3973
DUAL DMOS FULL-BRIDGE
MICROSTEPPING PWM MOTOR DRIVER
ELECTRICAL CHARACTERISTICS at T
A
= +25
°
C, V
BB
= 35 V, V
DD
= 5.0 V, V
S
= 0.5 V,
f
PWM
< 50 kHz (unless otherwise noted).
Limits
Characteristics
Control Logic (continued)
Internal Oscillator
f
OSC
E
T
V
REF(EXT)
V
OS
V
REF
/V
S
I
REF
V
REF(INT)
E
G
D0 = 0, D17 = 0,
D18 = 0, DAC = 63
D18 = 0, DAC = 31
D18 = 1, DAC = 63
D18 = 1, DAC = 15
Comparator Input Offset Voltage
Propagation Delay Times
V
IO
t
pd
V
REF
= 0 V
50% to 90%:
PWM change to source on
PWM change to source off
PWM change to sink on
PWM change to sink off
Crossover Dead Time
Thermal Shutdown Temperature
Thermal Shutdown Hysteresis
UVLO Enable Threshold
UVLO Hysteresis
t
dt
T
J
∆T
J
V
UVLO
∆V
UVLO
Increasing V
DD
500
50
500
50
300
—
—
3.9
0.05
800
150
800
150
700
165
15
4.2
0.10
1200
350
1200
350
900
—
—
4.45
—
ns
ns
ns
ns
ns
°C
°C
V
V
—
—
—
—
—
0
0
0
0
±5.0
±6
±9
±6
±10
—
%
%
%
%
mV
D0 = 0, D18 = 0
D0 = 0, D18 = 1
Reference Input Current
Internal Reference Voltage
Gain (G
m
) Error (note 3)
V
REF
= 2.0 V
OSC shorted to ground
R
OSC
= 51 kΩ
DAC Accuracy (total error)
Relative to DAC reference buffer
output, D0 = 0, D17 = 0
Reference Input Voltage Range
Reference Buffer Offset
Reference Divider Ratio
0.5
—
—
—
—
1.94
—
±10
8.0
4.0
—
2.0
2.6
—
—
—
±0.5
2.06
V
mV
—
—
µA
V
3.0
3.4
—
4.0
4.0
±1/2
5.0
4.6
—
MHz
MHz
LSB
Symbol
Test Conditions
Min.
Typ.
Max.
Units
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
G
= [(V
REF
/Range) – V
S
]/(V
REF
/Range).
4
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Worcester, Massachusetts 01615-0036 (508) 853-5000
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