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BD7931F-E2

P1-P3P4-P6P7-P9
1/8
www.rohm.com
2011.05 - Rev.B
© 2011 ROHM Co., Ltd. All rights reserved.
Reversible Motor Drivers for Brush Motors
0.5A or Less Reversible
Motor Drivers (Single Moter)
BH6578FVM,BD7931F
●Description
The BH6578FVM and BD7931F are reversible motor drivers with a wide output dynamic range, with power MOS used for the
output transistor. The motor drivers can set the output mode to four modes of normal rotation, reverse rotation, stop (idling),
and braking in accordance with input logic (2 inputs).
●Features
1) Wide dynamic range loading driver with MOS output, Ron = 1.0 (Top+Bottom)
2) With loading driver voltage setting terminal
3) Built-in thermal shutdown circuit (TSD)
4) MSOP8 package (BH6578FVM)
5) SOP8 package (BD7931F)
●Applications
Tray loading of CD/DVD, applications using DC motors
●Absolute maximum ratings (Ta=25℃)
Parameter Symbol
Ratings
Unit
BH6578FVM BD7931F
Supply Voltage Vcc 7 15 V
Power dissipation Pd 0.55 * 0.69** W
Operating temperature Topr -35～+85 -40～85 ℃
Storage temperature Tstg -55～+150 ℃
Output current Iout 500 mA
Junction temperature Tjmax 150 ℃
* When 70 mmx70 mmx1.6 mm thick glass epoxy substrate with less than 3% copper foil occupancy ratio is mounted.
When used at Ta=25°C or higher, derated at 4.4 mW/°C.
** When 70 mmx70 mmx1.6 mm thick glass epoxy substrate with less than 3% copper foil occupancy ratio is mounted.
When used at Ta=25°C or higher, derated at 5.5 mW/°C.
●Recommended operating range
Parameter Symbol
Range
Unit
BH6578FVM BD7931F
Supply voltage Vcc 4.5~5.5 4.5～ 14 V
●Truth table
BH6578FVM,BD7931F
INPUT OUTPUT
Function
INFWD INREV OUT+ OUT-
L L Hi Z Hi Z High Impedance
L H L H REV mode
H L H L FWD mode
H H L L Brake mode
Hiz：Hi-impedance
No.11008EBT05
BH6578FVM,BD7931F
Technical Note
2/8
www.rohm.com
2011.05 - Rev.B
© 2011 ROHM Co., Ltd. All rights reserved.
●Electrical characteristics
BH6578FVM(Unless otherwise specified, Ta=25℃, Vcc=5V)
Parameter Symbol
Limits.
Unit Conditions
Min. Typ. Max.
Standby current ICC1 - 0.4 0.8 mA No load
(Loading Driver)
Output offset voltage VOFSL -15 0 +15 mV Brake mode
Input threshold voltage H VIH 2.0 － Vcc V
Input threshold voltage L VIL GND － 0.5 V
ON resistance RON － 1.0 1.8 Io=500mA,Top+Bottom
Voltage gain (Loading) GVLD 4.5 6.0 7.5 dB *1
Voltage gain difference (Loading) GVLD -2.0 0 2.0 dB
Input bias current IINL － 86 120 µA FIN=5V,RIN=5V
LDCONT bias current ILDC － － 300 nA CONT=2V
* No radiation-resistant design is adopted for the present product.
*1. Let V01 denote output-to-output voltage when CONT=1V and V02 denote output-to-output voltage
when CONT=3.5V, voltage gain can be expressed by the following equation:GVLD=20log|(V02-V01)/2.5|
BD7931F(Unless otherwise specified, Ta=25℃, Vcc=8V)
Parameter Symbol
Limits.
Unit Conditions
Min. Typ. Max.
Standby current
ICC1 - 0 5 µA
Supply current 1
ICC2 - 1.1 2.2 mA
FIN=5V,RIN=0V
Supply current 2
ICC3 - 0.8 1.6 mA
FIN=RIN=5V
(Loading Driver)
Output offset voltage VOFSL -35 0 +35 mV Brake mode
Input threshold voltage H VIH 2.0 － Vcc V
Input threshold voltage L VIL GND － 0.5 V
ON resistance RON － 1.0 1.8 Io=500mA,Top+Bottom
Voltage gain (Loading) GVLD 4.0 6.0 8.0 dB *2
Voltage gain difference (Loading) GVLD -2.0 0 2.0 dB
Input bias current IINL － 165 250 µA FIN=5V,RIN=5V
LDCONT bias current ILDC － － 300 nA CONT=5V
* No radiation-resistant design is adopted for the present product.
*1. Let V01 denote output-to-output voltage when CONT=1V and V02 denote output-to-output voltage when CONT=3.5V, voltage gain can be expressed by
the following equation:GVLD=20log|(V02-V01)/2.5|
BH6578FVM,BD7931F
Technical Note
3/8
www.rohm.com
2011.05 - Rev.B
© 2011 ROHM Co., Ltd. All rights reserved.
0.0
0.1
0.2
0.3
0.4
0 100 200 300 400 500
Load current[mA]
Loss voltage[V
]
85℃
25℃
-35℃
0.0
0.1
0.2
0.3
0.4
0 100 200 300 400 500
Load current[mA]
Loss voltage[V
]
85℃
25℃
-35℃
0
1
2
3
4
5
012345
Input voltage : LDCONT[V]
Output voltage[
V
-35℃
25℃
85℃
0.0
0.1
0.2
0.3
0.4
0 100 200 300 400 500
Load current[mA]
Loss voltage[V
]
0.0
0.1
0.2
0.3
0.4
0 100 200 300 400 500
Load current[mA]
Loss voltage[V
]
0
2
4
6
8
10
012345
Input voltage : LDCONT[V]
Output voltage[
V
-0.4
-0.3
-0.2
-0.1
0.0
0 100 200 300 400 500
Load current[mA]
Loss voltage[V
]
-0.4
-0.3
-0.2
-0.1
0.0
0 100 200 300 400 500
Load current[mA]
Loss voltage[V
]
-35℃
25℃
85℃
-0.4
-0.3
-0.2
-0.1
0.0
0 100 200 300 400 500
Load current[mA]
Loss voltage[V
]
-0.4
-0.3
-0.2
-0.1
0.0
0 100 200 300 400 500
Load current[mA]
Loss voltage[V
]
-10
-8
-6
-4
-2
0
012345
Input voltage : LDCONT[V]
Output voltage[
V
-5
-4
-3
-2
-1
0
012345
Input voltage : LDCONT[V]
Output voltage[
V
40℃
25℃
85℃
-40℃
25℃
85℃
85℃
25℃
-40℃
●Reference data
Fig.1 Output loss voltage L(BH6578FVM) Fig.2 Output loss voltage L(BH6578FVM) Fig.3 Voltage gain(BH6578FVM)
Vcc=5V, CONT=OPEN Vcc=5V, CONT=OPEN Vcc=5V, CONT=SWEEP
FWD mode REV mode RL=8Ω+47µH
Fig.4 Output loss voltage H(BH6578FVM) Fig.5 Output loss voltage H(BH6578FVM) Fig.6 Voltage gain (BH6578FVM)
Vcc=5V, CONT=OPEN Vcc=5V, CONT=OPEN Vcc=5V, CONT=SWEEP
FWD mode REV mode RL=8Ω+47µH
Fig.7 Output loss voltage L(BD7931F) Fig.8 Output loss voltage L(BD7931F) Fig.9 Voltage gain (BD7931F)
Vcc=8V, CONT=OPEN Vcc=8V, CONT=OPEN Vcc=8V, CONT=SWEEP
FWD mode REV mode RL=20Ω+47µH
Fig.10 Output loss voltage H(BD7931F) Fig.11 Output loss voltage H(BD7931F) Fig.12 Voltage gain(BD7931F)
Vcc=8V, CONT=OPEN Vcc=8V, CONT=OPEN Vcc=8V, CONT=SWEEP
FWD mode REV mode RL=20Ω+47µH
-35℃
25℃
85℃
85℃
25℃
-35℃
85℃
25℃
-35℃
85℃
25℃
-35℃
40℃
25℃
85℃
P1-P3P4-P6P7-P9

BD7931F-E2

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Description:
Motor / Motion / Ignition Controllers & Drivers REVERSIBLE 0.5A
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