3973 Ver la hoja de datos (PDF) - Allegro MicroSystems

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Fabricante

3973

DUAL DMOS FULL-BRIDGE MICROSTEPPING PWM MOTOR DRIVER

Allegro MicroSystems 

3973

DUAL DMOS FULL-BRIDGE

MICROSTEPPING PWM MOTOR DRIVER

ELECTRICAL CHARACTERISTICS at TA = +25°C, VBB = 35 V, VDD = 5.0 V, VS = 0.5 V,

fPWM < 50 kHz (unless otherwise noted).

Limits

Characteristics

Symbol Test Conditions

Min. Typ. Max.

Control Logic (continued)

Internal Oscillator

DAC Accuracy (total error)

fOSC

OSC shorted to ground

3.0 4.0 5.0

ROSC = 51 kΩ

3.4 4.0 4.6

ET

Relative to DAC reference buffer

— ±1/2 —

output, D0 = 0, D17 = 0

Reference Input Voltage Range

Reference Buffer Offset

Reference Divider Ratio

VREF(EXT)

VOS

VREF/VS

D0 = 0, D18 = 0

D0 = 0, D18 = 1

0.5 — 2.6

— ±10 —

— 8.0 —

— 4.0 —

Reference Input Current

Internal Reference Voltage

Gain (Gm) Error (note 3)

IREF

VREF(INT)

EG

VREF = 2.0 V

D0 = 0, D17 = 0,

D18 = 0, DAC = 63

D18 = 0, DAC = 31

D18 = 1, DAC = 63

—

— ±0.5

1.94 2.0 2.06

—

0

±6

—

0

±9

—

0

±6

D18 = 1, DAC = 15

—

0 ±10

Comparator Input Offset Voltage

VIO

Propagation Delay Times

tpd

VREF = 0 V

50% to 90%:

PWM change to source on

PWM change to source off

PWM change to sink on

— ±5.0 —

500 800 1200

50 150 350

500 800 1200

PWM change to sink off

50 150 350

Crossover Dead Time

Thermal Shutdown Temperature

Thermal Shutdown Hysteresis

UVLO Enable Threshold

UVLO Hysteresis

tdt

TJ

∆TJ

VUVLO

∆VUVLO

Increasing VDD

300 700 900

— 165 —

— 15 —

3.9 4.2 4.45

0.05 0.10 —

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/Range) – VS]/(VREF/Range).

Units

MHz

MHz

LSB

V

mV

—

—

µA

V

%

%

%

%

mV

ns

ns

ns

ns

ns

°C

°C

V

V

115 Northeast Cutoff, Box 15036

4

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

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