A3916

A3916 Dual DMOS Full-Bridge Motor Driver FEATURES AND BENEFITS Wide, 2.7 to 15 V input voltage operating range Dual DMOS full-bridges: drive two DC motors or one stepper motor Low RDS(ON) outputs Synchronous rectification for reduced power dissipation Low-current sleep mode Overcurrent protection Internal UVLO and thermal shutdown circuitry Integrated charge pump Pin-to-pin compatible with A3906 PACKAGES: 16-contact QFN 3 mm × 3 mm (suffix ES) DESCRIPTION Designed for pulse-width-modulated (PWM) control of lowvoltage stepper motors and single and dual DC motors, the A3916 is capable of output currents up to 1 A per channel and operating voltages from 2.7 to 15 V. The A3916 has an internal fixed off-time PWM timer that sets a peak current based on the selection of a current sense resistor. An output fault flag is provided that notifies the user of a TSD or overcurrent protection event. The A3916 is supplied in a low-profile 3 × 3 mm 16-terminal QFN (suffix “ES”) and a low-profile 4 × 4 mm 20-terminal QFN (suffixes “ES, -1”) both with exposed power tabs for enhanced thermal dissipation. 20-contact QFN 4 mm × 4 mm (suffix ES,-1) Not to scale VCP SLEEPn IN1 IN2 CINL3K IN4 VBB A3916 OUT1A OUT1B FAULTn SENSE1 OUT2A OUT2B GND SENSE2 0.1 µF 2.7 to 15 V DC Motor DC Motor VCP SLEEPn IN1 IN2 CINL3K IN4 A3916 VBB OUT1A OUT1B FAULTn GND SENSE1 OUT2A OUT2B SENSE2 0.1 µF 2.7 to 15 V Step Motor A3916-DS, Rev. 6 MCO-0000139 Figure 1: Typical Applicati...