A3985 Allegro MicroSystems, Inc., A3985 Datasheet - Page 14

• Manufacturer Part Number: A3985
• Description: Digitally Programmable Dual Full-Bridge MOSFET Driver
• Manufacturer: Allegro MicroSystems, Inc.

A3985
Pin-out Diagram
Terminal List Table
Number
10
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
11
1
2
3
4
5
6
7
8
9
SENSE1
ENABLE
SENSE2
VREG
Name
GH2A
GH1A
GH1B
GH2B
GL2A
GL1A
GL1B
LSS1
LSS2
GL2B
SENSE1
ENABLE
GND
OSC
SDO
VBB
REF
VDD
SCK
STR
C2A
C1A
C1B
S1B
S2B
C2B
S2A
S1A
SDI
WC
NC
NC
NC
NC
NC
NC
VREG
GH2A
GH1A
GH1B
GL2A
GL1A
GL1B
LSS1
C2A
VBB
C1A
C1B
S2A
S1A
S1B
NC
NC
10
11
12
13
14
15
16
17
18
19
1
2
3
4
5
6
7
8
9
Phase 2 bootstrap capacitor drive A connection
Phase 2 high-side gate drive A
Phase 2 motor connection A
Phase 2 low-side gate drive A
No internal connection
Regulator decoupling capacitor connection
Motor supply voltage
Phase 1 low-side gate drive A
Phase 1 motor connection A
Phase 1 high-side gate drive A
Phase 1 bootstrap capacitor drive A connection
Phase 1 bootstrap capacitor drive B connection
Phase 1 high-side gate drive B
Phase 1 motor connection B
Phase 1 low-side gate drive B
Phase 1 low-side source connection
Phase 1 bridge current sense input
No internal connection
Output enable
Ground
Reference voltage
No internal connection
External clock input, ROSC resistor connection
No internal connection
Logic supply voltage
No internal connection
Serial Data Clock
Serial Data Strobe
Serial Data Input
Serial Data Output
Write Configuration Enable
Phase 2 bridge current sense input
Phase 2 low-side source connection
No internal connection
Phase 2 low-side gate drive B
Phase 2 motor connection B
Phase 2 high-side gate drive B
Phase 2 bootstrap capacitor drive B connection
Bridge 2
Bridge 1
Control
Control
Dual Full-Bridge MOSFET Driver
Interface
Serial
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
Description
C2B
GH2B
S2B
GL2B
NC
LSS2
SENSE2
WC
SDO
SDI
STR
SCK
NC
VDD
NC
OSC
NC
REF
GND
Digitally Programmable
115 Northeast Cutoff, Box 15036
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 [phone]
www.allegromicro.com
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