8906 データシートの表示（PDF） - Allegro MicroSystems

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8906

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

Allegro MicroSystems 

8906

BIDIRECTIONAL

3-PHASE BRUSHLESS DC

MOTOR CONTROLLER/DRIVER

ELECTRICAL CHARACTERISTICS continued

Characteristic

CWD Current

CWD Threshold Voltage

Max. FLL Oscillator Frequency

IOUT(MAX)

Symbol

ICWD

VTL

VTH

fOSC

—

BRAKE Threshold

BRAKE Hysteresis Current

Transconductance Gain

Centertap Resistors

Back-EMF Hysteresis

VBRK

IBRKL

gm

RCT

—

Charging

Test Conditions

VDD = 5.0 V, TA = 25°C

D3 = 0, D4 = 0

D3 = 0, D4 = 1

D3 = 1, D4 = 0

D3 = 1, D4 = 1

VBRK = 750 mV

VBEMF - VCTAP at

FCOM Transition

SERIAL PORT TIMING CONDITIONS

Min.

-9.0

0.22

2.25

12

1.0

0.9

0.5

—

1.5

—

0.42

5.0

5.0

-5.0

Limits

Typ. Max.

-10 -11

0.25 0.28

2.5 2.75

—

—

1.2

1.4

1.0

1.1

0.6

0.7

250

—

1.75 2.0

20

—

0.50 0.58

10

13

20

37

-20 -37

Units

µA

V

V

MHz

A

A

A

mA

V

µA

A/V

kΩ

mV

mV

CHIP SELECT

CLOCK

DATA

EA

C

D

B

C

D

Dwg. WP-019

A. Minimum CHIP SELECT setup time before CLOCK rising edge .......... 100 ns

B. Minimum CHIP SELECT hold time after CLOCK rising edge ............... 150 ns

C. Minimum DATA setup time before CLOCK rising edge ........................ 150 ns

D. Minimum DATA hold time after CLOCK rising edge ............................. 150 ns

E. Minimum CLOCK low time before CHIP SELECT .................................. 50 ns

F. Maximum CLOCK frequency .............................................................. 3.3 MHz

115 Northeast Cutoff, Box 15036

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

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