Stepping Motor Driver Series
Standard 36V
Stepping Motor Drivers
BD6393FP, BD6395FP
No.12009EAT05
●Description
BD6393FP,BD6395FP are the simple type that provides the minimum function for driving stepping motor and various
protection circuits.
As for its basic function, it is a low power consumption bipolar PWM constant current-drive driver with power upply’s rated
voltage of 36V and rated output current of 1.2A, 1.5A. There are excitation modes of FULL STEP & HALF STEP &,
QUARTER STEP mode. This series contributes to reduction of mounting area, cost down, safety design.
●Feature
1) Power supply: one system drive (rated voltage of 36V)
2) Rated output current: 0.8A, 1.2A, 1.5A
3) Low ON resistance DMOS output
4) Parallel IN drive mode
5) PWM constant current control (self oscillation)
6) Built-in spike noise cancel function (external noise filter is unnecessary)
7) FULL STEP, HALF STEP, QUARTER STEP
8) Power save function
9) Built-in logic input pull-down resistor
10) Power-on reset function
11) Thermal shutdown circuit (TSD)
12) Over current protection circuit (OCP)
13) Under voltage lock out circuit (UVLO)
14) Over voltage lock out circuit (OVLO)
15) Malfunction prevention at the time of no applied power supply (Ghost Supply Prevention)
16) Electrostatic discharge: 4kV (HBM specification)
17) FIN heat-radiating type HSOP package (BD6393FP/BD6395FP)
18) Pin-compatible line-up (BD6393FP/BD6395FP)
●Application
Laser beam printer, Scanner, Photo printer, FAX, Ink jet printer, Mini printer, Sewing machine, Toy, and Robot etc.
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© 2012 ROHM Co., Ltd. All rights reserved.
1/8
2012.02 - Rev.A
BD6393FP, BD6395FP
●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
Symbol
V
CC1,2
Pd
V
IN
V
RNF
I
OUT
T
opr
T
stg
T
jmax
BD6393FP
-0.2½+36.0
1
1.45
※
3.47
※
2
-0.2½+5.3
0.5
1.2
※
3
-25½+75
-55½+150
150
1.5
※
3
BD6395FP
Technical Note
Unit
V
W
V
V
A/phase
℃
℃
℃
※1
70mm×70mm×1.6mm glass epoxy board. Derating in done at 11.6mW/℃ for operating above Ta=25℃.
※2
4-layer recommended board. Derating in done at 27.8mW/℃ for operating above Ta=25℃.
※3
Do not, however exceed Pd, ASO and Tjmax=150℃.
●Operating
conditions(Ta= -25½+75℃)
Item
Supply voltage
Output current (DC)
※4
Do not however exceed Pd, ASO.
Symbol
V
CC1,2
I
OUT
BD6393FP
16½28
0.8
※
4
BD6395FP
1.2
※
4
Unit
V
A/phase
●Electrical
characteristics
Applicable to all the series (Unless otherwise specified Ta=25℃, V
cc1,2
=24V)
Limit
Item
Symbol
Min.
Typ.
Max.
Whole
Circuit current at standby
I
CCST
-
0.45
2.00
Circuit current
I
CC
-
3
10
Control input (PHASE1, I01, I11, PHASE2, I02, I12, PS)
H level input voltage
V
INH
2.0
-
5.0
L level input voltage
V
INL
0
-
0.8
Output (OUT1A, OUT1B, OUT2A, OUT2B)
Output ON resistance
R
ON
-
1.80
2.16
(BD6393FP)
Output ON resistance
R
ON
-
1.00
1.30
(BD6395FP)
Output leak current
I
LEAK
-
-
10
Current control
RNFX input current
I
RNFX
-40
-20
-
VREF input current
I
VREF
-2.0
-0.1
-
VREF input voltage range
V
REF
0
-
2
Comparator threshold
V
CTHLL
0.340
0.400
0.460
100%
Comparator threshold
0.227
0.267
0.307
V
CTHHL
67%
Comparator threshold
V
CTHLH
0.113
0.133
0.153
33％
Minimum on time
t
ONMIN
0.3
0.7
1.2
Unit
Condition
mA
mA
V
V
PS=L
PS=H, VREF=2V
Ω
Ω
μA
μA
μA
V
V
V
V
μs
I
OUT
=±0.6A
Sum of upper and lower
I
OUT
=±1.0A
Sum of upper and lower
RNFX=0V
VREF=0V
VREF=2V,I0X=L,I1X=L
VREF=2V,I0X=H,I1X=L
VREF=2V,I0X=L,I1X=H
R=39kΩ, C=1000pF
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© 2012 ROHM Co., Ltd. All rights reserved.
2/8
2012.02 - Rev.A
BD6393FP, BD6395FP
●Terminal
function½ Block diagram½Application circuit diagram
BD6393FP/ BD6395FP
Pin
Pin name
Function
No.
1
2
3
4
5
6
FIN
7
8
9
10
11
12
13
PGND
OUT1B
VCC1
RNF1
NC
OUT1A
FIN
CR1
PHASE1
I11
I01
VREF
PS
NC
Ground terminal
H bridge output terminal
Power supply terminal
Connection terminal of resistor for output
current detection
Non connection
H bridge output terminal
Fin terminal
(used by connecting with GND)
Connection terminal of CR for setting
PWM frequency
Logic input terminal
Logic input terminal for DAC
Logic input terminal for DAC
Output current value setting terminal
Power save terminal
Non connection
Technical Note
Pin
Pin name
No.
14
15
16
17
18
19
FIN
20
21
22
23
24
25
NC
GND
I02
I12
PHASE2
CR2
FIN
OUT2A
NC
RNF2
VCC2
OUT2B
NC
Non connection
Ground terminal
Logic input terminal for DAC
Logic input terminal for DAC
Logic input terminal
Connection terminal of CR for setting
PWM frequency
Fin terminal
(used by connecting with GND)
H bridge output terminal
Non connection
Connection terminal of resistor for output
current detection
Power supply terminal
H bridge output terminal
Non connection
Function
Set the PWM frequency.
Setting range is
C:470pF½4700pF
R:10kΩ½100kΩ.
VCC1
PHASE1
CR1
OUT1A
Resistor for current.
detecting.
Setting range is
0.1Ω½0.3Ω.
39kΩ
1000pF
I01
I11
ONE
SHOT
DAC
LOGIC
Predriver
OUT1B
RNF1
0.2Ω
Be sure to short VCC1 & VCC2.
OCP
Current
Limit
Comp.
VCC2
OUT2A
0.1uF
100uF
PHASE2
CR2
39kΩ
1000pF
I02
I12
ONE
SHOT
DAC
LOGIC
Predriver
OUT2B
RNF2
0.2Ω
OCP
Current
Limit
Comp.
Regulator
RESET
PS
Bypass capacitor.
Setting range is
100uF½470uF(electrolytic)
0.01uF½0.1uF(multilayer ceramic etc.)
Set the PWM frequency.
Setting range is
C:470pF½4700pF
R:10kΩ½100kΩ.
VREF
TEST
Buffer
PGND
TSD
GND
OVLO
UVLO
Resistor for current.
detecting.
Setting range is
0.1Ω½0.3Ω.
Terminal for testing.
Please connect to
GND.
Fig.1 Block diagram & Application circuit diagram
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© 2012 ROHM Co., Ltd. All rights reserved.
3/8
2012.02 - Rev.A
BD6393FP, BD6395FP
Technical Note
●Points
to notice for terminal description
○PS／Power
save terminal
PS can make circuit standby state and make motor output OPEN. Please be careful because there is a delay of
40μs(max.) before it is returned from standby state to normal state and the motor output becomes ACTIVE.
PS
State
L
H
Standby state (RESET)
ACTIVE
○PHASE1,PHASE2／Logic
input terminal
These terminals decide output state.
PHASEX
OUTXA
L
H
L
H
OUTXB
H
L
○I01,I02,I11,I12／Logic
input terminal for DAC
These terminals decide internal DAC output voltage for current limit.
Output current
I0X
I1X
level(%)
L
L
H
L
L
H
H
H
(I0X,I1X)=(H,H) : motor output are open.
100
67
33
0
●Protection
Circuits
○Thermal
Shutdown (TSD)
This IC has a built-in thermal shutdown circuit for thermal protection. When the IC’s chip temperature rises above
175℃ (Typ.), the motor output becomes OPEN. Also, when the temperature returns to under 150℃ (Typ.), it
automatically returns to normal operation. However, even when TSD is in operation, if heat is continued to be added
externally, heat overdrive can lead to destruction.
○Over
Current Protection (OCP)
This IC has a built in over current protection circuit as a provision against destruction when the motor outputs are
shorted each other or Vcc-motor output or motor output-GND is shorted. This circuit latches the motor output to OPEN
condition when the regulated threshold current flows for 4μs (Typ.). It returns with power reactivation or a reset of the
PS terminal. The over current protection circuit’s only aim is to prevent the destruction of the IC from irregular situations
such as motor output shorts, and is not meant to be used as protection or security for the set. Therefore, sets should
not be designed to take into account this circuit’s functions. After OCP operating, if irregular situations continues and
the return by power reactivation or a reset of the PS terminal is carried out repeatly, then OCP operates repeatly and
the IC may generate heat or otherwise deteriorate. When the L value of the wiring is great due to the wiring being long,
after the over current has flowed and the output terminal voltage jumps up and the absolute maximum values may be
exceeded and as a result, there is a possibility of destruction. Also, when current which is over the output current rating
and under the OCP detection current flows, the IC can heat up to over T
jmax
=150℃ and can deteriorate, so current
which exceeds the output rating should not be applied.
○Under
Voltage Lock Out (UVLO)
This IC has a built-in under voltage lock out function to prevent false operation such as IC output during power supply
under voltage. When the applied voltage to the Vcc terminal goes under 11V (Typ.), the motor output is set to OPEN.
This switching voltage has a 1V (Typ.) hysteresis to prevent false operation by noise etc. Please be aware that this
circuit does not operate during power save mode.
○Over
Voltage Lock Out (OVLO)
This IC has a built-in over voltage lock out function to protect the IC output and the motor during power supply over
voltage. When the applied voltage to the VCC terminal goes over 33V (Typ.), the motor output is set to OPEN. This
switching voltage has a 1V (Typ.) hysteresis and a 4μs (Typ.) mask time to prevent false operation by noise etc.
Although this over voltage locked out circuit is built-in, there is a possibility of destruction if the absolute maximum
value for power supply voltage is exceeded, therefore the absolute maximum value should not be exceeded. Please be
aware that this circuit does not operate during power save mode.
○False
operation prevention function in no power supply (Ghost Supply Prevention)
If a logic control signal is input when there is no power supplied to this IC, there is a function which prevents the false
operation by voltage supplied via the electrostatic destruction prevention diode from the logic control input terminal to
the Vcc, to this IC or to another IC’s power supply. Therefore, there is no malfunction of the circuit even when voltage is
supplied to the logic control input terminal while there is no power supply.
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4/8
2012.02 - Rev.A
BD6393FP, BD6395FP
Technical Note
●Power
dissipation
○HSOP25
Package (BD6393FP/BD6395FP)
HSOP25 has a heat-dissipating FIN terminal on the IC side, but it is possible to greatly increase power dissipation by
taking a large heat dissipation pattern, such as with copper foil, on the back as well as the surface of the board. Also,
this terminal is a GND potential, therefore there is a possibility for malfunction or destruction if it is shorted with any
potential other than GND.
5.0
Measurement machine：TH156（Kuwano Electric）
Measurement condition：ROHM board
3
Board size：70*70*1.6mm
(With through holes on the board)
The exposed metal of the backside is connected to the board with
solder.
2
Board①：1-layer board(Copper foil on the back 0mm )
2
Board②：2-layer board(Copper foil on the back 15*15mm )
2
Board③：2-layer board(Copper foil on the back 70*70mm )
2
Board④：4-layer board(Copper foil on the back 70*70mm )
Board①：θ
ja
=
86℃/W
Board②：θ
ja
=
70℃/W
Board③：θ
ja
=
47℃/W
Board④：θ
ja
=
36℃/W
4.0
3.47W
3.0
4
Power Dissipation：Pd[W]
2.66W
3
2.0
1.79W
2
1.0
1.45W
1
0
100
125
Ambient Temperature:Ta[℃]
Fig. 2 HSOP25 Derating curve
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© 2012 ROHM Co., Ltd. All rights reserved.
5/8
2012.02 - Rev.A
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