DR264-12 Version : PRE.004 Issue Date : 2012/02/29 File Name : SP-DR264-12-PRE004.doc Total Pages: 10 2 Segment String LED Open Reactivate IC with 0.2V voltage drop 新竹市科學園區展業一路 9 號 7 樓之 1 SILICON TOUCH TECHNOLOGY INC. 9-7F-1, Prosperity Road I, Science Based Industrial Park, Hsin-Chu, Taiwan 300, R.O.C. Tel：886-3-5645656 Fax：886-3-5645626 DR264-12 DR264-12 2 Segment String LED Open Reactivate IC with 0.2V voltage drop General Description The DR264-12 is a 2 segments open reactivate IC, designed for protecting continuous current switching mode inductive buck LED lighting systems. If any LED in the a continuous current switching mode inductive buck LED lighting system broke down and leave the system open, the DR264-12 will take the place of the LED that broke down and reactivate the entire string of LEDs while consuming less voltage drop than an average LED. The maximum bypass current value of DR264-12 in is 1A. The DR264-12 also provides low voltage drop with 1A bypass current. Built-in OVP and reverse connection protection circuits to avoid protector and LED burnt out. Features z 2 serial bypass segments z Maximum bypass current: 1 A z The voltage drop of one bypass segment at 1A bybass current: 0.2V z The total voltage drop of all segments simultaneous bypass at 1A bybass current: 1.6V (only for TO-252 package) z Reverse protection current of TO-252 package: 1A z Reverse protection current of SOT-23 package: 400mA Applications z LED string lighting Package Types z SOT-23; TO-252 2 Segment String LED Open Reactivate IC with 0.2V voltage drop Version:PRE.004 未經授權而逕予重製、複製、使用或公開本文件，行為人得被追究侵權之相關民刑事責任 Unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. Page 1 DR264-12 Pin Connection SOT-23 TO-252 Pin Description PIN No. PIN NAME FUNCTION SOT-23: 1; TO-252: 2 TERMINAL1 Supply voltage terminal SOT-23: 2; TO-252: 3 TERMINAL2 Terminal between the first segment and the second segment SOT-23: 3; TO-252: 4 TERMINAL3 Ground terminal 2 Segment String LED Open Reactivate IC with 0.2V voltage drop Version:PRE.004 未經授權而逕予重製、複製、使用或公開本文件，行為人得被追究侵權之相關民刑事責任 Unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. Page 2 DR264-12 Maximum Ratings (Ta=25°C, Tj(max) = 150°C) CHARACTERISTIC SYMBOL RATING UNIT Local supply voltage between terminal 1 and terminal 3 VLV 8 V DC voltage of Segment VDS 4 V Bypass current IBP 1000 mA Reverse protection current IRP Power Dissipation Pd 400 (SOT-23) mA 1000 (TO-252 ) 0.69 (SOT-23 : Ta=25°C) W 2.01 (TO-252 : Ta=25°C) 100 (SOT-23 ) Rth(j-c) 2(TO-252) Thermal Resistance °C/W 180 (SOT-23 ) Rth(j-a) 62(TO-252) Operating Temperature Top -15 ~ 125 °C Storage Temperature Tstg -55 ~ 150 °C Recommended Operating Condition CHARACTERISTIC SYMBOL CONDITION MIN. TYP. MAX. UNIT 4 6 8 V ⎯ Local supply voltage between terminal 1 and terminal 3 VLV DC Voltage of Segment VDS ⎯ 2 3 4 V Bypass current IBP ⎯ 150 350 1000 mA UNIT Electrical Characteristics (Ta = 25°C unless otherwise noted) CHARACTERISTIC The voltage drop of one bypass segment The total voltage drop of all segments simultaneous bypass Reverse voltage drop SYMBOL VDV(one) VDV(all) CONDITION MIN. TYP. MAX. IBP=150mA 0.02 0.06 0.1 IBP=350mA 0.06 0.13 0.2 IBP=1A 0.2 0.35 0.5 IBP=150mA 0.8 1 1.2 IBP=350mA 1 1.2 1.4 IBP=1A 1.6 1.75 1.9 IRP=400mA 1.15 1.4 1.65 IRP=1A 1.6 1.75 1.9 6 7 8 V 1 5 10 uA VRV Activating voltage VAV Supply current IDD V V V VLV =8V 2 Segment String LED Open Reactivate IC with 0.2V voltage drop Version:PRE.004 未經授權而逕予重製、複製、使用或公開本文件，行為人得被追究侵權之相關民刑事責任 Unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. Page 3 DR264-12 Power Dissipation The power dissipation of a semiconductor chip is limited to its package and ambient temperature, in which the protector requires the maximum bypass current calculated for given operating conditions. The maximum allowable power consumption can be calculated by the following equation: Pd(max)(Watt) = Tj(junction temperature)(max)(°C)– Ta(ambient temperature)(°C) Rth(junction-to-air thermal resistance)(°C/Watt) The relationship between power dissipation and operating temperature can be refer to the figure below: Power Dissipation Pd(W) 3 Tj(max)=150°C 2.5 Rth(TO-252)=62°C/Watt 2 Rth(SOT-23)=180°C/Watt TO-252 1.5 1 SOT-23 0.5 0 0 20 40 60 80 100 120 140 160 Ambient Temperature Ta(℃) 2 Segment String LED Open Reactivate IC with 0.2V voltage drop Version:PRE.004 未經授權而逕予重製、複製、使用或公開本文件，行為人得被追究侵權之相關民刑事責任 Unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. Page 4 DR264-12 Typical Application Note: When an LED break down and the upper segment of DR264 becomes the alternative current passage, if the overshot voltage generated by system parasitic inductance leads to the voltage drop of the lower segment exceeding activating voltage, will turn on the lower segment. The phenomena could be eliminated by power reset or adding a 470uH inductance on top of the LED string. 2 Segment String LED Open Reactivate IC with 0.2V voltage drop Version:PRE.004 未經授權而逕予重製、複製、使用或公開本文件，行為人得被追究侵權之相關民刑事責任 Unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. Page 5 DR264-12 Typical Application Note: When an LED break down and the upper segment of DR264 becomes the alternative current passage, if the overshot voltage generated by system parasitic inductance leads to the voltage drop of the lower segment exceeding activating voltage, will turn on the lower segment. The phenomena could be eliminated by power reset or adding a 470uH inductance on top of the LED string. 2 Segment String LED Open Reactivate IC with 0.2V voltage drop Version:PRE.004 未經授權而逕予重製、複製、使用或公開本文件，行為人得被追究侵權之相關民刑事責任 Unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. Page 6 DR264-12 Package Outline Dimension SOT-23 DIMENSIONS IN MM SYMBOLS MIN. TYP. MAX. SYMBOLS MIN. TYP. MAX. A - - 1.450 E1 A1 0.000 - 0.150 L A2 0.900 1.15 1.300 L1 0.600 REF b 0.300 - 0.500 L2 0.250 BSC c 0.080 - 0.220 R 0.100 - - 1.60 BSC 0.300 0.450 0.600 D 2.90 BSC R1 0.100 - 0.250 E 2.80 BSC θ° 0 4 8 e 0.95 BSC θ1° 5 10 15 e1 1.90 BSC 2 Segment String LED Open Reactivate IC with 0.2V voltage drop Version:PRE.004 未經授權而逕予重製、複製、使用或公開本文件，行為人得被追究侵權之相關民刑事責任 Unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. Page 7 DR264-12 TO-252 DIMENSIONS IN MM SYMBOLS MIN. TYP. MAX. SYMBOLS MIN. TYP. MAX. A 2.184 - 2.388 E 6.350 - 6.731 A1 0.000 - 0.127 E1 3.810 - - A2 1.016 - 1.270 e 0.508 TYP b 1.270 BSC. H 9.398 1.397 - 10.414 b2 5.207 - 5.461 L c 0.457 - 0.584 L1 c1 0.457 - 0.584 L2 1.270 - 2.032 D 5.334 - 5.588 θ° 0 - 4 D1 4.572 - - 2 Segment String LED Open Reactivate IC with 0.2V voltage drop 1.778 2.667 REF. Version:PRE.004 未經授權而逕予重製、複製、使用或公開本文件，行為人得被追究侵權之相關民刑事責任 Unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. Page 8 DR264-12 The products listed herein are designed for ordinary electronic applications, such as electrical appliances, audio-visual equipment, communications devices and so on. Hence, it is advisable that the devices should not be used in medical instruments, surgical implants, aerospace machinery, nuclear power control systems, disaster/crime-prevention equipment and the like. Misusing those products may directly or indirectly endanger human life, or cause injury and property loss. Silicon Touch Technology, Inc. will not take any responsibilities regarding the misusage of the products mentioned above. Anyone who purchases any products described herein with the above-mentioned intention or with such misused applications should accept full responsibility and indemnify. Silicon Touch Technology, Inc. and its distributors and all their officers and employees shall defend jointly and severally against any and all claims and litigation and all damages, cost and expenses associated with such intention and manipulation. Silicon Touch Technology, Inc. reserve the right to make changes to their products or to discontinue any product or service without notice, and advise customers to obtain the latest version of relevant information to verify, before placing orders, that information being relied on is current and complete. 2 Segment String LED Open Reactivate IC with 0.2V voltage drop Version:PRE.004 未經授權而逕予重製、複製、使用或公開本文件，行為人得被追究侵權之相關民刑事責任 Unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement. Page 9