A3981 データシートの表示（PDF） - Allegro MicroSystems

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A3981

Automotive, Programmable Stepper Driver

Allegro MicroSystems 

A3981

Automotive, Programmable Stepper Driver

ELECTRICAL CHARACTERISTICS1,2 Valid at TJ = –40°C to 150°C, VBB = 7 to 28 V, VDD = 3 to 5.5 V; unless otherwise noted

Characteristics

Symbol

Test Conditions

Min.

Typ.

Max.

Unit

Supplies

Load Supply Voltage Range3

Load Supply Quiescent Current

Functional

VBB

Outputs Driving

ENABLE = 0

IBBQ

Sleep mode

0

–

50

V

7

–

VBBOV

V

–

–

4

mA

–

1

10

μA

Logic Supply Voltage Range

VDD

ENABLE = 0

3

–

5.5

V

–

–

5

mA

Logic Supply Quiescent Current

Charge Pump Voltage

IDDQ

ENABLE=0, VDD > 5 V

Sleep mode, VDD = 3.3 V

–

–

Sleep mode, VDD = 5 V

–

VCP

With repect to VBB, VBB >7.5 V, ENABLE = 0,

RESETn = 1

–

–

5.5

mA

4

15

μA

–

25

μA

6.7

–

V

Internal Regulator Voltage

Internal Regulator Dropout Voltage

Motor Bridge Output

VREG

VREGDO

ENABLE = 0, RESETn = 1, VBB > 7.5 V

ENABLE = 0, RESETn = 1, VBB > 5.6 V

–

7.2

–

V

–

100

200

mV

High-Side On-Resistance

High-Side Body Diode Forward

Voltage

RONH

VFH

VBB = 13.5 V, IOUT = –1 A, TJ = 25°C

VBB = 13.5 V, IOUT = –1 A, TJ = 150°C

VBB = 7 V, IOUT = –1 A, TJ = 25°C

IF = 1 A

–

500

600

mΩ

–

900

1100

mΩ

–

625

750

mΩ

–

–

1.4

V

Low-Side On-Resistance

Low-Side Body Diode Forward

Voltage

RONL

VFL

VBB = 13.5 V, IOUT = 1 A, TJ = 25°C

VBB = 13.5 V, IOUT = 1 A, TJ = 150°C

VBB = 7 V, IOUT = 1 A, TJ = 25°C

IF = –1 A

–

500

600

mΩ

–

900

1100

mΩ

–

625

750

mΩ

–

–

1.4

V

Output Leakage Current

Current Control

ENABLE = 0, RESETn = 1, VO = VBB

ILO

ENABLE = 0, RESETn = 1, VO = 0 V

ENABLE = 0, RESETn = 0, VO = VBB

ENABLE = 0, RESETn = 0, VO = 0 V

–120

–65

–

μA

–200

–120

–

μA

–

<1.0

20

μA

–20

<1.0

–

μA

Internal Oscillator Frequency

OSC = AGND

fOSC

51 kΩ from OSC to VDD

3.2

4

4.8

MHz

3.6

–

4.4

MHz

External Oscillator Frequency Range

Blank Time4

Off-Time (In Fixed Off-Time Mode)4

PWM Frequency (In Fixed Frequency

Mode)4

fEXT

tBLANK

tOFF

fPWM

Default Blank-Time

Default Off-Time

Default PWM Frequency

3

–

5

MHz

–

1500

–

ns

–

44

–

μs

–

16.7

–

kHz

Continued on the next page…

Allegro MicroSystems, LLC

4

115 Northeast Cutoff

Worcester, Massachusetts 01615-0036 U.S.A.

1.508.853.5000; www.allegromicro.com

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