3977 データシートの表示（PDF） - Allegro MicroSystems

部品番号

コンポーネント説明

メーカー

3977

MICROSTEPPING DMOS DRIVER WITH TRANSLATOR

Allegro MicroSystems 

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

www.allegromicro.com

3

Share Link: