3977 View Datasheet(PDF) - Allegro MicroSystems

Part Name

Description

Manufacturer

3977

MICROSTEPPING DMOS DRIVER WITH TRANSLATOR

Allegro MicroSystems 

3977

MICROSTEPPPING 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.

Control Logic (cont’d)

Mixed Decay Trip Point

Ref. Input Voltage Range

Reference Input Current

Gain (Gm) Error

(note 3)

Crossover Dead Time

Thermal Shutdown Temp.

Thermal Shutdown Hysteresis

UVLO Enable Threshold

UVLO Hysteresis

Logic Supply Current

PFDH

PFDL

VREF Operating

IREF

EG VREF = 2 V, Phase Current = 38.27%

VREF = 2 V, Phase Current = 70.71%

VREF = 2 V, Phase Current = 100.00%

tDT SR enabled

TJ

∆TJ

VUVLO Increasing VDD

∆VUVLO

IDD fPWM < 50 kHz

Outputs off

–

–

0

–

–

–

–

100

–

–

2.45

0.05

–

–

0.6VDD

0.21VDD

–

0

–

–

–

475

165

15

2.7

0.10

–

–

Sleep mode

–

–

* Operation at a step frequency greater than the specified minimum value is possible but not warranteed.

NOTES: 1. Typical Data is for design information only.

2. Negative current is defined as coming out of (sourcing) the specified device terminal.

3. EG = ([VREF/8] – VSENSE)/(VREF/8)

Max.

–

–

VDD

±3.0

±10

±5.0

±5.0

800

–

–

2.95

–

12

10

20

Units

V

V

V

µA

%

%

%

ns

°C

°C

V

V

mA

mA

µA

www.allegromicro.com

5

Share Link: