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1/28 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. led drivers for lcd backlights multifunction backlight led drivers for small lcd panels (charge pump type) BD6085GUL description BD6085GUL is multi-function led driver that is the most suitable for the cellular phone. it has many functions that are needed to "the upper side" of the cellular phone. features 1) total 7leds driver for lcd backlight (main/sub) and led flash it can set maximum 30ma by 32 steps (current dac) for main/sub display it can set maximum 360ma for flash led driver (it has 3 channels led driver at maximum 120ma/ch for flash.) the number of lighting for main/sub/flas h led can be set up grouping by register. ex. ) 4leds / 0led / 3leds 4leds / 1led / 2leds 4leds / 2leds / 1led 4leds / 1led / 1led 5leds / 1led / 1led 5leds / 0led / 2leds 6leds / 0led / 1led it can use the 1led flash module to 3led flash module. normal mode = maximum 30ma/ch, flash mode = x4 normal mode (for 3ch led). the grouping of led is independently controlled by register. 2) 4ch series regulator (ldo) it has selectable output voltage by the register. ldo1,ldo2 : iomax=200ma ldo3,ldo4 : iomax=150ma 3) charge pump dc/dc for led driver it has x1/x1.33/x1.5/x2 mode t hat will be selected automatically. soft start functions over voltage protection (auto-return type) over current protection (auto-return type) 4) thermal shutdown (auto-return type) 5) i 2 c bus fs mode(max 400khz)write/read 6) vcsp50l3(3.30mm 3.30mm, 0.55mm) small a nd thin csp package *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 ma ximum ratings (ta=25 ) parameter symbol ratings unit maximum voltage vmax 7 v power dissipation pd 1325 mw operating temperature range topr -35 ~ +85 storage temperature range tstg -55 ~ +150 note)power dissipation deleting is 10.6mw/ , when it?s used in over 25 . (it?s deleting is on the board that is rohm?s standard) operating conditions (vbat vio, ta=-35~85 ) parameter symbol ratings unit vbat input voltage vbat 2.7~5.5 v vio pin voltage vio 1.65~3.3 v no.11040eat28
technical note 2/28 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD6085GUL
technical note 3/28 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD6085GUL ? ?
technical note 4/28 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD6085GUL ? ?
technical note 5/28 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD6085GUL c2p c1p led1~4 charge pump vbatcp i/o i 2 c interface c1n led5 led6 led7 iref tsd back light x1 / x1.33 / x1.5 / x2 charge pump mode control vout ovp c2n led terminal voltage feedback 2.2
technical note 6/28 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD6085GUL fig.2 block diagram / application circuit example 2 back light (6ch) + flash (max 120ma) vbatldo1 vbatldo2 c2p c1p led1~6 charge pump i/o i 2 c interface c1n led7 iref tsd back light main only or main + sub x1 / x1.33 / x1.5 / x2 charge pump mode control vout ovp c2n led terminal voltage feedback 2.2
technical note 7/28 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD6085GUL
technical note 8/28 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD6085GUL package vcsp50l3 size : 3.30mm 3.30mm a ball pitch : 0.5mm height : 0.55mm max bd6085 lot no.
technical note 9/28 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD6085GUL pin functions no ball no. pin name i/o esd diode functions equivalent circuit for power for ground 1 b6 vbatcp - - gnd power supply for charge pump a 2 f3 vbat1 - - gnd power supply a 3 e3 vbat2 - - gnd power supply a 4 f5 vbatldo1 - - gnd power supply for ldo a 5 f2 vbatldo2 - - gnd power supply for ldo a 6 a1 t1 i vbat gnd test input pin (short to ground) s 7 a6 t2 i vbat gnd test input pin (short to ground) s 8 f6 t3 o vbat gnd test output pin (open) m 9 f1 t4 o vbat gnd test output pin (open) n 10 e6 vio - vbat gnd powe r supply for i/o and digital c 11 d3 resetb i vbat gnd reset in put (l: reset, h: reset cancel) h 12 d5 sda i/o vbat gnd i 2 c data input / output i 13 d4 scl i vbat gnd i 2 c clock input h 14 c4 cpgnd - vbat - ground b 15 f4 agnd - vbat - ground b 16 b2 wgnd - vbat - ground b 17 c2 flgnd - vbat - ground b 18 d6 c1n i/o vbat gnd charge pump capacitor is connected f 19 c6 c1p i/o - gnd charge pump capacitor is connected g 20 c5 c2n i/o vbat gnd charge pump capacitor is connected f 21 b5 c2p i/o - gnd charge pump capacitor is connected g 22 a4 c3n i/o vbat gnd charge pump capacitor is connected f 23 a5 c3p i/o - gnd charge pump capacitor is connected g 24 b4 vout o - gnd charge pump output pin a 25 e5 ldo1o o vbat gnd ldo1 output pin q 26 e1 ldo2o o vbat gnd ldo2 output pin q 27 e4 ldo3o o vbat gnd ldo3 output pin q 28 e2 ldo4o o vbat gnd ldo4 output pin q 29 a3 led1 i - gnd led cathode connection 1 (for back light) e 30 b3 led2 i - gnd led cathode connection 2 (for back light) e 31 a2 led3 i - gnd led cathode connection 3 (for back light) e 32 b1 led4 i - gnd led cathode connection 4 (for back light) e 33 c1 led5 i - gnd led cathode connection 5 (for back light or flash) e 34 d1 led6 i - gnd led cathode connection 6 (for back light or flash) e 35 d2 led7 i - gnd led cathode connection 7 (for back light or flash) e the led terminal that isn't used is to short-circuit to the ground. but, the set up of a register concerned with led that isn't used is prohibited. total: 35pin
technical note 10/28 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD6085GUL equivalent circuit vbat c a vbat b e vbat d vbat f g vio vbat h vio vbat i vio vbat j vbat vbat l vbat vbat m vbat n vbat vbat q vbat vbat p vio vio k vbat o vbat vbat r vbat vbat s vio vbat t
technical note 11/28 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD6085GUL i 2 c bus format the writing/reading operation is based on the i 2 c slave standard. ? slave address a7 a6 a5 a4 a3 a2 a1 r/w 1 1 1 0 1 1 0 1/0 ? bit transfer scl transfers 1-bit data during h. scl cannot change signal of sda during h at the time of bit transfer. if sda changes while scl is h, start conditions or stop conditions will occur and it will be interpreted as a control signal. sda scl sda a state of stability data are effective sda it can change ? start and stop condition when sda and scl are h, data is not transferred on the i 2 c- bus. this condition indicates, if sda changes from h to l while scl has been h, it will become start (s) conditions, and an access start, if sda changes from l to h while scl has been h, it will become stop (p) conditions and an access end. sda scl s p start condition stop condition ? acknowledge it transfers data 8 bits each after the occurrence of start condition. a transmitter opens sda after transfer 8bits data, and a receiver returns the acknowledge signal by setting sda to l. 12 89 data output by transmitter data output by receiver acknowledge not acknowledge s start condition clock pulse for acknowledgement scl
technical note 12/28 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD6085GUL ? writing protocol a register address is transferred by the next 1 byte that transferred the slave address and the write-in command. the 3rd byte writes data in the internal register written in by the 2nd byte, and after 4th byte or, the increment of register address is carried out automatically. however, when a register address turns into the last address, it is set to 00h by the next transmission. after the transmission end, the increment of the address is carried out. s a a a p register address slave address from master to slave from slave to master r/w=0(write) data a d7 d6 d5 d4 d3 d2 d1 d0 d7 d6 d5 d4 d3 d2 d1 d0 a 7 a 6 a 5 a 4 a 3 a 2 a 1 a 0 0 x x x x x x x *1 *1 data a =acknowledge(sd a low) a =not acknowledge(sda high) s=start condition p=stop condition *1: write timing register address increment register address increment ? reading protocol it reads from the next byte after writing a slave address and r/w bit. the register to read considers as the following address accessed at the end, and the data of the address that carried out the increment is read after it. if an address turns into the last address, the next byte will read out 00h. after the transmission end, the increment of the address is carried out. 1 s a p from master to slave from slave to master r/w=1(read) data a data slave address d7 d6 d5 d4 d3 d2 d1 d0 d7 d6 d5 d4 d3 d2 d1 d0 register address increment x x x x x x x a =acknowledge(sd a low) a =not acknowledge(sda high) s=start condition p=stop condition register address increment a ? multiple reading protocols after specifying an internal address, it reads by repeated start condition and changing the data transfer direction. the data of the address that carried out the increment is read after it. if an address turns into the last address, the next byte w ill read out 00h. after the transmission end, the increment of the address is carried out. r/w=0(write) r/w=1(read) slave address register address slave address data data s a a a sr 1 0 a 7 a 6 a 5 a 4 a 3 a 2 a 1 a 0 x x x x x x x x x x x x x x a =acknowledge(sd a low) a =not acknowledge(sda high) s=start condition p=stop condition from master to slave from slave to master register address increment register address increment p a d7 d6 d5 d4 d3d2 d1d0 d7d6 d5d4d3d2d1d0 a sr=repeated start condition as for reading protocol and multiple reading protocols, please do a(not acknowledge) after doing the final reading operation. it stops with read when ending by a(acknowledge), and sda stops in the state of low when the reading data of that time is 0. however, this state returns usually when scl is moved, data is read, and a(not acknowledge) is done.
technical note 13/28 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD6085GUL timing diagram sda s cl t su;dat t low s sr p s t buf t hd;sta t su;sta t high t hd;sta t hd;dat t su;sto electrical characteristics(unless otherwise specified, ta=25 , vbat=3.6v, vio=1.8v) parameter symbol standard-mode fast-mode unit min. typ. max. min. typ. max. i 2 c bus format scl clock frequency f scl 0 - 100 0 - 400 khz low period of the scl clock t low 4.7 - - 1.3 - - s high period of the scl clock t high 4.0 - - 0.6 - - s hold time (repeated) start condition after this period, the first clock is generated t hd;sta 4.0 - - 0.6 - - s set-up time for a repeated start condition t su;sta 4.7 - - 0.6 - - s data hold time t hd;dat 0 - 3.45 0 - 0.9 s data set-up time t su;dat 250 - - 100 - - ns set-up time for stop condition t su;sto 4.0 - - 0.6 - - s bus free time between a stop and start condition t buf 4.7 - - 1.3 - - s
technical note 14/28 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD6085GUL register list address register data function d7 d6 d5 d4 d3 d2 d1 d0 00h - grpset2 grpset1 grpset0 - - - sftrst software reset led lighting group setting 01h - ldo4en ldo3en ldo2en ldo1en flleden sleden mleden enable control 02h - - - imled4 imled3 imled2 imled1 imled0 main led current setting 03h - - - isled4 isled3 isled2 isled1 isled0 sub led current setting 04h - - flashen iflled4 iflled 3 iflled2 iflled1 iflled0 flash led current setting flash mode setting 05h ldo2vsel3 ldo2vsel2 ldo2vsel1 ldo2vsel0 ldo1vsel3 ldo1vsel2 ldo1vsel1 ldo1vsel0 ldo1 vout control ldo2 vout control 06h ldo4vsel3 ldo4vsel2 ldo4vsel1 ldo4vsel0 ldo3vsel3 ldo3vsel2 ldo3vsel1 ldo3vsel0 ldo3 vout control ldo4 vout control input "0? for "-". prohibit to accessing the address that isn?t mentioned. register map address 00h < software reset, led lighting group setting > address r/w bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 00h r/w - grpset2 grpset1 grpset0 - - - sftrst initial value 00h - 0 0 0 - - - 0 bit7 : (not used) bit [6:4] : grpset [2:0] (main group) (sub group) (flash group) ?000? : led1~4 --- led5~7 ?001? : led1~4 led5 led6~7 ?010? : led1~4 led5~6 led7 ?011? : led1~4 led5 led7 ?100? : led1~5 led6 led7 ?101? : led1~5 --- led6~7 ?110? : led1~6 --- led7 ?111? : led1~6 --- led7 bit [3:1] : (not used) bit0 : sftrst ?0? : reset cancel ?1? : reset (all register initializing)
technical note 15/28 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD6085GUL address 01h < enable control > address r/w bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 01h r/w - ldo4en ldo3en ldo2en ldo1en flleden sleden mleden initial value 00h - 0 0 0 0 0 0 0 bit7 : (not used) bit6 : ldo4en ?0? : ldo4 off ?1? : ldo4 on bit5 : ldo3en ?0? : ldo3 off ?1? : ldo3 on bit4 : ldo2en ?0? : ldo2 off ?1? : ldo2 on bit3 : ldo1en ?0? : ldo1 off ?1? : ldo1 on bit2 : flleden ?0? : flash led off ?1? : flash led on bit1 : sleden ?0? : sub led off ?1? : sub led on bit0 : mleden ?0? : main led off ?1? : main led on
technical note 16/28 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD6085GUL address 02h < main led current setting > address r/w bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 02h r/w - - - imled4 imled3 imled2 imled1 imled0 initial value 00h - - - 0 0 0 0 0 bit[7:5] : (not used) bit[4:0] : imled [4:0] ?00000? : 0.9375 ma (initial value) ?00001? : 1.875 ma ?00010? : 2.8125 ma ?00011? : 3.75 ma ?00100? : 4.6875 ma ?00101? : 5.625 ma ?00110? : 6.5625 ma ?00111? : 7.5 ma ?01000? : 8.4375 ma ?01001? : 9.375 ma ?01010? : 10.3125 ma ?01011? : 11.25 ma ?01100? : 12.1875 ma ?01101? : 13.125 ma ?01110? : 14.0625 ma ?01111? : 15 ma ?10000? : 15.9375 ma ?10001? : 16.875 ma ?10010? : 17.8125 ma ?10011? : 18.75 ma ?10100? : 19.6875 ma ?10101? : 20.625 ma ?10110? : 21.5625 ma ?10111? : 22.5 ma ?11000? : 23.4375 ma ?11001? : 24.375 ma ?11010? : 25.3125 ma ?11011? : 26.25 ma ?11100? : 27.1875 ma ?11101? : 28.125 ma ?11110? : 29.0 625 ma ?11111? : 30 ma * led current : 30 x 1/32 ma step
technical note 17/28 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD6085GUL address 03h < sub led current setting > address r/w bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 03h r/w - - - isled4 isled3 isled2 isled1 isled0 initial value 00h - - - 0 0 0 0 0 bit[7:5] : (not used) bit[4:0] : isled [4:0] ?00000? : 0.9375 ma (initial value) ?00001? : 1.875 ma ?00010? : 2.8125 ma ?00011? : 3.75 ma ?00100? : 4.6875 ma ?00101? : 5.625 ma ?00110? : 6.5625 ma ?00111? : 7.5 ma ?01000? : 8.4375 ma ?01001? : 9.375 ma ?01010? : 10.3125 ma ?01011? : 11.25 ma ?01100? : 12.1875 ma ?01101? : 13.125 ma ?01110? : 14.0625 ma ?01111? : 15 ma ?10000? : 15.9375 ma ?10001? : 16.875 ma ?10010? : 17.8125 ma ?10011? : 18.75 ma ?10100? : 19.6875 ma ?10101? : 20.625 ma ?10110? : 21.5625 ma ?10111? : 22.5 ma ?11000? : 23.4375 ma ?11001? : 24.375 ma ?11010? : 25.3125 ma ?11011? : 26.25 ma ?11100? : 27.1875 ma ?11101? : 28.125 ma ?11110? : 29.0 625 ma ?11111? : 30 ma * led current : 30 x 1/32 ma step
technical note 18/28 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD6085GUL address 04h < flash led current setting, flash mode setting > address r/w bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 04h r/w - - flashen iflled4 iflled3 iflled2 iflled1 iflled0 initial value 00h - - 0 0 0 0 0 0 bit[7:6] : (not used) bit5 : flashen ?0? : flash mode off ?1? : flash mode on (x4 normal mode) bit[4:0] : iflled [4:0] (at flashen=0) (at flashen=1) ?00000? : 0.9375 ma, 3.75 ma (initial value) ?00001? : 1.875 ma, 7.5 ma ?00010? : 2.8125 ma, 11.25 ma ?00011? : 3.75 ma, 15 ma ?00100? : 4.6875 ma, 18.75 ma ?00101? : 5.625 ma, 22.5 ma ?00110? : 6.5625 ma, 26.25 ma ?00111? : 7.5 ma, 30 ma ?01000? : 8.4375 ma, 33.75 ma ?01001? : 9.375 ma, 37.5 ma ?01010? : 10.3125 ma, 41.25 ma ?01011? : 11.25 ma, 45 ma ?01100? : 12.1875 ma, 48.75 ma ?01101? : 13.125 ma, 52.5 ma ?01110? : 14.0625 ma, 56.25 ma ?01111? : 15 ma, 60 ma ?10000? : 15.9375 ma, 63.75 ma ?10001? : 16.875 ma, 67.5 ma ?10010? : 17.8125 ma, 71.25 ma ?10011? : 18.75 ma, 75 ma ?10100? : 19.6875 ma, 78.75 ma ?10101? : 20.625 ma, 82.5 ma ?10110? : 21.5625 ma, 86.25 ma ?10111? : 22.5 ma, 90 ma ?11000? : 23.4375 ma, 93.75 ma ?11001? : 24.375 ma, 97.5 ma ?11010? : 25.3125 ma, 101.25 ma ?11011? : 26.25 ma, 105 ma ?11100? : 27.1875 ma. 108.75 ma ?11101? : 28.125 ma, 112.5 ma ?11110? : 29.0 625 ma, 116.25 ma ?11111? : 30 ma, 120 ma * led current : 30 x 1/32 ma step (at flashen=0), 120 x 1/32 ma step (at flashen=1)
technical note 19/28 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD6085GUL address 05h < ldo1 vout control, ldo2 vout control > address r/w bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 05h r/w ldo2vsel3 ldo2vsel2 ldo2vsel1 ldo2vsel0 ldo1vsel3 ldo1vsel2 ldo1vsel1 ldo1vsel0 initial value 74h 0 1 1 1 0 1 0 0 bit[7:4] : ldo2vsel [3:0] ?0000? : 1.20 v ?0001? : 1.30 v ?0010? : 1.50 v ?0011? : 1.60 v ?0100? : 1.80 v ?0101? : 2.20 v ?0110? : 2.40 v ?0111? : 2.50 v (initial value) ?1000? : 2.60 v ?1001? : 2.70 v ?1010? : 2.80 v ?1011? : 2.90 v ?1100? : 3.00 v ?1101? : 3.10 v ?1110? : 3.20 v ?1111? : 3.30 v bit[3:0] : ldo1vsel [3:0] ?0000? : 1.20 v ?0001? : 1.30 v ?0010? : 1.50 v ?0011? : 1.60 v ?0100? : 1.80 v (initial value) ?0101? : 2.20 v ?0110? : 2.40 v ?0111? : 2.50 v ?1000? : 2.60 v ?1001? : 2.70 v ?1010? : 2.80 v ?1011? : 2.90 v ?1100? : 3.00 v ?1101? : 3.10 v ?1110? : 3.20 v ?1111? : 3.30 v
technical note 20/28 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD6085GUL address 06h < ldo3 vout control, ldo4 vout control > address r/w bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 06h r/w ldo4vsel3 ldo4vsel2 ldo4vsel1 ldo4vsel0 ldo3vsel3 ldo3vsel2 ldo3vsel1 ldo3vsel0 initial value a4h 1 0 1 0 0 1 0 0 bit[7:4] : ldo4vsel [3:0] ?0000? : 1.20 v ?0001? : 1.30 v ?0010? : 1.50 v ?0011? : 1.60 v ?0100? : 1.80 v ?0101? : 2.20 v ?0110? : 2.40 v ?0111? : 2.50 v ?1000? : 2.60 v ?1001? : 2.70 v ?1010? : 2.80 v (initial value) ?1011? : 2.90 v ?1100? : 3.00 v ?1101? : 3.10 v ?1110? : 3.20 v ?1111? : 3.30 v bit[3:0] : ldo3vsel [3:0] ?0000? : 1.20 v ?0001? : 1.30 v ?0010? : 1.50 v ?0011? : 1.60 v ?0100? : 1.80 v (initial value) ?0101? : 2.20 v ?0110? : 2.40 v ?0111? : 2.50 v ?1000? : 2.60 v ?1001? : 2.70 v ?1010? : 2.80 v ?1011? : 2.90 v ?1100? : 3.00 v ?1101? : 3.10 v ?1110? : 3.20 v ?1111? : 3.30 v
technical note 21/28 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD6085GUL explanation for operate 1. reset there are two kinds of reset, software reset and hardware reset. (1) software reset ? all the registers are initialized more than making a register (sftrst) setup "1". ? the register of software resetting is an automatic return (auto return 0). (2) hardware reset ? it shifts to hardware reset by changing resetb pin ?h? ?l?. ? the condition of all the registers under hardware reset pin is returned to the initial value, and it stops accepting all address. ? it?s possible to release from a state of hardware reset by changing resetb pin ?l? ?h?. ? resetb pin has delay circuit. it doesn?t recognize as hardware reset in ?l? period under 5 s. (3) reset sequence ? when hardware reset was done dur ing software reset, software reset is canceled when hardware reset is canceled. (because the initial value of software reset is ?0?) 2. thermal shutdown the blocks which thermal shutdown func tion is effective in the following. charge pump led driver ldo1, ldo2, ldo3, ldo4 a thermal shutdown function works in about 190 . detection temperature has a hysteresis, and detection release temperature is about 170 . (design reference value) 3. charge pump for led driver charge pump block is designed for the power supply for led driver. it has the x1.0/x1.33/x1.5/x2.0 mode. it changes to the most suitable mode automatically by vf of led and the battery voltage. it has the mode of x1.33 and it can be higher efficiency than traditional. start charge pump circuit operates when any led turns on. soft start when the start of the charge pump circuit is done, it has the soft start function to prevent a rush current. en (*1) v io vout resetb v bat t vbaton t vbatoff t vioon=min 0.1ms t rstb=min 0.1ms t soft led current t rst=min 0ms t viooff=min 1ms (*1) an en signal in the upper figure means the following; ?en is high? = any led turns on but if ta >tsd, en signal doesn?t become effective.
technical note 22/28 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD6085GUL charge pump mode transition the transition of boost multiple transits automatically by vf of led and the battery voltage. BD6085GUL changes the four charge pump movement m ode automatically to realize low consumption power. < mode up > a led terminal voltage is monitored, and the movement mode is changed to 1 1.33, 1.33 1.5 and 1.5 2 automatically when a led terminal voltage is lower than 0.2v (typ). at this time, the maximum output voltage of the charge pump is restricted to 5.1v (typ). < mode down > the rise in the battery voltage, the off control of led lighting and the data writing to the address 02h,03h,04h (led current setting) is monitored, and t he movement mode is changed to 2 1.5 1.33 1 automatically at flashen (address 04h) =?0?. this mode down movement lasts until a mode up movement happens. at flashen=?1?, the mode down doesn't happen. the thresholds of rise in a battery voltage are 2.9v, 3.3v, 3.7v and 4.1v (typ). and, as for the off control of led lighting, it is shown that mleden, sleden and flleden (address 01h) and flashen (address 04h) transited in ?1? ?0?. over voltage protection / over current protection charge pump circuit output (vout) is equipped with the over-voltage protection and the over current protection function. a vout over-voltage detection voltage is about 5.5v(typ). (vout at the time of rise in a voltage) a detection voltage has a hysteresis, and a detection release voltage is about 5.1v(typ). and, when vout output short to ground, input current of the battery terminal is limited by an over current protection function. standby soft all off any led on ta 2.3v(typ) cp x1.0 mode after ?vout>1.5v(typ)? detected, 142us(typ) wait x1.0 cp x1.0 mode mode up=?h? mode down=?h? x1.33 cp x1.33 mode mode up=?h? mode down=?h? x1.5 cp x1.5mode 1 mode up=?h? mode down=?h? x2.0 cp x2.0mode all led off reset
technical note 23/28 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD6085GUL 4. led driver led current value setting (for main/sub) internal circuit fixes maximum current value of led. led current is maximum 30ma/ch. led current value setting (for flash) internal circuit fixes maximum current value of led. when flashen (address 04h)=0, led current is maximum 30ma/ch. (normal mode) when flashen (address 04h)=1, led current change to x4 of normal mode. (flash mode) at normal mode, it can use for lcd backlight or torch mode of flash. at flash mode, it can use for led flash. the number of led lighting the number of lighting for main/sub/flash led can be set up grouping by the register grpset* (address 00h). the setting of the number of lighting is as the following. the grouping of led (main/sub/flash) is independent ly controlled by register mleden, sleden, flleden (address 01h). grouping setting led1 led2 led3 led4 led5 led6 led7 main/sub/flash (0,0,0) main main main main flash flash flash 4 / 0 / 3 (0,0,1) main main main main sub flash flash 4 / 1 / 2 (0,1,0) main main main main sub sub flash 4 / 2 / 1 (0,1,1) main main main main sub - flash 4 / 1 / 1 (1,0,0) main main main main main sub flash 5 / 1 / 1 (1,0,1) main main main main main flash flash 5 / 0 / 2 (1,1,0) main main main main main main flash 6 / 0 / 1 (1,1,1) main main main main main main flash 6 / 0 / 1 grouping setting (*,*,*) means (?grpset2?,?grpset1?,?grpset0?). the change of the grouping setting with turning it on is prohibited. the led terminal that isn?t used must be connected to the ground. normal mode/flash mode normal mode and flash mode change as the figure of the follow. iled is set by the register. flashen led current 4iled iled flleden normal mode flash mode normal mode
technical note 24/28 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD6085GUL 5. i/o when the resetb pin is low, the input buffers (sda and scl) are disable for the low consumption power. level shift vbat scl (sda) resetb logic vio en resetb=l, output ?h? 6. about the start of ldo1~ldo4 it must start as follows. vbat on (enough rise up) vio on (enough rise up) reset release ldo on (register access acceptable) ldo off reset vio off (enough fall down) vbat off 7. about the terminal management of the function that isn't used set up the terminal that isn't used as follows. the led terminal which isn't used : short to ground don't do the control concerned with this terminal. t1, t2 : short to ground t3, t4 : open ldo1en or ldo2en or ldo3en or ldo4en v io resetb v bat t vbaton t vbatoff t vioon=min 0.1ms t rstb=min 0.1ms ldo1o or ldo2o or ldo3o or ldo4o (ldo output) t rst=min 0ms t viooff=min 1ms t rise = max 1ms
technical note 25/28 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD6085GUL pcb pattern of the power dissipation measuring board 1 st layer(component) 2 nd layer 3 rd layer 4 th layer 5 th layer 6 th layer 7 th layer 8 th layer(solder)
technical note 26/28 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD6085GUL cautions on use (1) absolute ma ximum ratings an excess in the absolute maximum ratings, such as supply voltage, temperature range of operating conditions, etc., can break down devices, thus making impossible to identify breaking mode such as a short circuit or an open circuit. if any special mode exceeding the absolute maximum ratings is assumed, consideration should be given to take physical safety measures including the use of fuses, etc. (2) power supply and ground line design pcb pattern to provide low impedance for the wiring between the power supply and the ground lines. pay attention to the interference by common impedance of layout pattern when there are plural power supplies and ground lines. especially, when there are ground pattern for small signal and ground pattern for large current included the external circuits, please separate each ground pattern. furthermore, for all power supply pins to ics, mount a capacitor between the power supply and the ground pin. at the same time, in order to use a capacitor, thoroughly check to be sure the characteristics of the capacitor to be used present no problem including the occurrence of capacity dropout at a low temperature, thus determining the constant. (3) ground voltage make setting of the potential of the ground pin so that it will be maintained at the minimum in any operating state. furthermore, check to be sure no pins are at a potential lower than the ground voltage including an actual electric transient. (4) short circuit between pins and erroneous mounting in order to mount ics on a set pcb, pay thorough attention to the direction and offset of the ics. erroneous mounting can break down the ics. furthermore, if a short circuit o ccurs due to foreign matters entering between pins or between the pin and the power supply or the ground pin, the ics can break down. (5) operation in strong electromagnetic field be noted that using ics in the strong electromagnetic field can malfunction them. (6) input pins in terms of the construction of ic, parasitic elements are inevitably formed in relation to potential. the operation of the parasitic element can cause interference with circuit operation, thus resulting in a malfunction and then breakdown of the input pin. therefore, pay thorough attention not to handle the input pins, such as to apply to the input pins a voltage lower than the ground respectively, so that any parasitic element will operate. furthermore, do not apply a voltage to the input pins when no power supply voltage is applied to the ic. in addition, even if the power supply voltage is applied, apply to the input pins a voltage lower than the power supply voltage or within the guaranteed value of electrical characteristics. (7) external capacitor in order to use a ceramic capacitor as the external capaci tor, determine the constant with consideration given to a degradation in the nominal capacitance due to dc bias and changes in the capacitance due to temperature, etc. (8) thermal shutdown circuit (tsd) this lsi builds in a thermal shutdown (tsd)circuit. when junction temperatures become detection temperature or higher, the thermal shutdown circuit operates and turns a switch off. the thermal shutdown circuit, which is aimed at isolating the lsi from thermal runaway as much as possibl e, is not aimed at the protection or guarantee of the lsi. therefore, do not continuously use the lsi with this circuit operating or use the lsi assuming its operation. (9) thermal design perform thermal design in which there are adequate margins by taking into account the permissible dissipation (pd)in actual states of use. (10) ldo use each output of ldo by the independence. don?t use under the condition that each output is short-circuited because it has the possibility that an operation becomes unstable. (11) about the pin for the test, the un-use pin prevent a problem from being in the pin for the test and the un-use pin under the state of actual use. please refer to a function manual and an application notebook. and, as for the pin that doesn't specially have an explanation, ask our company person in charge. (12) about the rush current 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 capacitance, power wiring, width of ground wiring, and routing of wiring. (13) about the function description or application note or more. the function description and the application notebook are the design materials to design a set. so, the contents of the materials aren't always guaranteed. please design applicat ion by having fully examination and evaluation include the external elements.
technical note 27/28 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD6085GUL power dissipation (on the rohm?s standard board) 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 0 25 50 75 100 125 150 ta power dissipation pd w) 1325mw information of the rohm?s standard board material : glass-epoxy size : refer to after page.
technical note 28/28 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. BD6085GUL ordering part number b d 6 0 8 5 gu l - e 2 part no. part no. 6085 package gul : vcsp50l3 packaging and forming specification e2: embossed tape and reel (unit : mm) vcsp50l3 (BD6085GUL) s 0.08 s a b ba 0.05 123456 a b c d f e ( 0.15)index post 0.55max 0.1 0.05 0.4 0.1 1pin mark 3.3 0.1 3.3 0.1 0.4 0.1 p=0.5 5 p=0.5 5 35- 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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