DMOS Stepper Motor Driver with Translator
A3982
4
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
ELECTRICAL CHARACTERISTICS
1
at T
A
= 25°C, V
BB
= 35 V (unless otherwise noted)
1
Negative current is defined as coming out of (sourcing from) the specified device pin.
2
Typical data are for initial design estimations only, and assume optimum manufacturing and application conditions. Performance may vary for
individual units, within the specified maximum and minimum limits.
3
err
I
= (I
Trip
–
I
Prog
) ⁄ I
Prog
, where I
Prog
= %I
TripMAX
I
TripMAX
.
Characteristics Symbol Test Conditions Min.
Typ.
2
Max. Units
Output Drivers
Load Supply Voltage Range V
BB
Operating 8 – 35 V
Logic Supply Voltage Range V
DD
Operating 3.0 – 5.5 V
Output On Resistance R
DSON
Source Driver, I
OUT
= –1.5 A – 0.370 0.460
Sink Driver, I
OUT
= 1.5 A – 0.330 0.380
Body Diode Forward Voltage V
F
Source Diode, I
F
= –1.5 A – – 1.2 V
Sink Diode, I
F
= 1.5 A – – 1.2 V
Motor Supply Current I
BB
f
PWM
< 50 kHz – – 4 mA
Operating, outputs disabled – – 2 mA
Logic Supply Current I
DD
f
PWM
< 50 kHz – – 8 mA
Outputs off – – 5 mA
Control Logic
Logic Input Voltage
V
IN(1)
V
DD
0.7
––V
V
IN(0)
––
V
DD
0.3
V
Logic Input Current
I
IN(1)
V
IN
= V
DD
0.7
–20 <1.0 20 A
I
IN(0)
V
IN
=
V
DD
0.3
–20 <1.0 20 A
Input Hysteresis V
HYS(IN)
150 300 500 mV
Blank Time
t
BLANK
0.7 1 1.3 s
Fixed Off-Time
t
OFF
OSC > 3 V 20 30 40 s
R
OSC
= 25 k 23 30 37 s
Reference Input Voltage Range V
REF
0–4V
Reference Input Current I
REF
–3 0 3 A
Current Trip-Level Error
3
err
I
V
REF
= 2 V, %I
TripMAX
= 70.71% – – ±5 %
V
REF
= 2 V, %I
TripMAX
= 100.00% – – ±5 %
Crossover Dead Time t
DT
100 475 800 ns
Protection
Thermal Shutdown Temperature T
J
– 165 – °C
Thermal Shutdown Hysteresis T
JHYS
–15–°C
UVLO Enable Threshold UV
LO
V
DD
rising 2.35 2.7 3 V
UVLO Hysteresis UV
HYS
0.05 0.10 – V
