2-Phase/1-2 Phase Excitation
A3964SLB
Allegro MicroSystems product
2-Phase Stepper Motor Bipolar Driver IC
sFeatures
q
Fixed off-time PWM current control
q
Internally generated, precision 2.5V refer-
ence
q
External filter for sense terminal not required
q
Internal thermal shutdown circuitry
q
Internal crossover-current protection cir-
cuitry
q
Internal UVLO protection
q
Internal transient-suppression diodes
q
Low thermal resistance 20-pin SOP
sAbsolute
Maximum Ratings
Parameter
Load supply voltage
Output current (continuous)
Logic supply voltage
Logic input voltage range
Continuous output emitter voltage
Reference output current
Package power dissipation
Operating temperature
Junction temperature
Storage temperature
Symbol
V
BB
I
O
V
CC
V
IN
V
E
I
REF-OUT
P
D (Note1)
T
a
T
j (Note2)
T
stg
Ratings
30
±0.80
7.0
−0.3
to V
CC
+0.3
1.0
1.0
2.08
−20
to +85
+150
−55
to +150
Units
V
A
V
V
V
mA
W
°C
°C
°C
qOutput
current rating may be limited by duty cycle, ambient temperature, and heat sinking. Under any
set of conditions, do not exceed the specified current rating or a junction temperature of 150°C.
Note 1: When ambient temperature is 25°C or over, derate using
−16.7mW/°C.
Note 2: Fault conditions where junction temperature (T
j
) exceeds 150°C will activate the device's thermal
shutdown circuitry. These conditions can be tolerated but should be avoided.
sElectrical
Characteristics
Parameter
Power outputs (OUT
A
or OUT
B
)
Load supply voltage range
Output leakage current
(Unless specified otherwise, T
a
=25°C, V
BB
=30V, V
CC
=4.75V to 5.25V, V
REF
=2V, V
SENSE
= 0V)
Symbol
V
BB
I
CEX
Conditions
Operating
Sink driver, V
O
=V
BB
Source driver, V
O
=0V
Sink driver, I
O
=+500mA
Sink driver, I
O
=+750mA
Sink driver, I
O
=+800mA
Source driver, I
O
=−500mA
Source driver, I
O
=−750mA
Source driver, I
O
=−800mA
I
O
=±800mA, L=3mH
V
R
=30V
I
F
=800mA
V
EN1
=V
EN2
=0.8V, no load
V
EN1
=V
EN2
=2.4V, no load
min
5
Ratings
typ
max
30
50
−50
0.6
1.2
1.5
1.2
1.5
1.7
Units
Output saturation voltage
V
CE (SAT)
Output sustaining voltage
Clamp diode leakage current
Clamp diode forward voltage
Motor supply current
Control logic
Logic input voltage
Logic input current
V
CE (SUS)
I
R
V
F
I
BB (ON)
I
BB (OFF)
V
IH
V
IL
I
IH
I
IL
Reference output voltage
V
REF
•
OUT1
Current-sense comparator input current
I
REF
•
IN
Current-sense comparator input voltage range V
REF
•
IN
Current-sense comparator input offset voltage
V
TH
Timer blanking charge current (RC off)
I
RC
V
BLTH(1)
Timer blanking threshold (RC off)
V
BLTH(0)
Timer blanking OFF voltage (RC off)
V
RCOFF
Thermal shutdown temperature
T
j
Thermal shutdown hysteresis
∆T
j
I
CC (ON)
Logic supply current
I
CC (OFF)
Logic supply current/temperature coefficient
∆I
CC (ON)
q
"typ" values are for reference.
Note) Logic input: En1, En2, Ph1, Ph2
V
IN
=2.4V
V
IN
=0.8V
V
CC
=5.0V, I
REF
•
OUT
=90~900
µ
A
V
REF
•
IN
=1V
Operating
V
REF
•
IN
=0V
V
RC
=2.0V
R
T
=20kΩ
V
EN1
=V
EN2
=0.8V, no load
V
EN1
=V
EN2
=2.4V, no load
V
EN1
=V
EN2
=0.8V, no load
V
µ
A
µ
A
V
V
V
1.0
V
1.1
V
V
30
V
< 1.0
50
µ
A
1.6
2.0
V
10
mA
10
mA
(Unless specified otherwise, V
IN
=V
DD
or GND)
2.4
V
0.8
V
<
−1.0
20
µ
A
<
−20
−200
µ
A
2.45
2.50
2.55
V
−5.0
5.0
µ
A
−0.3
1.0
V
−6
6
mV
1.0
mA
3.0
V
1.0
V
3.0
V
165
°C
15
°C
65
85
mA
17
mA
0.18
mA/°C
< 1.0
<− 1.0
0.3
0.5
sTerminal
Connection Diagram
OUT
1B
SENSE
1
OUT
1A
V
BB
GROUND
GROUND
V
REF
IN
RC
1
PHASE
1
1
2
3
4
5
6
7
8
9
20 OUT
2B
19 SENSE
2
18 OUT
2A
17 V
CC
16 GROUND
15 GROUND
14 V
REF
OUT
13 RC
2
12 PHASE
2
11 ENABLE
2
sDerating
Allowable package power dissipation P
D (
W)
2.5
2.0
60
°
C
1.5
/W
1.0
0.5
ENABLE
1
10
0
−20
0
25
50
75 85
100
Ambient temperature Ta (°C)
58
A3964SLB