3977 datasheet(4/18 Pages) ALLEGRO

4 / 18 page

115 Northeast Cutoff, Box 15036

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

3977

MICROSTEPPING DMOS DRIVER

WITH TRANSLATOR

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

noted)

Limits

Characteristic

Symbol Test Conditions

Min.

Typ.

Max.

Units

Output Drivers

Load Supply Voltage Range

VBB

Operating

8.0

–

During sleep mode

–

Output Leakage Current

IDSS

VOUT = VBB

–

<1.0

µA

VOUT = 0 V

–

<1.0

-20

µA

Output On Resistance

rDS(on)

Source driver, IOUT = -2.5 A

–

0.45

0.57

Ω

Sink driver, IOUT = 2.5 A

–

0.36

0.43

Ω

Body Diode Forward Voltage

Source diode, IF = -2.5 A

–

1.4

Sink diode, IF = 2.5 A

–

1.4

Motor Supply Current

IBB

fPWM < 50 kHz

–

8.0

Operating, outputs disabled

–

6.0

Sleep mode

–

µA

Control Logic

Logic Supply Voltage Range

VDD

Operating

3.0

5.0

5.5

Logic Input Voltage

VIN(1)

0.7VDD

––

VIN(0)

–

0.3VDD

Logic Input Current

IIN(1)

VIN = 0.7VDD

-20

<1.0

µA

IIN(0)

VIN = 0.3VDD

-20

<1.0

µA

Maximum STEP Frequency

fSTEP

500*

–

kHz

HOME Output Voltage

VOH

IOH = -200 µA

0.7VDD

–

VOL

IOL = 200 µA

–

0.3VDD

Blank Time

tBLANK

Rt = 56 kΩ, Ct = 680 pF

700

950

1200

Fixed Off Time

toff

Rt = 56 kΩ, Ct = 680 pF

µs

continued next page …

3977 Datasheet(PDF) 4 Page - Allegro MicroSystems

3977 Datasheet(HTML) 4 Page - Allegro MicroSystems

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18

Datasheet Download

Link URL