A4986 datasheet(4/14 Pages) ALLEGRO

Part #	A4986

Description	DMOS Dual Full-Bridge PWM Motor Driver with Overcurrent Protection

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Manufacturer	ALLEGRO [Allegro MicroSystems]

Direct Link	http://www.allegromicro.com

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4 / 14 page

DMOS Dual Full-Bridge PWM Motor Driver

with Overcurrent Protection

A4986

4

Allegro MicroSystems, Inc.

115 Northeast Cutoff, Box 15036

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

www.allegromicro.com

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

Characteristics

Symbol

Test Conditions

Min.

Typ.2

Max.

Units

Output Drivers

Load Supply Voltage Range

VBB

Operating

8

–

35

V

During Sleep Mode

0

–

35

V

Logic Supply Voltage Range

VDD

Operating

3.0

–

5.5

V

Output On Resistance

RDSON

Source Driver, IOUT = –1.5 A

–

320

430

mΩ

Sink Driver, IOUT = 1.5 A

–

320

430

mΩ

Body Diode Forward Voltage

VF

Source Diode, IF = –1.5 A

–

1.3

V

Sink Diode, IF = 1.5 A

–

1.3

V

Motor Supply Current

IBB

fPWM < 50 kHz

–

4

mA

Operating, outputs disabled

–

2

mA

Sleep Mode

–

10

μA

Logic Supply Current

IDD

fPWM < 50 kHz

–

8

mA

Outputs off

–

5

mA

Sleep Mode

–

10

μA

Control Logic

Logic Input Voltage

VIN(1)

VDD0.7

––

V

VIN(0)

––

VDD0.3

V

Logic Input Current

IIN(1)

VIN = VDD0.7

–20

<1.0

20

μA

IIN(0)

VIN = VDD0.3

–20

<1.0

20

μA

Logic Input Pull-down

RIN02

–

100

–

kΩ

RIN12

–50–

kΩ

Logic Input Hysteresis

VHYS(IN)

As a % of VDD

511

19

%

Blank Time

tBLANK

0.7

1

1.3

μs

Fixed Off-Time

tOFF

OSC = VDD or GND

20

30

40

μs

ROSC = 25 kΩ

23

30

37

μs

Reference Input Voltage Range

VREF

0–4

V

Reference Input Current

IREF

–3

0

3

μA

Current Trip-Level Error3

errI

VREF = 2 V, %ITripMAX = 33.3%

–

±15

%

VREF = 2 V, %ITripMAX = 66.7%

–

±5

%

VREF = 2 V, %ITripMAX = 100.00%

–

±5

%

Crossover Dead Time

tDT

100

475

800

ns

Protection

Overcurrent Protection Threshold

IOCPST

2.1

–

A

Thermal Shutdown Temperature

TTSD

–

165

–

°C

Thermal Shutdown Hysteresis

TTSDHYS

–15–°C

VDD Undervoltage Lockout

VDDUVLO

VDD rising

2.7

2.8

2.9

V

VDD Undervoltage Hysteresis

VDDUVLOHYS

–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).

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