 |
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
| Datasheet File OCR Text: |
| 1/22 www.rohm.com 2011.08 - rev.c ? 2010 rohm co., ltd. all rights reserved. power management ics for au tomotive body control white backlight led drivers for medium to large lcd panels (switching regulator type) BD8112EFV-M description BD8112EFV-M is a white led driver with the capability of withstanding high input voltage (36v max). this driver has 2ch constant-current drivers in tegrated in 1-chip, which each channel can draw up to 150ma max, so that high brightness led driving can be realized. furthermore, a current-mode buck-b oost dc/dc controller is also integrated to achieve stable operation against voltage input and also to remo ve the constraint of the number of leds in series connection. the brightness can be controlled by either pwm or vdac techniques. features 1) input voltage range 5.0 -30 v 2) integrated buck-boost cu rrent-mode dc/dc controller 3) two integrated led current driver channels (150 ma max. each channel) 4) pwm light modulation (minimum pulse width 25s) 5) oscillation frequency accuracy 5% 6) built-in protection functions (uvlo, ovp, tsd, ocp, scp) 7) led abnormal status detection function (open/ short) 8) htssop-b24 package applications backlight for display audio, small type panels, etc. absolute maximum ratings (ta=25 ) parameter symbol ratings unit power supply voltage v cc 36 v boot , outh voltage v boot, v outh 41 v sw, cs voltage v sw, v cs 36 v boot-sw voltage v boot-sw 7 v led output voltage v led1,2 36 v vreg, ovp, outl, fail1, fail2, leden, iset, vdac, pwm, ss, comp, rt, sync, en voltage v vreg, v ovp, v outl, v fail1, v fail2, v leden, v iset, v vdac, v pwm, v ss, v comp, v rt, v sync, v en -0.3 7 < v cc v power consumption pd 1.10 *1 w operating temperatur e range topr -40 +105 storage temperature range tstg -55 +150 led maximum output current i led 150 *2 *3 ma junction temperature tjmax 150 *1 ic mounted on glass epoxy board measuring 70mm 70 mm 1.6mm, power dissipated at a rate of 8.8mw/ at temperatures above 25 . *2 dispersion figures for led maximum output current and vf are correlated. please refer to data on separate sheet. *3 amount of current per channel. no.11039ect11
technical note 2/22 www.rohm.com 2011.08 - rev.c ? 2010 rohm co., ltd. all rights reserved. BD8112EFV-M technical note 3/22 www.rohm.com 2011.08 - rev.c ? 2010 rohm co., ltd. all rights reserved. BD8112EFV-M parameter symbol limits unit conditions min typ max. [ovp block] over-voltage detection reference voltage v ovp 1.9 2.0 2.1 v v ovp =sweep up ovp hysteresis width v ohys 0.45 0.55 0.65 v v ovp =sweep down scp latch off delay time t scp 70 100 130 ms r t =100k technical note 4/22 www.rohm.com 2011.08 - rev.c ? 2010 rohm co., ltd. all rights reserved. BD8112EFV-M temperature:ta [] ? temperature:ta [] technical note 5/22 www.rohm.com 2011.08 - rev.c ? 2010 rohm co., ltd. all rights reserved. BD8112EFV-M technical note 6/22 www.rohm.com 2011.08 - rev.c ? 2010 rohm co., ltd. all rights reserved. BD8112EFV-M technical note 7/22 www.rohm.com 2011.08 - rev.c ? 2010 rohm co., ltd. all rights reserved. BD8112EFV-M ? technical note 8/22 www.rohm.com 2011.08 - rev.c ? 2010 rohm co., ltd. all rights reserved. BD8112EFV-M ? ? R ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? technical note 9/22 www.rohm.com 2011.08 - rev.c ? 2010 rohm co., ltd. all rights reserved. BD8112EFV-M ? ? ? ? Q ? ? ? ? ? ? ? technical note 10/22 www.rohm.com 2011.08 - rev.c ? 2010 rohm co., ltd. all rights reserved. BD8112EFV-M ? ? ? Q technical note 11/22 www.rohm.com 2011.08 - rev.c ? 2010 rohm co., ltd. all rights reserved. BD8112EFV-M R vcc en uvlo vdac sync pwm ss iled1 iled2 iled1' iled2' vled1 vled2 vled1' vled2' vovp fail1 fail2 4.45v 1.0 <0.3 >4.5 100ms 3 0.3v 100ms 3 2.0v 1.7v 1 2 2 1 4 vreg technical note 12/22 www.rohm.com 2011.08 - rev.c ? 2010 rohm co., ltd. all rights reserved. BD8112EFV-M technical note 13/22 www.rohm.com 2011.08 - rev.c ? 2010 rohm co., ltd. all rights reserved. BD8112EFV-M 1. computation of the input peak current and il_max ? ? ? ? D D D technical note 14/22 www.rohm.com 2011.08 - rev.c ? 2010 rohm co., ltd. all rights reserved. BD8112EFV-M 5. selection of the output capacitor select the output capacitor cout based on th e requirement of the ripple voltage vpp. vpp = ? ? ? ? technical note 15/22 www.rohm.com 2011.08 - rev.c ? 2010 rohm co., ltd. all rights reserved. BD8112EFV-M 8. setting of the over-voltage protection we recommend setting the over-voltage protection vovp 1.2v to 1.5v greater than vout which is adjusted by the number of leds in series connection. less than 1.2v may cause unexpected detection of the led open and short during the pwm brightness control. for the vovp greater than 1.5v, the led short detection may become invalid. 9. setting of the soft-start the soft-start allows minimization of the coil current as well as the overshoot of the output voltage at the start-up. for the capacitance we reco mmend in the range of 0.001 ? 2.0v/1.45v 1.7v/1.6v ovp vo rovp2 rovp1 technical note 16/22 www.rohm.com 2011.08 - rev.c ? 2010 rohm co., ltd. all rights reserved. BD8112EFV-M technical note 17/22 www.rohm.com 2011.08 - rev.c ? 2010 rohm co., ltd. all rights reserved. BD8112EFV-M 1. comp 2. ss 3. vcc 4. en 5. rt 6. sync 7. gnd fin. fin 8. pwm 9. fail1 10. fail2 11. leden 12. led1 13. led2 24. vreg 23. boot 22. cs 21. outh 20. sw 19. dgnd 18. outl fin. fin 17. pgnd 16. iset 15. vdac 14. ovp vcc vcc cin1 cin2 cpc2 cpc1 rpc1 css en sw1 crt rrt sync cin3 pwm rfl1 rfl2 vreg fail1 fail2 vreg sw2 led1 led2 vdac rdac vreg ciset riset d1 l1 d g m2 s cout1 cout2 d2 rovp1 rovp2 cbt creg m 1 s d g rcs 5 vreg vout ccs rcs1 rcs2 rcs3 fin. fin technical note 18/22 www.rohm.com 2011.08 - rev.c ? 2010 rohm co., ltd. all rights reserved. BD8112EFV-M ? ? ? ? ? ? ? ? ? ? ? technical note 19/22 www.rohm.com 2011.08 - rev.c ? 2010 rohm co., ltd. all rights reserved. BD8112EFV-M technical note 20/22 www.rohm.com 2011.08 - rev.c ? 2010 rohm co., ltd. all rights reserved. BD8112EFV-M 20. sw 21. outh 22. cs 23. boot 24. vreg *all values typical. technical note 21/22 www.rohm.com 2011.08 - rev.c ? 2010 rohm co., ltd. all rights reserved. BD8112EFV-M 7. radiation strong electromagnetic radiati on can cause operation failures. 8. aso(area of safety operation.) do not exceed the maximum aso and the absolu te maximum ratings of the output driver. 9. tsd(thermal shut-down) the tsd is activated when the juncti on temperature (tj) reaches 175 technical note 22/22 www.rohm.com 2011.08 - rev.c ? 2010 rohm co., ltd. all rights reserved. BD8112EFV-M (unit : mm) htssop-b24 0.65 1.0max 0.850.05 0.080.05 0.24 +0.05 - 0.04 0.08 m s 0.08 1.00.2 0.530.15 0.17 +0.05 - 0.03 4 + 6 ? 4 s 24 13 112 0.325 (3.4) (5.0) 7.80.1 7.60.2 5.60.1 (max 8.15 include burr) 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. |
Price & Availability of BD8112EFV-M
 |
|
|
|
|
All Rights Reserved © IC-ON-LINE 2003 - 2022 |
| [Add Bookmark] [Contact Us] [Link exchange] [Privacy policy] |
|
Mirror Sites : [www.datasheet.hk]
[www.maxim4u.com] [www.ic-on-line.cn]
[www.ic-on-line.com] [www.ic-on-line.net]
[www.alldatasheet.com.cn]
[www.gdcy.com]
[www.gdcy.net] |