NJW4351
Unipolar Stepper Motor Driver
GENERAL DESCRIPTION
The NJW4351 is a high efficiency DMOS unipolar stepper
motor driver IC. Compared to previous devices, it is more suitable
for low voltage operation, capable of handling 5.0V, 3.3V and the
like logic circuits. Drive Stage consists of DMOS which produces
high efficiency and low heat generation motor drive circuit.
The motor can be controlled by the STEP and DIR system.
Further more, to improve controllability of system, MO, ENABLE,
RESET and PD function are included, various applications are
possible.
FEATURES
•
Supply Voltage
PACKAGE OUTLINE
NJW4351VC3
NJW4351D
V
DD
=2.7 to 5.5V
V
MM
= to 55V
•
Output Current
Io=1.5A peak at V
DD
=5V
•
Low Quiescent Current
I
DD
=500µA typ.
•
STEP&DIR Input Operation (Internal Translator)
•
HALF/FULL Mode Generation
•
TTL compatible Input With Schmitt-Comparator
•
ENABLE Function
•
RESET Function
•
MO (Motor Origin Monitor) -Position-indication Output
•
PD (Standby) Function
•
Under Voltage Lock Out
•
Thermal Shutdown Circuit
•
Alarm Output Function (As the protection circuit operates)
•
BCD Technology
•
Package Outline
SSOP20-C3, DIP16
BLOCK DIAGRAM
VDD
NJW4351
POWER ON
RESET
OUT2B
OUT2A
HSM
STEP
DIR
RESET
GATE
DRIVE
OUT1B
OUT1A
TRANSLATOR
ENABLE
PD
Bias Circuit
MO
ALARM
UNDER VOLTAGE
LOCK OUT
SENSE1
THERMAL SHUT
DOWN
SENSE2
GND
‘Ver.2010-03-26
-1-
NJW4351
PIN CONNECTION
PD
VDD
HSM
STEP
DIR
RESET
ENABLE
MO
ALARM
GND
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
N.C.
N.C.
OUT1A
SENSE1
OUT1B
OUT2B
SENSE2
OUT2A
N.C.
N.C.
VDD 1
HSM 2
STEP 3
DIR 4
RESET 5
ENABLE 6
MO 7
ALARM 8
16 PD
15 OUT1A
14 SENSE1
13 OUT1B
12 OUT2B
11 SENSE2
10 OUT2A
9 GND
SSOP20-C3
PIN FUNCTION LIST
Pin#
DIP16
SSOP20-C3
1
2
3
4
5
6
7
8
9
10
11,12,19,20
13
14
15
16
17
18
DIP16
16
1
2
3
4
5
6
7
8
9
-
10
11
12
13
14
15
Terminal
Name
Function
Power Saving State Setting
Input Terminal
Logic Voltage Supply Terminal
HALF/FULL Step Mode Setting
Input Terminal
Stepping Pulse Input Terminal
Direction Setting Input Terminal
Reset Input Terminal
Phase Output Off Input Terminal
MO Output Terminal
Internal Protection Operation
Detection Output Terminal
Logic Ground Terminal
No Connection
2ch Output Terminal A
Current Detection Resistance
Connection Terminal 2
2ch Output Terminal B
1ch Output Terminal B
Current Detection Resistance
Connection Terminal 1
1ch Output Terminal A
Remark
L=Standby, H=Normal Operation
Logic Voltage Supply
L=FULL, H=HALF
The Translator is triggered by positive edge of STEP
Pulse.
L=FORWARD, H=REVERSE
L=The Translator is initialized, H=Normal Operation
L=ACTIVE, H=Normal Operation
When the Translator is in initial status, L level is to output.
When the internal protection operation is detected, L level
is to output.
Logic Ground
No Connection
⎯
It connects resistance for the detection of the side of 2ch.
At the unused time, it connects with GND.
⎯
⎯
It connects resistance for the detection of the side of 1ch.
At the unused time, it connects with GND.
⎯
PD
VDD
HSM
STEP
DIR
RESET
ENABLE
MO
ALARM
GND
N.C.
OUT2A
SENSE2
OUT2B
OUT1B
SENSE1
OUT1A
-2-
Ver.2010-03-26
NJW4351
UNIT
V
VDD PIN
V
OUT1A/1B/2A/2B PIN
STEP, DIR, HSM, RESET,
Logic Input Voltage
V
IN
7
V
ENABLE, PD PIN
ALARM Output Voltage
V
ALARM
7
V
ALARM PIN
MO Output Voltage
V
MO
7
V
MO PIN
Output Current
Io
1.5
A
OUT1A/1B/2A/2B PIN
ALARM Output Current
I
ALARM
20
mA ALARM PIN
MO Output Current
I
MO
20
mA MO PIN
Operating Temperature
Topr
-40 to +85
-
°C
Junction Temperature
Tj
-40 to +150
-
°C
Storage Temperature
Tstg
-50 to +150
-
°C
Power Dissipation
1.0
W
(*1) Mounted on 2Layers PCB
P
D
(SSOP20-C3)
1.5
W
(*1) Mounted on 4Layers PCB
1.2
W
Device itself
Power Dissipation
P
D
1.4
W
(*1) Mounted on 2Layers PCB
(DIP16)
2.0
W
(*1) Mounted on 4Layers PCB
(*1): Mounted on glass epoxy board based on EIA/JEDEC. (114.3x76.2x1.6mm: 2Layers/4Layers)
RECOMMENDED OPERATING CONDITIONS
PARAMETER
SYMBOL
TEST CONDITION
Logic Supply Voltage
V
DD
V
DD
=5V
Output Current
Io
V
DD
=3.3V
(Ta=25°C)
MAX. UNIT
5.5
V
-
mA
500
mA
ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
Logic Supply Voltage
V
DD
Motor Output Voltage
V
O
(Ta=25°C)
RATINGS
7
55
MIN.
2.7
-
-
TYP.
3.3
500
-
-3-
NJW4351
ELECTRICAL CHARACTERISTICS
PARAMETER
SYMBOL
GENERAL
Quiescent current
I
DD
(V
MM
=24V, V
DD
=PD=3.3V, R
L
=1k
Ω
, R
MO
=3.3k
Ω
, R
ALARM
=3.3k
Ω
, Ta=25
°C
)
TEST CONDITION
MIN.
TYP.
MAX. UNIT
STEP,DIR,HSM,RESET,ENABLE=3.3V,
Except I
IH
-
-
2.0
0
0.4
2.4
0
0.4
15
-
-
2
2.0
0
-
2.4
0
-
15
-200
-
2
1
1
-
-
-
-
-
-
-
-
-
-
-
-
1.6
1.9
0.2
0.5
-
-
-
0.55
-
-
0.55
33
10
100
-
-
-
0.13
-
-
0.14
33
0
100
-
-
-
1.2
0.9
1
0.3
-
0.3
-
0.3
-
170
140
30
1.9
2.2
0.3
0.8
1.0
-
0.8
-
-
0.8
-
45
20
-
-
-
0.8
-
-
0.8
-
45
+200
-
-
-
-
1.45
1.25
5
-
1
0.5
1
0.5
1
-
-
-
2.2
2.5
0.4
mA
uA
V
V
V
V
V
V
uA
uA
kΩ
us
V
V
V
V
V
V
uA
nA
kΩ
us
us
us
Ω
Ω
uA
us
uA
V
uA
V
uA
°C
°C
°C
V
V
V
Quiescent current (Standby)
I
PD
PD=0V, except I
IH
INPUT BLOCK1
(STEP)
H level input voltage1
V
IH1
L level input voltage1
V
IL1
Input hysteresis voltage1
V
IHYS1
H level input voltage2
V
IH2
V
DD
=5V
L level input voltage2
V
IL2
V
DD
=5V
Input hysteresis voltage2
V
IHYS2
V
DD
=5V
H level input current
I
IH
STEP=3.3V
L level input current
I
IL
STEP=0V
Input pull down resistance
R
DOWN
Input pulse widths
tp
INPUT BLOCK2
(PD/DIR/HSM/RESET/ENABLE)
H level input voltage1
V
IH1
L level input voltage1
V
IL1
Input hysteresis voltage1
V
IHYS1
H level input voltage2
V
IH2
V
DD
=5V
L level input voltage2
V
IL2
V
DD
=5V
Input hysteresis voltage2
V
IHYS2
V
DD
=5V
H level input current
L level input current
I
IH
I
IL
PD, DIR, HSM, RESET, ENABLE=3.3V,
per input
PD, DIR, HSM, RESET, ENABLE=0V,
per input
Input pull down resistance
R
DOWN
Input pulse widths
tp
Data setup time
t
DS
Data hold time
t
DH
MOTOR OUTPUT BLOCK
(OUT1A/OUT1B/OUT2A/OUT2B)
Output ON resistance1
R
O1
Io=500mA
Output ON resistance2
R
O2
V
DD
=5.0V, Io=500mA
Output leak current
I
OLEAK
ENABLE=0V,Vo=50V
Delay time
t
DELAY
At turn on
Sense terminal leak current
I
SENSELEAK
ENABLE=0V, V
SENSE
=1V(SENSE→GND)
MO OUTPUT (MO)
L level output voltage
V
MO
I
MO
=10mA
MO terminal leak current
I
MOLEAK
V
MO
=5.5V
MO OUTPUT
(ALARM)
L level output voltage
V
ALARM
I
ALARM
=10mA
ALARM terminal leak current
I
ALARMLEAK
V
ALARM
=5.5V
THERMAL SHUTDOWN BLOCK
Thermal shutdown operating
T
TSD1
temperature
Thermal shutdown recovery
T
TSD2
temperature
Thermal shutdown hysteresis
∆T
TSD
UNDER VOLTAGE LOCK OUT BLOCK
UVLO operating voltage
V
UVLO1
UVLO recovery voltage
V
UVLO2
UVLO hysteresis voltage
∆V
UVLO
-4-
Ver.2010-03-26
NJW4351
PIN/ CIRCUIT OPERATIONAL DEFINITION
♦
Logic Input Pins Operational Voltage Definition
At VDD=3.3V
V
IN
V
DD
H level input voltage
V
5.0V
H level input voltage
2.0V
2.0V
∆V
HYS
0.8V
L level input voltage
0.8V
L level input voltage
0V
♦
Logic Input Pins Timing Definition
At VDD=3.3V
Master Pin
STEP
V
V
IH
=2.0V
V
IL
=0.8V
0V
L level
H level
L lebvel
H level
L level
tp
tp
Slave Pins
HSM, DIR
RESET, PD
V
IH
=2.0V
V
IL
=0.8V
tp
tp
t
DS1
t
DH2
t
DS2
t
DH1
t
Data Setup Time and Data Hold Time are defined to positive edge of STEP.
t
DS1
,t
DS2
=Data Setup Time, t
DH1
,t
DH2
=Data Hold Time
t
DS1
,t
DH1
=HSM,DIR,RESET, PD, t
DS2
,t
DH2
=HSM,DIR
-5-
模拟与混合信号
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