Dual Full Bridge Motor Driver
A3909
2
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
Pin-out Diagram
Absolute Maximum Ratings*
Characteristic Symbol Notes Rating Unit
Supply Voltage V
BB
18 V
Logic Input Voltage Range V
IN
–0.3 to 6 V
Output Current I
OUT
1V
Output Voltage V
OUT
–0.3 to V
BB
+ 1 V
Operating Ambient Temperature T
A
G temperature range –40 to 105 ºC
Maximum Junction Temperature T
J
(max) 150 ºC
Storage Temperature T
stg
–55 to 150 ºC
Terminal List Table
Number Name Function
1 IN1 Logic input
2 IN2 Logic input
3 VBB Input supply
4 IN3 Logic input
5 IN4 Logic input
6 OUT4 Motor terminal
7 OUT3 Motor terminal
8 GND Ground
9 OUT2 Motor terminal
10 OUT1 Motor terminal
– PAD (LY package) Exposed thermal pad
Thermal Characteristics may require derating at maximum conditions, see application information
Characteristic Symbol Test Conditions* Value Unit
Package Thermal Resistance
R
θJA
LN package (estimated), on 1-layer PCB with copper limited
to pin area
130 ºC/W
LY package, on 2-layer PCB with 2.260 in.
2
of copper area
each side
48 ºC/W
*Additional thermal information available on the Allegro website.
Selection Guide
Part Number Package Packing
A3909GLNx-T* 10-pin SSOP 3000 pieces per 13-in. reel
A3909GLYTR-T
10-pin MSOP with
exposed thermal pad
4000 pieces per 13-in. reel
*Contact Allegro Sales for availability of this package option.
IN1
IN2
VBB
IN3
IN4
OUT1
OUT2
GND
OUT3
OUT4
1
2
3
4
5
10
9
8
7
6
PAD
(LY
package)
LN and LY packages
