is the most suitable for the cellular phone. it has 6led driver for lcd backlight and gpo 4 port. it has alc function, that is ?low po wer consumption system? realized. it can be developed widely from the model high end to the model low end. as it has charge pump circuit for dcdc, it is no ne ed to use coils, and it contributes to small space. vcsp50l3(3.50mm3.50mm 0.5mm space) it adopts the very thin csp package that is the most suitable for the slim phone. functions 1) total 6leds driver for lcd backlight it have 4leds (it can select 4led or 3led) for exclusire use of main and 2leds which can chose independent control or a main allotmert by resister setting. ?main group? can be controlled by auto luminous control (alc) system. ?main group? can be controlled by external pwm signal. on/ off and a setup of electric current are possible at t he time of the independent c ontrol by the independence. 2) ambient light sensor interface main backlight can be controlled by ambient brightness. photo diode, photo transistor, photo ic(linear/logarithm) can be connected. bias source for ambient light sensor, gain and offset adjustment are built in. led driver current as ambient level can be customized. 3) charge pump dc/dc for led driver it has x1/x1.5/ x2 mode that will be selected automatically. the most suitable voltage up magnification is controlled automatically by led port voltage. output voltage fixed mode functi on loading (3.9v/4.2v/4.5v/4.8v) soft start functions, over voltage protection (auto-return type), over current protection (auto-return type) loading 4) gpo 4 port open drain output and slope control loading 5) thermal shutdown 6) i 2 c bus fs mode(max 400khz) *this chip is not designed to protect itself against radioactive rays. *this material may be changed on its way to designing. *this material is not the official specification. absolute maximum ratings (ta=25 o c) parameter symbol ratings unit maximum voltage vmax 7 v power dissipation pd 1380 (note mw operating temperatur e range topr -30 +85 storage temperature range tstg -55 +150 note) power dissipation deleting is 11.04mw/ o c, when it?s used in over 25 o c. (it?s deleting is on the board that is rohm?s standard) operating conditions (vbat vio, ta=-35~85 o c) parameter symbol ratings unit vbat input voltage vbat 2.7 5.5 v vio pin voltage vio 1.65 3.3 v no.11040eat29
technical note 2/51 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD6088GUL R ?
technical note 3/51 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD6088GUL ?
technical note 4/51 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD6088GUL ?? vbat key pad led outcnt (open) alc slope control slope control slope control slope control sensor i/f sbias bh1600fvc sgnd gc1 1
technical note 5/51 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD6088GUL ?? vbat key pad led outcnt (open) alc slope control slope control slope control slope control sensor i/f sbias bh1600fvc sgnd gc1 1
technical note 6/51 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD6088GUL
technical note 7/51 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD6088GUL
technical note 8/51 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD6088GUL
technical note 9/51 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD6088GUL vbat c a vbat b e u vbat f vio vbat h vio vbat i vio vbat j vbat vbat l vbat vbat q vos vbat x vbat vbat r vbat n vbat vbat s vbat w vio vbat vbat m vio vbat y g vbat vbat v
technical note 10/51 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD6088GUL ? ? ? ?
technical note 11/51 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD6088GUL ? ? ?
technical note 12/51 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD6088GUL
technical note 13/51 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD6088GUL
technical note 14/51 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD6088GUL
technical note 15/51 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD6088GUL address 01h < led pin function setting> address r/w bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 01h w wpwmen wpwmpol - - w6md w5md w4md mledmd initial value 42h 0 1 - - 0 0 1 0 bit7 : wpwmen external pwm input ?wpwmin? terminal enable control (valid/invalid) ?0? : external pwm input invalid ?1? : external pwm input valid refer to ?(11) current adjustment? of ?the explanation of alc? for detail. bit6 : wpwmpol polarity setting of external pwm input "wpwmin" terminal ?0? : external pwm ?l? drive ?1? : external pwm ?h? drive refer to ?(11) current adjustment? of ?the explanation of alc? for detail. bit [5:4] : (not used) bit3 : w6md led6 control setting (individual / main group) ?0? : led6 individual control ?1? : led6 main group control refer to ?led driver? for detail. bit2 : w5md led5 control setting (individual / main group) ?0? : led5 individual control ?1? : led5 use (main group) refer to ?led driver? for detail. bit1 : w4md led4 movement setting (unuse / use) ?0? : led4 unuse ?1? : led4 use (main group control) refer to ?led driver? for detail. bit0 : mledmd main group setting (normal / alc) ?0? : main group normal mode(alcnon-reflection) ?1? : main group alc mode refer to ?(1) auto luminous control on/off? of ?the explanation of alc? for detail. set up a fixation in every design because it isn't presumed w*pw that it is changed dynamically. and, do the setup of w*pw when each led is off.
technical note 16/51 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD6088GUL address 02h < power control> address r/w bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 02h w/r - - - - alcen w6en w5en mleden initial value 00h - - - - 0 0 0 0 bit [7:4] : (not used) bit3 : alcen alc function control (on/off) ?0? : alc block off ?1? : alc block on (ambient measurement) bit2 : w6en led6 control (on/off) ?0? : led6 off ?1? : led6 on(individual control) bit1 : w5en led5 control (on/off) ?0? : led5 off ?1? : led5 on(individual control) bit0 : mleden main group led control (on/off) ?0? : main group off ?1? : main group on
technical note 17/51 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD6088GUL address 03h < main group led current setting(normal mode) > address r/w bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 03h w - imled(6) imled(5) imled(4) im led(3) imled(2) imled(1) imled(0) initial value 00h - 0 0 0 0 0 0 0 bit7 : (not used) bit [6:0] : imled (6:0) main group led current setting at non-alc mode ?0000000? : 0.2 ma ?1000000? : 13.0 ma ?0000001? : 0.4 ma ?1000001? : 13.2 ma ?0000010? : 0.6 ma ?1000010? : 13.4 ma ?0000011? : 0.8 ma ?1000011? : 13.6 ma ?0000100? : 1.0 ma ?1000100? : 13.8 ma ?0000101? : 1.2 ma ?1000101? : 14.0 ma ?0000110? : 1.4 ma ?1000110? : 14.2 ma ?0000111? : 1.6 ma ?1000111? : 14.4 ma ?0001000? : 1.8 ma ?1001000? : 14.6 ma ?0001001? : 2.0 ma ?1001001? : 14.8 ma ?0001010? : 2.2 ma ?1001010? : 15.0 ma ?0001011? : 2.4 ma ?1001011? : 15.2 ma ?0001100? : 2.6 ma ?1001100? : 15.4 ma ?0001101? : 2.8 ma ?1001101? : 15.6 ma ?0001110? : 3.0 ma ?1001110? : 15.8 ma ?0001111? : 3.2 ma ?1001111? : 16.0 ma ?0010000? : 3.4 ma ?1010000? : 16.2 ma ?0010001? : 3.6 ma ?1010001? : 16.4 ma ?0010010? : 3.8 ma ?1010010? : 16.6 ma ?0010011? : 4.0 ma ?1010011? : 16.8 ma ?0010100? : 4.2 ma ?1010100? : 17.0 ma ?0010101? : 4.4 ma ?1010101? : 17.2 ma ?0010110? : 4.6 ma ?1010110? : 17.4 ma ?0010111? : 4.8 ma ?1010111? : 17.6 ma ?0011000? : 5.0 ma ?1011000? : 17.8 ma ?0011001? : 5.2 ma ?1011001? : 18.0 ma ?0011010? : 5.4 ma ?1011010? : 18.2 ma ?0011011? : 5.6 ma ?1011011? : 18.4 ma ?0011100? : 5.8 ma ?1011100? : 18.6 ma ?0011101? : 6.0 ma ?1011101? : 18.8 ma ?0011110? : 6.2 ma ?1011110? : 19.0 ma ?0011111? : 6.4 ma ?1011111? : 19.2 ma ?0100000? : 6.6 ma ?1100000? : 19.4 ma ?0100001? : 6.8 ma ?1100001? : 19.6 ma ?0100010? : 7.0 ma ?1100010? : 19.8 ma ?0100011? : 7.2 ma ?1100011? : 20.0 ma ?0100100? : 7.4 ma ?1100100? : 20.2 ma ?0100101? : 7.6 ma ?1100101? : 20.4 ma ?0100110? : 7.8 ma ?1100110? : 20.6 ma ?0100111? : 8.0 ma ?1100111? : 20.8 ma ?0101000? : 8.2 ma ?1101000? : 21.0 ma ?0101001? : 8.4 ma ?1101001? : 21.2 ma ?0101010? : 8.6 ma ?1101010? : 21.4 ma ?0101011? : 8.8 ma ?1101011? : 21.6 ma ?0101100? : 9.0 ma ?1101100? : 21.8 ma ?0101101? : 9.2 ma ?1101101? : 22.0 ma ?0101110? : 9.4 ma ?1101110? : 22.2 ma ?0101111? : 9.6 ma ?1101111? : 22.4 ma ?0110000? : 9.8 ma ?1110000? : 22.6 ma ?0110001? : 10.0 ma ?1110001? : 22.8 ma ?0110010? : 10.2 ma ?1110010? : 23.0 ma ?0110011? : 10.4 ma ?1110011? : 23.2 ma ?0110100? : 10.6 ma ?1110100? : 23.4 ma ?0110101? : 10.8 ma ?1110101? : 23.6 ma ?0110110? : 11.0 ma ?1110110? : 23.8 ma ?0110111? : 11.2 ma ?1110111? : 24.0 ma ?0111000? : 11.4 ma ?1111000? : 24.2 ma ?0111001? : 11.6 ma ?1111001? : 24.4 ma ?0111010? : 11.8 ma ?1111010? : 24.6 ma ?0111011? : 12.0 ma ?1111011? : 24.8 ma ?0111100? : 12.2 ma ?1111100? : 25.0 ma ?0111101? : 12.4 ma ?1111101? : 25.2 ma ?0111110? : 12.6 ma ?1111110? : 25.4 ma ?0111111? : 12.8 ma ?1111111? : 25.6 ma
technical note 18/51 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD6088GUL address 04h < led5 current setting(independence control) > address r/w bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 04h w - iw5(6) iw5(5) iw5(4) iw 5(3) iw5(2) iw5(1) iw5(0) initial value 00h - 0 0 0 0 0 0 0 bit7 : (not used) bit [6:0] : iw5 (6:0) led5 current setting ?0000000? : 0.2 ma ?1000000? : 13.0 ma ?0000001? : 0.4 ma ?1000001? : 13.2 ma ?0000010? : 0.6 ma ?1000010? : 13.4 ma ?0000011? : 0.8 ma ?1000011? : 13.6 ma ?0000100? : 1.0 ma ?1000100? : 13.8 ma ?0000101? : 1.2 ma ?1000101? : 14.0 ma ?0000110? : 1.4 ma ?1000110? : 14.2 ma ?0000111? : 1.6 ma ?1000111? : 14.4 ma ?0001000? : 1.8 ma ?1001000? : 14.6 ma ?0001001? : 2.0 ma ?1001001? : 14.8 ma ?0001010? : 2.2 ma ?1001010? : 15.0 ma ?0001011? : 2.4 ma ?1001011? : 15.2 ma ?0001100? : 2.6 ma ?1001100? : 15.4 ma ?0001101? : 2.8 ma ?1001101? : 15.6 ma ?0001110? : 3.0 ma ?1001110? : 15.8 ma ?0001111? : 3.2 ma ?1001111? : 16.0 ma ?0010000? : 3.4 ma ?1010000? : 16.2 ma ?0010001? : 3.6 ma ?1010001? : 16.4 ma ?0010010? : 3.8 ma ?1010010? : 16.6 ma ?0010011? : 4.0 ma ?1010011? : 16.8 ma ?0010100? : 4.2 ma ?1010100? : 17.0 ma ?0010101? : 4.4 ma ?1010101? : 17.2 ma ?0010110? : 4.6 ma ?1010110? : 17.4 ma ?0010111? : 4.8 ma ?1010111? : 17.6 ma ?0011000? : 5.0 ma ?1011000? : 17.8 ma ?0011001? : 5.2 ma ?1011001? : 18.0 ma ?0011010? : 5.4 ma ?1011010? : 18.2 ma ?0011011? : 5.6 ma ?1011011? : 18.4 ma ?0011100? : 5.8 ma ?1011100? : 18.6 ma ?0011101? : 6.0 ma ?1011101? : 18.8 ma ?0011110? : 6.2 ma ?1011110? : 19.0 ma ?0011111? : 6.4 ma ?1011111? : 19.2 ma ?0100000? : 6.6 ma ?1100000? : 19.4 ma ?0100001? : 6.8 ma ?1100001? : 19.6 ma ?0100010? : 7.0 ma ?1100010? : 19.8 ma ?0100011? : 7.2 ma ?1100011? : 20.0 ma ?0100100? : 7.4 ma ?1100100? : 20.2 ma ?0100101? : 7.6 ma ?1100101? : 20.4 ma ?0100110? : 7.8 ma ?1100110? : 20.6 ma ?0100111? : 8.0 ma ?1100111? : 20.8 ma ?0101000? : 8.2 ma ?1101000? : 21.0 ma ?0101001? : 8.4 ma ?1101001? : 21.2 ma ?0101010? : 8.6 ma ?1101010? : 21.4 ma ?0101011? : 8.8 ma ?1101011? : 21.6 ma ?0101100? : 9.0 ma ?1101100? : 21.8 ma ?0101101? : 9.2 ma ?1101101? : 22.0 ma ?0101110? : 9.4 ma ?1101110? : 22.2 ma ?0101111? : 9.6 ma ?1101111? : 22.4 ma ?0110000? : 9.8 ma ?1110000? : 22.6 ma ?0110001? : 10.0 ma ?1110001? : 22.8 ma ?0110010? : 10.2 ma ?1110010? : 23.0 ma ?0110011? : 10.4 ma ?1110011? : 23.2 ma ?0110100? : 10.6 ma ?1110100? : 23.4 ma ?0110101? : 10.8 ma ?1110101? : 23.6 ma ?0110110? : 11.0 ma ?1110110? : 23.8 ma ?0110111? : 11.2 ma ?1110111? : 24.0 ma ?0111000? : 11.4 ma ?1111000? : 24.2 ma ?0111001? : 11.6 ma ?1111001? : 24.4 ma ?0111010? : 11.8 ma ?1111010? : 24.6 ma ?0111011? : 12.0 ma ?1111011? : 24.8 ma ?0111100? : 12.2 ma ?1111100? : 25.0 ma ?0111101? : 12.4 ma ?1111101? : 25.2 ma ?0111110? : 12.6 ma ?1111110? : 25.4 ma ?0111111? : 12.8 ma ?1111111? : 25.6 ma
technical note 19/51 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD6088GUL address 05h < led6 current setting(independence control) > address r/w bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 05h w - iw6(6) iw6(5) iw6(4) iw 6(3) iw6(2) iw6(1) iw6(0) initial value 00h - 0 0 0 0 0 0 0 bit7 : (not used) bit [6:0] : iw6 (6:0) led6 current setting ?0000000? : 0.2 ma ?1000000? : 13.0 ma ?0000001? : 0.4 ma ?1000001? : 13.2 ma ?0000010? : 0.6 ma ?1000010? : 13.4 ma ?0000011? : 0.8 ma ?1000011? : 13.6 ma ?0000100? : 1.0 ma ?1000100? : 13.8 ma ?0000101? : 1.2 ma ?1000101? : 14.0 ma ?0000110? : 1.4 ma ?1000110? : 14.2 ma ?0000111? : 1.6 ma ?1000111? : 14.4 ma ?0001000? : 1.8 ma ?1001000? : 14.6 ma ?0001001? : 2.0 ma ?1001001? : 14.8 ma ?0001010? : 2.2 ma ?1001010? : 15.0 ma ?0001011? : 2.4 ma ?1001011? : 15.2 ma ?0001100? : 2.6 ma ?1001100? : 15.4 ma ?0001101? : 2.8 ma ?1001101? : 15.6 ma ?0001110? : 3.0 ma ?1001110? : 15.8 ma ?0001111? : 3.2 ma ?1001111? : 16.0 ma ?0010000? : 3.4 ma ?1010000? : 16.2 ma ?0010001? : 3.6 ma ?1010001? : 16.4 ma ?0010010? : 3.8 ma ?1010010? : 16.6 ma ?0010011? : 4.0 ma ?1010011? : 16.8 ma ?0010100? : 4.2 ma ?1010100? : 17.0 ma ?0010101? : 4.4 ma ?1010101? : 17.2 ma ?0010110? : 4.6 ma ?1010110? : 17.4 ma ?0010111? : 4.8 ma ?1010111? : 17.6 ma ?0011000? : 5.0 ma ?1011000? : 17.8 ma ?0011001? : 5.2 ma ?1011001? : 18.0 ma ?0011010? : 5.4 ma ?1011010? : 18.2 ma ?0011011? : 5.6 ma ?1011011? : 18.4 ma ?0011100? : 5.8 ma ?1011100? : 18.6 ma ?0011101? : 6.0 ma ?1011101? : 18.8 ma ?0011110? : 6.2 ma ?1011110? : 19.0 ma ?0011111? : 6.4 ma ?1011111? : 19.2 ma ?0100000? : 6.6 ma ?1100000? : 19.4 ma ?0100001? : 6.8 ma ?1100001? : 19.6 ma ?0100010? : 7.0 ma ?1100010? : 19.8 ma ?0100011? : 7.2 ma ?1100011? : 20.0 ma ?0100100? : 7.4 ma ?1100100? : 20.2 ma ?0100101? : 7.6 ma ?1100101? : 20.4 ma ?0100110? : 7.8 ma ?1100110? : 20.6 ma ?0100111? : 8.0 ma ?1100111? : 20.8 ma ?0101000? : 8.2 ma ?1101000? : 21.0 ma ?0101001? : 8.4 ma ?1101001? : 21.2 ma ?0101010? : 8.6 ma ?1101010? : 21.4 ma ?0101011? : 8.8 ma ?1101011? : 21.6 ma ?0101100? : 9.0 ma ?1101100? : 21.8 ma ?0101101? : 9.2 ma ?1101101? : 22.0 ma ?0101110? : 9.4 ma ?1101110? : 22.2 ma ?0101111? : 9.6 ma ?1101111? : 22.4 ma ?0110000? : 9.8 ma ?1110000? : 22.6 ma ?0110001? : 10.0 ma ?1110001? : 22.8 ma ?0110010? : 10.2 ma ?1110010? : 23.0 ma ?0110011? : 10.4 ma ?1110011? : 23.2 ma ?0110100? : 10.6 ma ?1110100? : 23.4 ma ?0110101? : 10.8 ma ?1110101? : 23.6 ma ?0110110? : 11.0 ma ?1110110? : 23.8 ma ?0110111? : 11.2 ma ?1110111? : 24.0 ma ?0111000? : 11.4 ma ?1111000? : 24.2 ma ?0111001? : 11.6 ma ?1111001? : 24.4 ma ?0111010? : 11.8 ma ?1111010? : 24.6 ma ?0111011? : 12.0 ma ?1111011? : 24.8 ma ?0111100? : 12.2 ma ?1111100? : 25.0 ma ?0111101? : 12.4 ma ?1111101? : 25.2 ma ?0111110? : 12.6 ma ?1111110? : 25.4 ma ?0111111? : 12.8 ma ?1111111? : 25.6 ma
technical note 20/51 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD6088GUL address 06h < main current slope time setting > address r/w bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 06h w thl(3) thl(2) thl(1) thl(0) tlh(3) tlh(2) tlh(1) tlh(0) initial value c7h 1 1 0 0 0 1 1 1 bit [7:4] : thl (3:0) main led current down transition per 0.2ma step ?0000? : 0.256 ms ?0001? : 0.512 ms ?0010? : 1.024 ms ?0011? : 2.048 ms ?0100? : 4.096 ms ?0101? : 8.192 ms ?0110? : 16.38 ms ?0111? : 32.77 ms ?1000? : 65.54 ms ?1001? : 131.1 ms ?1010? : 196.6 ms ?1011? : 262.1 ms ?1100? : 327.7 ms (initial value) ?1101? : 393.2 ms ?1110? : 458.8 ms ?1111? : 524.3 ms setting time is counted based on the switching frequency of charge pump. the above value becomes the value of the typ (1mhz) time. refer to ?(9) slope process? of ?the explanation of alc? for detail. bit [3:0] : tlh (3:0) main led current up transition per 0.2ma step ?0000? : 0.256 ms ?0001? : 0.512 ms ?0010? : 1.024 ms ?0011? : 2.048 ms ?0100? : 4.096 ms ?0101? : 8.192 ms ?0110? : 16.38 ms ?0111? : 32.77 ms (initial value) ?1000? : 65.54 ms ?1001? : 131.1 ms ?1010? : 196.6 ms ?1011? : 262.1 ms ?1100? : 327.7 ms ?1101? : 393.2 ms ?1110? : 458.8 ms ?1111? : 524.3 ms setting time is counted based on the switching frequency of charge pump. the above value becomes the value of the typ (1mhz) time. refer to ?(9) slope process? of ?the explanation of alc? for detail.
technical note 21/51 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD6088GUL address 07h < alc mode setting > address r/w bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 07h w adcyc(1) adcyc(0) gain(1) gain(0) stype vsb mdcir sbiason initial value 81h 1 0 0 0 0 0 0 1 bit [7:6] : adcyc(1:0) adc measurement cycle ?00? : 0.52 s ?01? : 1.05 s ?10? : 1.57 s (initial value) ?11? : 2.10 s refer to ?(4) a/d conversion? of ?the explanation of alc? for detail. bit [5:4] : gain(1:0) sensor gain switching function cont rol (this is effective only at stype=?0?.) ?00? : auto change (initial value) ?01? : high ?10? : low ?11? : fixed refer to ?(3) gain control? of ?the explanation of alc? for detail. bit3 : stype ambient light sensor type select (linear/logarithm) ?0? : for linear sensor (initial value) ?1? : for log sensor refer to ?(7) ambient level detection? of ?the explanation of alc? for detail. bit2 : vsb sbias output voltage control ?0? : sbias output voltage 3.0v (initial value) ?1? : sbias output voltage 2.6v refer to ?(2) i/v conversion? of ?the explanation of alc? for detail. bit1 : mdcir led current reset select by mode change ?0? : led current non-reset when mode change (initial value) ?1? : led current reset when mode change refer to ?(10) led current reset when mode change? of ?the explanation of alc? for detail. bit0 : sbiason ?0? : measurement cycle synchronous ?1? : usually on (at alcen=1) (initial value) refer to ?(4) a/d conversion? of ?the explanation of alc? for detail.
technical note 22/51 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD6088GUL address 08h < adc data adjustment > address r/w bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 08h w sofs(3) sofs(2) sofs(1) sofs(0) sgain(3) sgain(2) sg ain(1) sgain(0) initial value 00h 0 0 0 0 0 0 0 0 bit [7:4] : sofs (3:0) adc data offset adjustment ?1000? : -8 lsb ?1001? : -7 lsb ?1010? : -6 lsb ?1011? : -5 lsb ?1100? : -4 lsb ?1101? : -3 lsb ?1110? : -2 lsb ?1111? : -1 lsb ?0000? : no adjustment ?0001? : +1 lsb ?0010? : +2 lsb ?0011? : +3 lsb ?0100? : +4 lsb ?0101? : +5 lsb ?0110? : +6 lsb ?0111? : +7 lsb offset adjust is performed to adc data. refer to ?(5) adc data gain/offset adjustment? of ?the explanation of alc? for detail. bit [3:0] : sgain (3:0) adc data inclination adjustment ?1000? : reserved ?1001? : reserved ?1010? : -37.50% ?1011? : -31.25% ?1100? : -25.00% ?1101? : -18.75% ?1110? : -12.50% ?1111? : -6.25% ?0000? : no adjustment ?0001? : +6.25% ?0010? : +12.50% ?0011? : +18.75% ?0100? : +25.00% ?0101? : +31.25% ?0110? : +37.50% ?0111? : reserved gain adjust is performed to adc data. the data after adjustment are round off by 8-bit data. refer to ?(5) adc data gain/offset adjustment? of ?the explanation of alc? for detail.
technical note 23/51 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD6088GUL address 09h < ambient level (read only) > address r/w bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 09h r - - - - amb(3) amb(2) amb(1) amb(0) initial value (00h) - - - - (0) (0) (0) (0) bit [7:4] : (not used) bit [3:0] : amb (3:0) ambient level ?0000? : 0h ?0001? : 1h ?0010? : 2h ?0011? : 3h ?0100? : 4h ?0101? : 5h ?0110? : 6h ?0111? : 7h ?1000? : 8h ?1001? : 9h ?1010? : ah ?1011? : bh ?1100? : ch ?1101? : dh ?1110? : eh ?1111? : fh it begins to read ambient data through i2c, and possible. to the first ad measurement completion, it is amb(3:0)=0000. refer to ?(7) ambient level detection? of ?the explanation of alc? for detail.
technical note 24/51 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD6088GUL address 0ah~19h < ambient led current setting > address r/w bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 0ah~19h w iu*(7) iu*(6) iu*(5) iu*( 4) iu*(3) iu*(2) iu*(1) iu*(0) initial value - refer to after page for initial table. ?*? means 0~f. bit7 : (not used) bit [6:0] : iu* (6:0) main current at ambient level for 0h~fh ?0000000? : 0.2 ma ?1000000? : 13.0 ma ?0000001? : 0.4 ma ?1000001? : 13.2 ma ?0000010? : 0.6 ma ?1000010? : 13.4 ma ?0000011? : 0.8 ma ?1000011? : 13.6 ma ?0000100? : 1.0 ma ?1000100? : 13.8 ma ?0000101? : 1.2 ma ?1000101? : 14.0 ma ?0000110? : 1.4 ma ?1000110? : 14.2 ma ?0000111? : 1.6 ma ?1000111? : 14.4 ma ?0001000? : 1.8 ma ?1001000? : 14.6 ma ?0001001? : 2.0 ma ?1001001? : 14.8 ma ?0001010? : 2.2 ma ?1001010? : 15.0 ma ?0001011? : 2.4 ma ?1001011? : 15.2 ma ?0001100? : 2.6 ma ?1001100? : 15.4 ma ?0001101? : 2.8 ma ?1001101? : 15.6 ma ?0001110? : 3.0 ma ?1001110? : 15.8 ma ?0001111? : 3.2 ma ?1001111? : 16.0 ma ?0010000? : 3.4 ma ?1010000? : 16.2 ma ?0010001? : 3.6 ma ?1010001? : 16.4 ma ?0010010? : 3.8 ma ?1010010? : 16.6 ma ?0010011? : 4.0 ma ?1010011? : 16.8 ma ?0010100? : 4.2 ma ?1010100? : 17.0 ma ?0010101? : 4.4 ma ?1010101? : 17.2 ma ?0010110? : 4.6 ma ?1010110? : 17.4 ma ?0010111? : 4.8 ma ?1010111? : 17.6 ma ?0011000? : 5.0 ma ?1011000? : 17.8 ma ?0011001? : 5.2 ma ?1011001? : 18.0 ma ?0011010? : 5.4 ma ?1011010? : 18.2 ma ?0011011? : 5.6 ma ?1011011? : 18.4 ma ?0011100? : 5.8 ma ?1011100? : 18.6 ma ?0011101? : 6.0 ma ?1011101? : 18.8 ma ?0011110? : 6.2 ma ?1011110? : 19.0 ma ?0011111? : 6.4 ma ?1011111? : 19.2 ma ?0100000? : 6.6 ma ?1100000? : 19.4 ma ?0100001? : 6.8 ma ?1100001? : 19.6 ma ?0100010? : 7.0 ma ?1100010? : 19.8 ma ?0100011? : 7.2 ma ?1100011? : 20.0 ma ?0100100? : 7.4 ma ?1100100? : 20.2 ma ?0100101? : 7.6 ma ?1100101? : 20.4 ma ?0100110? : 7.8 ma ?1100110? : 20.6 ma ?0100111? : 8.0 ma ?1100111? : 20.8 ma ?0101000? : 8.2 ma ?1101000? : 21.0 ma ?0101001? : 8.4 ma ?1101001? : 21.2 ma ?0101010? : 8.6 ma ?1101010? : 21.4 ma ?0101011? : 8.8 ma ?1101011? : 21.6 ma ?0101100? : 9.0 ma ?1101100? : 21.8 ma ?0101101? : 9.2 ma ?1101101? : 22.0 ma ?0101110? : 9.4 ma ?1101110? : 22.2 ma ?0101111? : 9.6 ma ?1101111? : 22.4 ma ?0110000? : 9.8 ma ?1110000? : 22.6 ma ?0110001? : 10.0 ma ?1110001? : 22.8 ma ?0110010? : 10.2 ma ?1110010? : 23.0 ma ?0110011? : 10.4 ma ?1110011? : 23.2 ma ?0110100? : 10.6 ma ?1110100? : 23.4 ma ?0110101? : 10.8 ma ?1110101? : 23.6 ma ?0110110? : 11.0 ma ?1110110? : 23.8 ma ?0110111? : 11.2 ma ?1110111? : 24.0 ma ?0111000? : 11.4 ma ?1111000? : 24.2 ma ?0111001? : 11.6 ma ?1111001? : 24.4 ma ?0111010? : 11.8 ma ?1111010? : 24.6 ma ?0111011? : 12.0 ma ?1111011? : 24.8 ma ?0111100? : 12.2 ma ?1111100? : 25.0 ma ?0111101? : 12.4 ma ?1111101? : 25.2 ma ?0111110? : 12.6 ma ?1111110? : 25.4 ma ?0111111? : 12.8 ma ?1111111? : 25.6 ma
technical note 25/51 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD6088GUL address 1ah < key driver 2 value decision control setting > address r/w bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 1ah w - - chys(1) chys(0) cth(3) cth(2) cth(1) cth(0) initial value 2ah - - 1 0 1 0 1 0 bit [7:6] : (not used) bit [5:4] : chys(1:0) key driveron brightness hysteresis ?00? : ambient 1h width ?01? : ambient 2h width ?10? : ambient 3h width (initial) ?11? : ambient 4h width refer to ?(12) key back light value decision? of ?the explanation of alc? for detail. bit [3:0] : cth (3:0) key driveroff brightness threshold ?0000? : ambient level 0h off ?0001? : ambient level 1h off ?0010? : ambient level 2h off ?0011? : ambient level 3h off ?0100? : ambient level 4h off ?0101? : ambient level 5h off ?0110? : ambient level 6h off ?0111? : ambient level 7h off ?1000? : ambient level 8h off ?1001? : ambient level 9h off ?1010? : ambient level ah off (initial) ?1011? : ambient level bh off ?1100? : ambient level ch off ?1101? : ambient level dh off ?1110? : ambient level eh off ?1111? : ambient level fh off refer to ?(12) key back light value decision? of ?the explanation of alc? for detail.
technical note 26/51 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD6088GUL address 1bh < out key output mode setting > address r/w bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 1bh w - - - kbmd out4md out3md out2md out1md initial value 00h - - - 0 0 0 0 0 bit [7:5] : (not used) bit4 : kbmd key back light mode choice (alc/ individual) ?0? : kblt alc control ?1? : kblt individual control refer to ?(13) key back light pwm control? of ?the explanation of ? alc? for detail. bit3 : out4md outcnt external control setting ?0? : outcnt invalid, out4 output depends on output control by out4en. ?1? : out4 output depends on output control by out4en with outcnt=h. with outcnt=l, out4=hi-z (compulsory off). refer to ?the explanation of outpwm control? for detail. bit2 : out3md outcnt external control setting ?0? : outcnt invalid, out3 output depends on output control by out3en. ?1? : out3 output depends on output control by out3en with outcnt=h. with outcnt=l, out3=hi-z (compulsory off). refer to ?the explanation of outpwm control? for detail. bit1 : out2md outcnt external control setting ?0? : outcnt invalid, out2 output depends on output control by out2en. ?1? : out2 output depends on output control by out2en with outcnt=h. with outcnt=l, out2=hi-z (compulsory off). refer to ?the explanation of outpwm control? for detail. bit0 : out1md outcnt external control setting ?0? : outcnt invalid, out1 output depends on output control by out1en. ?1? : out1 output depends on output control by out1en with outcnt=h. with outcnt=l, out1=hi-z (compulsory off). refer to ?the explanation of outpwm control? for detail.
technical note 27/51 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD6088GUL address 1ch < out key output level setting > address r/w bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 1ch w/r - - - kben out4en out3en out2en out1en initial value 00h - - - 0 0 0 0 0 bit [7:5] : (not used) bit4 : kben kblt output level setting (non-alc mode) ?0? : kblt l
technical note 28/51 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD6088GUL address 1dh < out key output mode setting > address r/w bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 1dh w fpwm - - - kbslp (1) kbslp (0) outslp(1) outslp(0) initial value 00h 0 - - - 0 0 0 0 bit7 : fpwm key driver, out1 ?
technical note 29/51 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD6088GUL ? ? ? ? ? ? ? vio vbat resetb viodet digital pin level shift i/o r detout p ut inside reset vio vbat resetb det output inside reset 2.6v (typ)1.0v reset by viodet when the vio voltage becomes more than typ1.0v(vth of nmos in the ic), viodet is removed. on the contrary, when vio is as follows 1.0v, it takes reset.(the vbat voltage being a prescribed movement range)
technical note 30/51 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD6088GUL
technical note 31/51 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD6088GUL mode transition the transition of boosts multiple transits automatically by vbat voltage and the vout pin voltage. the mode transition of the charge pump works as follows. ? ?
technical note 32/51 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD6088GUL
technical note 33/51 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD6088GUL ? ? ? ? ? adc average logarithmic conv. ambient level current conversion slope process sbias gain control usually on / intermittent sensor offset correction conversion slope timer gain control on/off ambient level lcd backlight ssens sbias gc1 gc2 lin/log led* sensor sensor gain correction data correction : effective also in alc functional the case of not using it wpwmin mode select pwm enabling dc current setup threshold 2 value decision hysteresis vbat ?? kbl t key backlight slope timer pwm process pwm cycle pwm polarity switching mode select main group setup (1) auto luminous control on/off ? ? ?
technical note 34/51 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD6088GUL (2) i/v conversion ? ?
technical note 35/51 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD6088GUL (3) gain control ? ? ? ? ssens sbias gc1 gc2 sgnd iout gc1 gc2 gnd vcc bh1600 ssens sbias gc1 gc2 sgnd a mbient ssens voltage low gain mode high gain mode a mbient ssens voltage a uto gain mode
technical note 36/51 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD6088GUL (4) a/d conversion ? ? ? ? ? ? ? a dc cycle sbias output a dc movement a lcen a mb(3:0) t ad= 16.4ms(typ) a mb(3:0) a dcyc(1:0) t wait= 64ms(typ) when sbiason=1 gc1, gc2 gc1, gc2=00 t oprt= 80.4ms(typ) ad start signal t adone= 1.024ms(typ) 16 times measurement (wait time) (a/d conversion time) (operate time) 16 times a mbient ssens voltage a mbient ssens voltage gain adjustment sgain(3:0) a mbient ssens voltage a mbient ssens voltage a mbient ssens voltage a mbient ssens voltage offset adjustment sofs(3:0)
technical note 37/51 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD6088GUL (6) average filter ? ? ? ? ? ? ? ? ? ? : this means that this zone is not outputted in this mode.
technical note 38/51 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD6088GUL (8) led current assignment ? ? ? ? ? ? level
technical note 39/51 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD6088GUL (10) led current reset when mode change ? ? ? ? en(*) dc/dc output wpwmin input wpwmen led current inte rna l s o ft-sta rt t im e e n (*) : it m e a ns ?m l e d e n ? or ?w *e n ?. it is poss ib le to m ak e it a w p w m in inp ut a nd w p w m e n = 1 in fro nt of e n (*). a pw m drive becom es effective after the tim e of an led current standup. w hen rising during pw m operation, as for the standup tim e of a dc/dc output, only the rate of pw m duty becom es late. appearance m ay be influenced when extrem ely late frequency and extrem ely low d uty are inputted. please secure 80
technical note 40/51 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD6088GUL (12) key back light 2-value decision ? ? ? ? ? ? ? ? ? level key back light on/offcontrol 0 10 20 30 40 50 60 70 80 90 100 0 5 10 15 20 25 30 the number of st ep' s duty ratio (%)
technical note 41/51 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD6088GUL t= time per 1step ??????
technical note 42/51 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD6088GUL ? ? ? ?
technical note 43/51 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD6088GUL
technical note 44/51 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD6088GUL ? t= tim e per 1step32 ste p d uty=1.56%(at the time of step 1) fpwm out* 0 1 expansion 31 30 ?????? 0 10 20 30 40 50 60 70 80 90 100 0 5 10 15 20 25 30 the number of st ep' s duty ratio (%)
technical note 45/51 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD6088GUL
technical note 46/51 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD6088GUL
technical note 47/51 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD6088GUL 3. backlight: un-auto luminous mode mleden vout led current t soft the rise time depends on tlh(3:0) setting
technical note 48/51 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD6088GUL
technical note 49/51 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD6088GUL
technical note 50/51 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD6088GUL 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 ta power dissipation pd w)
technical note 51/51 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD6088GUL (unit : mm) vcsp50l3 (BD6088GUL) s 0.06 s a b ba 0.05 123456 a b c d f e ( 0.15)index post 0.55max 0.1 0.05 0.50 0.05 1pin mark 3.50 0.05 3.50 0.05 0.50 0.05 p=0.50 5 p=0.50 5 36- 0.25 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 2500pcs 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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