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1/15 www.rohm.com 2011.05 - rev.b ? 2011 rohm co., ltd. all rights reserved. system led drivers for mobile phones chopper type for flash BD6062GU description the BD6062GU is 1a flash led driver ics that can drive 1led. it is possible to select how to control, 2wired control mode (direct control mode) or 3wired mode (register control mode ). the BD6062GU has original timer function in 3wired mode and easily set pre-flash timer and flash timer. features 1) 400ma ~ 800ma selectable in flash mode (register control mode) 2) 50 ~ 200ma torch mode (register control mode) 3) 800ma in flash mode (direct control mode) 4) 200ma in torch mode (direct control mode) 5) maximum current of led is 1a in both flash and torch mode 6) 3wired mode and direct control mode selectable 7) in 3wired mode, pre-flash timer and flash timer controllable 8) in 3wired mode, flash current and torch current is controllable 9) over voltage protection 10) csp 23pin small and thin package applications flash and torch of camera for mobile phone line up matrix parameter BD6062GU input voltage 2.7 ~ 5.5v switching frequency 480 ~ 720khz maximum led current 1a package vcsp85h2 absolute maximum ratings (ta=25 ) parameter symbol ratings unit condition maximum applied voltage vmax 7 v vbat, vio power dissipation pd 1100 * 1 mw operating temperature range topr -30~+85 storage temperature range tstg -55~+150 *1 50mm 58mm 1.75mm at glass epoxy board moun ting. when it?s used by more than ta=25 , it?s reduced by 11mw/ recommended operating range (ta= -30 ~ +85 ) parameter symbol ratings unit condition min. typ. max. power supply voltage vdd 2.7 3.6 5.5 v * 2 io supply voltage vio 1.62 1.8 3.3 v * 2 *2 vbat vio no.11041ebt13
technical note 2/15 www.rohm.com 2011.05 - rev.b ? 2011 rohm co., ltd. all rights reserved. BD6062GU ?
technical note 3/15 www.rohm.com 2011.05 - rev.b ? 2011 rohm co., ltd. all rights reserved. BD6062GU
technical note 4/15 www.rohm.com 2011.05 - rev.b ? 2011 rohm co., ltd. all rights reserved. BD6062GU ?
technical note 5/15 www.rohm.com 2011.05 - rev.b ? 2011 rohm co., ltd. all rights reserved. BD6062GU 4.7h sw2 sw1 battery (6.3v) 47 f (6.3v) sbd vbat gnd 2.2f pgnd1 vfb rflash tfb ovp gndsens pgnd2 ffb rtorch ovp open q s q r curdrv torch curdrv flash osc slope control ifmode flash (rstb) test torch (cs) csdi clk vio 1 ? ? 4.7h sw2 sw1 battery (6.3v) 47 f (6.3v) sbd vbat gnd 2.2f pgnd1 vfb rflash tfb ovp gndsens pgnd2 ffb rtorch ovp open q s q r curdrv torch curdrv flash osc slope control ifmode rstb (flash) vio 1 ? ? vbat gnd clk pgnd2 pgnd1 ovp rtorch vfb tfb csdi vio sw2 sw1 ifmode rflash test rstb/ flash ftb gnd sens 5 4 3 2 1 a b c d e n.c. n.c. n.c. cs/ torch fig.27 pin location diagram (top view) 4.7h sw2 sw1 battery (6.3v) 22 f (6.3v) sbd vbat gnd 4.7f pgnd1 vfb rflash tfb ovp gndsens pgnd2 ffb rtorch ovp open q s q r curdrv torch curdrv flash osc slope control ifmode flash (rstb) vio 2 ? ? 4.7h sw2 sw1 battery (6.3v) 22 f (6.3v) sbd vbat gnd 4.7f pgnd1 vfb rflash tfb ovp gndsens pgnd2 ffb rtorch ovp open q s q r curdrv torch curdrv flash osc slope control ifmode flash (rstb) vio 2 ? ?
technical note 6/15 www.rohm.com 2011.05 - rev.b ? 2011 rohm co., ltd. all rights reserved. BD6062GU
technical note 7/15 www.rohm.com 2011.05 - rev.b ? 2011 rohm co., ltd. all rights reserved. BD6062GU control serial port specifications parameter symbol limits unit condition min. typ. max. cs input setup t sfs 50 - - ns cs input hold t hfs 50 - - ns csdi input setup t sdi 50 - - ns csdi input hold t hdi 50 - - ns clock cycle time t cyc 133.3 - - ns max 7.5 mhz duty ratio duty 40 50 60 % performance specifications are guar anteed, but not production tested. 2) register map symbol address [7:0] d[7] d[6] d[5] d[4] d[3] d[2] d[1] d[0] ena 01 (h) - - - - - - flash torch time 02 (h) - tmode tdelay2 tdelay1 tdelay0 tflash2 tflash1 tflash0 curr 03 (h) - - - clmt iflash1 iflash0 itorch1 itorch0 test 04 (h) - - - - test3 test2 test1 test0 test2 05 (h) - - - test24 test23 test22 test21 test20 *note: write access is prohibited in test and test2 registers. address?00(h)?, enable control 2-1) enable control flash torch output default 0 0 off * 0 1 itorch 1 0 iflash 1 1 itorch + iflash *when ifmode=h, each enable signal are controlled by cpu directly from pin. address?01(h)?, timer mode setting and flash timer period control 2-2) timer mode control tmode timer mode default 0 disable 1 enable *
technical note 8/15 www.rohm.com 2011.05 - rev.b ? 2011 rohm co., ltd. all rights reserved. BD6062GU 2-3) flash delay timer setting tdelay[2:0] tflash1 default 000 0ms * 001 5ms 010 10ms 011 15ms 100 20ms 101 25ms 110 30ms 111 35ms tflash1 : flash on delay timer it control the period from flash enable to light up. 2-4) flash on timer setting tflash[2:0] tflash2 default 000 50ms * 001 100ms 010 150ms 011 200ms 100 400ms 101 600ms 110 800ms 111 1000ms tflash2 : flash on timer it control the period from light up to off. *when ifmode=h, it does not use timer function. flash period is controlled by cpu directly. address?02(h)?, flash and torch current setting 2-5) output current setting for the torch current driver itorch[1:0] output current default ifmode=h 00 50ma * 01 100ma 10 150ma 11 200ma * 2-6) output current setting for the flash current driver iflash[1:0] output curr ent default ifmode=h 00 400ma * 01 500ma 10 600ma 11 800ma * 2-7) over power protection enable clmt current limit default ifmode=h 0 disable * * 1 enable
technical note 9/15 www.rohm.com 2011.05 - rev.b ? 2011 rohm co., ltd. all rights reserved. BD6062GU it depends on battery or external components condition, internal power consumption will be large at flash action and there is a possibility that it will over power dissipation of ic. BD6062GU can limit drive current on over power cond ition, and protect to over power dissipation. when this mode is enable, BD6062GU limit maximum current automatically as below. torch max200ma ? ? ? ? ? ? ? ? ? ? ? ?
technical note 10/15 www.rohm.com 2011.05 - rev.b ? 2011 rohm co., ltd. all rights reserved. BD6062GU ii) register control interface(3wired) mode (timer disable) iled1 : torch current driver iled2 : flash current driver tflash2 : flash period protect fig.30 3wired mode torch and flash timing (timer disable) if flash period is over tflash2 setting, flas h current driver will enable to turn off. protect time is controlled by flash on timer resister setting. iii) direct control interface mode there is led protect function in this mode. flash period is over 500ms, then this mode turn off flash. fig.31 direct control mode torch and flash timing iv) the voltage of vfb is as follows, (in dc/dc on) torch mode ? ?
technical note 11/15 www.rohm.com 2011.05 - rev.b ? 2011 rohm co., ltd. all rights reserved. BD6062GU 7) soft start BD6062GU has soft start function. soft start function will prevent the big peak current from ic and coil. the detail of soft start is as follows. fig.32 soft start diagram and timing 8) soft current limiter BD6062GU has soft current limiter function. soft current limiter function will c hange the value of current gradually. it has four steps. and the steps are as follows; 4step of soft current limiter action start 2nd step 3rd step 4th step normal time 0~500us 500~700us 700~800us 800~900us 900us~ current limit (dc) 0a* always 0.5a 1a 1.5a 2a current limit ?h (peak) 1.125a 1.75a 2.375a 3.0a 3.625a current limit ?l (peak) 0. 675a 1.05a 1.425a 1.8a 2.175a peak current of BD6062GU depends on only soft current limiter. switching frequency or vbat voltage does no t affect peak current of BD6062GU. 9) thermal shut down BD6062GU has a thermal shut down function. it works above 175 en vout a b ( dashed ) q
technical note 12/15 www.rohm.com 2011.05 - rev.b ? 2011 rohm co., ltd. all rights reserved. BD6062GU 10) safety functions 10-1) over voltage detect function (ovp) when ovp become more than 5.5v, ic stop the switching. when ovp become less than detect voltage, the status of switching will restart. 10-2) open detect function (odf) when ovp pin is not connected any comp onents, ic will stop the switching. fig.33 safety voltage range
technical note 13/15 www.rohm.com 2011.05 - rev.b ? 2011 rohm co., ltd. all rights reserved. BD6062GU
technical note 14/15 www.rohm.com 2011.05 - rev.b ? 2011 rohm co., ltd. all rights reserved. BD6062GU ( 6 ) short circuit between terminals 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 occurs due to foreign matters entering between terminals or between the terminal and the power supply or the gnd terminal, the ics can break down. ( 7 ) operation in str ong electromagnetic field be noted that using ics in the strong elec tromagnetic field can malfunction them. ( 8 ) inspection with set pcb on the inspection with the set pcb, if a capacitor is connect ed to a low-impedance ic terminal, the ic can suffer stress. therefore, be sure to discharge from t he set pcb by each process. furthermore, in order to mount or dismount the set pcb to/from the jig for the inspection process, be sure to turn off the power supply and then mount the set pcb to the jig. after the completion of the inspection, be sure to tu rn off the power supply and then dismount it from the jig. in addition, for protection against static electricity, establis h a ground for the assembly process and pay thorough attention to the transportation and t he storage of the set pcb. ( 9 ) input terminals in terms of the construction of ic, parasitic elements are in evitably formed in relation to potential. the operation of the parasitic element can cause interference with circuit operati on, thus resulting in a malf unction and then breakdown of the input terminal. therefore, pay thorou gh attention not to handle the input te rminals, such as to apply to the input terminals a voltage lower than the gnd respectively, so that any parasitic element wi ll operate. furthermore, do not apply a voltage to the input terminals when no power supply voltage is applied to the ic. in addition, even if the power supply voltage is applied, apply to the input terminals a voltage lower than the power supply voltage or within the guaranteed value of electrical characteristics. ( 10 ) ground wiring pattern if small-signal gnd and large-current gnd are provided, it will be recommended to separate the large-current gnd pattern from the small-signal gnd pattern and establish a si ngle ground at the reference poi nt of the set pcb so that resistance to the wiring pattern and voltage fluctuations due to a large current will cause no fluctuations in voltages of the small-signal gnd. pay att ention not to cause fluctuations in the gnd wiring pattern of external parts as well. ( 11 ) external capacitor in order to use a ceramic capacitor as the external capacitor, determine the c onstant with consideration given to a degradation in the nominal capacitance due to dc bias and c hanges in the capacitance due to temperature, etc. ( 12 ) thermal shutdown circuit (tsd) when junction temperatures become 175
technical note 15/15 www.rohm.com 2011.05 - rev.b ? 2011 rohm co., ltd. all rights reserved. BD6062GU ? 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 (unit : mm) vcsp85h2 (BD6062GU) 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 0.43 0.1 1pin mark 2.86 0.1 2.86 0.1 0.43 0.1 p=0.5 4 p=0.5 4 23- 0.30 0.05
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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