DR264-12

DR264-12 SITI | Alldatasheet

Document overview

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Technical content

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 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

2 Segment String LED Open Reactivate IC with 0.2V voltage drop Version:PRE.004 P a g e 1 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. 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 ope n reactivate IC, designed for pr otecting continuous current switching mode inductive buck LED lighting system s. If any LED in the a continuous current switching mode inductive buck LED lighting syst em 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 av erage LED. The maximum bypass current value of DR264-12 in is 1A. The DR264-12 also provides low voltage drop w ith 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 SOT-23; TO-252

2 Segment String LED Open Reactivate IC with 0.2V voltage drop Version:PRE.004 P a g e 2 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. DR264-12 Pin Connection S O T - 2 3 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 P a g e 3 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. 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 400 (SOT-23) Reverse protection current IRP 1000 (TO-252 ) mA 0.69 (SOT-23 : Ta=25°C) Power Dissipation Pd 2.01 (TO-252 : Ta=25°C) W 100 (SOT-23 ) Rth(j-c) 2(TO-252) 180 (SOT-23 ) Thermal Resistance Rth(j-a) 62(TO-252) °C/W Operating Temperature Top -15 ~ 125 °C Storage Temperature Tstg -55 ~ 150 °C Recommended Operating Condition CHARACTERISTIC SYMBOL CONDITION MIN. TYP . MAX. UNIT Local supply voltage between terminal 1 and terminal 3 VLV ⎯ 4 6 8 V DC Voltage of Segment VDS ⎯ 2 3 4 V Bypass current IBP ⎯ 150 350 1000 mA

Electrical Characteristics

(Ta = 25°C unless otherwise noted) CHARACTERISTIC SYMBOL CONDITION MIN. TYP . MAX. UNIT IBP=150mA 0.02 0.06 0.1 IBP=350mA 0.06 0.13 0.2 The voltage drop of one bypass segment VDV(one) IBP=1A 0.2 0.35 0.5 V IBP=150mA 0.8 1 1.2 IBP=350mA 1 1.2 1.4 The total voltage drop of all segments simultaneous bypass VDV(all) IBP=1A 1.6 1.75 1.9 V IRP=400mA 1.15 1.4 1.65 Reverse voltage drop VRV IRP=1A 1.6 1.75 1.9 V Activating voltage VAV 6 7 8 V Supply current IDD VLV =8V 1 5 10 uA

2 Segment String LED Open Reactivate IC with 0.2V voltage drop Version:PRE.004 P a g e 4 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. 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 di ssipation and operating temperatur e can be refer to the figure below: 0.5 1.5 2.5 0 20 40 60 80 100 120 140 160 Ambient Temperature Ta(℃) Power Dissipation Pd(W) TO-252 SOT-23 Tj(max)=150°C Rth(TO-252)=62°C/Watt Rth(SOT-23)=180°C/Watt

2 Segment String LED Open Reactivate IC with 0.2V voltage drop Version:PRE.004 P a g e 5 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. DR264-12 Typical Application Note: When an LED break down and the upper segment of DR264 becomes th e alternative current passage, if the overshot voltage generate d 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 P a g e 6 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. DR264-12 Typical Application Note: When an LED break down and the upper segment of DR264 becomes th e alternative current passage, if the overshot voltage generate d 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 P a g e 7 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. DR264-12 Package Outline Dimension SOT-23 DIMENSIONS IN MM A - - 1.450 E1 1.60 BSC 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 - - 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 P a g e 8 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. DR264-12 TO-252 DIMENSIONS IN MM A 2.184 - 2.388 E 6.350 - 6.731 A1 0.000 - 0.127 E1 3.810 - - A2 1.016 - 1.270 e 1.270 BSC. b 0.508 TYP H 9.398 - 10.414 b2 5.207 - 5.461 L 1.397 1.778 c 0.457 - 0.584 L1 2.667 REF. 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 Version:PRE.004 P a g e 9 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. DR264-12 The products listed herein are designed fo r 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, aerospa ce machinery, nuclear power control systems, disaster/crime-prevention eq uipment and the like. Misusing those products may directly or indirectly endan ger 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 res ponsibility and indemnify. Silicon Touch Technology, Inc. and its distributors and a ll 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 info rmation to verify, before placing orders, that information being relied on is current and complete.