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A3977SED-T Datasheet(PDF) 3 Page - Allegro MicroSystems |
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A3977SED-T Datasheet(HTML) 3 Page - Allegro MicroSystems |
3 / 19 page Microstepping DMOS Driver with Translator A3977 3 Allegro MicroSystems, LLC 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com FUNCTIONAL BLOCK DIAGRAM DMOS H BRIDGE DMOS H BRIDGE CHARGE PUMP CP2 CP1 VCP LOAD SUPPLY VBB1 OUT 1A OUT1B OUT 2A OUT2B VBB2 SENSE1 VCP Dwg. FP-050-2 VREG PWM TIMER PWM TIMER PWM LATCH BLANKING MIXED DECAY UVLO AND FAULT REGULATOR BANDGAP DAC + - + - DAC 2 V SENSE1 PWM LATCH BLANKING MIXED DECAY SENSE2 4 4 REF LOGIC SUPPLY VDD STEP DIR MS 1 SLEEP MS 2 HOME ENABLE RC1 RESET SR PFD RC2 REF. SUPPLY VPFD |
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