A4984 데이터 시트보기 (PDF) - Allegro MicroSystems

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A4984

DMOS Microstepping Driver with Translator And Overcurrent Protection

Allegro MicroSystems 

A4984

DMOS Microstepping Driver with Translator

And Overcurrent Protection

ELECTRICAL CHARACTERISTICS1 at TA = 25°C, VBB = 35 V (unless otherwise noted)

Characteristics

Output Drivers

Load Supply Voltage Range

Logic Supply Voltage Range

Output On Resistance

Body Diode Forward Voltage

Motor Supply Current

Logic Supply Current

Control Logic

Logic Input Voltage

Logic Input Current

Microstep Select

Logic Input Hysteresis

Blank Time

Fixed Off-Time

Reference Input Voltage Range

Reference Input Current

Current Trip-Level Error3

Crossover Dead Time

Protection

Overcurrent Protection Threshold4

Thermal Shutdown Temperature

Thermal Shutdown Hysteresis

VDD Undervoltage Lockout

VDD Undervoltage Hysteresis

Symbol

VBB

VDD

RDSON

VF

IBB

IDD

VIN(1)

VIN(0)

IIN(1)

IIN(0)

RMS1

RMS2

VHYS(IN)

tBLANK

tOFF

VREF

IREF

errI

tDT

IOCPST

TTSD

TTSDHYS

VDDUVLO

VDDUVLOHYS

Test Conditions

Operating

During Sleep Mode

Operating

Source Driver, IOUT = –1.5 A

Sink Driver, IOUT = 1.5 A

Source Diode, IF = –1.5 A

Sink Diode, IF = 1.5 A

fPWM < 50 kHz

Operating, outputs disabled

Sleep Mode

fPWM < 50 kHz

Outputs off

Sleep Mode

 VIN = VDD 0.7

 VIN = VDD 0.3

MS1 pin

MS2 pin

As a % of VDD

OSC = VDD or GND

ROSC = 25 kΩ

VREF = 2 V, %ITripMAX = 38.27%

VREF = 2 V, %ITripMAX = 70.71%

VREF = 2 V, %ITripMAX = 100.00%

VDD rising

Min. Typ.2 Max. Units

8

–

35

V

0

–

35

V

3.0

–

5.5

V

–

320

430

mΩ

–

320

430

mΩ

–

–

1.3

V

–

–

1.3

V

–

–

4

mA

–

–

2

mA

–

–

10

μA

–

–

8

mA

–

–

5

mA

–

–

10

μA

 VDD 0.7

–

–

V

–

–

 VDD 0.3

V

–20

<1.0

20

μA

–20

<1.0

20

μA

–

100

–

kΩ

–

50

–

kΩ

5

11

19

%

0.7

1

1.3

μs

20

30

40

μs

23

30

37

μs

0

–

4

V

–3

0

3

μA

–

–

±15

%

–

–

±5

%

–

–

±5

%

100

475

800

ns

2.1

–

–

A

–

165

–

°C

–

15

–

°C

2.7

2.8

2.9

V

–

90

–

mV

1For input and output current specifications, negative current is defined as coming out of (sourcing) the specified device pin.

2Typical data are for initial design estimations only, and assume optimum manufacturing and application conditions. Performance may vary for individual

units, within the specified maximum and minimum limits.

3VERR = [(VREF/8) – VSENSE] / (VREF/8).

4Overcurrent protection (OCP) is tested at TA = 25°C in a restricted range and guaranteed by characterization.

Allegro MicroSystems, Inc.

4

115 Northeast Cutoff, Box 15036

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

www.allegromicro.com

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