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A3977KLP Datasheet(PDF) 3 Page - Allegro MicroSystems

Part # A3977KLP
Description  MICROSTEPPING DMOS DRIVER WITH TRANSLATOR
PDF  18 Pages
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Manufacturer  ALLEGRO [Allegro MicroSystems]
Direct Link  http://www.allegromicro.com
Logo ALLEGRO - Allegro MicroSystems

A3977KLP Datasheet(HTML) 3 Page - Allegro MicroSystems

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3977
MICROSTEPPING DMOS DRIVER
WITH TRANSLATOR
www.allegromicro.com
3
Table 1. Microstep Resolution Truth Table
MS1
MS2
Resolution
L
L
Full step (2 phase)
H
L
Half step
L
H
Quarter step
H
H
Eighth step
A3977xLP
(TSSOP)
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
LOAD
SUPPLY1
SLEEP
ENABLE
OUT1B
CP2
CP1
VCP
PGND
VREG
STEP
OUT2B
RESET
SR
LOAD
SUPPLY2
SENSE1
HOME
DIR
OUT1A
PFD
RC1
AGND
REF
RC2
LOGIC
SUPPLY
OUT2A
MS2
MS1
SENSE2
÷8
REG
VBB2
VBB1
VDD
Dwg. PP-075
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.
50
75
100
125
150
5.0
1.0
0
AMBIENT TEMPERATURE IN
°°°°C
4.0
3.0
2.0
25
SUFFIX '–LP',
R
θJA = 33
°C/W†
Dwg. GP-018-2A
SUFFIX '–ED', R
θJA = 32
°C/W†
SUFFIX '–LP', R
θJA = 28
°C/W*
SUFFIX 'K–'
SUFFIX 'S–'



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