A3971 Datasheet | Allegro MicroSystems

Data Sheet 29319.32 ADVANCE INFORMATION (Subject to change without notice) May 2, 2000 DUAL DMOS FULL-BRIDGE DRIVER Designed to interface between external PWM control logic and NO CONNECTION LOGIC GROUND LOGIC SUPPLY 23 PWM2 inductive loads such as relays, solenoids, dc motors, or stepper motors, each full bridge can operate with output currents to ±2.5 A and operating voltages to 50 V. S10 3 OUT1A 4 22 S20 21 OUT2A Low r DS(on) DMOS output drivers provide low power dissipation during PWM operation. Internal charge pump circuitry is used to create LOAD SUPPLY1 VBB1 LOAD 20 VBB2 SUPPLY2 a boosted voltage to fully enhance the high-side DMOS switches. LOGIC LOGIC GROUND 6 GROUND 7 t SENSE1 8 c OUT1B 99 u S11 10 d PWM1 11 ro ly CP1 12 CHARGE PUMP 19 GROUND 18 GROUND 17 SENSE2 16 OUT2B 15 S21 14 VCP 13 CP2 Dwg. PP-069-2 d P On...