A3977KLP View Datasheet(PDF) - Allegro MicroSystems
Part Name
Description
MFG CO.
'A3977KLP' PDF : 18 Pages View PDF
A3977xLP
(TSSOP)
SENSE1 1
HOME 2
DIR 3
OUT1A 4
PFD 5
RC1 6
AGND 7
REF 8
÷8
RC2 9
LOGIC
SUPPLY
10 VDD
OUT2A 11
MS2 12
MS1 13
SENSE2 14
VBB1
28
LOAD
SUPPLY1
27 SLEEP
26 ENABLE
25 OUT1B
24 CP2
23 CP1
22 VCP
21 PGND
REG
20 VREG
19 STEP
18 OUT2B
17 RESET
16 SR
VBB2 15
LOAD
SUPPLY2
Dwg. PP-075
3977
MICROSTEPPING DMOS DRIVER
WITH TRANSLATOR
5.0
SUFFIX '–LP', RθJA = 28°C/W*
4.0
3.0
SUFFIX '–LP',
RθJA = 33°C/W†
2.0
SUFFIX '–ED', RθJA = 32°C/W†
1.0
SUFFIX 'S–'
SUFFIX 'K–'
0
25
50
75
100
125
150
AMBIENT TEMPERATURE IN °C
Dwg. GP-018-2A
Package Thermal Resistance, RθJA
A3977xLP ......................... 28°C/W*
A3977xED ........................ 32°C/W†
A3977xLP ......................... 33°C/W†
* Measured on JEDEC standard “High-K” four-layer board.
† Measured on typical two-sided PCB with three square inches
(1935 mm2) copper ground area.
Table 1. Microstep Resolution Truth Table
MS1
L
MS2
L
H
L
L
H
H
H
Resolution
Full step (2 phase)
Half step
Quarter step
Eighth step
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