A3977(2013) Ver la hoja de datos (PDF) - Allegro MicroSystems

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componentes Descripción

Fabricante

A3977
(Rev.:2013)

Microstepping DMOS Driver with Translator

Allegro MicroSystems 

A3977

Microstepping DMOS Driver with Translator

ELECTRICAL CHARACTERISTICS at TA = +25°C, VBB = 35 V, VDD = 3.0 V to 5.5V (unless otherwise noted)

Characteristic

Symbol

Test Conditions

Min.

Output Drivers

Operating

8.0

Load Supply Voltage Range

VBB

During sleep mode

0

Output Leakage Current

IDSS

VOUT = VBB

VOUT = 0 V

–

–

Output On Resistance

rDS(on)

Source driver, IOUT = -2.5 A

Sink driver, IOUT = 2.5 A

–

–

Body Diode Forward Voltage

VF

Source diode, IF = -2.5 A

Sink diode, IF = 2.5 A

–

–

fPWM < 50 kHz

–

Motor Supply Current

IBB

Operating, outputs disabled

–

Sleep mode

–

Control Logic

Logic Supply Voltage Range

Logic Input Voltage

Logic Input Current

Maximum STEP Frequency

HOME Output Voltage

Blank Time

Fixed Off Time

Mixed Decay Trip Point

VDD

VIN(1)

VIN(0)

IIN(1)

IIN(0)

fSTEP

VOH

VOL

tBLANK

toff

PFDH

PFDL

Operating

VIN = 0.7VDD

VIN = 0.3VDD

IOH = -200 μA

IOL = 200 μA

Rt = 56 kΩ, Ct = 680 pF

Rt = 56 kΩ, Ct = 680 pF

3.0

0.7VDD

–

-20

-20

500*

0.7VDD

–

700

30

–

–

Ref. Input Voltage Range

Reference Input Current

Gain (Gm) Error (note 3)

Crossover Dead Time

VREF Operating

0

IREF

–

VREF = 2 V, Phase Current = 38.27%

–

EG

VREF = 2 V, Phase Current = 70.71%

–

VREF = 2 V, Phase Current = 100.00%

–

tDT SR enabled

100

Typ.

–

–

<1.0

<1.0

0.45

0.36

–

–

–

–

–

5.0

–

–

<1.0

<1.0

–

–

–

950

38

0.6VDD

0.21VDD

–

0

–

–

–

475

Max.

35

35

20

-20

0.57

0.43

1.4

1.4

8.0

6.0

20

5.5

–

0.3VDD

20

20

–

–

0.3VDD

1200

46

–

–

VDD

±3.0

±10

±5.0

±5.0

800

Units

V

V

μA

μA

Ω

Ω

V

V

mA

mA

μA

V

V

V

μA

μA

kHz

V

V

ns

μs

V

V

V

μA

%

%

%

ns

Continued on the next page…

Allegro MicroSystems, LLC

5

115 Northeast Cutoff

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

1.508.853.5000; www.allegromicro.com

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