Rohm BD6382EFV Low voltage stepping motor driver Datasheet

Stepping Motor Driver Series
Low Voltage
Stepping Motor Drivers
BD6382EFV
No.12009EAT02
●Description
This series can drive the bipolar stepping motor used for paper feed carriages. It is a low power consumption bipolar PWM
constant current-drive driver. It is suitable for the mobile devices of a battery drive by power save function. It contributes
also to reduction of mounting area by ultra-thin and high heat-radiation (exposed metal type) HTSSOP package.
●Feature
1)
2)
3)
4)
5)
6)
7)
8)
9)
10)
11)
12)
13)
Low ON resistance DMOS output
PWM constant current control (self oscillation)
Built-in spike noise cancel function (external noise filter is unnecessary)
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)
Malfunction prevention at the time of no applied power supply (Ghost Supply Prevention)
Electrostatic discharge: 4kV (HBM specification)
Adjacent pins short protection
Microminiature, ultra-thin and high heat-radiation (exposed metal type) HTSSOP package
●Application
Mini printer, Handy printer, Monitoring camera, WEB camera, Scanner, Toy, and Robot etc.
●Absolute maximum ratings(Ta=25℃)
Item
Symbol
Ratings
Unit
Supply voltage VCC
VCC
-0.2~+7.0
V
Supply voltage VM
VM
-0.2~+15.0
V
※1
W
※2
W
1.1
Power dissipation
Pd
Input voltage for control pin
VIN
-0.2~(VCC +0.3)
V
VRNF
0.5
V
RNF maximum voltage
4.0
※3
Maximum output current
IOUT
0.8
A/ch
Operating temperature range
Topr
-40~+85
℃
Storage temperature range
Tstg
-55~+150
℃
Junction temperature
Tjmax
150
℃
※1 70mm×70mm×1.6mm glass epoxy board. Derating in done at 8.8mW/℃ for operating above Ta=25℃.
※2 4-layer recommended board. Derating in done at 32.0mW/℃ for operating above Ta=25℃.
※3 Do not exceed Pd, ASO and Tjmax=150℃.
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1/8
2012.02 - Rev.A
Technical Note
BD6382EFV
●Operating conditions (Ta=-25~+75℃)
Item
Symbol
Ratings
Unit
VCC
3.0~5.5
V
Supply voltage VM
VM
4.0~13.5
V
Input voltage for control pin
VIN
0~VCC
V
Output current (DC)
IOUT
0.5※4
A/ch
Supply voltage VCC
※4 Do not exceed Pd, ASO
●Electrical characteristics
Applicable to BD6382EFV(Unless otherwise specified Ta=25℃, VCC=3.3V, VM=6.0V)
Item
Symbol
Limit
Min.
Typ.
Max.
ICCST
-
0
10
Unit
Conditions
Whole
VCC current at standby
VCC current
VM current at standby
VM current
μA
PS=L
ICC
-
1.6
3.0
mA
PS=H, VLIMX=0.5V
IVMST
-
0
10
μA
PS=L
IVM
-
0.08
0.50
mA
PS=H, VLIMX=0.5V
2.0
-
3.3
V
Control input (PS, IN1A, IN1B, IN2A, IN2B)
H level input voltage
VINH
L level input voltage
VINL
0
-
0.8
V
H level input current
IINH
15
30
60
μA
VIN =3V
L level input current
IINL
-10
0
-
μA
VIN =0V
Output (OUT1A, OUT1B, OUT2A, OUT2B)
Output ON resistance
RON
-
1.2
1.5
Ω
Output leak current
ILEAK
-
-
10
μA
IRNF
-40
-20
-
μA
I OUT =±0.3A, V M =6V
Sum of upper and lower
Current control
RNFX input current
SENSEX input current
RNFX=0V
ISENSE
-2.0
-0.1
-
μA
SENSEX=0V
VLIMX input current
IVLIM
-2.0
-0.1
-
μA
VLIMX=0V
VLIMX input voltage range
VVLIM
0
-
0.5
V
Comparator offset voltage
VOFS
-10
-
10
mV
tn
0.3
0.7
1.2
μs
VVREF
0.97
1.00
1.03
V
Noise cancel time
VREF voltage
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2/8
R=39kΩ, C=1000pF
IVREF=0~1mA
2012.02 - Rev.A
Technical Note
BD6382EFV
●Terminal function・Block diagram・Application circuit diagram
1) BD6382EFV
Pin
Pin name
Function
No.
Ground terminal
Pin
No.
Pin name
13
RNF2
Function
1
GND
2
PS
3
VLIM1
Output current limit setting terminal
14
OUT2B
H bridge output terminal
4
SENSE1
Input terminal of current limit comp.
15
OUT2A
H bridge output terminal
5
CR1
Connection terminal of CR for setting
PWM frequency
16
VM2
17
NC
6
IN1A
Logic input terminal
18
IN2B
Logic input terminal
7
IN1B
Logic input terminal
19
IN2A
Logic input terminal
8
NC
9
VM1
20
CR2
Connection terminal of CR for setting
PWM frequency
10
OUT1A
H bridge output terminal
21
SENSE2
Input terminal of current limit comp.
11
OUT1B
H bridge output terminal
22
VLIM2
Output current limit setting terminal
12
RNF1
Connection terminal of resistor for
output current detection
23
VREF
Reference voltage output terminal
24
VCC
Power supply terminal
Power save terminal
Non connection
Power supply terminal for motor
You can devide the
reference voltage by
external resistor, and use
it for output current limit
setting.
Refer to P.7
Connection terminal of resistor for
output current detection
Power supply terminal for motor
Non connection
Bypass capacitor.
Setting range is
4.7uF~47uF(electrolytic)
0.01uF~0.1uF(multilayer ceramic etc.)
Refer to P.6
4.7uF
VCC
VREF
VLIM1
Set the PWM frequency.
Setting range is
C:470pF~4700pF
R:10kΩ~100kΩ
Refer to P.7
24
VREF
23
Current Limit Comp.
3
9
Predriver
CR1
39kΩ
1000pF
10
11
12
5
CR
Timer
4
PS 2
Resistor for current. detecting.
Setting range is
0.1Ω~1.0Ω
Refer to P.7
VM1
OUT1A
OUT1B
RNF1
0.3Ω
SENSE1
UVLO
IN1A 6
IN1B
7
IN2A
19
IN2B
Set the PWM frequency.
Setting range is
C:470pF~4700pF
R:10kΩ~100kΩ
Refer to P.7
0.1uF
Logic
47uF
TSD
OCP
Bypass capacitor.
Setting range is
10uF~470uF(electrolytic)
0.01uF~0.1uF
(multilayer ceramic etc.)
Refer to P.6
18
CR2
39kΩ
1000pF
VLIM2
20
0.1uF
16
CR
Timer
Predriver
15
14
13
VM2
OUT2A
OUT2B
RNF2
0.3Ω
22
Current Limit Comp.
GND
21
SENSE2
Resistor for current. detecting.
Setting range is
0.1Ω~1.0Ω
Refer to P.7
1
Fig.1 Block diagram & Application circuit diagram of BD6382EFV
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3/8
2012.02 - Rev.A
Technical Note
BD6382EFV
●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 40μ
s(max.) before it is returned from standby state to normal state and the motor output becomes ACTIVE at PS=L→H.
If you don't use power save mode, you may short PS terminal to VCC.
PS
State
L
H
Standby state (RESET)
ACTIVE
○IN1A,IN1B,IN2A,IN2B/Logic input terminal
These pins decide output state.
Input
Output
IN1A
IN1B
OUT1A
OUT1B
PS
IN2A
IN2B
OUT2A
OUT2B
L
X
X
OPEN
OPEN
H
L
H
H
H
OPEN
Standby state (RESET)
L
OPEN
Standby
H
L
H
L
Forward
L
H
L
H
Reverse
H
H
L
L
Brake
X: H or L
●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-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 VCC 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 Tjmax=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 1.95V (typ.), the motor output is set to OPEN.
This switching voltage has a 0.25V (typ.) hysteresis to prevent false operation by noise etc. 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 chance of 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
Technical Note
BD6382EFV
●Power dissipation
○HTSSOP-B24 Package
HTSSOP-B24 has exposed metal on the back, and it is possible to dissipate heat from a through hole in the back. Also,
the back of board as well as the surfaces has large areas of copper foil heat dissipation patterns, greatly increasing
power dissipation. The back metal is shorted with the back side of the IC chip, being a GND potential, therefore there is
a possibility for malfunction if it is shorted with any potential other than GND, which should be avoided. Also, it is
recommended that the back metal is soldered onto the GND to short. Please note that it has been assumed that this
product will be used in the condition of this back metal performed heat dissipation treatment for increasing heat
dissipation efficiency.
4.0
Power Dissipation : Pd[W]
3.0
2.0
4.0W
2.8W
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 )
4
3
1.7W
2
1.1W
1
Board①:θja=113.6℃/W
Board②:θja =73.5℃/W
Board③:θja =44.6℃/W
Board④:θja =31.3℃/W
1.0
0
100
125
Ambient Temperature : Ta[℃]
Fig.2 HTSSOP-B24 Derating curve
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5/8
2012.02 - Rev.A
Technical Note
BD6382EFV
●Usage Notes
(1) Absolute maximum ratings
An excess in the absolute maximum ratings, such as supply voltage, temperature range of operating conditions, etc., can
break down the devices, thus making impossible to identify breaking mode, such as a short circuit or an open circuit. If
any over rated values will expect to exceed the absolute maximum ratings, consider adding circuit protection devices,
such as fuses.
(2) Connecting the power supply connector backward
Connecting of the power supply in reverse polarity can damage IC. Take precautions when connecting the power supply
lines. An external direction diode can be added.
(3) Power supply Lines
Design PCB layout pattern to provide low impedance GND and supply lines. To obtain a low noise ground and supply line,
separate the ground section and supply lines of the digital and analog blocks. Furthermore, for all power supply terminals
to ICs, connect a capacitor between the power supply and the GND terminal. When applying electrolytic capacitors in the
circuit, not that capacitance characteristic values are reduced at low temperatures.
(4) GND Potential
The potential of GND pin must be minimum potential in all operating conditions.
(5) Thermal design
Use a thermal design that allows for a sufficient margin in light of the power dissipation (Pd) in actual operating conditions.
Users should be aware that BD6382EFV have been designed to expose their frames at the back of the package, and
should be used with suitable heat dissipation treatment in this area to improve dissipation. As large a dissipation pattern
should be taken as possible, not only on the front of the baseboard but also on the back surface.
(6) Inter-pin shorts and mounting errors
When attaching to a printed circuit board, pay close attention to the direction of the IC and displacement. Improper
attachment may lead to destruction of the IC. There is also possibility of destruction from short circuits which can be
caused by foreign matter entering between outputs or an output and the power supply or GND.
(7) Operation in a strong electric field
Use caution when using the IC in the presence of a strong electromagnetic field as doing so may cause the IC to
malfunction.
(8) ASO
When using the IC, set the output transistor so that it does not exceed absolute maximum ratings or ASO.
(9) Thermal shutdown circuit
The IC has a built-in thermal shutdown circuit (TSD circuit). If the chip temperature becomes Tjmax=150℃, and higher,
coil output to the motor will be open. The TSD circuit is designed only to shut the IC off to prevent runaway thermal
operation. It is not designed to protect or indemnify peripheral equipment. Do not use the TSD function to protect
peripheral equipment.
TSD ON Temperature [℃] (typ.)
Hysteresis Temperature [℃] (typ.)
175
25
(10) Inspection of the application board
During inspection of the application board, if a capacitor is connected to a pin with low impedance there is a possibility
that it could cause stress to the IC, therefore an electrical discharge should be performed after each process. Also, as a
measure again electrostatic discharge, it should be earthed during the assembly process and special care should be
taken during transport or storage. Furthermore, when connecting to the jig during the inspection process, the power
supply should first be turned off and then removed before the inspection.
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2012.02 - Rev.A
Technical Note
BD6382EFV
(11) Input terminal of IC
This IC is a monolithic IC, and between each element there is a P+ isolation for element partition and a P substrate.
This P layer and each element’s N layer make up the P-N junction, and various parasitic elements are made up.
For example, when the resistance and transistor are connected to the terminal as shown in figure 3,
○When GND>(Terminal A) at the resistance and GND>(Terminal B) at the transistor (NPN),
the P-N junction operates as a parasitic diode.
○Also, when GND>(Terminal B) at the transistor (NPN)
The parasitic NPN transistor operates with the N layers of other elements close to the aforementioned
parasitic diode.
Because of the IC’s structure, the creation of parasitic elements is inevitable from the electrical potential relationship. The
operation of parasitic elements causes interference in circuit operation, and can lead to malfunction and destruction.
Therefore, be careful not to use it in a way which causes the parasitic elements to operate, such as by applying voltage
that is lower than the GND (P substrate) to the input terminal.
Resistor
Transistor (NPN)
Pin A
Pin B
C
Pin A
N
P+
N
P
P+
N
Pin B
B
E
N
Parasitic
element
P+
N
P
GND
P+
B
N
E
P substrate
P substrate
Parasitic element
C
Parasitic element
GND
GND
GND
Parasitic
element
Other adjacent elements
Fig.3 Pattern Diagram of Parasitic Element
(12) Ground Wiring Patterns
When using both small signal and large current GND patterns, it is recommended to isolate the two ground patterns,
placing a single ground point at the application's reference point so that the pattern wiring resistance and voltage
variations caused by large currents do not cause variations in the small signal ground voltage. Be careful not to change
the GND wiring pattern potential of any external components, either.
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7/8
2012.02 - Rev.A
Technical Note
BD6382EFV
●Ordering part number
B
D
6
3
8
E
2
F
V
パッケージ
EFV=HTSSOP-B24
形名
-
E2
包装、フォーミング仕様
E2: リール状エンボステーピング
HTSSOP-B24
<Tape and Reel information>
7.8±0.1
(MAX 8.15 include BURR)
(5.0)
1.0±0.2
0.53±0.15
(3.4)
1
0.325
Tape
Embossed carrier tape (with dry pack)
Quantity
2000pcs
Direction
of feed
E2
The direction is the 1pin of product is at the upper left when you hold
( reel on the left hand and you pull out the tape on the right hand
)
12
1PIN MARK
+0.05
0.17 -0.03
S
0.08±0.05
0.85±0.05
1.0MAX
+6°
4° −4°
13
5.6±0.1
7.6±0.2
24
0.65
0.08 S
+0.05
0.24 -0.04
0.08
1pin
M
Reel
(Unit : mm)
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8/8
Direction of feed
∗ Order quantity needs to be multiple of the minimum quantity.
2012.02 - Rev.A
Notice
Notes
No copying or reproduction of this document, in part or in whole, is permitted without the
consent of ROHM Co.,Ltd.
The content specified herein is subject to change for improvement without notice.
The content specified herein is for the purpose of introducing ROHM's products (hereinafter
"Products"). If you wish to use any such Product, please be sure to refer to the specifications,
which can be obtained from ROHM upon request.
Examples of application circuits, circuit constants and any other information contained herein
illustrate the standard usage and operations of the Products. The peripheral conditions must
be taken into account when designing circuits for mass production.
Great care was taken in ensuring the accuracy of the information specified in this document.
However, should you incur any damage arising from any inaccuracy or misprint of such
information, ROHM shall bear no responsibility for such damage.
The technical information specified herein is intended only to show the typical functions of and
examples of application circuits for the Products. ROHM does not grant you, explicitly or
implicitly, any license to use or exercise intellectual property or other rights held by ROHM and
other parties. ROHM shall bear no responsibility whatsoever for any dispute arising from the
use of such technical information.
The Products specified in this document are intended to be used with general-use electronic
equipment or devices (such as audio visual equipment, office-automation equipment, communication devices, electronic appliances and amusement devices).
The Products specified in this document are not designed to be radiation tolerant.
While ROHM always makes efforts to enhance the quality and reliability of its Products, a
Product may fail or malfunction for a variety of reasons.
Please be sure to implement in your equipment using the Products safety measures to guard
against the possibility of physical injury, fire or any other damage caused in the event of the
failure of any Product, such as derating, redundancy, fire control and fail-safe designs. ROHM
shall bear no responsibility whatsoever for your use of any Product outside of the prescribed
scope or not in accordance with the instruction manual.
The Products are not designed or manufactured to be used with any equipment, device or
system which requires an extremely high level of reliability the failure or malfunction of which
may result in a direct threat to human life or create a risk of human injury (such as a medical
instrument, transportation equipment, aerospace machinery, nuclear-reactor controller, fuelcontroller or other safety device). ROHM shall bear no responsibility in any way for use of any
of the Products for the above special purposes. If a Product is intended to be used for any
such special purpose, please contact a ROHM sales representative before purchasing.
If you intend to export or ship overseas any Product or technology specified herein that may
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Thank you for your accessing to ROHM product informations.
More detail product informations and catalogs are available, please contact us.
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R1120A
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