A3931 Allegro MicroSystems, Inc., A3931 Datasheet - Page 18

• Manufacturer Part Number: A3931
• Description: Automotive 3-Phase BLDC Controller and MOSFET Driver
• Manufacturer: Allegro MicroSystems, Inc.

A3930
A3931
6.
The above are only recommendations. Each application is differ-
ent and may encounter different sensitivities. A driver running
with a few amperes will be less susceptible than one running with
150 A, and each design should be tested at the maximum current,
to ensure any parasitic effects are eliminated.
Figure 3. Supply and Ground Connections
Subject to Change Without Notice
Preliminary Data Sheet
to limit fast transient voltage spikes caused by trace induc-
tance.
Ensure that the TEST pin is connected to AGND. This pin is
used for production test only.
April 6, 2006
and
Controller Supply Ground
Quiet Ground
VREG
V5
RC
VDSTH
RDEAD
AGND
VBB
A3930
A3931
VDRAIN
GHC
GHB
GHA
GLA
GLB
GLC
LSS
SC
SA
SB
Automotive 3-Phase BLDC Controller
Optional components
to limit LSS transients
Power Ground
RSENSE
and MOSFET Driver
115 Northeast Cutoff, Box 15036
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 [phone]
www.allegromicro.com
+ Supply
Supply
Common
Motor
18