Stepping Motor Driver series
High Voltage Series
Stepping Motor Drivers
BD6422EFV (PARALLEL-IN type)
BD6425, BD6423EFV (CLK-IN type)
No.12009EAT06
●Description
These products are a low power consumption PWM constant current-drive driver of bipolar stepping motor
supply’s rated voltage of 45V and rated output current of 1.0A, 1.5A.
●Feature
1) Power supply: one system drive (rated voltage of 45V)
2) Rated output current: 1.0A, 1.5A
3) Low ON resistance DMOS output
4) CLK-IN drive mode (BD6425/6423EFV)
5) Parallel IN drive mode (BD6422EFV)
6) PWM constant current control (other oscillation)
7) Built-in spike noise blanking function (external noise filter is unnecessary)
8) FULL STEP & HALF STEP (two kinds), applicable to QUARTER STEP
9) Current decay mode switching function (4 kinds of FAST/SLOW DECAY ratio)
10) Normal rotation & reverse rotation switching function (BD6425/6423EFV)
11) Power save function
12) Built-in logic input pull-down resistor
13) Power-on reset function(BD6425/6423EFV)
14) Thermal shutdown circuit (TSD)
15) Over current protection circuit (OCP)
16) Under voltage lock out circuit (UVLO)
17) Malfunction prevention at the time of no applied power supply (Ghost Supply Prevention)
18) Electrostatic discharge: 8kV (HBM specification)
19) Microminiature, ultra-thin and high heat-radiation (exposed metal type) HTSSOP package
●Application
serial dot impact printer½sewing machine etc.
●Absolute
maximum ratings(Ta=25℃)
Item
Supply voltage
Power dissipation
Input voltage for control pin
RNF maximum voltage
Maximum output current
Operating temperature range
Storage temperature range
Junction temperature
※1
※2
※3
※4
※5
with power
Symbol
V
CC1,2
Pd
V
IN
V
RNF
I
OUT
T
opr
T
stg
T
jmax
BD6425EFV
-0.2½+45.0
1.45
※
1
4.70
※
2
-0.2½+5.5
0.7
1.5
※
5
-25½+85
-55½+150
+150
BD6423/6422EFV
-0.2½+45.0
1.1
※
3
4.0
※
4
-0.2½+5.5
0.7
1.0
※
5
-25½+85
-55½+150
+150
Unit
V
W
W
V
V
A/phase
℃
℃
℃
70mm×70mm×1.6mm glass epoxy board. Derating in done at 11.6mW/℃ for operating above Ta=25℃.
4-layer recommended board. Derating in done at 37.6mW/℃ for operating above Ta=25℃.
70mm×70mm×1.6mm glass epoxy board. Derating in done at 8.8mW/℃ for operating above Ta=25℃.
4-layer recommended board. Derating in done at 32.0mW/℃ for operating above Ta=25℃.
Do not, however exceed Pd, ASO and Tjmax=150℃.
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
1/8
2012.02 - Rev.A
BD6422EFV, BD6423EFV, BD6425EFV
●Operating
conditions( (Ta= -25½+85℃)
Item
Supply voltage
Maximum Output current (DC)
※6
Do not however exceed Pd, ASO.
Technical Note
Symbol
V
CC1,2
I
OUT
BD6425EFV
1.2
※
6
BD6423/6422EFV
19~42
6
0.7
※
Unit
V
A/phase
●Electrical
characteristics (Unless otherwise specified Ta=25℃½V
CC1,2
=37V)
Limit
Item
Symbol
Min.
Typ.
Whole
I
CCST
-
1.0
Circuit current at standby
-
2.0
I
CC
Circuit current
Control input
V
INH
2.0
-
H level input voltage
-
-
V
INL
L level input voltage
I
INH
35
50
H level input current
I
INL
-10
0
L level input current
Output (OUT1A, OUT1B, OUT2A, OUT2B)
R
ON
-
1.10
Output ON resistance(BD6425EFV)
R
ON
-
2.00
Output ON resistance(BD6423/6422EFV)
-
-
I
LEAK
Output leak current
Current control
I
RNFS
-2.0
-0.1
RNFXS input current (BD6425EFV)
I
RNF
-40
-20
RNFX input current
I
VREF
-2.0
-0.1
VREF input current
V
REF
0
-
VREF input voltage range
t
ONMIN
0.5
1.5
Minimum on time (Blank time)
BD6425/6423EFV
V
CTH
0.57
0.60
Comparator threshold
BD6422EFV
Comparator threshold 100%
V
CTH100
0.57
0.60
Comparator threshold 67%
V
CTH67
0.38
0.40
Comparator threshold 33%
V
CTH33
0.18
0.20
Max.
2.5
5.0
-
0.8
100
-
1.43
2.60
10
-
-
-
3.0
3.0
0.63
0.63
0.42
0.22
Unit
mA
mA
Condition
PS=L
PS=H, VREF=3V
V
V
μA
V
IN
=5V
μA
V
IN
=0V
Ω
I
OUT
=1.0A,Sum of upper and lower
Ω
I
OUT
=0.5A,Sum of upper and lower
μA
μA
μA
μA
V
μs
V
V
V
V
RNFXS=0V
RNFX=0V
VREF=0V
C=470pF, R=82kΩ
VREF=3V
VREF=3V, (I0X,I1X)=(L,L)
VREF=3V, (I0X,I1X)=(H,L)
VREF=3V, (I0X,I1X)=(L,H)
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
2/8
2012.02 - Rev.A
BD6422EFV, BD6423EFV, BD6425EFV
●Terminal
function and Application circuit diagram
1) BD6425EFV
Pin
Pin name
Function
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
GND
OUT1B
RNF1
RNF1S
OUT1A
NC
VCC1
NC
GND
CR
DEC1
DEC2
VREF
PS
Ground terminal
H bridge output terminal
Connection terminal of resistor for output
current detection
Input terminal of current limit comparator
H bridge output terminal
Non connection
Power supply terminal
Non connection
Ground terminal
Connection terminal of CR for setting
chopping frequency
Current decay mode setting terminal
Current decay mode setting terminal
Output current value setting terminal
Power save terminal
Technical Note
Pin
Pin name
No.
15
16
17
18
19
20
21
22
23
24
25
26
27
28
CLK
CW_CCW
TEST
MODE0
MODE1
ENABLE
NC
VCC2
NC
OUT2A
RNF2S
RNF2
OUT2B
NC
Clock input terminal for advancing the
electrical angle.
Motor rotating direction setting terminal
Terminal for testing
(used by connecting with GND)
Motor excitation mode setting terminal
Motor excitation mode setting terminal
Power supply terminal
Non connection
Power supply terminal
Non connection
H bridge output terminal
Input terminal of current limit comparator
Connection terminal of resistor for output
current detection
H bridge output terminal
Non connection
Function
Logic input terminal.
CLK
15
CW_CCW
16
Regulator
9
GND
Power save terminal.
MODE0
18
MODE1
19
ENABLE
20
Translator
RESET
UVLO
TSD
14
PS
Bypass capacitor.
Setting range is
100uF½470uF(electrolytic)
0.01uF½0.1uF(multilayer ceramic etc.)
Be sure to short VCC1 & VCC2.
VREF
13
Set the output currenet.
Input by resistor divison.
＋
－
OCP
2bit DAC
7
VCC1
RNF1
Set
the
chopping
frequency.
Setting range is
C:330pF½1500pF
R:15kΩ½200kΩ
＋
－
5
2
OUT1A
OUT1B
RNF1
RNF1S
VCC2
OUT2A
OUT2B
RNF2
RNF1S
GND
Resistor for current. detecting.
Setting range is
0.2Ω½0.4Ω.
Resistor for current. detecting.
Setting range is
0.2Ω½0.4Ω.
RNF2
＋
－
3
0.3Ω
100uF
0.1uF
Control logic
Blank time
PWM control
CR
10
DEC1
11
DEC2
12
TEST
17
OSC
Mix decay
control
Predriver
4
22
24
27
26
25
82kΩ
470pF
0.3Ω
Terminal for testing.
Please connect to GND.
1
Logic input terminal.
for setting current decay mode
Fig.1 Block diagram & Application circuit diagram of BD6425EFV
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
3/8
2012.02 - Rev.A
BD6422EFV, BD6423EFV, BD6425EFV
2) BD6423EFV
Pin
No.
1
2
3
4
5
6
7
8
9
10
11
12
Pin name
GND
OUT1B
RNF1
OUT1A
VCC1
NC
GND
CR
DEC1
DEC2
VREF
PS
Logic input terminal
Technical Note
Function
Ground terminal
H bridge output terminal
Connection terminal of resistor for output
current detection
H bridge output terminal
Power supply terminal
Non connection
Ground terminal
Connection terminal of CR for setting
PWM frequency
Current decay mode setting terminal
Current decay mode setting terminal
Output current value setting terminal
Power save terminal
Pin
No.
13
14
15
16
17
18
19
20
21
22
23
24
Pin name
CLK
CW_CCW
TEST
MODE0
MODE1
ENABLE
NC
VCC2
OUT2A
RNF2
OUT2B
NC
Function
Clock input terminal
for advancing the electrical angle.
Motor rotating direction setting terminal
Terminal for testing
(used by connecting with GND)
Motor excitation mode setting terminal
Motor excitation mode setting terminal
Output enable terminal
Non connection
Power supply terminal
H bridge output terminal
Connection terminal of resistor for output
current detection
H bridge output terminal
Non connection
CLK
13
CW_CCW
14
Regulator
7
Power save terminal.
GND
MODE0
16
MODE1
17
ENABLE
18
Translator
RESET
UVLO
TSD
12
PS
Bypass capacitor.
Setting range is
100uF½470uF(electrolytic)
0.01uF½0.1uF(multilayer ceramic etc.)
Be sure to short VCC1 & VCC2.
VREF
11
Setting output current
Input by resistance division.
＋
－
OCP
2bit DAC
5
VCC1
RNF1
Set the PWM frequency.
Setting range is
C:330pF½1500pF
R:15kΩ½200kΩ
＋
－
4
2
OUT1A
OUT1B
RNF1
VCC2
0.5Ω
100uF
0.1uF
RNF2
＋
－
3
Control logic
Blank time
PWM control
CR
8
DEC1
9
DEC2
10
OSC
Mix decay
control
Predriver
20
21
OUT2A
23
22
82kΩ
470pF
OUT2B
RNF2
GND
0.5Ω
Resistor for current. detecting.
Setting range is
0.4Ω½0.8Ω.
Logic input terminal
for setting current decay mode
TEST
15
1
Terminal for testing.
Please connect to GND.
Resistor for current. detecting.
Setting range is
0.4Ω½0.8Ω.
Fig.2 Block diagram & Application circuit diagram of BD6423EFV
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
4/8
2012.02 - Rev.A
BD6422EFV, BD6423EFV, BD6425EFV
3) BD6422EFV
Pin
Pin name
No.
1
2
3
4
5
6
7
8
9
10
11
12
GND
OUT1B
RNF1
OUT1A
VCC1
NC
GND
CR
DEC1
DEC2
VREF
PS
Ground terminal
H bridge output terminal
Connection terminal of resistor for output
current detection
H bridge output terminal
Power supply terminal
Non connection
Ground terminal
Connection terminal of CR for setting
PWM frequency
Current decay mode setting terminal
Current decay mode setting terminal
Output current value setting terminal
Power save terminal
Technical Note
Pin
Function
No.
13
14
15
16
17
18
19
20
21
22
23
24
Pin name
Function
PHASE1
I01
I11
PHASE2
I02
I12
NC
VCC2
OUT2A
RNF2
OUT2B
NC
Phase selection terminal
VREF division ratio setting terminal
VREF division ratio setting terminal
Phase selection terminal
VREF division ratio setting terminal
VREF division ratio setting terminal
Non connection
Power supply terminal
H bridge output terminal
Connection terminal of resistor for output
current detection
H bridge output terminal
Non connection
Logic input terminal.
Power save terminal.
PHASE1
13
PHASE2
16
I01
I11
15
I02
17
I12
18
＋
－
Regulator
7
GND
14
12
PS
UVLO
TSD
OCP
2bit DAC
5
VREF
11
Setting output current.
Input by resistance division.
Bypass capacitor.
Setting range is
100uF½470uF(electrolytic)
0.01uF½0.1uF(multilayer ceramic etc.)
Be sure to short VCC1 & VCC2.
VCC1
OUT1A
OUT1B
RNF1
0.5Ω
100uF
0.1uF
RNF1
Set the PWM frequency.
Setting range is
C:330pF½1500pF
R:15kΩ½200kΩ
＋
－
4
2
Control Logic
RNF2
＋
－
3
Blank time
PWM control
CR
8
Predriver
20
21
23
22
VCC2
OUT2A
OUT2B
RNF2
GND
Resistor for current. detecting.
Setting range is
0.4Ω½0.8Ω.
Resistor for current. detecting.
Setting range is
0.4Ω½1.0Ω.
82kΩ
470pF
OSC
Mix decay
control
DEC1
9
DEC2
10
0.5Ω
1
Logic input terminal.
for setting current decay mode
Fig.3 Block diagram & Application circuit diagram of BD6422EFV
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
5/8
2012.02 - Rev.A
京公网安备 11010802033920号
EEWORLD
