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Reversible Motor Drivers for Brush Motors
0.5A or Less Reversible
Motor Driver (Single Motor)
BA6950FS
0.8A Reversible
Motor Driver (Single Motor)
BA6951FS
●Description
These drivers are reversible motor drivers that can directly drive brush motor which require forward and reverse rotations.
Four modes of output setting are available by the use of input logic (2 inputs); forward, reverse, stop (idling), and braking. In
addition, since voltage applied to motors varies in accord with the control terminal, motor rotating speed can be optionally
set and by the built-in current feedback amplifier, the motor can be driven at a constant speed.
●Features
1) Four-mode outputs of forward, reverse, stop (idling), and braking are enabled in compliance with two inputs
2) Motors can be driven at a constant speed by a current feedback amplifier
3) Built-in thermal shutdown circuit
4) Built-in current limiting function (BA6951FS)
●Applications
Audio-visual equipment; PC peripherals; Car audios; Car navigation systems; OA equipments
●Absolute maximum ratings (Ta=25℃, All voltages are with respect to ground)
Parameter Symbol
Supply voltage VCC 8 V
Supply voltage VB 18 V
Output current I
Operating temperature T
Storage temperature T
Power dissipation Pd 0.813*2 W
OMAX
OPR
STG
BA6950FS BA6951FS
0.4*1 0.8*1 A
-20 ~ 75 ℃
-55 ~ 150
Ratings
Unit
℃
No.11008ECT01
Junction temperature T
*1 Do not, exceed Pd or ASO.
*2 SSOP-A16 package. Mounted on a 70mm x 70mm x 1.6mm FR4 glass-epoxy board with less than 3% copper foil.
Derated at 6.4mW/℃ above 25℃.
●Operating conditions (Ta=25℃)
Parameter Symbol Ratings Unit
Supply voltage VCC 3 ~ 6 V
Supply voltage VB 3 ~ 16 V
VTCL voltage V
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150
jmax
0 ~ (VCC-1.8) V
CTL
1/10
℃
2011.05 - Rev.C
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BA6950FS, BA6951FS
●Electrical characteristics (BA6950FS, unless otherwise specified, Ta=25℃ and VCC=4.8V, VB=4.8V)
Parameter Symbol
Supply current 1 I
Supply current 2 I
Supply current 3 I
Input threshold voltage H V
Input threshold voltage L V
Input bias current I
CTL amplifier offset voltage V
CTLOFS
CTL amplifier gain V
CTL output mirror ratio 1 I
CTL output mirror ratio 2 I
CTLR1
CTLR2
CS amplifier offset voltage CS
CS output mirror ratio 1 I
CS output mirror ratio 2 I
Min. Typ. Max.
- 4.0 6.0 mA FWD/REV mode, VCTL=0V
CC1
- 0.7 1.5 mA Standby mode, VCTL=0V
CC2
- 0 1 µA VCC=0V
BOFF
2.0 - VCC V
R/F H
0 - 0.8 V
R/F L
- 80 135 µA FIN=2V, RIN=2V
R/F H
-5 0 5 mV VCTL-RC, VCTL=0V, 1V
40 46 52 µA/V ΔI
CTLGA
0.85 1.00 1.15 ratio I
0.90 1.00 1.10 ratio I
-5 0 5 mV CS1-CS2, CS1=0V, 0.1V
OFS
0.85 1.00 1.15 ratio I
CSR1
0.90 1.00 1.10 ratio I
CSR2
Limits
Unit Conditions
, VCTL=2V, 1V
RT1
, IRC=20µA
RT1/IRC
, IRC=200µA
RT1/IRC
, ICS=20µA
RT2/ICS2
, ICS=200µA
RT2/ICS2
Output high voltage VH 2.0 4.6 - V M1, M2, VCTL=0.2V
Technical Note
Output saturation voltage H VOH - 0.09 0.3 V IO=50mA, RT1=VCC
Output saturation voltage L VOL - 0.07 0.2 V IO=50mA, RT1=VCC
●Electrical characteristics (BA6951FS, unless otherwise specified, Ta=25℃ and VCC=4.8V, VB=4.8V)
Parameter Symbol
Supply current 1 I
Supply current 2 I
Supply current 3 I
Input threshold voltage H V
Input threshold voltage L V
Input bias current I
CTL amplifier offset voltage V
CTLOFS
CTL amplifier gain V
CTL output mirror ratio 1 I
CTL output mirror ratio 2 I
CTLR1
CTLR2
CS amplifier offset voltage CS
CS output mirror ratio 1 I
CS output mirror ratio 2 I
TL-R
offset voltage TL-R
AOFS
Min. Typ. Max.
- 4.0 6.0 mA FWD/REV mode, VCTL=0V
CC1
- 0.7 1.5 mA Standby mode, VCTL=0V
CC2
- 0 1 µA VCC=0V
BOFF
2.0 - VCC V
R/F H
0 - 0.8 V
R/F L
- 80 135 µA FIN=2V, RIN=2V
R/F H
-5 0 5 mV VCTL-RC, VCTL=0V, 1V
40 46 52 µA/V ΔI
CTLGA
0.85 1.00 1.15 ratio I
0.90 1.00 1.10 ratio I
-5 0 5 mV ATC-CS, ATC=0V, 0.1V
OFS
0.85 1.00 1.15 ratio I
CSR1
0.90 1.00 1.10 ratio I
CSR2
6 18 30 mV TL=0.3V, R
AOFS
Limits
Unit Conditions
, VCTL=2V, 1V
RT1
, IRC=20µA
RT1/IRC
, IRC=200µA
RT1/IRC
, ICS=20µA
RT2/ICS
, ICS=200µA
RT2/ICS
ATC
Output high voltage VH 1.85 2.20 2.55 V M1, M2, VCTL=1.0V
=1.0Ω
Output saturation voltage H VOH - 0.28 0.56 V IO=300mA, RT1=VCC
Output saturation voltage L VOL - 0.32 0.64 V IO=300mA, RT1=VCC
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BA6950FS, BA6951FS
Technical Note
●Electrical characteristic curves (Reference data)
5
4
3
2
Supply Current: Icc1 [mA] _
1
34 56
Supply Voltag e: Vcc [V]
Fig.1 Supply current 1 (Forward) Fig.2 Supply current 2 (Standby) Fig.3 Supply current 3
(BA6950FS) (BA6950FS)
5
-20° C
25°C
75°C
0.9
0.8
0.7
-20°C
0.6
Circuit Current: Icc2 [mA] _
0.5
0.4
34 56
Supply Vol tage: Vc c [V]
0.9
25°C
75°C
0.4
0.3
0.2
0.1
Circuit Current: Icc3 [µA] _
0.0
34 56
Supply Vol tage: VB [ V]
400
-20°C
25°C
75°C
4
3
2
Supply Current: Icc1 [mA] _
1
34 56
Supply Voltag e: Vcc [V]
Fig.4 Supply current 1 (Forward) Fig.5 Supply current 2 (Standby) Fig.6 Input bias current
(BA6951FS) (BA6951FS)
5.0
-20° C
25°C
75°C
4.8
4.6
4.4
-20° C
25°C
75°C
4.2
Output High Voltage: VOH [V] _
4.0
0 0.1 0.2 0.3 0.4
Output Current: Iout [A]
Fig.7 Output saturation voltage H Fig.8 Output saturation voltage L Fig.9 Input threshold voltage
(BA6950FS) (BA6950FS)
0.8
0.7
-20°C
0.6
Circuit Current: Icc2 [mA] _
0.5
0.4
34 56
Supply Vol tage: Vc c [V]
1.0
0.8
0.6
0.4
0.2
Output Low Voltage: VOL [V] _
0.0
0 0.1 0.2 0.3 0.4
Output Current: Iout [A]
25°C
75°C
75°C
25°C
-25° C
300
200
100
Input Bias Current: IR/F H [µA] _
0
012345
Input Vol tage: VR/F [V]
5.0
4.0
3.0
2.0
1.0
Output High Voltage: VOH [V] _
0.0
01234
Input Vol tage: VR/F [V]
-25° C
25°C
75°C
75°C
25°C
-25°C
5.0
4.8
4.6
4.4
-20° C
25°C
75°C
1.0
75°C
0.8
0.6
0.4
25°C
-25° C
4.2
Output High Voltage: VOH [V] _
0.2
Output Low Voltage: VOL [V] _
1.5
ii) Mounted on ROHM standard PCB
(70mm x 70mm x 1.6mm FR4 g lass-epox y board)
i) Package only
1.0
ii) 0.813W
Pd [W]
0.5
i) 0.625W
4.0
0 0.2 0.4 0.6 0.8
Output Current: Iout [A]
Fig.10 Output saturation voltage H Fig.11 Output saturation voltage L Fig.12 Thermal derating curve
(BA6951FS) (BA6951FS) (SSOP-A16)
0.0
0 0.2 0.4 0.6 0.8
Output Current: Iout [A]
0.0
0 25 50 75 100 125 150
AMBIEN T TEMPER ATURE [°C ]
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BA6950FS, BA6951FS
●Block diagram and pin configuration
BA6950FS
VCC
12
C5 C6
FIN
10
RIN
5
GND
VCTL
1
2
Table 1 BA6950FS
Pin Name Function
1 GND GND
2 VCTL Control input
3 RC Control gain setting
4 PCT CTL amp phase compensation
5 RIN Control input (reverse)
6 VB Power supply (driver stage)
7 M1 Driver output
8 ATC Current sense pin
9 M2 Driver output
10 FIN Control input (forward)
11 PC Phase compensation
12 VCC Power supply (small signal)
13 CS1 CS amp gain setting
14 CS2 CS amp gain setting
15 RT2 CTL amp gain setting
16 RT1 CTL amp gain setting
CTRL
3
R1 C1
CTRL
AMP
4
VCC
CS
AMP
14
RT2 RT1 CS2 PCT RC
R4
Fig.13 BA6950FS
TSD
PRE
DRIVER
x4
8 15 16
CS1
13
ATC
R5
R2
R3
PC
11
C2
GND
VCTL
RC
PCT
RIN
VB
M1
ATC
Fig.14 BA6950FS (SSOP-A16)
6
7
9
RT1
RT2
CS2
CS1
VCC
PC
FIN
M2
Technical Note
VB
M1
C3
M
M2
C4
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2011.05 - Rev.C