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
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.
PACKAGEs:
16-contact QFN
3 mm × 3 mm
(suffix ES)
20-contact QFN
4 mm × 4 mm
(suffix ES,-1)
Not to scale
VCP
0.1 µF
VBB
SLEEPn
IN1
IN2
CLK
IN3
IN4
2.7 to 15 V
SLEEPn
VCP
0.1 µF
VBB
2.7 to 15 V
A3916
OUT1A
OUT1B
IN1
IN2
CLK
IN3
IN4
A3916
OUT1A
OUT1B
DC
Motor
FAULTn
SENSE1
OUT2A
OUT2B
OUT2A
FAULTn
SENSE1
Step
Motor
DC
Motor
GND
SENSE2
OUT2B
GND
SENSE2
Figure 1: Typical Applications
A3916-DS, Rev. 3
MCO-0000139
January 19, 2018
A3916
Dual DMOS Full-Bridge Motor Driver
sPECIFICATIONs
sElECTION GUIDE
Part Number
A3916GESTR-T
A3916GESTR-T-1
Packaging
3 × 3 mm 16-contact QFN package
4 × 4 mm 20-contact QFN package
Packing
1500 pieces per 7-inch reel
1500 pieces per 7-inch reel
ABsOlUTE MAxIMUM RATINGs
Characteristic
Supply Voltage
Output Current
Output Current (parallel mode)
Sense Voltage
Logic Input Voltage Range
Junction Temperature
Storage Temperature Range
Operating Temperature Range
symbol
V
BB
I
OUT
I
OUT(PAR)
V
SENSEx
V
IO
T
J(MAX)
T
stg
T
A
Range G
Continuous
Continuous
Continuous
Pulsed, t
w
< 1 µs
Notes
Rating
15
1.0
1.8
0.5
2.5
–0.3 to 5.5
150
–55 to 150
–40 to 105
Unit
V
A
A
V
V
V
°C
°C
°C
ThERMAl ChARACTERIsTICs
:
May require derating at maximum conditions; see application information
Characteristic
3 × 3 mm ES package
4 × 4 mm ES-1 package
*Additional thermal information available on the Allegro website.
symbol
R
θJA
Test Conditions*
4-layer PCB based on JEDEC standard
4-layer PCB based on JEDEC standard
Value
47
37
Unit
°C/W
°C/W
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
2
A3916
Dual DMOS Full-Bridge Motor Driver
PINOUT DIAGRAMs AND TERMINAl lIsT TABlE
16
15
14
13
16 OUT1A
SENSE1
17 VCP
OUT1A
20 NC
19 NC
18 NC
VCP
NC
GND
SLEEPn
IN1
IN2
1
2
3
4
5
6
7
8
PAD
12 OUT1B
11
9
VBB
SENSE2
10 OUT2B
NC
GND
SLEEPn
IN1
IN2
1
2
3
4
5
OUT2A 10
6
7
8
9
PAD
15
14
13
12
11
SENSE1
OUT1B
VBB
OUT2B
SENSE2
FAULTn
OUT2A
IN3
IN4
IN3
IN4
FAULTn
16-Contact QFN (Es) Package
20-Contact QFN (Es, -1) Package
Terminal list Table
Number
Es
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
–
Es, -1
2
3
4
5
6
7
8
10
11
12
13
14
15
16
17
1,9,18,19,20
–
Name
GND
SLEEPn
IN1
IN2
IN3
IN4
FAULTn
OUT2A
SENSE2
OUT2B
VBB
OUT1B
SENSE1
OUT1A
VCP
NC
PAD
Ground
Active-Low Sleep Input
Control Input
Control Input
Control Input
Control Input
Open-Drain Logic Output
DMOS H-Bridge 2, Output A
Sense Resistor Terminal, Bridge 2
DMOS H-Bridge 2, Output B
Motor Supply Voltage
DMOS H-Bridge 1, Output B
Sense Resistor Terminal, Bridge 1
DMOS H-Bridge 1, Output A
Charge Pump Capacitor
No Internal Connection
Exposed Pad for Enhanced Thermal Performance
Function
NC
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
3
A3916
Dual DMOS Full-Bridge Motor Driver
FUNCTIONAl BlOCK DIAGRAM
TSD
VBB
CHARGE PUMP
VREG
DMOS H BRIDGE
VBB
VCP
0.1 µF
VBB
2.7 to 15 V
UVLO
SLEEPn
IN1
IN2
CLK
IN3
IN4
Control
Logic
OUT1A
OUT1B
DC
Motor
SENSE1
VBB
DMOS H BRIDGE
+ -
FAULTn
200 mV
OUT2A
OUT2B
DC
Motor
- +
GND
SENSE2
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
4
A3916
Dual DMOS Full-Bridge Motor Driver
ElECTRICAl ChARACTERIsTICs
[1][2]
:
Valid at T
J
= 25°C, V
BB
= 2.7 to 15 V, unless noted otherwise
Characteristics
GENERAl
Load Supply Voltage Range
V
BB
Operating
T
J
= 25°C, 500 mA, V
BB
= 5 V
R
DS(ON,HS)
Output On Resistance
R
DS(ON,LS)
T
J
= 25°C, 500 mA, V
BB
= 2.7 V
T
J
= 85°C, 500 mA, V
BB
= 5 V
T
J
= 85°C, 500 mA, V
BB
= 2.7 V
T
J
= 25°C, 500 mA, V
BB
= 5 V
T
J
= 25°C, 500 mA, V
BB
= 2.7 V
T
J
= 85°C, 500 mA, V
BB
= 5 V
T
J
= 85°C, 500 mA, V
BB
= 2.7 V
Diode Forward Voltage
VBB Supply Current
CONTROl lOGIC
Logic Input Voltage, INx
Logic Input Voltage, SLEEPn
Logic Input Hysteresis
Logic Input Current
Fault Output Voltage
Fault Output Leakage Current
V
SENSE
Blank time
V
SENSE
Trip Voltage
Fixed Off-Time
PROTECTION CIRCUITs
Crossover Delay
VBB Undervoltage Lockout
VBB Hysteresis
Thermal Shutdown Temperature
Thermal Shutdown Hysteresis
[1]
[2]
symbol
Test Conditions
Min.
2.7
–
–
–
–
–
–
–
–
–
–
–
–
2.0
–
2.0
–
100
Typ.
–
335
335
410
410
375
375
455
455
0.85
2.2
3.1
–
–
–
–
–
–
33
–
–
3.1
205
30
550
2.55
125
165
20
Max.
15
450
450
–
–
525
525
–
–
1.0
4.5
4.5
0.5
–
0.8
–
0.4
500
50
200
1.0
4.1
240
40
1000
2.65
–
180
–
Unit
V
mΩ
mΩ
mΩ
mΩ
mΩ
mΩ
mΩ
mΩ
V
mA
mA
µA
V
V
V
V
mV
µA
mV
µA
µs
mV
µs
ns
V
mV
°C
°C
V
F
I
BB(2p7V)
I
BB(15V)
I
BB(SLEEP)
V
IN(1)
V
IN(0)
V
IN(1)
V
IN(0)
V
HYS
I
IN
V
FAULTn
I
FAULTn
t
BLANK
V
TRIP
t
OFF
t
OCD
V
BB(UVLO)
V
BB(UVLO,HYS)
T
J1
ΔT
J1
I = 500 mA
Outputs disabled, V
BB
= 2.7 V
Outputs disabled, V
BB
= 15 V
Sleep Mode
V
IN
= 3.3 V, pulldown = 100 kΩ
Flag asserted, I
FAULTn
= 1 mA
V
FAULTn
= 5 V
–
–
–
2.1
170
20
200
V
BB
rising
–
–
150
–
Typical data is for design information only.
Specified limits are tested at a single temperature and assured over operating temperature range by design and characterization.
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
5
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