Rohm BA6878EFV Silicon monolithic integrated circuit Datasheet

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STRUCTURE
Silicon monolithic integrated circuits
PRODUCT SERIES
3-phase motor driver for VTR capstan
TYPE
BA6878EFV
FUNCTION
・180°, 3-phase full-wave pseudo-linear drive system
・Built-in current limit and thermal shut down circuits
○Absolute maximum ratings (Ta=25℃)
Parameter
Supply voltage
Symbol
Limit
Unit
VCC
7
V
VM
23
Power dissipation
Pd
1.1※
V
Input voltage
VIN
0~VCC
1
W
V
※2
Maximum output current
IOUT
Operating temperature range
Topr
-25~+75
℃
Storage temperature range
Tstg
-55~+150
℃
Tjmax
150
℃
Junction temperature
1500
mA
※1
70mm×70mm×1.6mm glass epoxy board. Derating in done at 8.8mW/℃ for operating above Ta=25℃.
※2
Do not, however exceed Pd, ASO and Tjmax=150℃.
○Recommended operating conditions (Ta= -25~+75℃)
Parameter
Supply voltage
Hall amp in-phase input voltage range
Symbol
Min
Typ
Max
Unit
VCC
4.5
5.0
5.5
V
VM
4.5
12
22.0
V
VCH
1.5
-
VCC-1.5
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
Symbol
Limit
Min
Typ
Max
Unit
Conditions
CAP Drv
Circuit current
Hall input conversion offset
Torque reference start voltage
Output idling voltage
Torque reference input gain
Icc
-
7.4
11.0
mA
Heofs
-6
0
6
mV
ECst
2.35
2.50
2.65
V
ECidle
-
0
10
mV
Gio
0.64
0.77
0.90
A/V
Ec=GND, input LLH
EC=GND
Forward rotation reference voltage range
VEDF
-
-
2.2
V
Reverse rotation reference voltage range
VEDR
2.8
-
-
V
Torque limit current
ITL
0.89
1.00
1.11
A
RNF=0.5Ω
High output voltage
VOH
1.20
1.55
1.90
V
IOUT=-0.8A
Low output voltage 1
VOL
1.10
1.55
2.00
V
IOUT=0.8A, RNF=0.5Ω,EC<4.5V
Low output voltage 2
VOL2
1.05
1.50
1.95
V
IOUT=0.8A, RNF=0.5Ω,EC=Vcc
Voff
4.5
4.7
4.9
V
FGin- input current
IFGin-
-21
-43
-65
μA
FG Amp Gain1
GFG1
26
33
-
dB
f=500Hz
f=30KHz
Low-side saturation prevention off voltage
FG Amp
FG Amp Gain2
GFG2
26
33
-
dB
DC bias voltage
VBFG
2.4
2.5
2.6
V
High FG output voltage
VFGH
-
0.3
0.6
V
IFG=-0.2mA, VFGH=Vcc-FGout
Low FG output voltage
VFGL
-
0.2
0.5
V
IFG=1mA
Hysteresis width
Vhys
32
46
60
mV
Low hysteresis output voltage
VhysL
-
0.17
0.39
V
Output pull-up resistance
Rhys
15
20
25
kΩ
Hys Amp
REV. B
Ihys=1mA
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○Package outline
Product
No.
BA6878EFV
Lot No.
HTSSOP-B24 (Unit: mm)
○Block diagram
○Pin No. / Pin name
Pin No.
o u tp u t
RNF
A3
A1
A2
A3
VCC
A2
GND
A1
D iffe re n c e D iv id e r
FG out
VM
M a trix
S a tu ra tio n
p re v e n tio n
c irc u it
H a ll A m p
PCI
H 2+
TSD
+
PCV
ECAm p
+C S A m p
+
V re f
TL
EC
H 2-
H 1+
+
R o ta tio n
d e re c tio n
E D /S
H 1-
H 3+
H y so u t
+
-
-
+
H3-
F G in -
V re f
H ys te re s is c o m p a ra to r
FG Am p
N .C .
N .C .
N .C .
N .C .
REV. B
Pin name
1
A3
2
Vcc
3
GND
4
FGout
5
PCI
6
PCV
7
EC
8
ED/S
9
Hysout
10
FGin-
11
N.C
12
N.C
13
N.C
14
N.C
15
H3-
16
H3+
17
H1-
18
H1+
19
H2-
20
H2+
21
VM
22
A1
23
A2
24
RNF
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○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.
This IC exposes its frame of the backside of package. Note that this part is assumed to use after providing heat dissipation
treatment to improve heat dissipation efficiency. Try to occupy as wide as possible with heat dissipation pattern not only on the
board surface but also the backside.
(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.)
Hysteresis temperature [°C] (typ.)
175
25
(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.
REV. B
Notice
Notes
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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
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The Products specified in this document are intended to be used with general-use electronic
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While ROHM always makes efforts to enhance the quality and reliability of its Products, a
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R1120A
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