A3980 Datasheet, PDF (18/19 Pages) Allegro MicroSystems – Automotive DMOS Microstepping Driver with Translator

A3980
Automotive DMOS Microstepping Driver
with Translator
Pin-out Diagram
SENSE1 1
SR 2
DIR 3
OUT1A 4
PFD 5
RC1 6
AGND 7
REF 8
÷8
RC2 9
VDD 10 VDD
OUT2A 11
MS2 12
MS1 13
SENSE2 14
VBB1 28 VBB1
27 SLEEP
26 ENABLE
25 OUT1B
24 CP2
23 CP1
22 VCP
21 PGND
Reg 20 ^VREG
19 STEP
18 OUT2B
17 FF2
16 FF1
VBB2 15 VBB2
Terminal List Table
Name
Description
SENSE1 Sense resistor for full-bridge 1
SR
Enable synchronous rectification
DIR
Logic input
OUT1A Output A for for full-bridge 1
PFD
Mixed decay setting
RC1
Analog input for fixed off-time for full-bridge 1
AGND Analog ground
REF
Current trip reference voltage input
RC2
Analog input for fixed off-time for full-bridge 2
VDD Logic supply voltage
OUT2A Output A for for full-bridge 2
MS2 Logic input
MS1 Logic input
SENSE2 Sense resistor for full-bridge 2
VBB2 Load supply 2
FF1
Fault flag 1
FF2
Fault flag 2
OUT2B Output B for for full-bridge 2
STEP Logic input
VREG Regulator decoupling
PGND Power ground
VCP Reservoir capacitor
CP1
Charge pump capacitor 1
CP2
Charge pump capacitor 2
OUT1B Output B for for full-bridge 1
ENABLE Logic input
SLEEP Logic input
VBB1 Load supply 1
Number
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
Allegro MicroSystems, Inc.
17
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com