A3910
Dual Half Bridge Motor Driver
Features and Benefits
• Low R
DS(on)
outputs
• Standby mode with zero current drain
• Small 2 × 2 DFN package
• Crossover Current protection
• Thermal Shutdown protection
Description
The A3910 is a dual half bridge motor driver, designed for
low cost, low voltage battery operated power applications.
The outputs are rated for operation up to 500 mA.
Direct control of high- and low-side drivers is implemented
to allow either high-side or low-side PWM. The motor can
be connected to either supply or GND. Using a MOS switch
results in improved braking action for the motor, compared to
implementation with simple clamp diode.
The A3910 is supplied in a 2 mm × 2 mm 8-contact DFN
package (EE) with exposed thermal pad. The package is lead
(Pb) free, with 100% matte tin leadframe plating.
Package: 8-contact DFN with Exposed
Thermal Pad (suffix EE)
Not to scale
Typical Application Diagram
V
SUPPLY
V
SUPPLY
System
Controller
A3910
M
System
Controller
A3910
M
M
M
(A) Connection to Supply
(B) Connection to Ground
A3910-DS
A3910
Dual Half Bridge Motor Driver
Selection Guide
Part Number
A3910EEETR-T
Packing*
3000 pieces per 13-in. reel
Package
8-contact DFN
with exposed thermal pad
*Contact Allegro
™
for additional packing options.
Absolute Maximum Ratings*
Characteristic
Supply Voltage
Logic Input Voltage Range
Output Current
Output Voltage
Operating Ambient Temperature
Maximum Junction Temperature
Storage Temperature
Symbol
V
BB
V
IN
I
OUT
V
OUT
T
A
T
J
(max)
T
stg
E temperature range
Notes
Rating
–0.3 to 5.5
–0.3 to 6
500
–0.3 to V
BB
+ 1
–40 to 85
150
–55 to 150
Unit
V
V
mA
V
ºC
ºC
ºC
Thermal Characteristics
may require derating at maximum conditions, see application information
Characteristic
Package Thermal Resistance
Symbol
R
θJA
Test Conditions*
On 4-layer PCB based on JEDEC standard
On 2-layer PCB based with 0.23 in.
2
exposed
copper each side
Value
49
92
Unit
ºC/W
ºC/W
*Additional thermal information available on the Allegro website.
Terminal List Table
Number
Name
HIN1
LIN1
LIN2
HIN2
OUT2
GND
VBB
OUT1
Function
Logic input
Logic input
Logic input
Logic input
Motor terminal
Ground
Input Supply
Motor terminal
Pin-out Diagram
HIN1 1
LIN1 2
LIN2 3
HIN2 4
PAD
8
7
6
5
OUT1
VBB
GND
OUT2
1
2
3
4
5
6
7
8
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
2
A3910
Dual Half Bridge Motor Driver
Functional Block Diagram
VBB
HIN1
VBB
OUT1
LIN1
Gate Drive
Supply
V
IN
= 3 V typ
(Option:
VBB or GND)
Sleep
Mode
Disable
GND
TSD
TSD
VBB
HIN2
VBB
LIN2
Disable
VBB
Gate
Drive
OUT2
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
3
A3910
Dual Half Bridge Motor Driver
ELECTRICAL CHARACTERISTICS*
Valid at T
A
= 25°C; unless otherwise specified
Characteristic
VBB Supply Range
VBB Supply Current
Symbol
V
BB
I
BB
Both bridges, PWM = 50 kHz
Sleep mode (HIN1 = HIN2 = LIN1 = LIN2 = 0 V)
Source driver, I = 400 mA, V
BB
= 3 V
Output Driver On-Resistance
R
DS(on)
Source driver, I = 400 mA, V
BB
= 5 V
Sink driver, I = 400 mA, V
BB
= 3 V
Sink driver, I = 400 mA, V
BB
= 5 V
Input Logic Low Level
Input Logic High Level
Input Hysteresis
Logic Input Current
Thermal Shutdown Temperature
Thermal Shutdown Hysteresis
V
IL
V
IH
V
HYS
I
IN
T
JTSD
ΔT
J
V
IN
= 3.3 V (Pulldown = 100 kΩ)
Temperature increasing
Recovery = T
JTSD
–
ΔT
J
Test Conditions
Min.
2.5
–
–
–
–
–
–
–
V
BB
/ 2
50
–
–
–
Typ.
–
0.3
<1
1.1
0.8
0.5
0.4
–
–
150
33
165
15
Max.
5.5
1
1
1.4
1
0.65
0.52
0.5
–
300
50
–
–
Unit
V
mA
μA
Ω
Ω
Ω
Ω
V
V
mV
μA
°C
°C
*Specified limits are tested at a single temperature and assured over operating temperature range by design and characterization.
Logic Table
HINx
0
1
0
1
1
Hi-Z
2
Sleep
LINx
0
0
1
1
OUTx
Hi-Z
1
High
Low
Hi-Z
1
Function Motor to Supply
Coast (Sleep
2
)
Brake
Drive
Coast
Function Motor to GND
Coast (Sleep
2
)
Drive
Brake
Coast
is high impedance.
mode activated by all four inputs <100 mV.
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
4
A3910
Dual Half Bridge Motor Driver
Characteristic Performance
Output On-Resistance versus Load Supply Voltage
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
Source = 500 mA
Source = 100 mA
Sink = 500 mA
Sink = 100 mA
R
DS(on)
(Ω)
V
BB
(V)
Output On-Resistance versus Output Current
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
100
200
300
400
500
Source = 3 V
Source = 5 V
Sink =3 V
Sink = 5 V
R
DS(on)
(Ω)
I
OUT
(mA)
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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