ROHM BD6941FM Technical data
Power Management IC Series for Automotive Body Control
Motor Driver
BD6941FM
●Description
BD6941FM is the reversible motor driver for output 1.25A (1Motor), and can control a DC motor in four modes (Forward,
Reverse, Standby, Brake) corresponding to two control logic inputs.
●Features
1) １ch DMOS H bridge output
2) Four output states ( Forward,Reverse,Standby,Brake ) by two control logic
3) Built-in surge-absorbing diodes
4) Low standby current
5) Output overcurrent protection with timer.
6) Over voltage detection switch off
7) TSD detects junction temperature and circuitry switches off the outputs at high temperature.
8) Built-in protection monitor pin (PO)
●Applications
Onboard devices(Vehicle equipment etc)
●Absolute Maximum Ratings（Ta= 25 ℃）
PARAMETER SYMBOL LIMIT UNIT
SUPPLY VOLTAGE Vcc 50 V
INPUT VOLTAGE V
OUTPUT CURRENT IO 1.25 (＊1) A
POWER DISSIPATION Pd 2.8 (＊2) W
OPERATING TEMPERATURE Topr -40～105 ℃
INP
, V
-0.3～20 V
INN
No.09039EAT02
STORAGE TEMPERATURE Tstg -55～150 ℃
JUNCTION TEMPERATURE Tjmax 150 ℃
*1 Not to exceed Pd and ASO.
*2 Mounted on a glass epoxy PCB (70mm×70mm×1.6mm).
To use at temperature above Ta=25℃ reduce 22.4mW/℃.
●Operating Range
PARAMETER SYMBOL LIMIT UNIT
SUPPLY VOLTAGE Vcc 8.0～16.0 V
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© 2009 ROHM Co., Ltd. All rights reserved.
1/8
2009.06 - Rev.A
BD6941FM
●Electrical Characteristics（Unless otherwise specified, Vcc=8V～16V, Ta=-40℃～105℃）
PARAMETER SYMBOL
MIN. TYP. MAX
LIMIT
UNIT CONDITIONS
Circuit current 1 Icc1 - 0 10 μA Standby mode
Circuit current 2 Icc2 - 3 8 mA Forward or reverse mode
Circuit current 3 Icc3 - 3 8 mA Brake mode
Input Voltage “H” level VIH 3.0 - - V
Input Voltage “L” level VIL - - 1.0 V
“H” level input current IIH - 50 100 μA VIN=5.0V, flowing in current
“L” level input current IIL - 0 10 μA VIN=0V, flowing out current
Output on voltage 1 V
Output on voltage 2 V
Output leakage current “H” ILH - 0 10 μA V
Output leakage current “L” ILL - 0 10 μA V
Upper free-wheeling
diode forward voltage
Lower free-wheeling
diode forward voltage
Protection monitor voltage V
Protection monitor
leakage current
Over current protection switch
on current
Over Voltage Lockout
lockout switch on voltage
- 0.84 1.5 V Vcc=12V, I
ON1
- - 1.7 V
ON2
V
0.3 1.0 1.5 V IF=0.6A
FH
V
0.3 1.0 1.5 V IF=0.6A
FL
- - 0.6 V IPO=3mA
LPO
I
- 0 10 μA VPO=Vcc
LPO
I
1.5 - 3.5 A
OCP
V
25 30 35 V
OVP
out
Vcc=8～16V, I
total drop
=0V
OUT
=Vcc
OUT
=0.5A, total drop
out
Technical Note
=0.5A,
●Heat Reduction Curve
Pd(W)
3.0
2.8
2.0
1.0
50 75 100 125 150 Ta(℃)0
105
Mounted on a glass epoxy PCB (70mm×70mm×1.6mm)
To use at temperature above Ta=25℃ reduce 22.4mW/℃.
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© 2009 ROHM Co., Ltd. All rights reserved.
2/8
2009.06 - Rev.A
BD6941FM
Technical Note
●Reference Data
8
20
200
6
Ta= 1 05
A]
ｍ
4
Icc[
Ta=
2
Ta= 2 5℃
－40℃
℃
[V]
OUT
V
15
Ta= 1 05
℃
10
Ta= 2 5℃
Ta= －40℃
5
150
A]
μ
100
[
ＩＮ
Ｉ
Ta= －40℃
50
Ta= 2 5
Ta= 1 05
℃
0
810121416
Vcc[V]
0
01234
VIN[V]
0
0 4 8 12 16
ＶＩＮ［Ｖ］
Fig.1 Circuit current Fig.2 Input voltage vs. Output voltage Fig.3 Input H current
（Forward・Reverse・Brake）
3
2.5
2
]
Ｖ
[
1.5
Ta= －40℃
ON
Ｖ
1
0.5
0
0 0.4 0.8 1.2 1.6
Ta= 2 5℃
Ta= 1 05 ℃
[Ａ]
Ｉ
ＯＵＴ
1.2
0.9
]
Ｖ
[
0.6
FH
Ｖ
0.3
0.0
Ta= －40℃
0.0 0.4 0.8 1.2 1.6
Ta= 2 5℃
[Ａ]
Ｉ
ＯＵＴ
Ta= 1 05 ℃
1.2
0.9
Ta= 2 5℃
Ｉ
ＯＵＴ
Ta= 1 05 ℃
[Ａ]
]
Ｖ
[
0.6
FL
Ｖ
Ta= －40℃
0.3
0.0
0.0 0.4 0.8 1.2 1.6
Fig.4 Output on voltage（Vcc=12V） Fig.5 Upper free-wheeling Fig.6 Upper free-wheeling
diode forward voltage H diode forward voltage L
0.16
4
0.12
[V]
0.08
PO
Ta= －40℃
V
0.04
Ta= 1 05 ℃
Ta= 2 5℃
3
2
Iocp[A]
1
[V]
OV
V
35
33
31
29
27
℃
0
01234
IPO[ｍA]
0
-40 -10 20 50 80
Ta[℃]
25
-40 0 40 80
Ta[℃]
Fig.7 Protection monitor voltage Fig.8 Over current protection Fig.9 Over Voltage Lockout
switch on current lockout switch on voltage
20
400
20
15
10
[μs]
ON
T
5
0
-40 0 40 80
Fig.10 Over current protection Fig.11 Over current protection Fig.12 TSD temperature
Ta[℃]
300
[μs]
200
OFF
T
100
0
-40 0 40 80
Ta[℃]
15
[V]
10
OUT
V
5
0
0 50 100 150 200
Ta[℃]
monitor on time monitor off time
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© 2009 ROHM Co., Ltd. All rights reserved.
3/8
2009.06 - Rev.A
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