BH6578FVM,BD7931F

Technical Note

2/8

www.rohm.com

2009.06 - Rev.A

© 2009 ROHM Co., Ltd. All rights reserved.

●

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

●

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

Ω

Io=500mA,Top+Bottom

Voltage gain (Loading)

GVLD

4.5

6.0

7.5

dB

*1

Voltage gain difference (Loading)

ΔGVLD

-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

Ω

Io=500mA,Top+Bottom

Voltage gain (Loading)

GVLD

4.0

6.0

8.0

dB

*2

Voltage gain difference (Loading)

ΔGVLD

-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|