BD7931F-TR_技术文档

Reversible Motor Drivers for Brush Motors

0.5A or Less Reversible

Motor Drivers (Single Moter)

No.11008EBT05

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 = 1.0Ω (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℃)

Ratings

Parameter

Symbol

Unit

BH6578FVM

7

BD7931F

15

Supply Voltage

Vcc

Pd

V

W

Power dissipation

Operating temperature

Storage temperature

Output current

0.55 *

0.69**

-40～85

Topr

Tstg

Iout

-35～+85

℃

mA

℃

-55～+150

500

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

Range

Parameter

Symbol

Vcc

Unit

V

BH6578FVM

4.5~5.5

BD7931F

Supply voltage

4.5～14

●Truth table

BH6578FVM,BD7931F

INPUT

OUTPUT

OUT+ OUT-

Function

INFWD

L

INREV

L

Hi Z

L

Hi Z

H

High Impedance

REV mode

L

H

L

H

L

FWD mode

H

L

Brake mode

Hiz：Hi-impedance

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2011.05 - Rev.B

1/8

Technical Note

BH6578FVM,BD7931F

●Electrical characteristics

BH6578FVM(Unless otherwise specified, Ta=25℃, Vcc=5V)

Limits.

Typ.

Parameter

Symbol

ICC1

Unit

mA

Conditions

No load

Min.

-

Max.

0.8

Standby current

0.4

(Loading Driver)

Output offset voltage

Input threshold voltage H

Input threshold voltage L

ON resistance

VOFSL

VIH

-15

2.0

GND

－

0

－

1.0

6.0

0

+15

Vcc

0.5

mV

V

Brake mode

VIL

V

RON

GVLD

ΔGVLD

IINL

1.8

ꢀ

Io=500mA,Top+Bottom

*1

Voltage gain (Loading)

Voltage gain difference (Loading)

Input bias current

4.5

-2.0

－

7.5

dB

µA

nA

2.0

86

－

120

300

FIN=5V,RIN=5V

CONT=2V

LDCONT bias current

ILDC

－

*

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)

Limits.

Parameter

Standby current

Symbol

Unit

Conditions

Min.

-

Typ.

0

Max.

5

ICC1

ICC2

ICC3

µA

mA

-

1.1

0.8

2.2

1.6

Supply current 1

FIN=5V,RIN=0V

Supply current 2

FIN=RIN=5V

(Loading Driver)

Output offset voltage

Input threshold voltage H

Input threshold voltage L

ON resistance

VOFSL

VIH

-35

2.0

GND

－

0

－

+35

Vcc

0.5

mV

V

Brake mode

VIL

－

V

RON

GVLD

ΔGVLD

IINL

1.0

6.0

0

1.8

ꢀ

Io=500mA,Top+Bottom

*2

Voltage gain (Loading)

Voltage gain difference (Loading)

Input bias current

4.0

-2.0

－

8.0

dB

µA

nA

2.0

165

－

250

300

FIN=5V,RIN=5V

CONT=5V

LDCONT bias current

ILDC

－

*

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|

www.rohm.com

2011.05 - Rev.B

2/8

Technical Note

BH6578FVM,BD7931F

●Reference data

0.4

0.3

0.2

0.1

0.0

0.4

5

4

3

2

1

0

85℃

25℃

-35℃

85℃

25℃

-35℃

0.3

0.2

0.1

0.0

-35℃

25℃

85℃

0

100 200

300 400 500

0

1

2

3

4

5

0

100

200

300

400

500

Load current[mA]

Input voltage : LDCONT[V]

Load current[mA]

Fig.1 Output loss voltage L(BH6578FVM)

Vcc=5V, CONT=OPEN

FWD mode

Fig.2 Output loss voltage L(BH6578FVM)

Vcc=5V, CONT=OPEN

REV mode

Fig.3 Voltage gain(BH6578FVM)

Vcc=5V, CONT=SWEEP

RL=8Ω+47µH

0.0

-0.1

-0.2

0

85℃

25℃

-35℃

-1

-0.1

-2

-3

-4

-5

-0.2

-35℃

25℃

85℃

-35℃

-0.3

25℃

85℃

-0.4

0

100 200 300 400 500

0

1

2

3

4

5

0

100 200 300 400 500

Load current[mA]

Input voltage : LDCONT[V]

Fig.4 Output loss voltage H(BH6578FVM)

Vcc=5V, CONT=OPEN

Fig.5 Output loss voltage H(BH6578FVM)

Vcc=5V, CONT=OPEN

REV mode

Fig.6 Voltage gain (BH6578FVM)

Vcc=5V, CONT=SWEEP

RL=8Ω+47µH

FWD mode

0.4

10

8

0.4

85℃

25℃

-35℃

85℃

25℃

-35℃

0.3

6

0.2

0.1

0.0

0.2

0.1

0.0

4

-40℃

25℃

85℃

2

0

100 200 300 400 500

Load current[mA]

0

1

2

3

4

5

0

100 200

300 400 500

Load current[mA]

Input voltage : LDCONT[V]

Fig.7 Output loss voltage L(BD7931F)

Vcc=8V, CONT=OPEN

FWD mode

Fig.8 Output loss voltage L(BD7931F)

Vcc=8V, CONT=OPEN

REV mode

Fig.9 Voltage gain (BD7931F)

Vcc=8V, CONT=SWEEP

RL=20Ω+47µH

0.0

-0.1

-0.2

0

0.0

-0.1

-0.2

85℃

25℃

-40℃

-2

-4

-6

40℃

25℃

85℃

-0.3

40℃

25℃

85℃

-8

-0.4

-10

0

100 200 300 400 500

Load current[mA]

0

1

2

3

4

5

0

100 200 300 400 500

Input voltage : LDCONT[V]

Load current[mA]

Fig.10 Output loss voltage H(BD7931F)

Vcc=8V, CONT=OPEN

FWD mode

Fig.11 Output loss voltage H(BD7931F)

Vcc=8V, CONT=OPEN

REV mode

Fig.12 Voltage gain(BD7931F)

Vcc=8V, CONT=SWEEP

RL=20Ω+47µH

www.rohm.com

2011.05 - Rev.B

3/8

Technical Note

BH6578FVM,BD7931F

●Thermal derating curves

BH6578FVM

BD7931F

0.8

0.6

0.4

0.2

0.4

0.2

0

85

0

25

7585 100 125

175

25

50

75

100 125

150

175

50

150

AMBIENT TEMPERATURE

:

Ta [℃]

AMBIENT TEMPERATURE

:

Ta [℃]

Pd : Power Dissipation

*when 70 mmx70 mmx1.6 mm thick glass epoxy substrate with less than 3% copper foil occupancy ratio is mounted.

●Block diagram, applied circuit diagram example

BH6578FVM, BD7931F (in common)

PREGND

REV IN

LDCONT

FWD IN

8

F

7

6

5

R

PRE

GND

Control

Logic

LDCONT

+

-

T.S.D

POW CMOS

H-Bridge

POW

GND

2

3

1

4

M

0.1µF

Bypass

Vcc

capacitor

POWG

T.S.D: Thermal shutdown

Fig.13

●Pin descriptions

Pin No.

Pin Name

Function

Supply voltage

Pin No.

PinName

Function

1

2

3

4

Vcc

OUT+

OUT-

GND

5

6

7

8

GND_S

LDCONT

INREV

Signal ground

FWD output

REV output

Power ground

Loading driver voltage setting pin

REV input

INFWD

FWD input

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2011.05 - Rev.B

4/8

Technical Note

BH6578FVM,BD7931F

●Interfaces

BH6578FVM

BD7931F

LDCONT

VCC

10Kꢀ

6

39Kꢀ

49.6Kꢀ

Fig.14

Fig.17

OUT+/OUT-

FIN/RIN

OUT+/OUT-

INFWD/INREV

VCC

200Kꢀ

7

8

7

8

2

3

2

3

50Kꢀ

Fig.15

Fig.16

Fig.18

Fig.19

●Operations

(1) CONTROL LOGIC

Operation of each mode is carried out as follows:

When INFWD is “H” and INREV is “L,” the normal rotation mode is achieved and current flows from OUT⁺to OUT^-.

When both INFWD and INREV are “H,” the brake mode is achieved. Operation in such event is described as follows:

the top-side transistor turns OFF to stop supplying motor drive current, the bottom-side transistor turns ON to absorb

reverse EMF of motor and applies brake to motor. When both INFWD and INREV are “L,” OUT⁺and OUT^-potentials

become open and the motor stops.

(2) LOADING CONT

Controlling the output voltage can vary voltage applied to the motor and can control the motor speed. By the voltage

entered to the CONT terminal, the output H voltage can be controlled (gain 6dB Typ.). Even if the voltage entered is

increased more than necessary (Vcc Max), the output voltage never exceeds the power supply voltage.

www.rohm.com

2011.05 - Rev.B

5/8

Technical Note

BH6578FVM,BD7931F

●Notes for use

(1) Absolute maximum ratings

In the event that applied voltage (VCC, VM), working temperature range (Topr), and other absolute maximum rating are

exceeded, the IC may be destroyed. Because it is unable to identify the short-circuit mode, open mode, etc., if any

special mode is assumed, which exceeds the absolute maximum rating, physical safety measures are requested to be

taken, such as fuses, etc.

(2) Reverse connection of power supply connector

Reverse connection of power supply connector may destroy the IC. Take necessary measures to protect the IC from

reverse connection breakage such as externally inserting diodes across power supply and IC power supply terminal as

well as across power supply and motor coil.

(3) Power supply line

Because return of current regenerated by reverse EMF of a motor occurs, take necessary measures such as inserting

capacitors across the power supply and GND as a path for regenerated current, and determine the capacity value after

thoroughly confirming that there would be no problems in various characteristics such as capacitance drop at low

temperature which may occur with electrolytic capacitors.

(4) Ground potential

Keep the GND terminal potential to the minimum potential under any operating condition. In addition, check if there is

actually any terminal which provides voltage below GND including transient phenomena.

(5) Thermal design

Consider permissible dissipation (Pd) under actual working condition and carry out thermal design with sufficient margin

provided.

(6) Terminal-to-terminal short-circuit and erroneous mounting

When the present IC is mounted to a printed circuit board, take utmost care to direction of IC and displacement. In the

event that the IC is mounted erroneously, IC may be destroyed. In the event of short-circuit caused by foreign matter

that enters in a clearance between outputs or output and power-GND, the IC may be destroyed.

(7) Operation in strong electromagnetic field

The use of the present IC in the strong electromagnetic field may result in maloperation, to which care must be taken.

(8) ASO

When IC is used, design in such a manner that the output transistor to a motor does not exceed absolute maximum

ratings and ASO.

(9) Thermal shutdown circuit (TSD) (common)

When junction temperature (Tj) becomes thermal shutdown ON temperature 175°C, the thermal shutdown circuit (TSD

circuit) is activated and driver output current is shorted. There is 25°C temperature hysteresis. The thermal shutdown

protection circuit is first and foremost intended for interrupt IC from thermal runaway, and is not intended to protect and

warrant the IC. Consequently, never attempt to continuously use the IC after this circuit is activated or to use the circuit

with the activation of the circuit premised.

(10) Capacitor across output and GND

In the event a large capacitor is connected across output and GND, when Vcc and VIN are short-circuited with 0V or

GND for some kind of reasons, current charged in the capacitor flows into the output and may destroy the IC. Use a

capacitor smaller than 0.1 µF between output and GND.

(11) Inspection by set substrate

In the event a capacitor is connected to a pin with low impedance at the time of inspection with a set substrate, there is a

fear of applying stress to the IC. Therefore, be sure to discharge electricity for every process. Furthermore, when the

set substrate is connected to a jig in the inspection process, be sure to turn OFF power supply to connect the jig and be

sure to turn OFF power supply to remove the jig. As electrostatic measures, provide grounding in the assembly

process, and take utmost care in transportation and storage.

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2011.05 - Rev.B

6/8

Technical Note

BH6578FVM,BD7931F

(12) IC terminal input

The present IC is a monolithic IC and has P⁺isolation and a P substrate between elements to separate elements.

With this P layer and N layer of each element, PN junction is formed, and various parasitic elements are formed.

For example, when resistors and transistors are connected to terminals as is the case of Fig.20, where in the case of

resistor, the potential difference satisfies the relation of ground (GND)>(terminal A), and in the case of transistor (NPN),

the potential difference satisfies the relation of ground (GND)>(terminal B), PN junction works as a diode.

Furthermore, in the case of transistor (NPN), a parasitic NPN transistor operates by the N-layer of other elements

adjacent to the parasitic diode. The parasitic element is inevitably formed because of the IC construction.

The operation of the parasitic element gives rise to mutual interference between circuits and results in malfunction, and

eventually, breakdown. Consequently, take utmost care not to use the IC to operate the parasitic element such as

applying voltage lower than GND (P substrate) to the input terminal.

In addition, when the power supply voltage is not applied to IC, do not apply voltage to the input terminal, either.

Similarly, when the power supply voltage is applied, each input terminals shall be the voltage below the power supply

voltage or within the guaranteed values of electrical properties.

Resistor

Transistor(NPN)

Terminal B

B

Terminal A

C

E

Terminal A

B

C

E

N

P⁺

Parasitic

element

P⁺

P

N

P-sub

Parasitic element

GND

Parasitic element

Fig.20 Example of the basic structure of a bipolar IC

(13) GND wiring pattern

If there are a small signal GND and a high current GND, it is recommended to separate the patterns for the high current

GND and the small signal GND and provide a proper grounding to the reference point of the set not to affect the voltage

at the small signal GND with the change in voltage due to resistance component of pattern wiring and high current. Also for

GND wiring pattern of the component externally connected, pay special attention not to cause undesirable change to it.

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2011.05 - Rev.B

7/8

Technical Note

BH6578FVM,BD7931F

●Operating part numer

B

H

6

5

7

8

F

V M

-

T

R

Part No

BH

BD

Part No

6578

7931

Package

FVM : MSOP8

F : SOP8

Packaging and forming specification

E2: Embossed tape and reel

(SOP8)

TR: Embossed tape and reel

(MSOP8)

MSOP8

2.9 0.1

(MAX 3.25 include BURR)

Tape

Embossed carrier tape

3000pcs

+

6°

4°

Quantity

−4°

8

7

6

5

TR

Direction

of feed

The direction is the 1pin of product is at the upper right when you hold

reel on the left hand and you pull out the tape on the right hand

(

)

1

2

3

4

1PIN MARK

+0.05

1pin

+0.05

−0.03

0.145

0.475

S

0.22

−0.04

0.08

S

Direction of feed

Order quantity needs to be multiple of the minimum quantity.

0.65

Reel

(Unit : mm)

∗

SOP8

5.0 0.2

(MAX 5.35 include BURR)

Tape

Embossed carrier tape

+

6

°

4°

−4

°

Quantity

2500pcs

8

7

6

5

E2

Direction

of feed

The direction is the 1pin of product is at the upper left when you hold

reel on the left hand and you pull out the tape on the right hand

(

)

1

2

3

4

0.595

+0.1

0.17

-

0.05

S

0.1

S

1.27

Direction of feed

1pin

0.42 0.1

Reel

Order quantity needs to be multiple of the minimum quantity.

(Unit : mm)

∗

8/8

Notice

N o t e s

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, commu-

nication 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, fuel-

controller 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

such special purpose, please contact a ROHM sales representative before purchasing.

If you intend to export or ship overseas any Product or technology speciﬁed herein that may

be controlled under the Foreign Exchange and the Foreign Trade Law, you will be required to

obtain a license or permit under the Law.

Thank you for your accessing to ROHM product informations.

More detail product informations and catalogs are available, please contact us.

ROHM Customer Support System

http://www.rohm.com/contact/

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R1120

A


型号：	BD7931F-TR
厂家：	ROHM
描述：	0.5A or Less Reversible Motor Drivers (Single Moter) 0.5A或更少可逆电机驱动器（单启动子）驱动器电机
文件：	总9页 (文件大小：246K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

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