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A6284-1 Datasheet(PDF) 2 Page - Allegro MicroSystems |
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A6284-1 Datasheet(HTML) 2 Page - Allegro MicroSystems |
2 / 24 page Linear Current Regulator and Controller for Automotive LED Arrays A6274, A6274-1 A6284, A6284-1 2 Allegro MicroSystems, LLC 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com ABSOLUTE MAXIMUM RATINGS3 Characteristic Symbol Notes Rating Unit VIN, OUT, DR, EN1, EN2, COMP, FFn VIN, VOUT, VCOMP, VDR, VEN1, VEN2, VFFn −0.3 to 45 V GATE VGATE Max of (–0.3 or VIN – 9) to 45 V LED1 to LED6 VLEDx −0.5 to 45 V All other pins −0.3 to 6.5 V Junction Temperature TJ −40 to 150 °C Transient Junction Temperature TJt Overtemperature event not exceeding 10 seconds, lifetime duration not exceeding 10 hours, determined by design characterization. 175 °C Storage Temperature Range Tstg −55 to 150 °C 3 Stresses beyond those listed in this table may cause permanent damage to the device. The absolute maximum ratings are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the Electrical Characteristics table is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. THERMAL CHARACTERISTICS Characteristic Symbol Test Conditions4 Value Unit Junction-to-Ambient Thermal Resistance RθJA Estimated, on 4-layer PCB based on JEDEC standard 29 °C/W 4 Additional thermal information available on the Allegro website. SELECTION GUIDE Part Number ILED(MAX) FAULT Response (see Table 2 for details) Package Packing1 A6274KLPTR-T 60 mA per channel Unlatched MODE0 20-pin eTSSOP with thermal pad 4,000 pieces per 13-in. reel A6284KLPTR-T 120 mA per channel Unlatched MODE0 A6274KLPTR-1-T 60 mA per channel Latched MODE1 A6284KLPTR-1-T 120 mA per channel Latched MODE1 1 Contact Allegro™ for additional packing options. SPECIFICATIONS A GATE pin is provided to drive an external P-channel MOSFET, whichservesasanactiveballastresistortoreducetheheatdissipation within the IC package. It also serves as an input disconnect switch in the event of an LED string short-to-ground fault. The A6274 and A6284 provide a non-latching option while the A6274-1 and A6284-1 provide a latching option. DESCRIPTION (continued) |
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