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A3948SB Datasheet(PDF) 3 Page - Allegro MicroSystems |
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A3948SB Datasheet(HTML) 3 Page - Allegro MicroSystems |
3 / 13 page 3948 DMOS FULL-BRIDGE PWM MOTOR DRIVER 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 2 Copyright © 2001, 2002 Allegro MicroSystems, Inc. FUNCTIONAL BLOCK DIAGRAM A3948SB (DIP) Note that the A3948SLB (SOIC) and A3948SB (DIP) do not share a common terminal assignment. CHARGE PUMP BANDGAP VDD CREG TSD UNDER- VOLTAGE & FAULT DETECT CHARGE PUMP BANDGAP REGULATOR VDD VBB + LOGIC SUPPLY VREG LOAD SUPPLY Dwg. FP-048 SLEEP MODE RANGE CONTROL LOGIC PROGRAMMABLE PWM TIMER SENSE RS FIXED OFF BLANK DECAY MODE PHASE ENABLE CLOCK DATA STROBE RANGE REFERENCE BUFFER & DIVIDER CURRENT SENSE ZERO CURRENT DETECT OSC OUTA OUTB REF SERIAL PORT VREF CS SERIAL PORT ÷ VBB 24 23 22 21 20 19 18 17 16 15 14 13 GROUND GROUND RANGE VREG OUTB LOAD SUPPLY SENSE OUTA MODE REF Dwg. PP-069-1A 1 2 3 4 5 6 7 8 9 12 11 10 9 GROUND GROUND CP CP2 CP1 PHASE VDD LOGIC SUPPLY ENABLE DATA CLOCK STROBE θ OSC CHARGE PUMP GROUND GROUND |
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