UDN2917EB
2-Phase/1-2 Phase/W1-2 Phase Excitation
2-Phase Stepper Motor Bipolar Driver IC
Allegro MicroSystems product
sFeatures
sAbsolute Maximum Ratings
q Fixed off-time PWM current control
Parameter
Motor supply voltage
Output current (peak)
Output current (continuous)
Logic supply voltage
Logic input voltage range
Output emitter voltage
Package power dissipation
Operating temperature
Junction temperature
Storage temperature
q Internal 1/3 and 2/3 reference divider
q 1-phase/2-phase/W1-2 phase excitation
mode with digital input
q Microstepping with reference input
q Low saturation voltage (Sink transistor)
q Internal thermal shutdown circuitry
q Internal crossover-current protection circuitry
Symbol
VBB
IO (peak)
IO
VCC
VIN
VE
PD (Note1)
Ta
T j (Note2)
T stg
Conditions
Ratings
45
±1.75
±1.5
7.0
−0.3 to +7.0
1.0
4.16
−20 to +85
+150
−55 to +150
tw≤20 µ s
Units
V
A
A
V
V
V
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 −33.3mW/°C.
Note 2: Fault conditions where junction temperature (Tj) exceeds 150°C will activate the device’s thermal
shutdown circuitry. These conditions can be tolerated but should be avoided.
q Internal UVLO protection
q Internal transient-suppression diodes
q Low thermal resistance 44-pin PLCC
sElectrical Characteristics
(Unless specified otherwise, Ta =25°C, VBB=45V, VCC=5.0V, VREF=5.0V)
Parameter
Symbol
Power outputs (OUTA or OUTB )
Motor supply voltage range
ICEX
Output sustaining voltage
VCE (SUS)
Output saturation voltage
VCE (SAT)
Clamp diode leakage current
Clamp diode forward voltage
IR
VF
IBB (ON)
IBB (OFF)
Motor supply current
Control logic
Logic supply voltage
VCC
VIH
VIL
Input voltage
Reference voltage range
IIH
IIL
VREF
Current control threshold
V REF/VSENSE
Input current
Thermal shutdown temperature
Logic supply current
45
50
−50
0.7
1.0
1.9
2.1
50
2.0
12
6.0
5.0
5.25
10
Sink driver, VO =VBB
Source driver, V O=0V
IO=±1.5A, L=3.5mH
Sink driver, IO =+1.0A
Sink driver, IO =+1.5A
Source driver, IO =−1.0A
Source driver, IO =−1.5A
V R=45V
IF=1.5A
Both bridges ON, no load
Both bridges OFF
45
Operating
All inputs
All inputs
V IH=2.4V
VIL=0.8V
Operating
I0 =I1 =0.8V
I0=2.4V, I1=0.8V
I0=0.8V, I1=2.4V
4.75
2.4
0.8
20
−200
7.5
10.5
16.5
34.5
<1.0
−3.0
1.5
9.5
13.5
25.5
10.0
15.0
30.0
170
90
10
Tj
ICC (ON)
ICC (OFF)
max
0.5
0.8
1.8
1.9
<1.0
1.6
9.0
4.0
min
VBB
Output leakage current
Limits
typ
<1.0
< −1.0
Conditions
I0=I1 =VEN =0.8V, no load
I0 =I1=2.4V, no load
105
12
q“typ” values are for reference.
39
PWM 1
9
10
37
1
36
35
12
34
VBB
11
13
14
33
32
2
15
31
PWM 2
84
UDN2917EB
θ2
EN2
18
19
20
21
22
23
24
25
26
27
28
SENSE2
OUT2B
LOAD SUPPLY
I20
I21
VREF2
PHASE2
ENABLE2
RC2
29
OUT2A
30
17
E2
16
GROUND
GROUND
38
8
GROUND
sDerating
Allowable package power dissipation PD (W)
LOGIC SUPPLY
RC1
40
VREF1
44
7
VCC
I11
1
ENABLE1
I10
2
41
OUT1B
3
PHASE1
SENSE1
4
42
E1
5
EN1
GROUND
43
OUT1A
6
θ1
sTerminal Connection Diagram
5
4
30
°C
/W
3
2
1
0
−20
0
25
50
75 85
Ambient temperature Ta (°C)
100
Units
V
µA
µA
V
V
V
V
V
µA
V
mA
mA
V
V
V
µA
µA
V
°C
mA
mA
