8906 View Datasheet(PDF) - Allegro MicroSystems

Part Name

Description

Manufacturer

8906

BIDIRECTIONAL 3-PHASE BRUSHLESS DC MOTOR CONTROLLER/DRIVER WITH BACK-EMF SENSING

Allegro MicroSystems 

8906

BIDIRECTIONAL

3-PHASE BRUSHLESS DC

MOTOR CONTROLLER/DRIVER

OUT A

OUT B

OUT C

CENTERTAP 10

FUNCTIONAL BLOCK DIAGRAM

LOGIC

SUPPLY

15

VDD

C D1

24

C D2 C ST BRAKE

2

4

11

BRAKE

FCOM COMMUTATION

DELAY

START-UP

OSC.

BLANK

C RES

12

BOOST

CHARGE

PUMP

VBB

1

LOAD

SUPPLY

5 OUT A

8 OUT B

9 OUTC

C WD 3

SECTOR

DATA 14

OSC 16

FREQUENCY-

LOCKED LOOP

WATCHDOG

TIMER

CHARGE

PUMP

CURRENT

CONTROL RS

DATA IN 23

SERIAL PORT

MUX

TSD

6-7 GROUND

21

22

20

17

13

FILTER

18-19 GROUND

Dwg. FP-034

2.5

RθJT = 6°C/W

2.0

1.5

R θJA = 55°C/W

1.0

0.5

0

25

50

75

100

125

150

TEMPERATURE in °C

Dwg. GP-019B

115 Northeast Cutoff, Box 15036

Worcester, Massachusetts 01615-0036 (508) 853-5000

Copyright © 1999 Allegro MicroSystems, Inc.

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