ROHM BD6380EFV Technical data

A

Stepping Motor Drivers

Low Voltage
Stepping Motor Drivers

BD6380EFV, BD6381EFV

No.12009EAT01

●Description
This series can drive the bipolar stepping motor used for paper feed carriages. It is a low power consumption bipolar P WM
constant current-drive driver. It is suitable for the mobile devices of a battery drive by po wer save function. It contributes
also to reduction of mounting area by ultra-thin and high heat-radiation (exposed metal type) HTSSOP package.

●Feature

1) Low ON resistance DMOS output

2) PWM constant current control (self oscillation)

3) Built-in spike noise cancel function (external noise filter is unnecessary)

4) Power save function

5) Built-in logic input pull-down resistor

6) Power-on reset function

7) Thermal shutdown circuit (TSD)

8) Over current protection circuit (OCP)

9) Under voltage lock out circuit (UVLO)

10) Malfunction prevention at the time of no applied power supply (Ghost Supply Prevention)

11) Electrostatic discharge: 4kV (HBM specification)

12) Adjacent pins short protection

13) Microminiature, ultra-thin and high heat-radiation (exposed metal type) HTSSOP package

●Application
Mini printer, Handy printer, Monitoring camera, WEB camera, Scanner, Toy, and Robot etc.

●Absolute maximum ratings(Ta=25℃)

Item Symbol BD6380EFV BD6381EFV Unit
Supply voltage VCC VCC -0.2～+7.0 -0.2～+7.0 V
Supply voltage VM VM -0.2～+15.0 -0.2～+15.0 V

Power dissipation Pd

1

※

1.1

1.1

2

※

4.0

4.0

1

※

2

※

W

W

Input voltage for control pin VIN -0.2～(VCC +0.3) -0.2～(VCC +0.3) V
RNF maximum voltage V
Maximum output current I
Operating temperature range T
Storage temperature range T
Junction temperature T

※1 70mm×70mm×1.6mm glass epoxy board. Derating in done at 8.8mW/℃ for operating above Ta=25℃.
※2 4-layer recommended board. Derating in done at 32.0mW/℃ for operating above Ta=25℃.
※3 Do not exceed Pd, ASO and Tjmax=150℃.

0.5 0.5 V

RNF

0.8

OUT

-25～+75 -25～+75 ℃

opr

-55～+150 -55～+150 ℃

stg

150 150 ℃

jmax

3

※

1.2

3

※

A/ch

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© 2012 ROHM Co., Ltd. All rights reserved.

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2012.02 - Rev.

BD6380EFV/BD6381EFV

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●Operating conditions (Ta=-25～+75℃)
Item Symbol BD6380EFV BD6381EFV Unit

Supply voltage VCC VCC 2.5～5.5 2.5～5.5 V
Supply voltage VM VM 4.0～13.5 6.0～13.5 V
Input voltage for control pin VIN 0～VCC 0～VCC V
Output current (DC) I

※4 Do not exceed Pd, ASO

0.5

OUT

4

※

0.8

4

※

A/ch

●Electrical characteristics

Applicable to BD6380EFV,BD6381EFV(Unless otherwise specified Ta=25℃, VCC=3.3V, VM=6.0V)

Item Symbol

Min. Typ. Max.

Limit

Unit Conditions

Whole

VCC current at standby I

- 0 10 μA PS=L

CCST

VCC current ICC - 1.6 3.0 mA PS=H, VLIMX=0.5V
VM current at standby I

- 0 10 μA PS=L

VMST

VM current IVM - 0.08 0.50 mA PS=H, VLIMX=0.5V

Control input (PS, IN1A, IN1B, IN2A, IN2B)

H level input voltage V
L level input voltage V
H level input current I
L level input current I

2.0 - 3.3 V

INH

0 - 0.8 V

INL

15 30 60 μAVIN =3V

INH

-10 0 - μAVIN =0V

INL

Output (OUT1A, OUT1B, OUT2A, OUT2B)

Output ON resistance
(BD6380EFV)
Output ON resistance
(BD6381EFV)
Output leak current I

RON - 1.2 1.5 Ω

RON - 1.0 1.25 Ω

- - 10 μA

LEAK

I

OUT

Sum of upper and lower
I

OUT

Sum of upper and lower

Current control

RNFX input current I
SENSEX input current I
VLIMX input current I
VLIMX input voltage range V
Comparator offset voltage V

-40 -20 - μA RNFX=0V

RNF

-2.0 -0.1 - μA SENSEX=0V

SENSE

-2.0 -0.1 - μAVLIMX=0V

VLIM

0 - 0.5 V

VLIM

-10 - 10 mV

OFS

Noise cancel time tn 0.3 0.7 1.2 μs R=39kΩ, C=1000pF
VREF voltage V

0.97 1.00 1.03 V I

VREF

VREF

Technical Note

=±0.3A, VM=6V

=±0.6A, VM=7.2V

=0~1mA

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2012.02 - Rev.

BD6380EFV/BD6381EFV

A

A

A

●Terminal function･Block diagram･Application circuit diagram

1) BD6380EFV / BD6381EFV

Pin
No.

Pin name Function

1 GND Ground terminal
2 PS Power save terminal

Pin

No.

Pin name Function

13 RNF2

Connection terminal of resistor for
output current detection

3 VLIM1 Output current limit setting terminal 14 OUT2B H bridge output terminal
4 SENSE1 Input terminal of current limit comp. 15 OUT2A H bridge output terminal

5 CR1

Connection terminal of CR for setting
PWM frequency

16 VM2 Power supply terminal for motor

17 NC Non connection
6 IN1A Logic input terminal 18 IN2B Logic input terminal
7 IN1B Logic input terminal 19 IN2A Logic input terminal

Technical Note

8 NC Non connection

20 CR2
9 VM1 Power supply terminal for motor

Connection terminal of CR for setting
PWM frequency

10 OUT1A H bridge output terminal 21 SENSE2 Input terminal of current limit comp.
11 OUT1B H bridge outpu t terminal 22 VLIM2 Output current limit setting terminal

12 RNF1

You can devide the
reference voltage by
external resistor, and use
it for output current limit
setting.

Connection terminal of resistor for
output current detection

Bypass capacitor.
Setting range is

4.7uF～47uF(electrolytic)

0.01uF～0.1uF(multilayer ceramic etc.)

23 VREF Reference voltage output terminal

4.7uF

0.1uF

Set the PWM
frequency.
Setting range is
C:470pF～4700pF
R:10kΩ～100kΩ

Set the PWM frequency .
Setting range is
C:470pF～4700pF
R:10kΩ～100kΩ

39kΩ

39kΩ

VREF

VLIM1

CR1

1000pF

PS 2

IN1
IN1B

IN2
IN2B

CR2

1000pF

VLIM2

23

19
18

20

22

3

CR

5

Timer

6
7

CR

Timer

VCC

Current Limit Comp.

Logic

Current Limit Comp.

GND

24

VREF

Predriver

UVLO

TSD
OCP

Predriver

1

VM1

9

OUT1A

10
11

OUT1B

12

RNF1

4

SENSE1

VM2

16

OUT2A

15
14

OUT2B

13

RNF2

21

SENSE2

0.3Ω

47uF

0.3Ω

Resistor for current. detecting.
Setting range is

0.1Ω～1.0Ω

0.1uF

Bypass capacitor.
Setting range is
10uF～470uF(electrolytic)

0.01uF～0.1uF
(multilayer ceramic etc.)

Resistor for current. detecting.
Setting range is

0.1Ω～1.0Ω

Fig.1 Block diagram & Application circuit diagram of BD6380EFV / BD6381EFV

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© 2012 ROHM Co., Ltd. All rights reserved.

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2012.02 - Rev.