1/4
STRUCTURE
PRODUCT SERIES
TYPE
FUNCTION
Silicon monolithic integrated circuits
3-phase motor driver for VTR capstan
BA6868FM
・
Direct PWM pseudo-linear drive system
・
Built-in torque ripple canceling circuit
○Absolute
maximum ratings (Ta=25℃)
Parameter
Supply voltage
Power dissipation
Input voltage
Maximum output current
Operating temperature range
Storage temperature range
Junction temperature
※
1
※
2
Symbol
VCC
VM
Pd
VIN
IOUT
Topr
Tstg
Tjmax
Limit
7
22
2.20
※
1
Unit
V
V
W
V
mA
℃
℃
℃
0½VCC
1800
※
2
-25½+75
-55½+150
150
70mm×70mm×1.6mm glass epoxy board. Derating in done at 17.6mW/℃ for operating above Ta=25℃.
Do not, however exceed Pd, ASO and Tjmax=150℃.
○Recommended
operating conditions (Ta= -25½+75℃)
Parameter
Supply voltage
Hall amp in-phase input voltage range
Symbol
VCC
VM
VCH
Min
4.5
4.0
1.5
Typ
5
12
-
Max
6.0
20.5
VCC-1.7
Unit
V
V
V
This product described in this specification isn’t judged whether it applies to COCOM regulations.
Please confirm in case of export.
This product isn’t designed for protection against radioactive rays.
REV. B
2/4
○Electrical
characteristics (Unless otherwise specified, Ta=25℃, VCC=5V, VM=12V)
Parameter
Overall
Circuit current
Hall input
Hall input conversion offset
Hall element power supply voltage
Torque reference
Torque reference offset voltage
Torque reference input gain
Output idling voltage
ECR bias voltage
Torque limit
TL-CS offset voltage
Ripple canceling
Ripple canceling rate
Forward / reverse rotation selection
Forward rotation reference voltage range
Reverse rotation reference voltage range
Output
High output voltage
Low output voltage
oscillator
High OSC voltage
Low OSC voltage
Oscillating frequency
VOSCH
VOSCL
FOSC
17
1.0
30
2.1
1.2
50
2.5
1.4
70
V
V
kHz
COSC=1000pF
VOH
VOL
0.63
0.42
0.90
0.60
1.17
0.78
V
V
IOUT=-350mA
IOUT=350mA, RNF=0.5Ω
VEDF
VEDR
-
2.8
-
-
2.2
-
V
V
VRcc
6.3
9.0
11.7
%
Input LLH→LMH
TL-CSofs
39
56
73
½V
ECofs
Gio
ECidle
VECR
-120
0.95
-
2.0
-
1.07
-
2.2
+120
1.18
10
2.4
mV
A/V
mV
V
RNF=0.5Ω
Heofs
VHp
-10
2.45
-
2.65
10
2.85
mV
V
IH+=9mA
Icc
-
11
17
mA
Ec=GND, input LLH
Symbol
Limit
Min
Typ
Max
Unit
Conditions
REV. B
3/4
○Package
outline
Product
No.
BA6868FM
Lot No.
HSOP-M28 (Unit: mm)
○Block
diagram
○Pin
No. / Pin name
Pin No.
1
Saturation prevention
for high and low sides
Hall Amp
Pin name
PCV
SGND
N.C.
OSC
RCC
ECR
CNF
MGND
TL
EC
ED/S
CS
RNF
N.C.
A1
A2
A3
N.C.
VM
Vcc
VH+
H3-
H3+
H1-
H1+
H2-
H2+
PCI
PCV
SGND
N.C.
PCI
H2+
+
-
2
3
4
5
6
7
8
9
10
11
TSD
H2-
A1A2A3
OSC
RCC
oscillation
+
Ripple
cancel
H1+
-
H1-
H3+
ECR
CNF
-
+
+
ECAmp
-
H3-
Rotation
direction
FIN
FIN
12
13
14
MGND
Com
Signal synthesization
Hall
power
supply
VH+
15
VCC
TL
EC
ED/S
+
16
17
18
19
20
21
22
23
24
25
26
27
28
VM
A3
N.C.
CS
RNF
N.C.
-
CSAmp
output
A2
A3
A2
A1
A1
REV. B
4/4
○Operation
Notes
(1) Absolute maximum ratings
Use of the IC in excess of absolute maximum ratings such as the applied voltage or operating temperature range (Topr) may
result in IC damage. Assumptions should not be made regarding the state of the IC (short mode or open mode) when such
damage is suffered. The implementation of a physical safety measure such as a fuse should be considered when use of the IC
in a special mode where the absolute maximum ratings may be exceeded is anticipated.
(2) Power supply lines
Regenerated current may flow as a result of the motor's back electromotive force. Insert capacitors between the power supply
and ground pins to serve as a route for regenerated current. Determine the capacitance in full consideration of all the
characteristics of the electrolytic capacitor, because the electrolytic capacitor may loose some capacitance at low temperatures.
If the connected power supply does not have sufficient current absorption capacity, regenerative current will cause the voltage
on the power supply line to rise, which combined with the product and its peripheral circuitry may exceed the absolute
maximum ratings. It is recommended to implement a physical safety measure such as the insertion of a voltage clamp diode
between the power supply and GND pins.
(3) Ground potential
Ensure a minimum GND pin potential in all operating conditions.
(4) Setting of heat
Use a thermal design that allows for a sufficient margin in light of the power dissipation (Pd) in actual operating conditions.
(5) Actions in strong magnetic field
Use caution when using the IC in the presence of a strong magnetic field as doing so may cause the IC to malfunction.
(6) ASO
When using the IC, set the output transistor for the motor so that it does not exceed absolute maximum ratings or ASO.
(7) Thermal shutdown circuit
This IC incorporates a TSD (thermal shutdown) circuit (TSD circuit). If the temperature of the chip reaches the following
temperature, the motor coil output will be opened. The thermal shutdown circuit (TSD circuit) is designed only to shut the IC off
to prevent runaway thermal operation. It is not designed to protect the IC or guarantee its operation. Do not continue to use the
IC after operating this circuit or use the IC in an environment where the operation of this circuit is assumed.
TSD on temperature [°C] (typ.)
175
(8) Ground Wiring Pattern
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 of
any external components, either.
Hysteresis temperature [°C] (typ.)
65
REV. B
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, commu-
nication 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, fuel-
controller 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
be controlled under the Foreign Exchange and the Foreign Trade Law, you will be required to
obtain a license or permit under the Law.
Thank you for your accessing to ROHM product informations.
More detail product informations and catalogs are available, please contact us.
ROHM Customer Support System
http://www.rohm.com/contact/
www.rohm.com
© 2011 ROHM Co., Ltd. All rights reserved.
R1120A
京公网安备 11010802033920号
EEWORLD
