Datasheet
36VHigh-performance,
High-reliability Withstand Voltage
Stepping Motor Driver
BD63910MUV
General Description
BD63910MUV is a bipolar low-consumption driver that
driven by PWM current. Rated power supply voltage of
the device is 36 V, and rated output current is 1.0 A.
CLK-IN and PARA-IN driving mode is adopted for input
interface, and excitation mode is corresponding to FULL
STEP mode (2 kinds), HALF STEP mode (3 kinds),
QUARTER STEP mode (2 kinds), 1/8 step mode and
1/16 step mode via a built-in DAC. In terms of current
decay, the FAST DECAY/SLOW DECAY ratio may be
set without any limitation, and all available modes may
be controlled in the most appropriate way. In addition,
the power supply may be driven by one single system,
which simplifies the design.
Key Specifications
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Range of power supply voltage
Rated output current (continuous)
Rated output current (peak value)
Range of operating temperature
Output ON resistance (total of
upper and lower resistors)
8½28 [V]
1.0 [A]
1.5 [A]
-25½+85 [℃]
1.3 [Ω] (Typ)
Package
VQFN028V5050
W(Typ) x D(Typ)x H(Max)
5.00mm x 5.00mm x 1.00mm
Features
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■
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■
■
■
■
■
■
■
■
■
■
■
■
■
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Rated output current（DC）1.0A
Low ON resistance DMOS output
CLK-IN and PARA-IN drive mode
PWM constant current (other oscillation)
Built-in spike noise cancel function (external noise
filter is unnecessary)
Full (two kinds)-, half (three kinds)-, quarter (two
kinds)-, 1/8-, 1/16-step functionality
Freely timing excitation mode switch
Current decay mode switch
（linearly
variable FAST/SLOW DECAY ratio）
Normal rotation & reverse rotation switching
function
Power save function
Built-in logic input pull-down resistor
Power-on reset function
Thermal shutdown circuit (TSD)
Over-current protection circuit（OCP）
Under voltage lock out circuit (UVLO)
Over voltage lock out circuit (OVLO)
Ghost Supply Prevention (protects against
malfunction when power supply is disconnected)
Adjacent pins short protection
Microminiature, ultra-thin and high heat-radiation
(exposed metal type) package
VQFN028V5050
Typical Application Circuit
SELECT1
1
SELECT2
2
CLK/PHASE1
5
MODE2/PHASE2
6
MODE1/I01
7
MODE0/I11
CW_CCW/I02
ENABLE/I12
TEST
8
9
10
11
24
23
25
GND
3
PS
VCC1
OUT1A
OUT1B
RNF1
RNF1S
VCC2
OUT2A
OUT2B
RNF2
RNF2S
GND
VREF
28
19
20
21
12
Application
■
■
■
■
■
CR
26
SELECT3
4
MTH
27
13
17
16
15
18
PPC, multi-function printer, laser beam printer, and
ink-jet printer
Monitoring camera and WEB camera
Sewing machine
Photo printer, FAX, scanner and mini printer
Toy and robot
Figure 1. Application circuit diagram
○
Product structure：silicon monolithic integrated circuit
○
It is not the radiation-proof design for this product.
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BD63910MUV
Pin Configuration
[TOP VIEW]
Block Diagram
21
20
19
18
17
16
15
14
13
12
11
10
9
8
N.C.
22
OUT1A
23
VCC1
24
GND
25
CR
26
MTH
27
VREF
28
1
SELECT1
N.C.
OUT2A
VCC2
TEST
SELECT1
1
SELECT2
2
CLK/PHASE1
5
MODE2/PHASE2
6
MODE1/I01
7
MODE0/I11
8
CW_CCW/I02
9
ENABLE/I12
10
TEST
11
VREF
28
＋
－
OUT1B
RNF1S
OUT2B
RNF2S
RNF1
GND
RNF2
TSD
Translator
OVLO
RESET
OCP
UVLO
25
GND
3
PS
DAC
24
VCC1
OUT1A
ENABLE/I12
CW_CCW/I02
MODE0/I11
RNF1S
＋
－
23
19
OUT1B
20
RNF1
＋
Control logic
RNF2S
－
2
SELECT2
3
PS
4
SELECT3
5
CLK/PHASE1
6
MODE2/PHASE2
7
MODE1/IO1
CR
26
SELECT3
4
MTH
27
Blank time
PWM control
OSC
Mix decay
control
Predriver
21
RNF1S
12
VCC2
13
OUT2A
17
OUT2B
16
RNF2
15
RNF2S
Regulator
Figure 2. Pin Configuration Diagram
Figure 3. Block Diagram
18
GND
Pin Description
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Pin name
(CLK/PARA)
Function
(CLK / PARA IN)
Drive mode setting terminal
Motor excitation mode setting terminal
Power save terminal
Decay mode setting terminal
Clock input terminal for advancing the
electrical angle.
/Phase selection terminal
Motor excitation mode setting terminal
/Phase selection terminal
Motor excitation mode setting terminal
/VREF division ratio setting terminal
Motor excitation mode setting terminal
/VREF division ratio setting terminal
Motor rotating direction setting terminal
/VREF division ratio setting terminal
Output enable terminal
/VREF division ratio setting terminal
Terminal for testing
(Used by connecting with GND)
Power supply terminal
H bridge output terminal
No Connection
Pin No.
15
16
17
18
19
20
21
22
23
24
25
26
27
28
Pin name
(CLK/PARA)
Function
(CLK / PARA IN)
Input terminal of current limit
comparator
Connection terminal of resistor for
output current detection
H bridge output terminal
Ground terminal
H bridge output terminal
Connection terminal of resistor for
output current detection
Input terminal of current limit
comparator
No Connection
H bridge output terminal
Power supply terminal
Ground terminal
Connection terminal of CR for setting
chopping frequency
Current decay mode setting terminal
Output current value setting terminal
SELECT1
SELECT2
PS
SELECT3
CLK
/PHASE1
MODE2
/PHASE2
MODE1
/I01
MODE0
/I11
CW_CCW
/I02
ENABLE
/I12
TEST
VCC2
OUT2A
N.C.
RNF2S
RNF2
OUT2B
GND
OUT1B
RNF1
RNF1S
N.C.
OUT1A
VCC1
GND
CR
MTH
VREF
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BD63910MUV
Description of operation
○ SELECT1／Input Mode Switching Terminal
This is the terminal to set the input mode.
SELECT1
Drive Mode
L
H
CLK-IN
Parallel-IN
○ SELECT3／Input Mode Switching Terminal
This is the terminal to set the input mode.
SELECT3
DECAY Mode
L
H
DECAY Mode 1
DECAY Mode 2
●
Input mode in the case of CLK-IN drive (SELECT1=L)
○CLK／Clock input terminal for advancing the electrical angle
CLK is reflected at rising edge. The Electrical angle advances by one for each CLK input.
Motor’s misstep will occur if noise is picked up at the CLK terminal, so please design the pattern in such a way that there is
no noise plunging
○MODE0,MODE1,MODE2,SELECT2／Motor Excitation Mode Setting Terminal (SELECT1=L)
Set the motor excitation mode
MODE0
MODE1
MODE2
SELECT2
Excitation Mode
L
L
L
X
FULL STEP A
H
L
L
X
HALF STEP A
L
H
L
X
HALF STEP B
H
H
L
X
QUARTER STEP A
L
L
H
X
FULL STEP B
H
L
H
X
HALF STEP C
L
H
H
X
QUARTER STEP B
H
H
H
L
1/8 STEP
H
H
H
H
1/16 STEP
※X
: L or H
Please refer to the P.14-18 for the timing chart & motor torque vector of various excitation modes.
Unrelated to CLK, change in setting is forcibly reflected (refer to P.20).
○CW_CCW／Motor rotating direction setting
Set the motor’s rotating direction. Change in setting is reflected at the CLK rising edge immediately after the change in
setting (refer to P.19)
CW_CCW
Rotating direction
L
H
Clockwise (CH2’s current is outputted with a phase lag of 90°in regard to CH1’s current)
Counter Clockwise
(CH2’s current is outputted with a phase lead of 90°in regard to CH1’s current)
○ENABLE／Output enable terminal
Turn off forcibly all the output transistors (motor output is open).
When ENABLE=L, input to CLK is blocked, and phase advance operation of internal translator circuit is stopped.
However, during excitation modes (MODE0,MODE1,MODE2,SELECT2) switch within the interval of ENABLE=L, as
ENABLE=L→H is reset, the new mode upon switch will be applied for excitation (refer to P.20).
ENABLE
Motor Output
L
H
OPEN (electrical angle maintained)
ACTIVE
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BD63910MUV
○PS／Power save terminal
PS can make circuit standby state and make motor output OPEN. In standby state, translator circuit is reset (initialized) and
electrical angle is initialized.
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 (refer to P.13).
PS
Status
L
H
Standby state(RESET)
ACTIVE
The electrical angle (initial electrical angle) of each excitation mode immediately after RESET is as follows
(refer to P.14-16).
Excitation Mode
Initial Electrical Angle
FULL STEP A
HALF STEP A
HALF STEP B
QUARTER STEP A
FULL STEP B
HALF STEP C
QUARTER STEP B
1/8 STEP
1/16 STEP
45°
45°
45°
45°
45°
45°
45°
45°
45°
●
Input mode in the case of Parallel-IN drive (SELECT1=H)
○PS／Power Save Terminal
Setting PS=L will cause the circuit to enter standby state and make motor output OPEN. In standby state, translator circuit,
and electrical angle are initialized. Please take note that there is a delay of 40µs (max) before returning from standby state
to normal state then the motor output becomes ACTIVE.
PS
Status
L
H
Standby state(RESET)
ACTIVE
○PHASE1,PHASE2／Phase selection terminal
PHASE1
PHASE2
OUT1A
L
L
L
H
L
H
L
H
L
H
H
H
○I01,I02,I11,I12／VREF division ratio setting terminal
I0x
L
H
I1x
L
L
OUT1B
H
L
H
L
OUT2A
L
L
H
H
OUT2B
H
H
L
L
Output current level(%)
100
67
33
0
L
H
H
H
(I0X, I1X)=(H, H): motor outputs are open.
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BD63910MUV
○VCC1,VCC2／Power supply terminal
Motor’s drive current is flowing in it, so please wire in such a way that the wire is thick & short and has low impedance.
Voltage VCC may have great fluctuation, so please arrange the bypass capacitor of about 100µ½470µF as close to the
terminal as possible and adjust in such a way that the voltage VCC is stable. Please increase the capacity if needed
especially when a large current is used or those motors that have great back electromotive force are used. In addition, for
the purpose of reducing of power supply’s impedance in wide frequency bandwidth, parallel connection of multi-layered
ceramic capacitor of 0.01µ½0.1µF etc is recommended. Extreme care must be used to make sure that the voltage VCC
does not exceed the rating even for a moment. VCC1 & VCC2 are shorted inside IC, so please be sure to short externally
VCC1 & VCC2 when using. If used without shorting, malfunction or destruction may occur because of concentration of
current routes etc., so please make sure that they are shorted when in use. Still more, in the power supply terminal, there is
built-in clamp component for preventing of electrostatic destruction. If steep pulse or voltage of surge more that maximum
absolute rating is applied, this clamp component operates, as a result there is the danger of destruction, so please be sure
that the maximum absolute rating must not be exceeded. It is effective to mount a Zener diode of about the maximum
absolute rating. Moreover, the diode for preventing of electrostatic destruction is inserted between VCC terminal and GND
terminal, as a result there is the danger of IC destruction if reverse voltage is applied between VCC terminal and GND
terminal, so please be careful.
○GND／Ground terminal
In order to reduce the noise caused by switching current and to stabilize the internal reference voltage of IC, please wire in
such a way that the wiring impedance from this terminal is made as low as possible to achieve the lowest electrical potential
no matter what operating state it may be.
○OUT1A,OUT1B,OUT2A,OUT2B／H Bridge output terminal
Motor’s drive current is flowing in it, so please wire in such a way that the wire is thick & short and has low impedance. It is
also effective to add a Schottky diode if output has positive or negative great fluctuation when large current is used etc, for
example, if counter electromotive voltage etc. is great. Moreover, in the output terminal, there is built-in clamp component
for preventing of electrostatic destruction. If steep pulse or voltage of surge more than maximum absolute rating is applied,
this clamp component operates, as a result there is the danger of even destruction, so please be sure that the maximum
absolute rating must not be exceeded.
○RNF1,RNF2／Connection terminal of resistor for detecting of output current
Please connect the resistor of 0.1Ω½0.3Ω for current detection between this terminal and GND. In view of the power
2
consumption of the current-detecting resistor, please determine the resistor in such a way that W= I
OUT
½R[W]
does not
exceed the power dissipation of the resistor. In addition, please wire in such a way that it has a low impedance and does
not have a impedance in common with other GND patterns because motor’s drive current flows in the pattern through RNF
terminal½current-detecting resistor½GND. Please do not exceed the rating because there is the possibility of circuits’
malfunction etc. if RNF voltage has exceeded the maximum rating (0.7V). Moreover, please be careful because if RNF
terminal is shorted to GND, large current flows without normal PWM constant current control, then there is the danger that
OCP or TSD will operate. If RNF terminal is open, then there is the possibility of such malfunction as output current does
not flow either, so please do not let it open.
○RNF1S,RNF2S／Input terminal of current limit comparator
In this series, RNFS terminal, which is the input terminal of current limit comparator, is independently arranged in order to
decrease the lowering of current-detecting accuracy caused by the wire impedance inside the IC of RNF terminal.
Therefore, please be sure to connect RNF terminal and RNFS terminal together when using in the case of PWM constant
current control. In addition, because the wires from RNFS terminal is connected near the current-detecting resistor in the
case of interconnection, the lowering of current-detecting accuracy, which is caused by the impedance of board pattern
between RNF terminal and the current-detecting resistor, can be decreased. Moreover, please design the pattern in such a
way that there is no noise plunging. In addition, please be careful because if terminals of RNF1S & RNF2S are shorted to
GND, large current flows without normal PWM constant current control and, then there is the danger that OCP or TSD will
operate.
○VREF／Output current value setting terminal
This is the terminal to set the output current value. The output current value can be set by VREF voltage and
current-detecting resistor (RNF resistor).
Output current I
OUT
[A] = {VREF [V] / 5(division ratio inside IC)} / RNF [Ω] . . . (ALL step modes except Full Step B)
Output current I
OUT
[A] = {VREF [V] / 5(division ratio inside IC)}＊0.7071 / RNF [Ω] . . . (Full Step B)
Please avoid using it with VREF terminal open because if VREF terminal is open, the input is unsettled, and the VREF
voltage increases, and then there is the possibility of such malfunctions as the setting current increases and a large current
flows etc. Please keep to the input voltage range because if the voltage of over 3V is applied on VREF terminal, then there
is also the danger that a large current flows in the output and so OCP or TSD will operate. Besides, please take into
consideration the outflow current (max.2μA) if inputted by resistance division when selecting the resistance value. The
minimum current, which can be controlled by VREF voltage, is determined by motor coil’s L & R values and minimum ON
time because there is a minimum ON time in PWM drive.
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