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A3977 Datasheet(PDF) 2 Page - Allegro MicroSystems |
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A3977 Datasheet(HTML) 2 Page - Allegro MicroSystems |
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2 / 18 page  Microstepping DMOS Driver with Translator A3977 2 Allegro MicroSystems, Inc. 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com Selection Guide Part Number Packing Package Ambient Temperature, TA (°C) A3977KEDTR-T 450 per reel 44-pin PLCC –40 to 125 A3977SEDTR-T 450 per reel 44-pin PLCC –20 to 85 A3977SLPTR-T 4000 per reel 28-pin TSSOP Absolute Maximum Ratings Characteristic Symbol Notes Rating Units Load Supply Voltage VBB 35 V Logic Supply Voltage VDD 7.0 V Logic Input Voltage Range VIN Pulsed, tw > 30 ns –0.3 to VDD+ 0.3 V Pulsed, tw < 30 ns –1.0 to VDD+ 1 V Reference Voltage VREF VDD V Sense Voltage (DC) VSENSE 0.5 V Output Current IOUT Output current rating may be limited by duty cycle, ambient temperature, and heat sinking. Under any set of conditions, do not exceed the specified current rating or a junction temperature of 150°C. ±2.5 A Operating Ambient Temperature TA Range K –40 to 125 ºC Range S –20 to 85 ºC Maximum Junction Temperature TJ(max) 150 ºC Storage Temperature Tstg –55 to 150 ºC Thermal Characteristics Characteristic Symbol Test Conditions* Value Units Package Thermal Resistance RθJA Package ED, on 4-layer PCB based on JEDEC standard 22 ºC/W Package LP, on 4-layer PCB based on JEDEC standard 28 ºC/W *Additional thermal information available on the Allegro website. |
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