3972

DUAL DMOS FULL-BRIDGE

MICROSTEPPING PWM MOTOR DRIVER

115 Northeast Cutoff, Box 15036

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

4

ELECTRICAL CHARACTERISTICS at T

f

Limits

Characteristics

Symbol

Test Conditions

Min.

Typ.

Max.

Units

Control Logic (continued)

Internal Oscillator

f

OSC

OSC shorted to ground

3.0

4.0

5.0

MHz

R

3.4

4.0

4.6

MHz

DAC Accuracy (total error)

E

T

Relative to DAC reference buffer

—

±1/2

—

LSB

output, D0 = 0, D17 = 0

Reference Input Voltage Range

V

REF(EXT)

0.5

—

2.6

V

Reference Buffer Offset

V

OS

—

±10

—

mV

Reference Divider Ratio

V

D0 = 0, D18 = 0

—

8.0

—

—

D0 = 0, D18 = 1

—

4.0

—

—

Reference Input Current

I

REF

V

—

—

±0.5

µA

Internal Reference Voltage

V

REF(INT)

1.94

2.0

2.06

V

Gain (G

E

G

D0 = 0, D17 = 0,

D18 = 0, DAC = 63

—

0

±6%

D18 = 0, DAC = 31

—

0

±9%

D18 = 1, DAC = 63

—

0

±6%

D18 = 1, DAC = 15

—

0

±10

%

Comparator Input Offset Voltage

V

IO

V

—

±5.0

—

mV

Propagation Delay Times

t

pd

50% to 90%:

PWM change to source on

500

800

1200

ns

PWM change to source off

50

150

350

ns

PWM change to sink on

500

800

1200

ns

PWM change to sink off

50

150

350

ns

Crossover Dead Time

t

dt

300

700

900

ns

Thermal Shutdown Temperature

T

J

—

165

—

°C

Thermal Shutdown Hysteresis

∆T

J

—15

—

°C

UVLO Enable Threshold

V

UVLO

Increasing V

DD

3.9

4.2

4.45

V

UVLO Hysteresis

∆V

UVLO

0.05

0.10

—

V

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

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

3. E