A3916 Datasheet, PDF (1/11 Pages) Allegro MicroSystems – Dual DMOS Full-Bridge Motor Driver

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 R_DS(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 low-
voltage 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. 1
Figure 1: Typical Applications
October 6, 2016