ROHM BA6285AFP-Y

For brush motors
Reversible motor drivers
(1A series)
No.09008EAT02
BA6956AN, BA6287F, BA6285FS, BA6285AFP-Y, BA6920FP-Y
 Overview
The reversible motor driver for output 1.0A for 1 motor can set the output modes to four modes, normal, reverse, stop
(idling), and braking in accordance with logic input (2 inputs).
 Features
1) Built-in surge absorption diode
2) By built-in power save circuit, current consumption when a motor stops (idles) can be suppressed
3) Output voltage can be optionally set by reference voltage setting pin
4) Built-in thermal shutdown circuit (TSD)
 Applications
Audio-visual equipment; PC peripherals; Car audios; Car navigation systems; OA equipments
 Absolute maximum ratings (Ta=25°C, All voltages are with respect to ground)
Parameter
Symbol
Ratings
BA6956AN
BA6287F
BA6285FS
BA6285AFP-Y
BA6920FP-Y
Unit
Supply voltage
VCC
18
18
18
30
36
V
Supply voltage
VM
18
18
18
30
36
V
Output current
IOMAX
1*
1
A
Operating temperature
TOPR
-20 ~ 75
-20 ~ 75
-20 ~ 75
-40 ~ 85
-30 ~ 85
°C
Storage temperature
TSTG
-55 ~ 150
-55 ~ 150
-55 ~ 150
-55 ~ 150
-55 ~ 150
°C
Power dissipation
Junction temperature
*1
*2
*3
*4
*5
1
Pd
1.19*
Tjmax
150
1*
2
1
0.689*
1*
3
150
1
0.813*
1*
4
150
1
1.45*
1*
5
150
1.45*
5
150
W
°C
Do not, exceed Pd or ASO.
SIP9 package. Derated at 9.5mW/°C above 25°C.
SOP8 package. Mounted on a 70mm x 70mm x 1.6mm FR4 glass-epoxy board with less than 3% copper foil. Derated at 5.52mW/°C above 25°C.
SSOP-A16 package. Mounted on a 70mm x 70mm x 1.6mm FR4 glass-epoxy board with less than 3% copper foil. Derated at 6.5mW/°C above 25°C.
HSOP25 package. Mounted on a 70mm x 70mm x 1.6mm FR4 glass-epoxy board with less than 3% copper foil. Derated at 11.6mW/°C above 25°C.
 Operating conditions (Ta=25°C)
Parameter
Symbol
Ratings
BA6956AN
BA6287F
BA6285FS
BA6285AFP-Y
BA6920FP-Y
Unit
Supply voltage
VCC
6.5 ~ 15
4.5 ~ 15
4.5 ~ 15
4.5 ~ 24
6.5 ~ 34
V
Supply voltage
VM
6.5 ~ 15
4.5 ~ 15
4.5 ~ 15
4.5 ~ 24
6.5 ~ 34
V
VREF voltage
VREF
< VCC, VM
< VCC, VM
< VCC, VM
< VCC, VM
< VCC, VM
V
www.rohm.com
c 2009 ROHM Co., Ltd. All rights reserved.
○
1/15
2009.04 - Rev.A
Technical Note
BA6956AN, BA6287F, BA6285FS, BA6285AFP-Y, BA6920FP-Y
 Electrical characteristics (BA6956AN, unless otherwise specified, Ta=25°C and VCC=9V, VM=9V)
Parameter
Symbol
Limits
Min.
Typ.
Max.
Unit
Conditions
Supply current 1
ICC1
-
29
44
mA
FWD/REV mode
Supply current 2
ICC2
-
56
80
mA
Brake mode
Supply current 3
ICC3
-
0
15
µA
Standby mode
Input threshold voltage H
VIH
2.0
-
VCC
V
Input threshold voltage L
VIL
0
-
0.8
V
Input bias current
IIH
50
90
131
µA
VIN=2V
Output saturation voltage
VCE
-
1.7
2.3
V
IO=0.2A, vertically total
VREF bias current
IREF
-
10
25
µA
IO=0.2A, VREF=6V
 Electrical characteristics (BA6287F, unless otherwise specified, Ta=25°C and VCC=9V, VM=9V, VREF=9V)
Parameter
Symbol
Limits
Min.
Typ.
Max.
Unit
Conditions
Supply current 1
ICC1
12
24
36
mA
FWD/REV mode
Supply current 2
ICC2
29
48
67
mA
Brake mode
Standby current
IST
-
0
15
µA
Standby mode
Input threshold voltage H
VIH
2.0
-
VCC
V
Input threshold voltage L
VIL
0
-
0.8
V
Input bias current
IIH
45
90
135
µA
VIN=2V
Output saturation voltage
VCE
-
1.0
1.5
V
IO=0.2A, vertically total
VREF bias current
IREF
6
12
18
mA
IO=0.2A, FWD or REV mode
 Electrical characteristics (BA6285FS, unless otherwise specified, Ta=25°C and VCC=9V, VM=9V, VREF=9V)
Parameter
Symbol
Limits
Min.
Typ.
Max.
Unit
Conditions
Supply current 1
ICC1
12
24
36
mA
FWD/REV mode
Supply current 2
ICC2
29
48
67
mA
Brake mode
Standby current
IST
-
0
15
µA
Standby mode
Input threshold voltage H
VIH
2.0
-
VCC
V
Input threshold voltage L
VIL
0
-
0.8
V
Input bias current
IIH
45
90
135
µA
VIN=2V
Power save on voltage
VPSON
2.0
-
VCC
V
Standby mode
Power save off voltage
VPSOFF
0
-
0.8
V
Operation
Output saturation voltage
VCE
-
1.0
1.5
V
IO=0.2A, vertically total
VREF bias current
IREF
6
12
18
mA
www.rohm.com
c 2009 ROHM Co., Ltd. All rights reserved.
○
2/15
IO=0.2A, FWD or REV mode
2009.04 - Rev.A
Technical Note
BA6956AN, BA6287F, BA6285FS, BA6285AFP-Y, BA6920FP-Y
 Electrical characteristics (BA6285AFP-Y, unless otherwise specified, Ta=25°C and VCC=9V, VM=9V, VREF=9V)
Parameter
Symbol
Limits
Min.
Typ.
Max.
Unit
Conditions
Supply current 1
ICC1
10
20
30
mA
FWD/REV mode
Supply current 2
ICC2
21
42
63
mA
Brake mode
Standby current
IST
-
0
15
µA
Standby mode
Input threshold voltage H
VIH
2.0
-
VCC
V
Input threshold voltage L
VIL
0
-
0.8
V
Input bias current
IIH
40
80
120
µA
VIN=2V
Power save on voltage
VPSON
-
-
0.8
V
Operation
Power save off voltage
VPSOFF
2.0
-
VCC
V
Standby mode
Output saturation voltage
VCE
-
1.0
1.5
V
IO=0.2A, vertically total
VREF bias current
IREF
9
15
21
mA
IO=0.2A, FWD or REV mode
 Electrical characteristics (BA6920FP-Y, unless otherwise specified, Ta=25°C and VCC=12V, VM=12V)
Parameter
Symbol
Limits
Min.
Typ.
Max.
Unit
Conditions
Supply current 1
ICC1
5
8
12
mA
FWD/REV mode
Supply current 2
ICC2
3
5
8
mA
Brake mode
Standby current
IST
-
0
15
µA
Standby mode
Input threshold voltage H
VIH
3.0
-
VCC
V
Input threshold voltage L
VIL
0
-
0.8
V
Input bias current
IIH
100
200
300
µA
VIN=3V
Power save on voltage
VPSON
2.0
-
VCC
V
Standby mode
Power save off voltage
VPSOFF
-
-
0.8
V
Operation
Output saturation voltage
VCE
-
2.2
3.3
V
IO=0.2A, vertically total
VREF bias current
IREF
-
12
35
µA
IO=0.1A, VREF=6V
www.rohm.com
c 2009 ROHM Co., Ltd. All rights reserved.
○
3/15
2009.04 - Rev.A
Technical Note
BA6956AN, BA6287F, BA6285FS, BA6285AFP-Y, BA6920FP-Y
 Electrical characteristic curves (Reference data)
35
30
-20°C
25°C
75°C
25
20
30
70
60
-20°C
25°C
75°C
50
40
6
9
12
6
9
15
4
-20°C
25°C
75°C
45
12
-20°C
25°C
75°C
30
25
6
9
Supply Voltage: Vcc [V]
12
6
20
15
60
50
40
30
24
8
Supply Voltage: Vcc [V]
12
16
20
4
6
24
12
Fig.8 Supply current 2 (brake)
(BA6285AFP-Y)
8
6
-30°C
25°C
85°C
4
36
Supply Voltage: Vcc [V]
Fig.10 Supply current 2 (brake)
(BA6920FP-Y)
www.rohm.com
c 2009 ROHM Co., Ltd. All rights reserved.
○
30
36
9.0
75°C
25°C
-20°C
8.0
7.5
7.0
30
24
Fig.9 Supply current 1 (forward)
(BA6920FP-Y)
Output High Voltage: VOH [V] _
Output High Voltage: VOH [V] _
10
18
Supply Voltage: Vcc [V]
8.5
24
6
Supply Voltage: Vcc [V]
12
18
-30°C
25°C
85°C
2
4
Fig.7 Supply current 1 (forward)
(BA6285AFP-Y)
15
8
-40°C
25°C
85°C
20
20
12
Fig.6 Supply current 2 (brake)
(BA6285FS)
Circuit Current: Icc1 [mA] _
25
12
9
Supply Voltage: Vcc [V]
Fig.5 Supply current 1 (forward)
(BA6285FS)
Circuit Current: Icc2 [mA] _
-40°C
25°C
85°C
6
-25°C
25°C
75°C
45
Supply Voltage: Vcc [V]
30
16
50
15
70
12
55
40
16
35
16
60
35
Fig.4 Supply current 2 (brake)
(BA6287F)
12
Fig.3 Supply current 1 (forward)
(BA6287F)
20
8
8
Supply Voltage: Vcc [V]
Supply Current: Icc2 [mA]_
50
Circuit Current: Icc1 [mA] _
Supply Current: Icc2 [mA]_
55
40
Circuit Current: Icc1 [mA] _
12
40
4
-20°C
25°C
75°C
15
Fig.2 Supply current 2 (brake)
(BA6956AN)
60
8
20
Supply Voltage: Vcc [V]
Fig.1 Supply current 1 (forward)
(BA6956AN)
4
25
10
15
Supply Voltage: Vcc [V]
Circuit Current: Icc2 [mA] _
Circuit Current: Icc1 [mA] _
80
Circuit Current: Icc2 [mA] _
Supply Current: Icc1 [mA]_
40
75°C
25°C
-20°C
8.5
8.0
7.5
0
0.2
0.4
0.6
0.8
1
Output Current: Iout [A]
Fig.11 Output high voltage
(BA6956AN)
4/15
0
0.2
0.4
0.6
0.8
1
Output Current: Iout [A]
Fig.12 Output high voltage
(BA6287F)
2009.04 - Rev.A
Technical Note
BA6956AN, BA6287F, BA6285FS, BA6285AFP-Y, BA6920FP-Y
 Electrical characteristic curves (Reference data) - Continued
9.0
8.5
8.0
7.5
9.0
85°C
25°C
-40°C
8.5
8.0
7.5
0
0.2
0.4
0.6
0.8
1
0.2
0.6
0.8
0.6
0.4
0.2
0.0
0
0.8
0.6
0.4
75°C
25°C
-20°C
0.2
Fig.16 Output low voltage
(BA6956AN)
0.2
0.4
0.6
0.8
0.2
0.0
0
0.2
0.8
0.8
1
Fig.18 Output low voltage
(BA6285FS)
1.5
i) Package only
i) 1.19W
1.0
0.9
0.6
0.5
85°C
25°C
-30°C
0.3
0.0
0
0.2
Output Current: Iout [A]
0.4
0.6
0.8
1
0
25
Output Current: Iout [A]
Fig.19 Output low voltage
(BA6285AFP-Y)
50
75
100
125
150
AMBIENT TEMPERATURE [°C]
Fig.20 Output low voltage
(BA6920FP-Y)
Fig.21 Thermal derating curve
(SIP9)
1.5
3
ii) Mounted on ROHM standard PCB
ii) Mounted on ROHM standard PCB
ii) Mounted on ROHM standard PCB
(70mm x 70mm x 1.6mm FR4 glas s-epox y board)
(70mm x 70mm x 1.6mm FR4 glass -epox y board)
(70mm x 70mm x 1.6mm FR4 glas s -epoxy board)
i) Package only
i) Package only
1.0
0.6
1.2
1
1.5
0.4
Output Current: Iout [A]
0.0
0.6
75°C
25°C
-20°C
0.2
Pd [W]
Output Low Voltage: VOL [V]_
0.4
0.4
0.4
Fig.17 Output low voltage
(BA6287F)
0.6
0.2
0.6
1
1.5
0.8
1
0.8
Output Current: Iout [A]
85°C
25°C
-40°C
0.8
0.0
0
1.0
0.6
Fig.15 Output high voltage
(BA6920FP-Y)
0.8
1
0.4
1.0
Output Current: Iout [A]
0
0.2
Output Current: Iout [A]
0.0
0.6
7.5
1
Output Low Voltage: VOL [V]_
0.8
Output Low Voltage: VOL [V]_
Output Low Voltage: VOL [V]_
0.4
1.0
75°C
25°C
-20°C
0.4
8.0
Fig.14 Output high voltage
(BA6285AFP-Y)
1.0
0.2
8.5
Output Current: Iout [A]
Fig.13 Output high voltage
(BA6285FS)
0
85°C
25°C
-30°C
7.0
0
Output Current: Iout [A]
Output Low Voltage: VOL [V]_
Output High Voltage: VOH [V] _
75°C
25°C
-20°C
Output High Voltage: VOH [V] _
Output High Voltage: VOH [V] _
9.0
i) Package only
1.0
2
ii) 0.689W
0.5
Pd [W]
Pd [W]
Pd [W]
ii) 0.813W
0.5
1
i) 0.625W
i) 0.563W
ii)1.45W
i)0.85W
0.0
0.0
0
25
50
75
100
125
150
0
0
25
50
75
100
125
150
0
25
50
75
100
125
150
AMBIENT TEMPERATURE [°C]
AMBIENT TEMPERATURE [°C]
AMBIENT TEMPERATURE [°C]
Fig.22 Thermal derating curve
(SOP8)
Fig.23 Thermal derating curve
(SSOP-A16)
Fig.24 Thermal derating curve
(HSOP25)
www.rohm.com
c 2009 ROHM Co., Ltd. All rights reserved.
○
5/15
2009.04 - Rev.A
Technical Note
BA6956AN, BA6287F, BA6285FS, BA6285AFP-Y, BA6920FP-Y
 Block diagram and pin configuration
BA6956AN
VM
R1
5
VCC
TSD
FIN
VCC
6
C1
7
CTRL
RIN
R2
VREF
9
1
R3
3
8
4
2
OUT1
GND
RNF
OUT2
M
C2
C3
Fig.25 BA6956AN
Table 1 BA6956AN
3
RNF
Power ground
4
OUT1
Driver output
5
VM
Power supply (driver stage)
6
VCC
Power supply (small signal)
7
FIN
Control input (forward)
8
GND
GND
9
RIN
Control input (reverse)
www.rohm.com
c 2009 ROHM Co., Ltd. All rights reserved.
○
RIN
Driver output
FIN
OUT2
GND
2
VM
Reference voltage setting pin
VCC
VREF
RNF
1
OUT1
Function
OUT2
Name
VREF
Pin
Fig.26 BA6956AN (SIP9)
6/15
2009.04 - Rev.A
Technical Note
BA6956AN, BA6287F, BA6285FS, BA6285AFP-Y, BA6920FP-Y
 Block diagram and pin configuration
BA6287F
VCC
R1
VM
VCC
2
R2
3
C1
TSD
FIN
RIN
6
VREF
ZD
4
CTRL
5
8
1
GND
7
OUT1
OUT2
M
C2
C3
Fig.27 BA6287F
Table 2 BA6287F
Pin
Name
Function
1
OUT1
2
VM
Power supply (driver stage)
3
VCC
Power supply (small signal)
4
FIN
Control input (forward)
Driver output
5
RIN
6
VREF
Reference voltage setting pin
7
OUT2
Driver output
8
GND
GND
OUT1
www.rohm.com
c 2009 ROHM Co., Ltd. All rights reserved.
○
OUT2
VCC
VREF
FIN
Control input (reverse)
GND
VM
RIN
Fig.28 BA6287F (SOP8)
7/15
2009.04 - Rev.A
Technical Note
BA6956AN, BA6287F, BA6285FS, BA6285AFP-Y, BA6920FP-Y
 Block diagram and pin configuration
BA6285FS
VCC
R1
VM
VCC
4
R2
TSD
5
C1
12
FIN
ZD
6
RIN 11
SAVE
POWER
VREF
CTRL
8
16
1
3
14
OUT1
GND
RNF
OUT2
M
C2
C3
Fig.29 BA6285FS
Table 3 BA6285FS
Pin
Name
Function
1
GND
2
NC
3
OUT1
4
VM
Power supply (driver stage)
5
VCC
Power supply (small signal)
6
FIN
Control input (forward)
7
NC
NC
8
PS
Power save enable pin
GND
NC
Driver output
9
NC
NC
10
NC
NC
11
RIN
Control input (reverse)
12
VREF
13
NC
14
OUT2
15
NC
NC
16
RNF
Power ground
GND
NC
OUT1
VM
VCC
FIN
NC
PS
RNF
NC
OUT2
NC
VREF
RIN
NC
NC
Fig.30 BA6285FS (SSOP-A16)
Reference voltage setting pin
NC
Driver output
www.rohm.com
c 2009 ROHM Co., Ltd. All rights reserved.
○
8/15
2009.04 - Rev.A
Technical Note
BA6956AN, BA6287F, BA6285FS, BA6285AFP-Y, BA6920FP-Y
 Block diagram and pin configuration
BA6285AFP-Y
VCC
R1
VM
VCC
16
R2
TSD
17
C1
21
VREF
ZD
FIN 18
RIN 20
CTRL
POWER
19
SAVE
6
FIN
7
GND
8
9
5
OUT1
GND
RNF
OUT2
M
C2
C3
Fig.31 BA6285AFP-Y
Table 4 BA6285AFP-Y
Pin
Name
Function
1
NC
NC
2
NC
NC
3
NC
NC
4
NC
NC
5
OUT2
Driver output
6
RNF
Power ground
7
GND
GND
8
GND
GND
9
OUT1
Driver output
10
NC
NC
11
NC
NC
12
NC
NC
13
NC
NC
14
NC
NC
15
NC
NC
16
VM
Power supply (driver stage)
17
VCC
Power supply (small signal)
18
FIN
Control input (forward)
19
PS
Power save enable pin
20
RIN
Control input (reverse)
21
VREF
22
NC
NC
23
NC
NC
24
NC
NC
25
NC
NC
FIN
GND
NC
NC
NC
NC
OUT2
RNF
GND
GND
GND
OUT1
NC
NC
NC
NC
NC
NC
NC
NC
VREF
RIN
GND
PS
FIN
VCC
VM
NC
NC
Fig.32 BA6285AFP-Y (HSOP25)
Reference voltage setting pin
GND
www.rohm.com
c 2009 ROHM Co., Ltd. All rights reserved.
○
9/15
2009.04 - Rev.A
Technical Note
BA6956AN, BA6287F, BA6285FS, BA6285AFP-Y, BA6920FP-Y
 Block diagram and pin configuration
BA6920FP-Y
16
TSD
17
VM
R1
VCC
C1
FIN 18
R2
RIN 20
CTRL
21
VREF
R3
POWER
19
SAVE
6
FIN
8
9
GND
5
OUT1
RNF
OUT2
M
C2
C3
Fig.33 BA6920FP-Y
Table 5 BA6920FP-Y
Pin
Name
Function
1
NC
NC
2
NC
NC
3
NC
NC
4
NC
NC
5
OUT2
Driver output
6
RNF
Power ground
7
NC
NC
8
GND
GND
9
OUT1
Driver output
10
NC
NC
11
NC
NC
12
NC
NC
13
NC
NC
14
NC
NC
15
NC
NC
16
VM
Power supply (driver stage)
17
VCC
Power supply (small signal)
18
FIN
Control input (forward)
19
PS
Power save enable pin
20
RIN
Control input (reverse)
21
VREF
22
NC
NC
23
NC
NC
24
NC
NC
25
NC
NC
FIN
GND
NC
NC
NC
NC
OUT2
RNF
GND
NC
GND
OUT1
NC
NC
NC
NC
NC
NC
NC
NC
VREF
RIN
GND
PS
FIN
VCC
VM
NC
NC
Fig.34 BA6920FP-Y (HSOP25)
Reference voltage setting pin
GND
www.rohm.com
c 2009 ROHM Co., Ltd. All rights reserved.
○
10/15
2009.04 - Rev.A
BA6956AN, BA6287F, BA6285FS, BA6285AFP-Y, BA6920FP-Y
Technical Note
 External application components
1) Resistor for the current limitation, R1
This is a current limiting resistor for collector loss reduction and at the time of short-circuited output. It depends on the
power supply voltage used, etc., but choose resistance of about 5 to 10Ω. In addition, set resistance with utmost care
to voltage drop caused by inrush current that flows when the motor is started.
2) Resistors and zener diode for the output high voltage setting, R2, R3 and ZD
These are the resistors and zener diode used when output high voltage is set. As for the voltage, only ( VSAT + VF )
lower than the VREF pin voltage for BA6287F, BA6285FS and BA6285AFP-Y. (Reference values; VSAT ≈ 0.25V, VF ≈
0.75V) Zener diode ZD is recommended to be used instead of resistor R3 when the power supply voltage is unstable
for BA6956AN and BA6920FP-Y.
3) Stabilization capacitor for the power supply line, C1
Please connect the capacitor of 1μF to 100μF for the stabilization of the power supply line, and confirm the motor
operation.
4) Phase compensating capacitor, C2, C3
Noise is generated in output pins or oscillation results in accord with the set mounting state such as power supply
circuit, motor characteristics, PCB pattern artwork, etc. As noise oscillation measures, connect 0.01μF to 0.1μF
capacitors.
 Functional descriptions
1) Operation modes
Table 6 Logic table
IN1
IN2
OUT1
OUT2
Operation
L
L
OPEN*
OPEN*
Stop (idling)
H
L
H
L
Forward (OUT1 > OUT2)
L
H
L
H
Reverse (OUT1 < OUT2)
H
H
L
L
Brake (stop)
* OPEN is the off state of all output transistors. Please note that this is the state of the connected diodes, which differs from that of the mechanical relay.
** Output OUT1 and OUT2 become OPEN regardless of the input logic of FIN and RIN when switching to the power save mode with the POWERSAVE pin.
a) Stand-by mode
In stand-by mode, all output power transistors are turned off, and the motor output goes to high impedance.
b) Forward mode
This operating mode is defined as the forward rotation of the motor when the OUT1 pin is high and OUT2 pin is low.
When the motor is connected between the OUT1 and OUT2 pins, the current flows from OUT1 to OUT2.
c) Reverse mode
This operating mode is defined as the reverse rotation of the motor when the OUT1 pin is low and OUT2 pin is high.
When the motor is connected between the OUT1 and OUT2 pins, the current flows from OUT2 to OUT1.
d) Brake mode
This operating mode is used to quickly stop the motor (short circuit brake).
Note) Switching of rotating direction (FWD/REV)
When the rotating direction is changed over by the motor rotating condition, switch the direction after the motor is
temporarily brought to the BRAKE condition or OPEN condition. It is recommended to keep the relevant conditions
as follows:
via BRAKE: Longer than braking time*. (* the time required for the output L terminal to achieve potential below GND when brake is activated.)
via OPEN: The time longer than 1 ms is recommended.
www.rohm.com
c 2009 ROHM Co., Ltd. All rights reserved.
○
11/15
2009.04 - Rev.A
Technical Note
BA6956AN, BA6287F, BA6285FS, BA6285AFP-Y, BA6920FP-Y
2) Output high voltage setting
This function optionally sets output voltage by the output high voltage setting pin and controls the motor rotating speed.
However, when the output high voltage is set to a low level, consumption at IC increases. Carry out thermal design with
sufficient margin incorporated with the power dissipation (Pd) under the actual application condition taken into account.
a) BA6287F, BA6285FS, BA6285AFP-Y
The circuit diagram associated with the output high voltage setting VREF
pin is as per shown on the right. The output high and low voltages VOH and
VOL are expressed by:
VM
VREF
Q1
Q2
VOH = VREF - ( VSAT(Q1) + VF(Q2) )
VOL = VSAT(Q3)
(Reference values; VSAT ≈ 0.15V, VF ≈ 0.7V)
OUT
Q3
RNF
In addition, the relation of VREF voltage to output voltage is expressed by:
(GND, BA6287F)
Fig.35 BA6287F, BD6285FS, BA6285AFP-Y
( VSAT(Q1) + VF(Q2) ) < VREF < VM - VSAT(Q2) + VF(Q2) + VSAT(Q1)
Therefore, when the VREF voltage condition is as follows, the output high voltage is restricted.
VREF > VM - VSAT(Q2) + VSAT(Q1) + VF(Q2)
VOH = VM - VSAT(Q2)
b) BA6956AN, BA6920FP-Y
The circuit diagram associated with the output high
voltage setting VREF pin is as per shown on the right.
The output high and low voltages VOH and VOL are
expressed by:
VM
Q1
VCC
Q1
Q2
Q4
VOH = VREF + ( VF(Q5) + VF(Q4) ) - ( VF(Q2) + VF(Q3) )
VOH ≈ VREF
VOL = VSAT(Q6) (BA6956AN)
VOL = VSAT(Q7) + VF(Q6) (BA6920FP-Y)
(Reference values; VSAT ≈ 0.15V, VF ≈ 0.7V)
VM
VCC
Q2
Q4
Q3
Q3
OUT
VREF
VREF
Q5
Q6
Q7
Q6
RNF
Fig.36 BA6956AN
OUT
Q5
RNF
Fig.37 BA6920FP-Y
The output high voltage controllable range is expressed by:
VREF < VCC - VSAT(Q1) - VF(Q4) - VF(Q5)
VREF < VM - ( VSAT(Q2) + VF(Q3) ) + ( VF(Q2) + VF(Q3)) - ( VF(Q4) + VF(Q5) ) (BA6956AN)
VREF < VM - VSAT(Q3) + ( VF(Q2) + VF(Q3)) - ( VF(Q4) + VF(Q5) ) (BA6920FP-Y)
When the VREF voltage condition is as follows, the output high voltage is restricted.
VREF > VCC - VSAT(Q1) - VF(Q4) - VF(Q5)
VREF > VM - ( VSAT(Q2) + VF(Q3) ) + ( VF(Q2) + VF(Q3)) - ( VF(Q4) + VF(Q5) ) (BA6956AN)
VREF > VM - VSAT(Q3) + ( VF(Q2) + VF(Q3)) - ( VF(Q4) + VF(Q5) ) (BA6920FP-Y)
VOH = VCC - VSAT(Q1) - VF(Q2) - VF(Q3)
VOH = VM - VSAT(Q2) - VF(Q3) (BA6956AN)
VOH = VM - VSAT(Q3) (BA6920FP-Y)
www.rohm.com
c 2009 ROHM Co., Ltd. All rights reserved.
○
12/15
2009.04 - Rev.A
Technical Note
BA6956AN, BA6287F, BA6285FS, BA6285AFP-Y, BA6920FP-Y
 Interfaces
POWER
SAVE
FIN
RIN
(BA6285FS, BA6285AFP-Y, BA6920FP-Y)
Fig. 38 FIN, RIN
Fig.39 POWER SAVE
VM
VM
VM
VCC
VCC
VREF
OUT1
OUT2
OUT1
OUT2
OUT1
OUT2
VREF
VREF
RNF
(BA6956AN)
RNF
(GND, BA6287F)
(BA6287F, BA6285FS, BA6285AFP-Y)
Fig. 40
RNF
(BA6920FP-Y)
VCC, VM, OUT1, OUT2, VREF, RNF, GND
 Notes for use
1) Absolute maximum ratings
Devices may be destroyed when supply voltage or operating temperature exceeds the absolute maximum rating.
Because the cause of this damage cannot be identified as, for example, a short circuit or an open circuit, it is important
to consider circuit protection measures – such as adding fuses – if any value in excess of absolute maximum ratings is
to be implemented.
2) Connecting the power supply connector backward
Connecting the power supply in reverse polarity can damage the IC. Take precautions against reverse polarity when
connecting the power supply lines, such as adding an external direction diode.
3) Power supply lines
Return current generated by the motor’s Back-EMF requires countermeasures, such as providing a return current path
by inserting capacitors across the power supply and GND (10µF, ceramic capacitor is recommended). In this case, it is
important to conclusively confirm that none of the negative effects sometimes seen with electrolytic capacitors –
including a capacitance drop at low temperatures - occurs. Also, the connected power supply must have sufficient
current absorbing capability. Otherwise, the regenerated current will increase voltage on the power supply line, which
may in turn cause problems with the product, including peripheral circuits exceeding the absolute maximum rating. To
help protect against damage or degradation, physical safety measures should be taken, such as providing a voltage
clamping diode across the power supply and GND.
4) Electrical potential at GND
Keep the GND terminal potential to the minimum potential under any operating condition. In addition, check to
determine whether there is any terminal that provides voltage below GND, including the voltage during transient
phenomena. When both a small signal GND and high current GND are present, single-point grounding (at the set’s
reference point) is recommended, in order to separate the small signal and high current GND, and to ensure that
voltage changes due to the wiring resistance and high current do not affect the voltage at the small signal GND. In the
same way, care must be taken to avoid changes in the GND wire pattern in any external connected component.
5) Thermal design
Use a thermal design that allows for a sufficient margin in light of the power dissipation (Pd) under actual operating
conditions.
6) ASO - Area of Safety Operation
When using the IC, set the output transistor so that it does not exceed absolute maximum ratings or ASO.
www.rohm.com
c 2009 ROHM Co., Ltd. All rights reserved.
○
13/15
2009.04 - Rev.A
Technical Note
BA6956AN, BA6287F, BA6285FS, BA6285AFP-Y, BA6920FP-Y
7) Inter-pin shorts and mounting errors
Use caution when positioning the IC for mounting on printed circuit boards. The IC may be damaged if there is any
connection error, or if pins are shorted together.
8) Operation in strong electromagnetic fields
Using this product in strong electromagnetic fields may cause IC malfunctions. Use extreme caution with
electromagnetic fields.
9) Built-in thermal shutdown (TSD) circuit
The TSD circuit is designed only to shut the IC off to prevent thermal runaway. It is not designed to protect the IC or
guarantee its operation in the presence of extreme heat. Do not continue to use the IC after the TSD circuit is activated,
and do not operate the IC in an environment where activation of the circuit is assumed.
10) Capacitor between output and GND
In the event a large capacitor is connected between the output and GND, if VCC and VIN are short-circuited with 0V or
GND for any reason, the current charged in the capacitor flows into the output and may destroy the IC. Use a capacitor
smaller than 0.47μF between output and GND.
11) Testing on application boards
When testing the IC on an application board, connecting a capacitor to a low impedance pin subjects the IC to stress.
Therefore, always discharge capacitors after each process or step. Always turn the IC's power supply off before
connecting it to or removing it from the test setup during the inspection process. Ground the IC during assembly steps
as an antistatic measure. Use similar precaution when transporting or storing the IC.
12) Regarding the input pin of the IC
This monolithic IC contains P+ isolation and P substrate layers between adjacent elements, in order to keep them
isolated. P-N junctions are formed at the intersection of these P layers with the N layers of other elements, creating a
parasitic diode or transistor. For example, the relation between each potential is as follows:
When GND > Pin A and GND > Pin B, the P-N junction operates as a parasitic diode.
When GND > Pin B, the P-N junction operates as a parasitic transistor.
Parasitic diodes inevitably occur in the structure of the IC. The operation of parasitic diodes can result in mutual
interference among circuits, as well as operating malfunctions and physical damage. Therefore, do not use methods by
which parasitic diodes operate, such as applying a voltage lower than the GND (P substrate) voltage to an input pin.
Resistor
Pin A
Pin B
C
Transistor (NPN)
B
Pin A
N
P+
N
P+
P
Parasitic
element
N
N
B
N
P+
P+
P
P substrate
N
C
E
P substrate
GND
Parasitic element
Pin B
E
GND
GND
Parasitic element
GND
Parasitic
element
Other adjacent elements
Appendix: Example of monolithic IC structure
Ordering part number
B
A
ROHM part
number
6
2
Type
6956A
6287
6285
6285A
6920
www.rohm.com
c 2009 ROHM Co., Ltd. All rights reserved.
○
8
5
A
F
P
Package
N: SIP9
F: SOP8
FS: SSOP-A16
FP-Y: HSOP25
14/15
-
Y
-
E
2
Packaging spec.
E2: Embossed taping
None: Container tube
2009.04 - Rev.A
Technical Note
BA6956AN, BA6287F, BA6285FS, BA6285AFP-Y, BA6920FP-Y
SIP9
<Tape and reel information>
<Dimension>
5.8 ± 0.2
2.8 ± 0.2
Tube
1000pcs
Direction
of feed
Direction of products is fixed in a container tube.
1.2
3.5 ± 0.5
10.5 ± 0.5
21.8 ± 0.2
Container
Quantity
1
9
0.6
2.54
0.8
0.3 ± 0.1
1.3
(Unit:mm)
*Orders should be placed in multiples of package quantity.
SOP8
<Tape and reel information>
<Dimension>
Tape
Embossed carrier tape
Quantity
2500pcs
Direction
of feed
E2
(Holding the reel with the left hand and pulling the tape out with the right,
pin 1 will be on the upper left-hand side.)
1234
1234
1234
1234
1234
1234
1234
(Unit:mm)
Direction of feed
1Pin
Reel
*Orders should be placed in multiples of package quantity.
SSOP-A16
<Dimension>
<Tape and reel information>
9
1
8
0.8
0.3Min.
6.2±0.3
1.5±0.1
4.4±0.2
0.11
6.6±0.2
16
Tape
Embossed carrier tape
Quantity
2500pcs
Direction
of feed
E2
(Holding the reel with the left hand and pulling the tape out with the right,
pin 1 will be on the upper left-hand side.)
0.15±0.1
0.1
1234
1234
1234
Direction of feed
1Pin
Reel
(Unit:mm)
1234
1234
1234
1234
0.36±0.1
*Orders should be placed in multiples of package quantity.
HSOP25
<Dimension>
<Tape and reel information>
13.6 ± 0.2
7.8 ± 0.3
0.3Min.
1.95 ± 0.1
13
2000pcs
Direction
of feed
E2
(Holding the reel with the left hand and pulling the tape out with the right,
pin 1 will be on the upper left-hand side.)
0.25 ± 0.1
1234
1234
www.rohm.com
c 2009 ROHM Co., Ltd. All rights reserved.
○
1Pin
1234
(Unit:mm)
1234
Reel
1234
0.1
0.36 ± 0.1
1234
0.8
Embossed carrier tape
1234
0.11
1
1.9 ± 0.1
14
5.4 ± 0.2
25
2.75 ± 0.1
Tape
Quantity
Direction of feed
*Orders should be placed in multiples of package quantity.
15/15
2009.04 - 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,
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
© 2009 ROHM Co., Ltd. All rights reserved.
R0039A