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| 1/16 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. power management ics for automotive body control led drivers for automotive light bd8372hfp-m,bd8372efj-m description bd8372hfp-m and bd8372efj-m are a led source driver with the capability of withstanding high input voltage (50v max). the fixed current output can change in the h/l current, and it is the best for automotive led drive. it is built into led open/short protection, external resistanc e open/short protection and overvoltage ov erheating protection and high reliability can be achieved. when driving two or more led by using two or more ic, it can be done to control led all together turning off even if led causes short/open in a certain row. features 1) input voltage range 5.5 40v 2) changeable type fixed current source driver(200 ma max), current accuracy 3%(vin=13 v, ta=25 ) 3) h/l current setting switch control 4) built-in led open/short protection circuit 5) built-in iset open/short protection circuit 6) built-in overvoltage over heating protection and tem perature protection circuit 7) error state output detection function (pbus) 8) hrp7/htsop-j8 package applications for automotive (lear lamp, interior light, etc.) absolute maximum ratings (ta=25 ) parameter symbol ratings unit power supply voltage v vin 50 v stop, iout, pbus terminal v stop , v iout , v pbus 50 v iseth, isetl terminal v iseth , v isetl 7 v power consumption pd 2.3(hrp7) *1 w 1.1(htsop-j8) *2 operating temperature range topr -40 125 storage temperature range tstg -55 150 joint part temperature tjmax 150 iout output maximum current i iout 200 ma *1 hrp7 ic mounted on glass epoxy 2 layer board, area 15mmx15 mm of the back copper foil, measuring 70mm70mm1.6mm l ess than copper foil share 3%, power dissipated at a rate of 18.4mw/ at temperatures above 25 . *2 htsop-j8 ic mounted on glass epoxy 2 layer board, area 15mmx15 mm of the back copper foil, measuring 70mm70mm1.6mm l ess than copper foil share 3%, power dissipated at a rate of 88mw/ at temperatures above 25 . operating conditions (ta=-40 +125) please set after considering power consumption for the power-supply voltage. parameter symbol ratings unit conditions min. typ. max. power supply voltage vin 5.5 13 40 v - current setting resistance r iseth 10k - 100k stop=h r isetl 10k - 100k stop=l no.11039eat13
technical note 2/16 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. bd8372hfp-m,bd8372efj-m technical note 3/16 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. bd8372hfp-m,bd8372efj-m technical note 4/16 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. bd8372hfp-m,bd8372efj-m vref vin stop iseth gnd iout current control r iseth vin vin-0.2v isetl r isetl vref vref pbus led off h/l mode set b+ iref_l iref_h iref_l iref_h protect led open mode led open det 0.6v led short led gnd short det 0.8v 0.8v technical note 5/16 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. bd8372hfp-m,bd8372efj-m technical note 6/16 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. bd8372hfp-m,bd8372efj-m technical note 7/16 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. bd8372hfp-m,bd8372efj-m pin no. pin name equivalent-circuit diagram of the terminals 5 iseth 6 vin - 7 iout vin (6pin) gnd (4pin) iout (7pin) 5v vin (6pin) gnd (4pin) iseth (5pin) 5v 5v technical note 8/16 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. bd8372hfp-m,bd8372efj-m ?Q Q ?Q Q Q Q ?Q Q ?Q Q Q Q Q Q Q technical note 9/16 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. bd8372hfp-m,bd8372efj-m technical note 10/16 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. bd8372hfp-m,bd8372efj-m iout output currentvs iset connect resistance 0.0010 0.0100 0.1000 1.0000 1.00e+03 1.00e+04 1.00e+05 1.00e+06 riset[] iout[a] h mode l mode r_iset setting range short protection open protection vin stop iout pbus +b led open current control h/l mode switch 0.8v(typ) gnd iref_l iref_l isetl iseth 0.8v(typ) r isetl r iseth ? ? ??? ? ? [ [ma] 502500 40k v8.0 i 40k rexp [a]2500 r v8.0 i iout iseth iseth iout ??? ? ?? [ technical note 11/16 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. bd8372hfp-m,bd8372efj-m Q current control + - + - iset current limit vin-0.2v vin-0.5v led_open iout vin technical note 12/16 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. bd8372hfp-m,bd8372efj-m vin iout pbus=hi-z ?low led open stop pbus isetl iseth gnd +b iout vin stop pbus isetl iseth gnd led off iout vin stop pbus isetl iseth gnd led off protectbus ? pbus becomes low from hi-z because of the led open. turning off the led driver of another ch detects error and led is controlled by pubs becomes low. viout clamps to 1.4v and prevents gnd short detection in the matrix at turning off. technical note 13/16 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. bd8372hfp-m,bd8372efj-m technical note 14/16 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. bd8372hfp-m,bd8372efj-m 2.30 25 150 105 150 0 0.75 0.60 0.45 0.30 pd [w] 109 133.7 125 ta [] iomax [ma] 115 92 117.4 vf=8v vf=9v vf=10v vf=11v 125.5 hpp7 iomax pd 1.10 25 150 105 150 0 0.75 0.60 pd [w] 125 ta [] iomax [ma] 132 110 116 vf=8v vf=9v vf=10v vf=11v htsop-j8 99 79.2 73.3 55 44 99 65 82 0.45 0.30 iomax pd technical note 15/16 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. bd8372hfp-m,bd8372efj-m technical note 16/16 www.rohm.com 2011.04 - rev. a ? 2011 rohm co., ltd. all rights reserved. bd8372hfp-m,bd8372efj-m (unit : mm) htsop-j8 0.08 s 0.08 m s 1.0max 0.850.05 1.27 0.080.08 0.42 +0.05 - 0.04 1.050.2 0.650.15 4 + 6 ? 4 0.17 +0.05 - 0.03 234 568 (max 5.25 include burr) 7 1 0.545 (3.2) 4.90.1 6.00.2 (2.4) 3.90.1 1pin mark ? order quantity needs to be multiple of the minimum quantity. 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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