A3931 Allegro MicroSystems, Inc., A3931 Datasheet - Page 20

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

A3930
A3931
Terminal List Table
Subject to Change Without Notice
Preliminary Data Sheet
Number
10
12
13
14
15
16
17
18
19
20
21
22
23
24
11
1
2
3
4
5
6
7
8
9
April 6, 2006
VDRAIN High-side drain voltage sense
RDEAD
CSOUT
RESET
TACHO
BRAKE
VDSTH
MODE
and
V5BD
TEST
Name
PWM
CSN
N.C.
N.C.
REF
CSP
FF2
FF1
DIR
RC
V5
H1
H2
H3
No connection
Control for sleep mode
5V regulator base drive
5V regulator reference
Fault flag 2
Fault flag 1
Speed output
Brake input
Direction control input
Hall sensor input
Hall sensor input
Hall sensor input
No connection
Control input
Decay control input
PWM oscillator control input
Test pin; tie to AGND
Dead time setting
Current sense output
Current limit setting
Current sense input –
Current sense input +
Fault threshold voltage
Description
COAST
AGND
VREG
DIRO
VBB
LSS
ESF
CP1
CP2
NC
NC
NC
37
38
39
40
41
42
43
44
45
46
47
48
Drives
Side
Pin-out Diagrams
Low
Charge
Pump
JP Package
Automotive 3-Phase BLDC Controller
High-Side Drives
Bootstrapped
Control
Logic
Number
Current
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
Sense
Hall
COAST
AGND
VREG
DIRO
24
23
22
21
20
19
18
17
16
15
14
13
Name
GHC
GHB
GHA
GLC
GLB
GLA
N.C.
ESF
CP1
CP2
VBB
N.C.
N.C.
LSS
SC
CC
CB
SB
SA
CA
VDRAIN
VDSTH
CSP
CSN
REF
CSOUT
RDEAD
TEST
RC
MODE
PWM
NC
and MOSFET Driver
Motor connection phase C
High-side gate drive phase C
Bootstrap capacitor phase C
Motor connection phase B
High-side gate drive phase B
Bootstrap capacitor phase B
Motor connection phase A
High-side gate drive phase A
Bootstrap capacitor phase A
Low-side gate drive phase C
Low-side gate drive phase B
Low-side gate drive phase A
No connection
Low-side source
Enable stop on fault input
Gate drive supply output
Analog ground
Pump capacitor
Pump capacitor
Direction output
Supply voltage
Coast input
No connection
No connection
115 Northeast Cutoff, Box 15036
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 [phone]
www.allegromicro.com
Description
20