A4931
3-Phase Brushless DC Motor Pre-Driver
ET Package, 28-Contact QFN
0.30
5.00 ±0.15
0.50
1.15
28
28
1
2
1
A
5.00 ±0.15
3.15 4.80
3.15
4.80
D
29X
C
SEATING
PLANE
0.08
C
C
PCB Layout Reference View
+0.05
–0.07
0.25
0.90 ±0.10
0.50
For Reference Only
(reference JEDEC MO-220VHHD-1)
Dimensions in millimeters
Exact case and lead configuration at supplier discretion within limits shown
+0.20
–0.10
0.55
A
B
B
Terminal #1 mark area
3.15
Exposed thermal pad (reference only, terminal #1
identifier appearance at supplier discretion)
2
1
C
Reference land pattern layout (reference IPC7351
QFN50P500X500X100-29V1M);
All pads a minimum of 0.20 mm from all adjacent pads; adjust as
necessary to meet application process requirements and PCB layout
tolerances; when mounting on a multilayer PCB, thermal vias at the
exposed thermal pad land can improve thermal dissipation (reference
EIA/JEDEC Standard JESD51-5)
28
3.15
D
Coplanarity includes exposed thermal pad and terminals
Copyright ©2007-2008, Allegro MicroSystems, Inc.
The products described here are manufactured under one or more U.S. patents or U.S. patents pending.
Allegro MicroSystems, Inc. reserves the right to make, from time to time, such departures from the detail specifications as may be required to per-
mit improvements in the performance, reliability, or manufacturability of its products. Before placing an order, the user is cautioned to verify that the
information being relied upon is current.
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failure of that life support device or system, or to affect the safety or effectiveness of that device or system.
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nor for any infringement of patents or other rights of third parties which may result from its use.
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Allegro MicroSystems, Inc.
115 Northeast Cutoff
9
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
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