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A3916 Schematic ( PDF Datasheet ) - Allegro MicroSystems

Teilenummer A3916
Beschreibung Dual DMOS Full-Bridge Motor Driver
Hersteller Allegro MicroSystems
Logo Allegro MicroSystems Logo 




Gesamt 11 Seiten
A3916 Datasheet, Funktion
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 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
SLEEPn
IN1
IN2
CINL3K
IN4
VCP
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






A3916 Datasheet, Funktion
A3916
Dual DMOS Full-Bridge Motor Driver
CONTROL LOGIC
Table 1: DC Motor Operation
IN1 IN2 OUT1A OUT1B
0 0 Off Off
1
0
High
Low
0 1 Low High
1 1 Low Low
Function
Disabled
Forward
Reverse
Brake
IN3 IN4 OUT2A OUT2B
0 0 Off Off
1
0
High
Low
0 1 Low High
1 1 Low Low
Function
Disabled
Forward
Reverse
Brake
Table 2: Stepper Motor Operation
IN1 IN2 IN3 IN4
0000
1010
0010
0110
0100
0101
0001
1001
1000
OUT1A
Off
High
Off
Low
Low
Low
Off
High
High
OUT1B
Off
Low
Off
High
High
High
Off
Low
Low
OUT2A
Off
High
High
High
Off
Low
Low
Low
Off
OUT2B
Off
Low
Low
Low
Off
High
High
High
Off
Disabled
Full Step 1
Full Step 2
Full Step 3
Full Step 4
Function
Disabled
½ Step 1
½ Step 2
½ Step 3
½ Step 4
½ Step 5
½ Step 6
½ Step 7
½ Step 8
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
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