DC Brushless Motor Drivers for Cooling Fans
Two-phase Full-wave
DC Brushless Fan Motor Drivers
No.12010EAT03
BD6701F, BA6406F, BA6506F, BA6901F, BD6712AF
●Description
This is the summary of models for two-phase half-wave fan motor driver. They incorporate lock protection, automatic restart
circuit and FG/AL output. Some of them have variable speed control function, 48V power supply adaptation.
●Feature
1) Power Tr incorporated(BD6701F)
2) Pre-driver(BA6406F、BA6901F、BD6712AF、BA6506F)
3) Variable speed control(BA6901F)
4) Incorporates reverse connection protection diode(BD6701F)
5) Incorporates lock protection and automatic restart circuit
6) Rotation speed pulse signal (FG) output(BD6701F、BA6901F、BD6712AF、BA6506F)
7) Lock alarm signal (AL) output(BD6701F、BA6901F、BD6712AF、BA6406F)
●Applications
For desktop PC, server, general consumer equipment, communication equipment and industrial equipment.
●Lineup
Two-phase half wave
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© 2012 ROHM Co., Ltd. All rights reserved.
Power Tr incorporated
24V power supply
BD6701F
Pre-driver
24V power supply
BA6406F
24V power supply
BA6506F
48V power supply
BD6712AF
48V power supply
BD6712AF
1/28
2012.03 - Rev.A
BD6701F, BA6406F, BA6506F, BA6901F, BD6712AF
Technical Note
●Absolute maximum ratings
◎BD6701FV
Parameter
Supply voltage
Symbol
Limit
Unit
Vcc
36
V
Pd
Power dissipation
*
mW
780
Operating temperature range
Topr
-40~+100
℃
Storage temperature range
Tstg
-55~+150
℃
Iomax
800**
mA
AL signal output current
IAL
10
mA
AL signal output voltage
VAL
36
V
FG signal output current
IFG
10
mA
FG signal output voltage
VFG
36
V
Tjmax
150
℃
Symbol
Limit
Unit
Vcc
30
V
Output current
Junction temperature
*
**
Reduce by 6.24 mW/°C over 25°C. (On 70.0 mm x 70.0 mm x 1.6 mm glass epoxy board)
This value is not to exceed Pd.
◎BA6406F
Parameter
Supply voltage
Power dissipation
Pd
*
mW
624
Operating temperature
Topr
-40~+100
℃
Storage temperature
Tstg
-55~+125
℃
Iomax
70
mA
AL signal output current
IAL
8
mA
AL signal output voltage
VAL
30
V
Tjmax
125
℃
Symbol
Limit
Unit
Vcc
30
V
Output current
Junction temperature
*
Reduce by 6.24 mW/°C over 25°C. (On 70.0 mm x 70.0 mm x 1.6 mm glass epoxy board)
◎BA6506F
Parameter
Supply voltage
Power dissipation
Pd
*
mW
624
Operating temperature
Topr
-40~+100
℃
Storage temperature
Tstg
-55~+125
℃
Iomax
70
mA
FG signal output current
IFG
8
mA
FG signal output voltage
VFG
30
V
Tjmax
125
℃
Output current
Junction temperature
*
Reduce by 6.24 mW/°C over 25°C. (On 70.0 mm x 70.0 mm x 1.6 mm glass epoxy board)
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© 2012 ROHM Co., Ltd. All rights reserved.
2/28
2012.03 - Rev.A
BD6701F, BA6406F, BA6506F, BA6901F, BD6712AF
Technical Note
◎BA6901F
Parameter
Supply voltage
Power dissipation
Symbol
Limit
Unit
Vcc
36
V
Pd
*
mW
625
Operating temperature
Topr
-40~+100
℃
Storage temperature
Tstg
-55~+150
℃
Output current
Iomax
70
mA
FG signal output current
IFG
15
mA
FG signal output voltage
VFG
36
V
AL signal output current
IAL
15
mA
AL signal output voltage
VAL
36
V
Tjmax
150
℃
Symbol
Limit
Unit
Supply voltage
Pd
780*
mW
Power dissipation
Topr
-35~+95
℃
Operating temperature range
Tstg
-55~+150
℃
Iomax
40
mA
Output current
IAL
15
mA
AL signal output current
VAL
60
V
AL signal output voltage
Tjmax
150
℃
Symbol
Limit
Unit
Operating supply voltage range
Vcc
6.0~28.0
V
Hall input voltage range
VH
0~Vcc-3.0
V
Symbol
Limit
Unit
Vcc
4.0~28.0
V
VH
1.0~Vcc-0.5
V
Symbol
Limit
Unit
Junction temperature
*
Reduce by 5.0 mW/°C over 25°C. (On 70.0 mm x 70.0 mm x 1.6 mm glass epoxy board)
◎BAD6712AF
Parameter
Storage temperature range
*
Reduce by 6.24 mW/°C over 25°C. (On 70.0 mm x 70.0 mm x 1.6 mm glass epoxy board)
●Operating Conditions
◎BD6701F
Parameter
◎BA6406F
Parameter
Operating supply voltage range
Hall input voltage range
◎BA6506F
Parameter
Operating supply voltage range
Hall input voltage range
Vcc
4.0~28.0
V
VH
1.0~Vcc-0.5
V
Symbol
Limit
Unit
◎BA6901F
Parameter
Operating supply voltage range
Hall input voltage range
Vcc
3.5~28.0
V
VH
0~Vcc-2.2
V
Symbol
Limit
Unit
◎BD6712AF
Parameter
Operating supply voltage range
Vcc
3.5~Vcz
V
Hall input voltage range
VH
1~30
V
FG output voltage range,AL output voltage range
VSI
0~48
V
Hall input voltage range
VH
0~Vcz-1.5
V
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© 2012 ROHM Co., Ltd. All rights reserved.
3/28
2012.03 - Rev.A
BD6701F, BA6406F, BA6506F, BA6901F, BD6712AF
Technical Note
●Electrical Characteristics
◎BD6701FV(Unless otherwise specified Ta=25℃,Vcc=12V)
Parameter
Circuit current
Symbol
Min.
Limit
Typ.
Max.
Unit
Characteristics
Conditions
Icc
3
6
9
mA
Fig.1
Hall input offset voltage
VHofs
-10
-
10
mV
-
Hall input hysteresis
Vhys
±5
±10
±15
mV
Fig.2
Output L voltage
VOL
-
0.30
0.50
V
Output leak current
IOL
-
-
100
μA
Output zenner voltage
VOZ
50
54
58
V
Lock detection ON time
TON
0.30
0.50
0.70
sec
Lock detection OFF time
TOFF
3.0
5.0
7.0
sec
FG output voltage L
VALL
-
-
0.4
V
FG output leak current
IALL
-
-
50
Fig.3
Io=200mA
-
Vo=45V
Clamp current =10mA
Fig.4
Fig.5
Fig.6
IFG=5mA
Fig.7,8
μA
VFG=36V
Fig.7,8
-
AL output voltage L
VFGL
-
-
0.4
V
IAL=5mA
AL output leak current
IFGL
-
-
50
μA
VAL=36V
Min.
Limit
Typ.
Max.
◎BA6406F(Unless otherwise specified Ta=25℃,Vcc=12V)
Parameter
Circuit current
Symbol
Unit
Conditions
At output OFF
Characteristics
Icc
-
3.2
5.0
mA
Hall input hysteresis
Vhys
±3
-
±15
mV
AL output L voltage
VALL
-
-
0.5
V
IAL=5mA
Fig.12
IAL
8.0
-
-
mA
VAL=2V
-
ILDC
2.0
3.45
5.25
μA
VLD=1.5V
Fig.13
ILDD
0.35
0.80
1.45
μA
VLD=1.5V
Fig.13
rCD
3
4.5
8
-
VLDCL
2.2
2.6
3.0
V
Fig.14
VLDCP
0.4
0.6
0.8
V
Fig.14
VOH
10
10.5
-
V
Min.
Limit
Typ.
Max.
AL current capacity
Charge current of capacitor for
lock detection
Discharge current of capacitor
for lock detection
Charge-discharge current ratio of
capacitor for lock detection
Clamp voltage of capacitor for
lock detection
Comparison voltage of capacitor
for lock detection
Output H voltage
Fig.10
Fig.11
rCD=ILDC/ILDD
Io=10mA
-
Fig.15
◎BA6506F(Unless otherwise specified Ta=25℃,Vcc=12V)
Parameter
Circuit current
Symbol
Unit
Conditions
At output OFF
Characteristics
Icc
-
3.2
5.0
mA
Hall input hysteresis
Vhys
±3
-
±15
mV
FG output L voltage
VALL
-
-
0.5
V
IAL=5mA
Fig.18
IAL
8.0
-
-
mA
VAL=2V
-
ILDC
2.0
3.45
5.25
μA
VLD=1.5V
Fig.19
ILDD
0.35
0.80
1.45
μA
VLD=1.5V
Fig.19
rCD
3
4.5
8
-
VLDCL
2.2
2.6
3.0
V
Fig.20
VLDCP
0.4
0.6
0.8
V
Fig.20
VOH
10
10.5
-
V
FG current capacity
Charge current of capacitor for
lock detection
Discharge current of capacitor
for lock detection
Charge-discharge current ratio of
capacitor for lock detection
Clamp voltage of capacitor for
lock detection
Comparison voltage of capacitor
for lock detection
Output H voltage
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4/28
Fig.16
Fig.17
rCD=ILDC/ILDD
Io=10mA
-
Fig.21
2012.03 - Rev.A
BD6701F, BA6406F, BA6506F, BA6901F, BD6712AF
Technical Note
◎BA6901F(Unless otherwise specified Ta=25℃,Vcc=12V)
Parameter
Circuit current
Hall input hysteresis
Charge current of capacitor for
lock detection
Discharge current of capacitor
for lock detection
Charge-discharge current ratio of
capacitor for lock detection
Clamp voltage of capacitor for
lock detection
Comparison voltage of capacitor
for lock detection
Min.
Limit
Typ.
Max.
Icc
3.0
7.0
12.0
mA
Vhys
±4
±10
±20
mV
Symbol
Unit
Characteristics
Conditions
At output OFF
Fig.22
Fig.23
ILDC
2.0
5.0
8.0
μA
VLD=1.5V
ILDD
0.2
0.5
0.8
μA
VLD=1.5V
rCD
4
10
16
-
VLDCL
1.60
2.40
3.20
V
VLDCP
0.25
0.60
0.95
V
rCD=ILDC/ILDD
Fig.24
Fig.24
Fig.25
Fig.25
Output H voltage
VOH
-
1.5
2.0
V
FG output L voltage
VFGL
-
0.10
0.50
V
Io=-10mA
Voltage between output
and Vcc
IFG=5mA
AL output L voltage
VALL
-
0.10
0.50
V
IAL,IALB=5mA
Fig.28
VofsCS
75.0
92.0
99.5
mV
CL=100mV
Fig.29
TCS
-
50
150
μsec
VPWMH
2.0
-
-
V
At output ON
Fig.30
At output OFF
Fig.30
CL-CS offset voltage
Response time for current limit
PWM input voltage H
PWM input voltage L
Charge-discharge pulse
comparison voltage
Fig.26
Fig.27
-
VPWML
-
-
0.8
V
VCRCP
0.26
0.35
0.44
V
Charge-discharge pulse output
voltage H
VTOH
0.7
1.0
1.3
V
-
Charge-discharge pulse output
voltage L
ITO=-0.5mA
Voltage between output
and Vcc
VTOL
0.7
1.0
1.3
V
ITO=0.5mA
-
Min.
Limit
Typ.
Max.
5.5
6.0
6.5
-
◎BD6712AF (Unless otherwise specified Ta=25℃,Vcc=5V)
Parameter
Internal voltage
Circuit current1
Symbol
Vcz
Icc1
0.5
1.5
3.0
Unit
V
Conditions
Icc=10mA
mA
*
**
Characteristics
Fig.31
Circuit current2
Icc2
4
6.7
9.5
mA
Hall input hysteresis voltage
Vhys
5
15
25
mV
-
Lock detection ON time
TON
0.25
0.5
1
sec
Fig.32
Lock detection OFF time
TOFF
2.5
5
10
sec
Fig.33
Output H voltage
VOH
Vcc
V
Io=-10mA
Fig.34,35
Output L voltage
VOL
-
0.2
0.5
V
Fig.36,37
VFGL
-
0.15
0.5
V
Io=10mA
IFG=5mA
-
FG output L voltage
Vcc-0. Vcc-0.
5
2
Fig.38,39
FG output leak current
IFGL
-
0
10
μA
VFG=48V
AL output L voltage
VALL
-
0.15
0.5
V
IAL=5mA
Fig.38,39
AL output leak current
IALL
-
0
10
μA
VAL=48V
-
*
**
H+:3V,H-:2V,Output,FG,AL terminal are open
Hall-input is 100Hz square wave. Output is connected with 1kΩto ground. FG and AL are connected with 50kΩto Vcc.
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5/28
2012.03 - Rev.A
BD6701F, BA6406F, BA6506F, BA6901F, BD6712AF
Technical Note
●Truth table
◎BD6701F
H+
H-
OUT1
OUT2
FG
H
L
H
H
(Output Tr OFF)
L
(Output Tr ON)
L
(Output Tr ON)
H
(Output Tr OFF)
L
(Output Tr ON)
H
(Output Tr OFF)
L
H+
H-
A1
A2
H
L
L
H
H
(Output Tr ON)
L
(Output Tr OFF)
L
(Output Tr OFF)
H
(Output Tr ON)
H+
H-
A1
A2
FG
H
L
L
H
H
(Output Tr ON)
L
(Output Tr OFF)
L
(Output Tr OFF)
H
(Output Tr ON)
H
(Output Tr OFF)
L
(Output Tr ON)
H+
H-
PWM
A1
A2
FG
H
L
H, OPEN
L
H
H, OPEN
H
L
L
L
H
L
H
(Output Tr ON)
L
(Output Tr OFF)
L
(Output Tr OFF)
L
(Output Tr OFF)
L
(Output Tr OFF)
H
(Output Tr ON)
L
(Output Tr OFF)
L
(Output Tr OFF)
H
(Output Tr OFF)
L
(Output Tr ON)
H
(Output Tr OFF)
L
(Output Tr ON)
H+
H-
OUT1
OUT2
FG
H
L
H
L
L
H
L
H
◎BA6406F
◎BA6506F
◎BA6901F
◎BD6712AF
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6/28
H
(Output Tr OFF)
L
(Output Tr ON)
2012.03 - Rev.A
BD6701F, BA6406F, BA6506F, BA6901F, BD6712AF
Technical Note
●Reference Data
◎BD6701F
BD6701F
Hall input hysteresis, Vhys [mV]
9
6
25℃
-40℃
3
Operating Voltage Range
0
10
25℃
-40℃
0
-40℃
-10
25℃
Operating
Voltage Range
100℃
12
18
24
30
0
6
Supply voltage, Vcc [V]
56
100℃
54
25℃
Operating Voltage Range -40℃
18
24
30
12
18
0.55
100℃
0.50
25℃
-40℃
0.45
24
Operating Voltage Range
6
18
24
100℃
25℃
0.10
-40℃
0.00
2
4
6
100℃
5.0
25℃
-40℃
4.5
Operating Voltage Range
0
8
10
FG/AL current, IFG/IAL [mA]
Fig.7 FG/AL output L voltage
(Temperature characteristics)
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© 2012 ROHM Co., Ltd. All rights reserved.
6
12
18
0.15
6V
0.10
12V
28V
0.05
2
4
6
8
FG/AL current, IFG/IAL [mA]
Fig.8 FG/AL output L voltage
(Voltage characteristics)
7/28
30
Fig.6 Lock detection OFF time
BD6701F
10.0
1.0
0.8
36
0.1
0
24
Supply voltage, Vcc [V]
0.00
0
0.8
5.5
30
BD6701F
0.20
FG/AL low voltage, VFGL/VALL [V]
0.15
0.05
12
Fig.5 Lock detection ON time
BD6701F
-40℃
BD6701F
6.0
Supply voltage,Vcc [V]
Fig.4 Output zenner voltage
0.6
4.0
0
30
0.4
Fig.3 Output L voltage
BD6701F
Supply voltage, Vcc [V]
0.20
0.2
Output current, Io [mA]
Drain current, Ids [A]
6
1
0
0.40
50
FG/AL low voltage, VFGL/VALL [V]
12
0.60
Lock detect ON time, TON [sec]
Output zenner voltage, VOZ [V]
58
0
100℃
Fig.2 Hall input hysteresis
BD6701F
52
2
Supply voltage, Vcc [V]
Fig.1 Circuit current
60
3
0
Lock detect OFF time, TOFF [sec]
6
4
25℃
-20
0
BD6701F
5
100℃
100℃
Circuit current, Icc [mA]
BD6701F
20
Output L voltage, VOL [V]
12
10
0.1
1.0
10.0
100.0
Drain - source voltage, Vds[V]
Fig.9 Output Tr ASO
(Ton=100msec)
2012.03 - Rev.A
BD6701F, BA6406F, BA6506F, BA6901F, BD6712AF
Technical Note
◎BA6406F
3
25℃
2
100℃
1
Operating Voltage Range
0.8
10
100℃
25℃
-40℃
0
-40℃
25℃
-10
100℃
-20
0
0
6
12
18
24
6
Supply voltage, Vcc [V]
Charge/Discharge current, ILDC/ILDD [uA]
100℃
25℃
-40℃
2.0
1.0
-40℃
25℃
100℃
0.0
-1.0
0
6
12
18
24
30
Supply voltage, Vcc [V]
Fig.13 Charge-discharge current of
capacitor for lock detection
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Clamp/Comparate voltage, VLDCL/VLDCP [V]
BA6406F
3.0
-40℃
0.2
12
18
24
30
0
2
6
8
10
Fig.12 AL output L voltage
BA6406F
5.0
4
AL current, IAL[mA]
Fig.11 Hall input hysteresis
Operating Voltage Range
4.0
25℃
0.4
Supply voltage, Vcc [V]
Fig.10 Circuit current
5.0
100℃
0.6
0.0
0
30
BA6406F
1.0
Operating Voltage Range
BA6406F
0.0
100℃
-1.0
4.0
Output voltage, VOH [V]
Circuit current, Icc [mA]
Hall input hysteresis, Vhys [mV]
-40℃
4
BA6406F
20
AL low voltage, VALL [V]
BA6406F
5
3.0
2.0
-40℃
25℃
25℃
-40℃
-2.0
-3.0
-4.0
1.0
100℃
-5.0
0.0
0
6
12
18
24
30
Supply voltage, Vcc [V]
Fig.14 Clamp-comparison voltage
of capacitor for lock detection
8/28
0
20
40
60
80
Output current, Io [mA]
Fig.15 Output H voltage
2012.03 - Rev.A
BD6701F, BA6406F, BA6506F, BA6901F, BD6712AF
Technical Note
◎BA6506F
3
25℃
2
100℃
1
Operating Voltage Range
0.8
10
100℃
25℃
-40℃
0
-40℃
25℃
-10
100℃
-20
0
0
6
12
18
24
6
Supply voltage, Vcc [V]
Charge/Discharge current, ILDC/ILDD [uA]
Clamp/Comparate voltage, VLDCL/VLDCP [V]
BA6406F
4.0
100℃
25℃
-40℃
2.0
1.0
-40℃
25℃
100℃
0.0
-1.0
0
6
12
-40℃
0.2
12
18
24
30
0
2
18
24
30
Supply voltage, Vcc [V]
Fig.19 Charge-discharge current of
capacitor for lock detection
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6
8
10
Fig.18AL output L voltage
BA6406F
5.0
4
AL current, IAL[mA]
Fig.17 Hall input hysteresis
Operating Voltage Range
3.0
25℃
0.4
Supply voltage, Vcc [V]
Fig.16 Circuit current
5.0
100℃
0.6
0.0
0
30
BA6406F
1.0
Operating Voltage Range
BA6406F
0.0
Operating Voltage Range
100℃
4.0
-1.0
Output voltage, VOH [V]
Circuit current, Icc [mA]
Hall input hysteresis, Vhys [mV]
-40℃
4
BA6406F
20
AL low voltage, VALL [V]
BA6406F
5
-40℃
3.0
25℃
2.0
100℃
-40℃
25℃
1.0
25℃
-2.0
-40℃
-3.0
-4.0
100℃
0.0
-5.0
0
6
12
18
24
30
Supply voltage, Vcc [V]
Fig.20 Clamp-comparison voltage
of capacitor for lock detection
9/28
0
20
40
60
80
Output current, Io [mA]
Fig.21 Output H voltage
2012.03 - Rev.A
BD6701F, BA6406F, BA6506F, BA6901F, BD6712AF
Technical Note
◎BA6901F
-40℃
6
4
2
Operating Voltage Range
0
100℃
25℃
10
-40℃
0
100℃
25℃
-10
Operating Voltage Range
-40℃
-20
0
6
12
18
24
30
0
6
Supply voltage, Vcc [V]
BA6901F
2.0
-40℃
25℃
0.0
Operating Voltage Range 100℃
-2.0
0
30
6
12
18
24
30
Supply voltage, Vcc [V]
Fig.24 Charge-discharge current of
capacitor for lock detection
BA6901F
0.0
BA6901F
1.0
100℃
-40℃
25℃
3.0
100℃
2.0
1.0
0.0
-1.0
0.8
-2.0
FG low voltage, VFGL[V]
4.0
Output H voltage, VOH [V]
Clamp/Comparate voltage, VLDCL/VLDCP [V]
24 25℃
Fig.23 Hall input hysteresis
Operating Voltage Range
25℃
-40℃
-3.0
-4.0
-5.0
0
6
12
18
24
30
20
40
60
0.6
0.4
100℃
0.2
25℃
-40℃
0.0
9
25℃
-40℃
0
3
12
15
AL current, IAL[mA]
Fig28 AL Output L voltage
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© 2012 ROHM Co., Ltd. All rights reserved.
6
9
12
15
FG current, IFG[mA]
Fig.27 FG Output L voltage
BA6901F
2.0
-40℃
0.8
-40℃
25℃
100℃
0.5
0.3
1.5
25℃
100℃
1.0
0.5
Operating Voltage Range
Operating Voltage Range
0.0
6
0.2
80
BA6901F
1.0
Offset voltage, VofsCS [mV]
0.8
3
100℃
Fig.26 Output H voltage
BA6901F
0
0.4
Output current, Io [mA]
Fig.25 Clamp-comparison voltage of
capacitor for lock detection
1.0
0.6
0.0
0
Supply voltage, Vcc [V]
AL low voltage, VALL [V]
18
100℃
25℃
-40℃
4.0
Supply voltage, Vcc [V]
Fig.22 Circuit current
5.0
12
BA6901F
6.0
Threshold voltage [V]
Circuit current, Icc [mA]
Hall input hysteresis, Vhys [mV]
25℃
8
BA6901F
20
100℃
Charge/Discharge current, ILDC/ILDD [uA]
BA6901F
10
0.0
0
6
12
18
24
Supply voltage, Vcc[V]
Fig29 CS-CL offset voltage
10/28
30
0
6
12
18
24
30
Supply voltage, Vcc[V]
Fig.30 PWM input threshold voltage
2012.03 - Rev.A
BD6701F, BA6406F, BA6506F, BA6901F, BD6712AF
Technical Note
◎BD6712AF
Lock detect ON time, TON [sec]
-35℃
6
25℃
95℃
4
2
Operating Voltage Range
0
25℃
0.3
0.2
Operating Voltage Range
12
18
24
30
-0.2
12
18
24
25℃
-0.4
95℃
-0.6
-0.8
0
10
20
30
-0.2
28V
-0.4
12V
-0.6
3.5V
-0.8
2
Operating Voltage Range
6
12
18
24
30
BD6712AF
1
0.8
0.6
95℃
25℃
0.4
-35℃
0.2
0
0
40
25℃
Fig.33 Lock detection OFF time
-1
-1
3
Supply voltage, Vcc [V]
BD6712AF
0
Output H voltage, VOH [V]
-35℃
-35℃
0
30
Fig.32 Lock detection ON time
BD6712AF
0
6
Supply voltage, Vcc [V]
Fig.31 Circuit current
95℃
4
1
0
Output L voltage, VOL [V]
6
Supply voltage, Vcc [V]
Output H voltage, VOH [V]
-35℃
0.1
0
10
20
30
40
0
10
20
30
40
Output current, Io [mA]
Output current, Io [mA]
Output current, Io [mA]
Fig.34 Output H voltage
(Temperature characteristics)
Fig.35 Output H voltage
(Voltage characteristics)
Fig.36 Output L voltage
(Temperature characteristics)
BD6712AF
0.8
3.5V
0.6
12V
0.4
28V
0.2
0
BD6712AF
0.4
FG/AL low voltage, VFGL/VALL [V]
1
Output L voltage, VOL [V]
95℃
0.4
BD6712AF
5
0.3
95℃
0.2
25℃
-35℃
0.1
0
0
10
20
30
40
Output current, Io [mA]
Fig.37 Output L voltage
(Voltage characteristics)
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© 2012 ROHM Co., Ltd. All rights reserved.
BD6712AF
0.4
FG/AL low voltage, VFGL/VALL [V]
Circuit current, Icc [mA]
8
BD6712AF
0.5
Lock detect OFF time, TOFF [sec]
BD6712AF
10
0.3
0.2
3.5V
12V
0.1
28V
0
0
2
4
6
8
10
0
2
4
6
8
10
FG/AL current, IFG/IAL [mA]
FG/AL current, IFG/IAL [mA]
Fig.38 FG/AL output L voltage
(Temperature characteristics)
Fig.39 FG/AL output L voltage
(Voltage characteristics)
11/28
2012.03 - Rev.A
BD6701F, BA6406F, BA6506F, BA6901F, BD6712AF
Technical Note
●Block diagram, application circuit, and pin assignment
◎BD6701F
OUT2
1
Connect a pull-up resistor
because open collector output
is set.
GND
8
Lock
Detect
Auto
Restart
AL
Pre Drive
OUT1
2
P.25
7
Set according to the amplitude
of hall element output and hall
input voltage range.
OSC
Take a measure against Vcc voltage
rise generated by reverse connection
of current and back electromotive
force.
FG
H-
3
6
Control
P.25
PIN No.
Terminal
name
1
2
3
4
5
6
7
8
OUT2
AL
FG
Vcc
H+
HOUT1
GND
TSD
HALL
AMP
REG
Vcc
4
P.22
HALL
H+
-
+
5
Function
Motor output terminal 2
Lock alarm signal output terminal
Rotating speed pulse signal output terminal
Power terminal
Hall input terminal+
Hall input terminalMotor output terminal 1
GND terminal
◎BA6406F
Take a measure against Vcc voltage
rise generated by reverse connection
of current and back electromotive
force.
Vcc
1
Output Tr is equipped externally.
Provide a back electromotive force
regenerating current route by Zenner
diode for clamping.
A2
8
P.25
P.25
Set according to the amplitude
of hall element output and hall
input voltage range.
HALL
H+
2
REG
+
-
P.22
7
LOGIC
AL
LD
3
6
Connect a pull-up resistor
because open collector output
is set.
H4
P.25
A1
HALL
AMP
Lock
Detect
Auto
Restart
0.33μF
~4.7μF
Lock detection ON time and lock
detection OFF time can be set.
+
-
GND
+
P.17
5
-
PIN No.
Terminal
name
1
2
3
4
5
6
7
8
Vcc
H+
AL
HGND
LD
A1
A2
Function
Power terminal
Hall input terminal +
Lock alarm signal output terminal
Hall input terminal GND terminal
Lock detection and automatic restart capacitor connecting terminal
Output terminal 1
Output terminal 2
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© 2012 ROHM Co., Ltd. All rights reserved.
12/28
2012.03 - Rev.A
BD6701F, BA6406F, BA6506F, BA6901F, BD6712AF
Technical Note
◎BA6506F
Take a measure against Vcc voltage
rise generated by reverse connection
of current and back electromotive
force.
Vcc
1
Output Tr is equipped externally.
Provide a back electromotive force
regenerating current route by Zenner
diode for clamping.
A2
8
P.25
P.25
Set according to the amplitude
of hall element output and hall
input voltage range.
HALL
H+
2
REG
HALL
AMP
+
-
P.22
7
LOGIC
FG
LD
3
6
Connect a pull-up resistor
because open collector output
is set.
H4
P.25
A1
Lock
Detect
Auto
Restart
0.33μF
~4.7μF
Lock detection ON time and lock
detection OFF time can be set.
+
-
GND
+
P.17
5
-
PIN No.
Terminal
name
1
2
3
4
5
6
7
8
Vcc
H+
FG
HGND
LD
A1
A2
Function
Power terminal
Hall input terminal +
Rotating speed pulse signal output terminal
Hall input terminal GND terminal
Lock detection and automatic restart capacitor connecting terminal
Output terminal 1
Output terminal 2
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13/28
2012.03 - Rev.A
BD6701F, BA6406F, BA6506F, BA6901F, BD6712AF
Technical Note
◎BA6901F
Incorporates
charging
and
discharging pulse circuit and enables
speed control corresponding to
ambient temperature with use of
thermistor.
TOUT
CR
P.19
+
1
0.1μF
~4.7μF
FG
Vcc
2
15
AL
3
Lock
Detect
Auto
Restart
ALB
by
4
P.18
A2
A2
0.47μF
~4.7μF
5
6
A1
A1
13
8
Terminal
name
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
CR
FG
AL
ALB
PWM
LD
CNF
GND
H+
HCS
CL
A1
A2
Vcc
TOUT
+
P.20
12
~5Ω
CS
-
H-
-
+
+
-
10
H+
9
Output current detecting resistor. Pay
attention to wattage because large
current is present
P.20
11
+
CNF
GND
P.20
PIN No.
PWM
7
Phase compensating capacitor
when current is limited.
Current limit setting resistor.
CL
LD
0.001μF
~0.1μF
P.17
P.25
14
PWM
Lock detection ON time and lock
detection OFF time can be set.
Output Tr is equipped externally.
Provide a back electromotive force
regenerating current route by Zenner
diode for clamping.
REG
P.25
control
P.25
16
-
LOGIC
Incorporates power supply
clamp circuit and enables
application of high voltage.
Enables speed
pulse input.
Take a measure against Vcc voltage
rise generated by reverse connection
of current and back electromotive
force.
5kΩ
~200kΩ
HALL
Set according to the amplitude
of hall element output and hall
input voltage range.
P.22
Function
Charging and discharging pulse circuit capacitor and resistor connecting terminal
Rotating speed pulse signal output terminal
Lock alarm signal output terminal
Lock alarm signal terminal(inversion signal of AL)
PWM input terminal(H or OPEN:Output ON, L:Output OFF)
Lock detection and automatic restart capacitor connecting terminal
Phase compensating capacitor connecting terminal
GND terminal
Hall input terminal +
Hall input terminal Current detecting input terminal
Current limiting input terminal
Output terminal 1
Output terminal 2
Power terminal
Charging and discharging pulse output terminal
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© 2012 ROHM Co., Ltd. All rights reserved.
14/28
2012.03 - Rev.A
BD6701F, BA6406F, BA6506F, BA6901F, BD6712AF
Technical Note
◎BD6712AF
Take a measure against Vcc voltage
rise generated by reverse connection
of current and back electromotive
force.
P25
Incorporates power supply
clamp circuit and enables
application of high voltage.
0Ω
~100kΩ
Vcc
OUT2
1
8
REG
P.21
TSD
OUT1
H+
HALL
2
Set according to the amplitude
of hall element output and hall
input voltage range..
+
-
Control
FG
AL
3
Connect a pull-up resistor
because open collector output
is set.
P.25
Terminal
name
1
2
3
4
5
6
7
8
Vcc
H+
AL
HGND
FG
OUT1
OUT2
P.25
HALL
AMP
P.22
PIN No.
7
Output Tr is equipped externally.
Provide a back electromotive force
regenerating current route by Zenner
diode for clamping
Lock
Detect
Auto
Restart
6
H-
GND
4
5
Connect a pull-up resistor
because open collector output
is set.
P.25
Function
Power terminal
Hall input terminal+
Lock alarm signal output terminal
Hall input terminal
GND terminal
Rotating speed pulse signal output terminal
Output terminal 1
Output terminal 2
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© 2012 ROHM Co., Ltd. All rights reserved.
15/28
2012.03 - Rev.A
BD6701F, BA6406F, BA6506F, BA6901F, BD6712AF
Technical Note
●Description of operations
Function table
BD6701F
Lock
protection auto
restart
Incorporated
counter
CR timer
BA6406F
BA6506F
BA6901F
BD6712AF
Reference
page
〇
P.16
〇
〇
P.17
PWM input
〇
P.18
Variable speed control
〇
Current limit circuit
〇
〇
〇
Supply voltage clamping circuit
FG output
〇
AL output
〇
〇
〇
P.18,
19
P.20
〇
P.21
〇
〇
P.25
〇
〇
P.25
1) Lock protection and automatic restart
○Incorporated counter system <BD6701F、BD6712AF>
Motor rotation is detected by hall signal, and lock detection ON time (TON) and lock detection OFF time (TOFF) are set
by IC internal counter. Timing chart is shown in Fig.40.
H+
TOFF
OUT1
TON
Output Tr OFF
ON
OUT2
FG
Hi (Open collector)
AL
Recovers
Motor
Lock
Lock
release normal operation
locking detection
Fig.40 Lock protection (incorporated counter system) timing chart
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© 2012 ROHM Co., Ltd. All rights reserved.
16/28
2012.03 - Rev.A
BD6701F, BA6406F, BA6506F, BA6901F, BD6712AF
Technical Note
○CR timer system <BA6406F、BA6506F、BA6901F>
Charging and discharging time at LD terminal depends on the capacitor equipped externally on LD terminal. Charging
and discharging time is determined as follows:
C×(VLDCL-VLDCP)
TON(charging time) =
ILDC
C×(VLDCL-VLDCP)
TOFF(discharging time)=
C
VLDCL
VLDCP
ILDC
ILDD
:
:
:
:
:
ILDD
Capacity of capacitor equipped externally on LD terminal
LD terminal clamping voltage
LD terminal comparator voltage
LD terminal charging current
LD terminal discharging current
For reference, charging and discharging time when C = 1.0μF can be calculated as follows(BA6901F);
Charging time=0.36sec(output ON)
Discharging time=3.6sec(output OFF)
Timing chart of LD terminal is shown in Fig.41.
H-
A1
TOFF
LD terminal clamping
voltage
LD
Output Tr OFF
TON
ON
LD terminal comparator
voltage
HIGH(open collector)
AL
FG
Motor Lock
locking detection
Lock
release
Recovers normal
operation
Fig.41 Lock protection (CR timer system) timing chart
When the motor is locked with hall input terminal (H-) in Lo status, FG logic is reversed.
AL might be high for few hundred ms in turning on. (BA6406F)
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© 2012 ROHM Co., Ltd. All rights reserved.
17/28
2012.03 - Rev.A
BD6701F, BA6406F, BA6506F, BA6901F, BD6712AF
Technical Note
3) PWM terminal <BA6901F>
The signal input to PWM terminal is below L (0.8V or less), output (A1 and A2) turns off. And when it is above H (2.0V or
more), output turns on. PWM terminal is pulled up by resistor (30kΩ:typ.) inside IC. When it is open, the output is in
operating mode.
H+
PWM
A1
A2
FG
Fig.42 Timing chart in PWM control
4) Charging and discharging pulse circuit compatible with temperature variable speed control <BA6901F>
When an external capacitor and resistor are connected to CR terminal, saw wave is generated by charging and
discharging of capacitor corresponding to the cycle of hall signal. Saw wave of CR terminal changes with the external
capacitor and resistor. Waveform of CR terminal is output to TOUT by buffer amplifier.
CR terminal is variable from VCRCP (0.35V:typ., see the electric characteristics) to Vcc. When CR voltage is above
Vcc-VTOH (1V:typ., see the electric characteristics), CR terminal signal is not output to TOUT terminal as shown in
Fig.43.
Hall input
Hall input
Vcc-VTOH
(typ.:Vcc-1V)
CR
Vcc-VTOH
(typ.:Vcc-1V)
VCRCP
(typ.:0.35V)
CR
VCRCP
(typ.:0.35V)
Vcc-VTOH
(typ.:Vcc-1V)
TOUT
VTOL
(typ.:1V)
TOUT
VTOL
(typ.:1V)
Fig.43 CR terminal and TOUT terminal timing chart
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© 2012 ROHM Co., Ltd. All rights reserved.
18/28
2012.03 - Rev.A
BD6701F, BA6406F, BA6506F, BA6901F, BD6712AF
Technical Note
5) Variable speed control application <BA6901F>
This is an example of the application which makes the fan motor rotating speed variable corresponding to ambient
temperature with thermistor by use of charging and discharging pulse circuit and PWM input.
TOUT
CR
16
+
1
-
Vcc
FG
15
2
REG
3
LOGIC
AL
Lock
Detect
Auto
Restart
ALB
4
14
A1
13
A1
CL
PWM
+
-
VTH
Thermistor
5
12
PWM
-
LD
6
A2
A2
+
CS
11
+
-
CNF
H-
7
10
GND
8
-
+
+
-
H+
HALL
9
Fig. 44 Example of temperature variable speed application
VTH
TOUT
PWM
A1
A2
Fig. 45 Temperature variable speed timing chart
When the temperature becomes the lower and the thermistor terminal voltage the higher, PWM pulse becomes the
shorter and speed is reduced as shown in Fig. 45.
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© 2012 ROHM Co., Ltd. All rights reserved.
19/28
2012.03 - Rev.A
BD6701F, BA6406F, BA6506F, BA6901F, BD6712AF
Technical Note
6) Current limiting circuit <BA6901F>
Output current limitation can be set by the voltage (VCL) input to CL terminal. Connect a resistor (RNF) for detecting
output current between the emitter of external output transistor and GND, and input the voltage generated by resistor to
CS terminal, thereby detecting the output current. The output current is limited so that CL terminal and CS terminal has
the same potential. There is an offset between CL terminal and CS terminal. Current limiting value can be calculated by
the formula below:
Current limiting
value =
VCL-VofsCS
RNF
VofsCS = CL-CS offset
When limiting the output current, capacitor for phase compensation must be connected between CNF terminal and Vcc
terminal. When the output current is not to be limited, fix CL terminal voltage to High level (Vcc) and CS terminal to Low
level (GND).
CNF
Vcc
CNF
Vcc
A1
A1
A2
A2
CS
CS
CL
Current limiting
CL
(a) When current limiting is applied
(b) When current limiting is not applied
Fig.46 External circuit of output
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20/28
2012.03 - Rev.A
BD6701F, BA6406F, BA6506F, BA6901F, BD6712AF
Technical Note
7) Power supply voltage clamping circuit <BD6712AF>
When the external supply voltage exceeds supply clamping voltage Vcz (see the electric characteristics), supply
clamping turns on. Adjust the capacity of bypass capacitor (C2) so that the transient peak voltage does not exceed the
maximum of supply clamping voltage at IC power supply terminal (Vcc).
When you use the external supply voltage above supply clamping voltage, insert the limiting resistor (R1) between the
external supply and IC supply terminal. Set the limiting resistor (R1) so that Icc does not exceed the operation power
supply amperage.
Example of calculation for BD6712AF is shown below:
External supply voltage
:VS
Supply clamping voltage
:Vcz=6V(typ.)
Hall current limiting resistor
:R2
Supply current limiting resistor :R1
Circuit crrent
:Icc
Hall element current
:IH
:Vcc
Hall element resistance
:RH
Supply terminal voltage
Then,
VS - Vcc
Icc + IH
R1 =
Icc
R1
VS
1
Vcc
OUT2
C2
IH
・・・①
8
REG
R2
TSD
2
H+
+
-
RH
3
4
Control
OUT1
FG
AL
7
HALL
AMP
Lock
Detect
Auto
Restart
GND
H-
6
5
Fig.47 Example of supply voltage clamping application circuit
Assuming R2 = 2kΩ and RH = 0.5kΩ, IH is calculated as follows:
Vcc
IH =
・・・②
R2 + RH
= 6V / (2kΩ+0.5kΩ)
= 2.4mA
Icc has minimum 4mA and maximum 30mA, therefore the minimum and maximum value of R1 is calculated as follows
by the formula ①:
VS
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© 2012 ROHM Co., Ltd. All rights reserved.
R1 Min. value
R1 Max. value
5V
0Ω
0kΩ
24V
550Ω
2.8kΩ
48V
1.3kΩ
6.6kΩ
21/28
2012.03 - Rev.A
BD6701F, BA6406F, BA6506F, BA6901F, BD6712AF
Technical Note
8) Hall input setting
Hall input voltage range is shown in operating conditions.
Hall input voltage range
Vcc
Hall input voltage range upper limit
Hall input voltage range lower limit
GND
Fig.48 Hall input voltage range
Adjust the hall element bias resistor R1 and R2 in Fig.49 so that the input voltage at hall amplifier is input in "hall input
voltage range" including the amplitude of signal.
For a model having hall input voltage range lower limit 0V,R2 = 0Ωis acceptable.
○Reduction of noise of hall signal
Hall element may be affected by Vcc noise or the like depending on the wiring pattern of board. In this case, place a
capacitor like C1 in Fig.49. In addition, when wiring from the hall element output to IC hall input is long, noise may be
loaded on wiring. In this case, place a capacitor like C2 in Fig.49.
H-
H+
Vcc
C2
R1
RH
R2
C1
Hall element
Hall bias current = Vcc / (R1+R2+RH )
Fig.49 Application near of hall signal
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22/28
2012.03 - Rev.A
BD6701F, BA6406F, BA6506F, BA6901F, BD6712AF
Technical Note
●Equivalent circuit
◎BD6701F
1) Hall input terminal
2) Output terminal
OUT1
Vcc
OUT2
1kΩ
1kΩ
3 FG output terminal
4) AL output terminal
FG
AL
◎BA6406F
1) Hall input terminal
2) Output terminal
3)AL signal output terminal
Vcc
H+
1kΩ
1kΩ
AL
H-
A1,A2
15kΩ
◎BA6506F
1) Hall input terminal
2) Output terminal
3)FG signal output terminal
Vcc
H+
1kΩ
1kΩ
FG
H-
A1,A2
15kΩ
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© 2012 ROHM Co., Ltd. All rights reserved.
23/28
2012.03 - Rev.A
BD6701F, BA6406F, BA6506F, BA6901F, BD6712AF
◎BA6901F
1) Hall input terminal
Technical Note
2) Current limiting input terminal
Output current detecting terminal
3) Charge-discharge pulse
output terminal
Vcc
Vcc
Vcc
30Ω
1kΩ
1kΩ
H+
H-
1kΩ
CS
4) PWM input terminal
1kΩ
30Ω
1kΩ
CL
Vcc
TOUT
5) Output terminal
6) Signal output terminal
FG、AL、ALB
Vcc
30kΩ
1kΩ
PWM
A1, A2
100kΩ
15kΩ
GND
◎BD6712AF
1) Hall input terminal
2) Output terminal
Vcc
Vcc
H+
H-
OUT1
1kΩ
1kΩ
1kΩ
OUT2
1kΩ
3) FG output terminal or AL output terminal
4) Power supply terminal
FG
or
AL
Vcc
50kΩ
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© 2012 ROHM Co., Ltd. All rights reserved.
24/28
2012.03 - Rev.A
BD6701F, BA6406F, BA6506F, BA6901F, BD6712AF
Technical Note
●Safety measure
1) Reverse connection protection diode
Reverse connection of power results in IC destruction as shown in Fig 50. When reverse connection is possible, reverse
connection protection diode must be added between power supply and Vcc.
Reverse power connection
In normal energization
Vcc
After reverse connection
destruction prevention
Vcc
Vcc
Circuit
block
Circuit
block
Each
pin
GND
Internal circuit impedance high
amperage small
Circuit
block
Each
pin
GND
Large current flows
Thermal destruction
Each
pin
GND
No destruction
Fig.50 Current flow when power is connected reversely
*As for BD6701F, this diode is built-in in the IC, so a protection diode between power supply -Vcc terminal is unnecessary.
2) About measures of voltage rise by back electromotive force
The voltage of output terminal rises by back electromotive force. The diode D1 of Fig.51 is necessary to divide a power
supply line of motor with small signal line, so that the voltage of the output does not affect a power supply line.
D1
IC
Fig.51 Separation of a power supply line
The models that incorporate power Tr (BD6701F) have the circuit, which clamps the output voltage so that back
electromotive force does not exceed the maximum rating voltage of output Tr.
3) FG, AL output
Vcc
FG /AL
Pull-up
resistor
Protection
resistor R1
Connector
of board
Fig.52 Protection of FG and AL terminal
FG and AL output is an open collector and requires pull-up resistor.
The IC can be protected by adding resistor R1. An excess of absolute maximum rating, when FG or AL output terminal
is directly connected to power supply, could damage the IC.
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BD6701F, BA6406F, BA6506F, BA6901F, BD6712AF
Technical Note
4) Problem of GND line PWM switching
Do not perform PWM switching of GND line because GND terminal potential cannot be kept to a minimum.
Vcc
Motor
Driver
GND
Controller
PWM input
Prohibite
Fig.53 GND Line PWM switching prohibited
●Calculation of power consumption by IC
Power consumption of this IC is approximately calculated as follows:
Pc=Pc1+Pc2+Pc3
・Pc1:Power consumption by circuit current
Pc1=Vcc×Icc
・Pc2:Power consumption on output stage
Pc2=VOL×Io
VOL is the L voltage of output terminal 1 and 2.
Io is the current flowing to output terminal 1 and 2.
・Pc3:Power consumption at FG and AL
Pc3=VFG×IFG+VAL×IAL
VFG is L voltage of FG output.
VAL is L voltage of AL output.
IFG and IAL are the current of FG and AL.
Vcc
Icc
FG
IFG
OUT1
OUT2
Io
Fig.54 Calculation of power consumption by IC
Power consumption by IC greatly changes with use condition of IC such as power supply voltage and output current.
Consider thermal design so that the maximum power dissipation on IC package is not exceeded.
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2012.03 - Rev.A
BD6701F, BA6406F, BA6506F, BA6901F, BD6712AF
Technical Note
●Thermal derating curve
Power dissipation (total loss) indicates the power that can be consumed by IC at Ta = 25ºC (normal temperature). IC is
heated when it consumes power, and the temperature of IC chip becomes higher than ambient temperature. The
temperature that can be accepted by IC chip depends on circuit configuration, manufacturing process, etc, and consumable
power is limited. Power dissipation is determined by the temperature allowed in IC chip (maximum junction temperature) and
thermal resistance of package (heat dissipation capability). The maximum junction temperature is in general equal to the
maximum value in the storage temperature range.
Heat generated by consumed power of IC is radiated from the mold resin or lead frame of package. The parameter which
indicates this heat dissipation capability (hardness of heat release) is called heat resistance, represented by the symbol θja
[℃/W]. The temperature of IC inside the package can be estimated by this heat resistance. Fig.55 shows the model of heat
resistance of the package.
Heat resistance θja, ambient temperature Ta, junction temperature Tj, and power consumption P can be calculated by the
equation below:
θja = (Tj-Ta) / P
[℃/W]
Thermal derating curve indicates power that can be consumed by IC with reference to ambient temperature. Power that can
be consumed by IC begins to attenuate at certain ambient temperature. This gradient is determined by thermal resistance
θja.
Thermal resistance θja depends on chip size, power consumption, package ambient temperature, packaging condition, wind
velocity, etc., even when the same package is used. Thermal derating curve indicates a reference value measured at a
specified condition. Fig.56 shows a thermal derating curve (Value when mounting FR4 glass epoxy board 70 [mm] x 70 [mm]
x 1.6 [mm] (copper foil area below 3 [%]))
θja = (Tj-Ta) / P
[℃/W]
Ambient temperature Ta[℃]
Chip surface temperature Tj[℃]
Power consumption P[W]
Fig.55 Thermal resistance
Pd(mW)
Pd(mW)
800
800
780
700
625
600
560
700
624
600
BA6901F
500
500
400
400
300
300
200
200
100
100
0
25
50
*
75
95 100
125
150
Ta(℃)
0
BD6712AF
BA6406F
25
50
BD6701F
75 85 95 100
125
150
Ta(℃)
Reduce by 6.24 mW/°C over 25°C.<BD6701F, BA6406F, BD6712AF>
Reduce by 5.0 mW/°C over 25°C.<BA6901F>
(70.0mm×70.0mm×1.6mm glass epoxy board)
Fig.56 Thermal derating curve
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2012.03 - Rev.A
BD6701F, BA6406F, BA6506F, BA6901F, BD6712AF
Technical Note
●Cautions on use
1) Absolute maximum ratings
An excess in the absolute maximum rations, 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 line
Back electromotive force causes regenerated current to power supply line, therefore take a measure such as placing a
capacitor between power supply and GND for routing regenerated current. And fully ensure that the capacitor
characteristics have no problem before determine a capacitor value. (when applying electrolytic capacitors, capacitance
characteristic values are reduced at low temperatures)
4) GND potential
The potential of GND pin must be minimum potential in all operating conditions. Also ensure that all terminals except
GND terminal do not fall below GND voltage including transient characteristics. However, it is possible that the motor
output terminal may deflect below GND because of influence by back electromotive force of motor. Malfunction may
possibly occur depending on use condition, environment, and property of individual motor. Please make fully
confirmation that no problem is found on operation of IC.
5) Thermal design
Use a thermal design that allows for a sufficient margin in light of the power dissipation(Pd) in actual operating
conditions.
6) 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.
7) Actions in strong electromagnetic 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 rations or ASO.
9) Thermal shut down circuit(*1)
The IC incorporates a built-in thermal shutdown circuit (TSD circuit). Operation temperature is 175℃(typ.) and has a
hysteresis width of 25℃(typ.). When IC chip temperature rises and TSD circuit works, the output terminal becomes an
open state. 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. Do not continue to use the IC after operation this circuit or use the IC in an environment
where the operation of this circuit is assumed. (*1:BA6406F does not incorporate TSD circuit.)
10) Testing on application boards
When testing the IC on an application board, connecting a capacitor to a pin with low impedance subjects the IC to
stress. Always discharge capacitors after each process or step. Always turn the IC’s power supply off before connecting
it to or removing it from a jig or fixture during the inspection process. Ground the IC during assembly steps as an
antistatic measure. Use similar precaution when transporting or storing the IC.
11) GND 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 ground potential of application 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.
12) Capacitor between output and GND
When a large capacitor is connected between output and GND, if Vcc is shorted with 0V or GND for some cause, it is
possible that the current charged in the capacitor may flow into the output resulting in destruction. Keep the capacitor
between output and GND below 100uF.
13) IC terminal input
When Vcc voltage is not applied to IC, do not apply voltage to each input terminal. When voltage above Vcc or below
GND is applied to the input terminal, parasitic element is actuated due to the structure of IC. Operation of parasitic
element causes mutual interference between circuits, resulting in malfunction as well as destruction in the last. Do not
use in a manner where parasitic element is actuated.
14) In use
We are sure that the example of application circuit is preferable, but please check the character further more in
application to a part which requires high precision. In using the unit with external circuit constant changed, consider the
variation of externally equipped parts and our IC including not only static character but also transient character and
allow sufficient margin in determining.
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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
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R1120A