a8904 Allegro MicroSystems, Inc., a8904 Datasheet - Page 3
a8904
Manufacturer Part Number
a8904
Description
3-phase Brushless Dc Motor Controller/driver With Back Emf Sensing
Manufacturer
Allegro MicroSystems, Inc.
Datasheet
1.A8904.pdf
(18 pages)
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A8904
CENTERTAP
GROUND
GROUND
SUPPLY
BRAKE
OUT C
OUT B
OUT A
C RES
C WD
LOAD
C D2
C ST
12
10
11
8
9
1
2
3
4
5
6
7
9
V
BB
LB Package
CHARGE
BOOST
PUMP
COMMUTATION
DELAY
MUX
FLL
V
DD
3-Phase Brushless DC Motor Controller/Driver
24
21
17
23
22
20
19
16
13
18
15
14
C D1
DATA IN
CLOCK
CHIP SELECT
RESET
GROUND
DATA OUT
LOGIC
SUPPLY
INDEX
FILTER
GROUND
OSCILLATOR
Copyright © 2003 Allegro MicroSystems, Inc.
Pin-out Diagrams
with Back EMF Sensing
LP Package
Allegro MicroSystems, Inc.
115 Northeast Cutoff
1.508.853.5000; www.allegromicro.com
Worcester, Massachusetts 01615-0036 U.S.A.
3
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