ROHM BA6859AFP-Y Technical data

A

System Motor Driver ICs for CD/DVD Players

1ch Spindle
Motor Driver ICs

BA6859AFP-Y,BA6664FM,BD6671FM

●Description

ROHM’s spindle motor drivers incorporate the 3-phase full-wave pseudo-linear drive system(BA6859AFP-Y, BA6664FM)
and 180 ° electrifying direct PWM drive system(BD6671FM).Smooth rotation characteristic performance is ensured.
Besides, high torque is provided in a wide output range because the output stage incorporates low-saturation voltage NPN
transistors (BA6859AFP-Y, BA6664FM) and low-power consumption MOSFET (BA6671FM).

●Features

1) 3-phase full-wave pseudo-linear system (BA6859AFP-Y, BA6664FM)

2) 180° electrifying direct drive PWM system (BD6671FM)

3) Power saving, TSD (thermal shutdown) functions built in

4) Current limiting, Hall bias circuit built in

5) FG output built in

6) 3-phase component FG output built in (BA6664FM, BD6671FM)

7) Circuit direction detection function built in (BA6859AFP-Y, BA6664FM)

8) Reverse rotation prevention circuit built in

9) Short brake pin built in (BA6859AFP-Y, BA6664FM)

10) Brake mode selection pin built in (BA6859AFP-Y, BD6671FM)

11) Supports DSP 3.3 V

●Applications

Used for car, CD and DVD players incorporating changer function

●Absolute maximum ratings (Ta=25℃)

Parameter Symbol

Applied voltage VCC 7 7 7 V

Applied voltage VM 15 15 15 V

Applied voltage VG - - 20 V

Power dissipation Pd 1450*1 2200*2 2200*2 mW
Operating temperature Topr -40～+85 -40～+85 -40～+85 ℃
Storage temperature Tstg -55～+150 -55～+150 -55～+150 ℃

Output current Iout 1300 1300 2500 mA
Junction temperature Tjmax 150 150 150 ℃

*1 Reduced by 11.6 mW/℃ over 25℃, when mounted on a glass epoxy board (70 mm x 70 mm x 1.6 mm).
*2 Reduced by 17.6 mW/℃ over 25℃, when mounted on a glass epoxy board (70 mm x 70 mm x 1.6 mm).

●Line up matrix

Parameter Symbol

Power supply voltage

VG pin voltage VG - - 8.5～19 V

VCC 4.5～5.5 4.5～5.5 4.5～5.5 V

VM 3.0～14 3.0～14 4.0～13.2 V

BA6859AFP-Y BA6664FM BD6671FM

BA6859AFP-Y BA6664FM BD6671FM

Ratings

Ratings

No.10011EAT03

Unit

Unit

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1/17

2010.06 - Rev.

BA6859AFP-Y,BA6664FM,BD6671FM

A

●Electrical characteristics

1) BA6859AFP-Y (Unless otherwise specified, Ta=25℃, VCC=5.0V, VM=12V)

Parameter Symbol

Min. Typ. Max.

Limits

Unit Conditions

<Total device>

Circuit current 1 I
Circuit current 2 I

－ 0 0.2 mA PS=L

CC1

－ 5.0 7.5 mA PS=H

CC2

<Power-saving >

ON voltage range V
OFF voltage range V

－ － 1.0 V Internal circuit OFF

PSON

2.5 － － V Internal circuit ON

PSOFF

<Hall bias>

Hall bias voltage VHB 0.5 0.9 1.5 V IHB=10mA

<Hall amp>

Input bias current IHA － 0.7 3.0 µA
Same phase input voltage range V
Mini. input level V
H3 hysteresis level V

1.0 － 4.0 V

HAR

50 － － mVpp One side input level

INH

5 20 40 mV

HYS

<Torque Command >

Input voltage range EC, E
Offset voltage - E
Offset voltage + E
Input bias current E

COFF-

COFF+

CIN

CR

-3 － 3 µA EC=ECR

0 － 5 V Linear range:0.5～3.3V

-80 -50 -20 mV ECR=1.9V
20 50 80 mV ECR=1.9V

I/O gain GEC 0.56 0.70 0.84 A/V EC=1.2, 1.7V

<FG>

FG output high-level voltage V
FG output low-level voltage V

4.5 4.8 － V IFG=-20µA

FGH

－ 0.25 0.4 V IFG=3.0mA

FGL

Duty (reference values) DU － 50 － %

<Rotation Detection>

FR output high-level voltage V
FR output low-level voltage V

4.1 4.4 － V IFR=-20µA

FRH

－ 0.25 0.4 V IFR=3.0mA

FRL

<Output>

Output saturation high level voltage VOH － 1.0 1.4 V IO=-600mA
Output saturation low level voltage VOL － 0.4 0.7 V IO=600mA
Pre-drive current I

－ 35 70 mA EC=0V output open

VML

Output limit current ITL 560 700 840 mA

<Short brake >

ON voltage range V
OFF voltage range V

2.5 － － V BR=0V

SBON

－ － 1.0 V BR=0V

SBOFF

<Brake mode >

ON voltage range V
OFF voltage range V

2.5 － － V EC>ECR, SB=Open

BRON

－ － 1.0 V EC>ECR, SB=Open

BROFF

●Reference: Data

10

8

25℃

-40℃

85℃

6

4

2

Circui t curr ent :Icc2 [mA]

0

4.5 5 5.5 6 6.5 7

Supply voltag e :Vcc[v]

1.5

[V]

OH

1.0

0.5

Output H voltage:V

0.0

0 0.3 0.6 0.9 1.2 1.5

Output C urrent :IOH [v]

85℃

-40℃

25℃

Fig.1 Circuit Current 2

Fig.2 Output Saturation Voltage

at High Level

Fig.3 Output Saturation Voltage

Technical Note

1.5

[V]

OL

1.0

0.5

Output L voltage :V

0.0

0 0.3 0.6 0.9 1.2 1.5

Output C urrent :I

at Low Level

85℃

-40℃

OL

25℃

[A]

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2/17

2010.06 - Rev.

BA6859AFP-Y,BA6664FM,BD6671FM

A

2) BA6664FM(Unless otherwise specified, Ta=25℃, VCC=5.0V, VM=12V)

Parameter Symbol

Min. Typ. Max.

Limits

Unit Conditions

<Total device>

Circuit current 1 I

Circuit current 2 I

－ 0 0.2 mA PS=L, GSW=Open

CC1

－ 6.2 9.1 mA PS=H, GSW=Open

CC2

<Power-saving >

ON voltage range V

OFF voltage range V

－ － 1.0 V Internal current circuit OFF

PSON

2.5 － － V Internal current circuit ON

PSOFF

<Hall bias>

Hall bias voltage VHB 0.5 0.9 1.5 V IHB=10mA

<Hall amp>

Input bias current IHA － 0.7 3.0 µA

Same phase input voltage range V

Mini. input level V

H3 hysteresis level V

1.0 － 4.0 V

HAR

50 － － mVpp One side input level

INH

5 20 40 mV

HYS

<Torque Command >

Input voltage range EC, E

Offset voltage - E

Offset voltage + E

Input bias current E

I/O gain low-level G

I/O gain medium-level G

I/O gain high-level G

COFF-

COFF+

CIN

ECL

ECM

ECH

CR

-3 － 3 µA EC=ECR

0.52 0.65 0.78 A/V GSW=L,RNF=0.5Ω

2.24 2.8 3.36 A/V GSW=H,RNF=0.5Ω

0 － 5 V Linear range:0.5～3.3V

-75 -45 -15 mV ECR=1.65V, GSW=L

15 45 75 mV ECR=1.65V, GSW=L

1.04 1.3 1.56 A/V GSW=OPEN,RNF=0.5Ω

<FG>

FG output high-level voltage V

FG output low-level voltage V

4.5 4.8 － V IFG=-20µA

FGH

－ 0.2 0.4 V IFG=3.0mA

FGL

<FG2>

FG output high-level voltage V

FG output low-level voltage V

4.6 4.9 － V

FG2H

－ 0.2 0.4 V I

FG2L

<Rotation Detection>

FR output high-level voltage V

FR output low-level voltage V

4.1 4.4 － V IFR=-20µA

FRH

－ 0.2 0.4 V IFR=3.0mA

FRL

<Output>

Output saturation high-level voltage VOH － 1.0 1.35 V I

Output saturation low-level voltage VOL － 0.4 0.65 V I

Pre-drive current I

－ 35 70 mA EC=0V output open

VML

Output limit current ITL 560 700 840 mA

<Short brake >

ON voltage range V

OFF voltage range V

2.5 － － V BR=0V

SBON

－ － 1.0 V BR=0V

SBOFF

<Brake mode >

ON voltage range V

OFF voltage range V

2.5 － － V EC>ECR, SB=Open

BRON

－ － 1.0 V EC>ECR, SB=Open

BROFF

<Gain switching >

Low voltage range V

High voltage range V

OPEN voltage V

－ － 1.0 V

GSWL

3.0 － － V

GSWH

GSWOP

－ 2.0 － V

=-20µA

IFG2

=3mA

FG2

=-600mA

OUT

=600mA

OUT

Technical Note

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3/17

2010.06 - Rev.

BA6859AFP-Y,BA6664FM,BD6671FM

A

3) BD6671FM (Unless otherwise specified, Ta=25℃, VCC=5.0V, VM=12V)

Parameter Symbol

Min. Typ. Max.

Limits

Unit Conditions

<Total device>

Circuit current 1 I

Circuit current 2 I

－ 100 200 µA PS=L, GSW=Open

CC1

8 14 20 mA PS=H, GSW=Open

CC2

<Power-saving >

ON voltage range V

OFF voltage range V

－ － 1.0 V Internal current circuit OFF

PSON

2.5 － － V Internal current circuit ON

PSOFF

<Hall bias>

Hall bias voltage VHB 0.7 1.0 1.3 V IHB=10mA

<Hall amp>

Same phase input voltage range V

Mini. input level V

Hall hysteresis level + V

Hall hysteresis level - V

1.4 － 3.6 V

HAR

100 － － mVpp Both side input level

INH

5 20 40 mV

HYS+

-40 -20 -5 mV

HYS-

<Gain switching >

Low voltage range V

High voltage range V

OPEN voltage range V

－ － 0.6 V

GSWL

2.0 － － V

GSWH

GSWOP

－ 1.3 － V

<Torque Command >

Input voltage range EC, E

Offset voltage + E

Offset voltage - E

Input current E

I/O gain low-level G

I/O gain medium-level G

I/O gain high-level G

COFF+

COFF-

CIN

ECL

ECM

ECH

CR

-11 -2.5 0 µA EC=ECR=1.65V

0.28 0.35 0.42 A/V GSW=L

1.12 1.40 1.68 A/V GSW=H

0 － 5 V Linear range: 0.5～3.0V

5 50 100 mV GSW=M

-100 -50 5 mV GSW=M

0.56 0.70 0.84 A/V GSW=M

<Output>

Output ON resistance RON － 1.0 1.35 Ω

Output limit current low-level I

Output limit current medium-level I

Output limit current high-level I

340 400 460 mA GSW=L

TLL

680 800 920 mA GSW=M

TLM

1020 1200 1380 mA GSW=H

TLH

<FG/FG3 output >

High level voltage V

Low level voltage V

4.6 － － V IFG=-100µA

FGH

－ － 0.4 V IFG=+100µA

FGL

<Booster voltage >

Charge pump output voltage V

12.5 17 19 V

PUMP

<CP1 output >

Upper side saturation voltage V

Lower side saturation voltage V

0.25 0.45 0.65 V ICP1=-4mA

CP1H

0.2 0.4 0.6 V I

CP1L

<CP2 output >

Upper side saturation voltage V

Lower side saturation voltage V

0.4 0.6 0.8 V I

CP2H

0.15 0.35 0.55 V I

CP2L

Technical Note

=±600mA

I

OUT

(upper + lower side)

VCC= 5V,VM=12V
CP1=CP2=0.1µF

=+4mA

CP1

=-4mA

CP2

=+4mA

CP2

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4/17

2010.06 - Rev.

BA6859AFP-Y,BA6664FM,BD6671FM

A

●Block Diagram, application Circuit Diagram and Pin Function

1) BA6859AFP-Y

Fig.4 BA6859AFP-Y Block Diagram

BA6859AFP-Y Pin Function Table

Pin No. Pin name Function

1 N.C. N.C.
2 N.C. N.C.
3 N.C. N.C.

Pd (W)

2.0

1.45

1.0

0

* Reduced by 11.6 mW/℃ over 25℃, when mounted on a glass epoxy

25 85

Fig.5 Power Dissipation Reduction (BA6859AFP-Y)

board (70 mm x 70 mm x 1.6 mm).

100 50 75 150

125

Ta(℃)

4 A3 Output pin
5 A2 Output pin
6 A1 Output pin
7 GND GND pin
8 H1+ Hall signal input pin

9 H1- Hall signal input pin
10 H2+ Hall signal input pin
11 H2- Hall signal input pin
12 H3+ Hall signal input pin
13 H3- Hall signal input pin
14 VH Hall bias input pin
15 BR Brake mode selection pin

16 CNF

17 SB Short brake pin
18 FR Rotation detection pin
19 ECR Output voltage control reference pin
20 EC Output voltage control pin
21 PS Power-saving pin
22 FG FG signal output pin
23 VCC Power supply pin
24 VM Motor power supply pin

25 RNF

FIN FIN GND

Capacitor connection pin for phase
compensation

Resistance connection pin for output
current detection

Technical Note

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© 2010 ROHM Co., Ltd. All rights reserved.

5/17

2010.06 - Rev.

BA6859AFP-Y,BA6664FM,BD6671FM

A

r

2) BA6664FM

Hall1

Hall1

Hall1

Output to the motor will be opened at a chip tempe
175°C (Typ.). Do not use the IC in excess of a chip
rature of temperature of 150°C.

A3

2

A2

4

A1

7

HALL AMP

GND

8

H1+

9

-

H1

10

H2+

11

H2-

12

H3+

13

-

H3

14

Output will be open when the reverse rotation of the motor is
detected.

DRIVER

GAIN

CONTROL

CURRENT

TL

+

-

+

-

+

-

+

-

+

-

+

-

SENSE AMP

D Q

CK

TSD

GAIN

SWITCH

VCC

-+

PS

TORQUE
SENSE AMP

VCC

VCC

R

－

SHORT BRAKE

Q

BRAKE MODE

FIN

Torque limit current and I/O gain settings are made by
the RNF resistance value.
Resistance of 0.4 to 1.0Ω is recommended.

0.5Ω

RNF

28

RNF

VM

27

GSW

26

VCC

25

FG

24

PS

23

EC

22

ECR

21

FR

20

FG2

19

SB

18

CNF

17

BR

16

VH

15Hall Bias

500Ω

0.1µF

V

M

+

1µF

-

SERVO
SIGNAL

500Ω

Capacitor for noise level mitigation.
The recommended value is 0.47 µF to 10 µF.

+

1µF

-

I/O gain

Speed detection is attained by FG signal output.

The power saving mode is turned ON by low-level voltage,
and the circuit current and motor output will stop.

The motor torque current is controllable.

If the ECR voltage is set between 1.6 and 2.2V, the
maximum torque limit current will be obtained.

The detection of motor rotation direction is possible.

The short brake is operated regardless of brake mode settings.

Connect a capacitor for phase compensation.
The recommended value is 0.1µF.

Short brake and reversed brake settings are possible.

Resistor for setting Hall input level .
The recommended value is 200 Ω to 1k Ω.

Fig.6 BA6664FM Block Diagram

BA6664FM Pin Function Table

Pin No. Pin name Function

1 N.C. N.C.

2 A3 Output pin

3 N.C. N.C.

4 A2 Output pin

5 N.C N.C.

6 N.C. N.C.

7 A1 Output pin

Pd[W]

8 GND GND pin

9 H1+ Hall signal input pin
10 H1- Hall signal input pin

2.2

2.0

11 H2+ Hall signal input pin
12 H2- Hall signal input pin
13 H3+ Hall signal input pin
14 H3- Hall bias input pin
15 VH Hall bias input pin
16 BR Brake mode pin

Capacitor connection pin for phase
compensation

1.0

17 CNF

18 SB Short brake pin
19 FG2 FG 3-phase component output pin
20 FR Rotation detection pin

0 25 50 75 100 125 150

85

Ta(℃)

21 ECR Output voltage control reference pin
22 EC Output voltage control pin
23 PS Power-saving pin

Fig.7 Power Dissipation Reduction (BA6664FM、BD6671FM)

* Reduced by 11.6 mW/℃ over 25℃, when mounted on a glass epoxy board

(70 mm x 70 mm x 1.6 mm).

24 FG FG signal output pin
25 VCC Power supply pin
26 GSW Gain switching pin
27 VM Motor power supply pin

28 RNF

Resistance connection pin fo
current detection

FIN FIN GND

Technical Note

output

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6/17

2010.06 - Rev.

BA6859AFP-Y,BA6664FM,BD6671FM

A

3)BD6671FM

0.1 µ F

0.1 µF

0.047µF

200Ω

H1

1000pF

H2

1000pF

H3

200Ω

Vcc

Vcc

10µ F

1000pF

MODE

H1+

H1-

H2+

H2-

H3+

H3

GSW

FIN

GND

CP1

CP2

VG

CNF

Vcc

-

Hall comp

＋

－

Hall Amp

＋
－

＋
－

Gain

control

Charge

Pump

Matrix

EXOR

＋

+

-

+

-

+

-

OSC

D Q

CK QB

PWM

Comp

UVLO

Current Limit Comp

TSD

Matrix

Current

Sense AMP

REVERSE

DETECT

＋

－

＋

－

U-Pre

Driver

L-Pre

Driver

CL

Driver

Torque

AMP

PS

FG3

FG

VH

Hall
bias

VM

A1

RNF

A2

FIN

RNF1

A3

RNF2

PS

EC

＋

ECR

－

VM

※ 1 Set capacitor between VM and GND, close as possible to the IC.
※2 To prevent from concentration of current routes, make the wiring

impedance values from the power supply equal as possible.

Fig.8 BD6671FM Block Diagram

BD6671FM Pin Function

Pin No Pin name Function Pin No Pin name Function

1 H1+ Hall signal input pin 15 VM Motor power supply pin

2 H1- Hall signal input pin 16 ECR Output voltage control reference pin

3 H2+ Hall signal input pin 17 EC Output voltage control pin

4 H2- Hall signal input pin 18 PS Power-saving pin

5 H3+ Hall signal input pin 19 RNF2

Resistance connection pin for output
current detection

6 H3- Hall signal input pin 20 A3 Output pin

7 GSW Gain switching pin 21 RNF1

Resistance connection pin for output
current detection

8 GND GND 22 A2 Output pin

9 CP1

10 CP2

Charge pump capacity connection
pin 1
Charge pump capacity connection
pin 2

23 RNF1

24 A1 Output pin

Resistance connection for output
current

11 VG Charge pump output pin 25 VM Motor power supply pin

12 CNF

Capacitor connection pin for phase
compensation

26 VH Hall bias pin

13 MODE Brake mode switching pin 27 FG FG Output pin

14 VCC Power supply pin 28 FG3 FG3 Output pin

FIN FIN GND

*Heat radiation FIN: GND

0.5

10kΩ

servo

signal

100µ F

※

2

※

Ω

1.65V

1

Technical Note

0.01µF

Vcc

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7/17

2010.06 - Rev.

BA6859AFP-Y,BA6664FM,BD6671FM

A

●I/O logic

1) BA6859AFP-Y

Input conditions

Pin. No 8 9 10 11 12 13 6 5 4 6 5 4

H1 + H1 - H2 + H2 - H3 + H3

1 L M H M M M H L L L H H

Output conditions

Forward rotation Reverse rotation

A1 A2 A3 A1 A2 A3

-

Technical Note

2) BA6664FM

2 H M L M M M L H H H L L

Input voltage

3 M M L M H M L H L H L H

4 M M H M L M H L H L H L

5 H M M M L M L L H H H L

6 L M M M H M H H L L L H

Note: Forward rotation EC<ECR
Reverse rotation EC>ECR

Input conditions

Forward rotation Reverse rotation

Output conditions

Pin. No 9 10 11 12 13 14 7 4 2 7 4 2

H1 + H1 - H2 + H2 - H3 + H3

A1 A2 A3 A1 A2 A3

-

1 L M H M M M H L L L H H

2 H M L M M M L H H H L L

Input voltage

3 M M L M H M L H L H L H

4 M M H M L M H L H L H L

5 H M M M L M L L H H H L

Hi=2.6V
Mid=2.5V
Low=2.4V

Hi=2.6V
Mid=2.5V
Low=2.4V

3)BD6671FM

6 L M M M H M H H L L L H

Note: Forward rotation EC<ECR
Reverse rotation EC>ECR

Output conditions

Input conditions

Forward rotation

Reverse rotation

(MODE=L)

Reverse rotation

(MODE=H)

Pin. No 1 2 3 4 5 6 24 22 20 24 22 20 24 22 20

H1 + H1 - H2 + H2 - H3 + H3

A1 A2 A3 A1 A2 A3 A1 A2 A3

-

1 L M H M M M H L L L H H L L L

2 H M L M M M L H H H L L L L L

Input voltage

3 M M L M H M L H L H L H L L L

4 M M H M L M H L H L H L L L L

5 H M M M L M L L H H H L L L L

6 L M M M H M H H L L L H L L L

Note: Forward rotation EC<ECR
Reverse rotation EC>ECR

Hi=2.6V
Mid=2.5V
Low=2.4V

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8/17

2010.06 - Rev.

BA6859AFP-Y,BA6664FM,BD6671FM

A

●I/O Timing Chart

1) BA6859AFP-Y, BA6664FM

2) BD6671FM

H1+

H2+

H3+

A1

Output current

H1 - + H2+

A1

Output current

A2

Output current

H2 - + H3+

A2

Output current

A3

Output current

H3 - + H1+

A3

Output current

A1 Output current

A1 Output voltage

A2 Output voltage

A2 Output current

H1+

H2+

H3+

30

30°

Technical Note

Fig. 9

°

Fig. 10

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9/17

2010.06 - Rev.

BA6859AFP-Y,BA6664FM,BD6671FM

A

●I/O Circuit

1) BA6859AFP-Y
(1) Power saving (pin 21) (6) FG output (pin 22)

21

Torque command input (pin 19, pin 20)

(2)

20

Coil output (A1: pin 6, A2: pin 5, A3: pin 4)

(3)

Hall input (H1+ : 8 pin, H1- : 9 pin, H2+ : 10 pin,

(4)
H2- : 11 pin, H3+ : 12 pin, H3- : 13 pin)

Hall bias(14 pin)

(5)

1kΩ

1KΩ

15KΩ

6

10KΩ

100KΩ

1kΩ

RNF

5

4

14

19

VM

External RNF Register

GND

1KΩ

VCC

(7) FR output (pin 18)

30kΩ

(8)

Short brake (17 pin)

(9) Brake mode (15 pin)

15

10kΩ

15kΩ

10kΩ

18

22

Technical Note

13kΩ 500Ω 500Ω 10kΩ

12kΩ 5kΩ 1kΩ

17

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© 2010 ROHM Co., Ltd. All rights reserved.

10/17

2010.06 - Rev.

BA6859AFP-Y,BA6664FM,BD6671FM

A

2) BA6664FM
(1) Power saving (23 pin) (7) FG output (19 pin)

23

15KΩ

10KΩ

VCC

Torque command input (21 pin, 22 pin)

(2)

(8) FR output (20 pin)

22

1kΩ

1kΩ

21

VCC

(3)

Coil output (A1 : 7 pin, A2 : 4 pin, A3 : 2 pin)

7

4

VM

External RNFRegister

RNF

2

Short Brake mode (18 pin)

(9)

(4) Hall input (H1+ : 9 pin, H1- : 10 pin, H2+ : 11 pin,
H2- : 12 pin, H3+ : 13 pin, H3- : 14 pin)

1KΩ

1KΩ

(10)Brake mode (16 pin)

Hall bias (15 pin)

(5)

15

16

(11)

Gain switch (26 pin)

FG output (24 pin)

(6)

VCC

100KΩ

26

100KΩ

1KΩ

30KΩ

10kΩ

24

Technical Note

5kΩ

19

30kΩ

20

13kΩ 500Ω 500Ω 10kΩ

18

12kΩ 5kΩ 1kΩ

15kΩ

10kΩ

5KΩ

5KΩ

56KΩ

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11/17

2010.06 - Rev.

BA6859AFP-Y,BA6664FM,BD6671FM

A

1K

Ω

Technical Note

3) BD6671FM
(1) Hall input (H1 : 1 pin, H1-: 2 pin, H2+ : 3 pin, (6) Brake mode selection pin (13 pin)
H2- : 4 pin, H3+ : 5 pin, H3- : 6 pin)

Hn

+

VCC

1KΩ

VCC

Hn

-

13

VCC

30KΩ

20KΩ

1KΩ 1KΩ

25KΩ

(2) Gain switch (7pin) (7) Torque amp (ECR : 16 pin, EC : 17 pin)

VCC

7

1KΩ

VCC

75KΩ

100KΩ

10KΩ

10KΩ

25KΩ

VCC

16,17 1KΩ

(3)CP1 output (9pin) (8) Power saving (18 pin) (9)RNF2(19 pin)

VCC VCC

VCC

VCC

50Ω

9

18

30KΩ

20KΩ

19

1KΩ

(4) CP2 / VG output (CP2 : 10 pin, V

: 11 pin) (10) Output pin (A1 : 24 pin, A2 : 22 pin, A3 : 20 pin)

G

VM

50Ω

11

V

M

50Ω

10

24 22

20

RNF1

(5) CNF pin (12 pin) (11) Hall bias (26 pin) (12) FG / FG3 output (FG : 27 pin, FG3 : 28 pin)

VCC

VCC

VCC

VCC

12

50Ω

26

50Ω

27,28

2KΩ

100KΩ

710Ω

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© 2010 ROHM Co., Ltd. All rights reserved.

12/17

2010.06 - Rev.

BA6859AFP-Y,BA6664FM,BD6671FM

A

Technical Note

●Operation Explanation

●Torque Command

Rotation direction

EC<ECR Forward

EC>ECR Reverse*

*Stops after detecting reverse rotation

R

[V]

Forward

NF

Offset voltage -

Offset voltage +

The I/O gain G
by the RNF detection resistor.
①(BA6859AFP-Y)

G

=0.35/RNF [A/V] ･････(1)

EC

from the EC pin to the RNF pin (output current) is determined

EC

②(BA6664FM)

G

=0.325/RNF [A/V] (GSW=L)

ECL

=0.60/RNF [A/V] (GSW=OPEN)

G

3mV

1.65(ECR)

Fig.11

E

[V]

C

ECM

G

=1.4/RNF [A/V] (GSW=H)

ECH

③(BD6671FM)

=0.175/RNF [A/V] (GSW=L)

G

ECL

=0.35/RNF [A/V] (GSW=M)

G

ECM

G

=0.70/RNF [A/V] (GSW=H)

ECH

④The following torque limit current ITL is obtained (BA6859AFP-Y, BA6664FM)

ITL=0.35/RNF [A]･･･････････････････(2)

⑤(BD6671FM)

I

=0.2/RNF [A] (GSW=L)

TLL

=0.4/RNF [A] (GSW=M)

I

TLM

I

=0.6/RNF [A] (GSW=H)

TLH

The value will become smaller than the computed value due to the wiring
capacity and other factors, if the RNF resistance is 0.5Ω or below.

●Set-up of Motor Rotation Direction and Voltage Range of Torque Control Reference Terminal.

The motor rotation direction determined by the torque control terminal voltage EC and the torque control reference terminal
voltage ECR

Torque control input voltage Rotation direction

EC<ECR Forward torque

EC>ECR Reverse torque

Io

ITL

Forward torque

Reverse torque

0.5 3.3 5.0

2.5

Fig.12

EC[V]

The relation between the input gain and torque limit current expressed as (1) and (2) discussed previously is only valid
when EC and ECR are within a range from 0.5V to 3.3V. Depending on how the torque control reference terminal voltage,
ECR is specified, there may be a case when the output current for the motor does not go up to the torque limit value.
Please be aware of this voltage range when specifying the ECR voltage.

For BA6859AFP-Y, BA6664FM and BD6671FM, 1.6V～2.2V is recommended.

If above conditions are understood, the voltage input range to the EC and ECR terminals can be from 0V to VCC.

●Power Saving

The input circuit specified in I/O circuit 1) BA6859AFP-Y (1) is used for power saving input.

The power saving pin has a temperature characteristic of approximately –5 mV/℃ and also the built-in resistors has a dispersion of 30%.
Keep the input voltage range in mind.

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© 2010 ROHM Co., Ltd. All rights reserved.

13/17

2010.06 - Rev.

BA6859AFP-Y,BA6664FM,BD6671FM

A

Technical Note

●Reverse Rotation Detection Function

Actual motor rotation at reverse detection

H2+
H2-

H3
H3-

+

-

+

+

-

EC
ECR

D-FF

Q

D

CK

+

-

H:OUTPUT.OPEN
(HIGH-IMPEDANCE)

When the motor rotates in the reverse direction, the reverse rotation
detection function will operate and the output will be in an open state.

Fig.13

EC < ECR: Forward torque (forward rotation)

EC > ECR: Deceleration (forward rotation)

The motor rotates in a reverse direction with inertial force.

Fig. 13 shows the construction of the reverse rotation detection circuit.
・Forward rotation (EC<ECR)

Stop

Fig. 9 shows the phase relation of the H2+ and H3+ Hall input signals,
in which case the reverse rotation detection circuit will not work.

・Reverse rotation (EC>ECR)

The phase relation of the H2+ and H3+ signals are opposite to that when the motor is rotating in the forward direction.
Therefore, the reverse rotation detection circuit operates, and the output is turned off and open.

●FR Signal Output (BA6859AFP-Y, BA6664FM)

FR output signal pin outputs the FR signal of low(L) or high(H) after detecting the motor rotation direction.

Motor rotation direction FR signal output

Forward “H”

Reverse “L”

●Brake Mode Change (BA6664FM, BD6671FM)

By applying high-level voltage to the BR pin, the brake mode for the following condition can be changed: EC > ECR.

EC<ECR EC>ECR

BR

L Forward rotation Reverse rotation brake

H Forward rotation Short brake

When the BR pin is set to high level and used in short-brake mode, open the SB pin.
The BR pin has a temperature characteristics of approximately -5 mV/℃. Use the BR pin within the permissible input range.

●Short Brake (BA6859AFP-Y, BA6664FM)

OFF OFF OFF

ON ON ON

When the short-brake pin is set to high level, as shown in Fig.18, the output
transistor (3-phase) on the high side will be turned off and the output transistor
(3-phase) on the low side will be turned on. The short brake pin has a
temperature characteristic of approximately -5 mV/℃. Keep the input voltage
range (see Fig12) in mind.

MOTOR

Fig.14

●Hall Input

The Hall element allows both serial and parallel connections.

VCC

VCC

Set the Hall input voltage between 1.0 and 4.0 V. Compute the
resistance between the VH and VCC pins in consideration of the

H1

H3

H2 H1

H2

H3

flowing current of the Hall device.

15-pin (Hall Bias)

Parallel Connection

Fig.15

15-pin (Hall Bias)

Serial Connection

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© 2010 ROHM Co., Ltd. All rights reserved.

14/17

2010.06 - Rev.

BA6859AFP-Y,BA6664FM,BD6671FM

A

Technical Note

●FG Signal Output / FG2 Signal Output

The FG signal output/FG2 signal output terminals are for detecting the motor rotation speed. The output frequency of FG2
signal is three times higher than the FG frequency signal output. So, it is suitable for the slow speed rotation detection.
However, due to the Hall device variation and other reasons, the duty cycle may not reach 50% in some instances.

H1+
H1-

H2+
H2-

H3+
H3-

H1

+

-

H2

+

-

H3

+

-

FG2

FG

Fig. 16

H1 waveform

waveform

H

2

waveform

H

3

FG waveform

FG2 waveform

●Notes for use

Fig. 17

(1) Absolute maximum ratings

This product is subject to a strict quality management regime during its manufacture. However, damage may result if
absolute maximum ratings such as applied voltage and operating temperature range are exceeded. Assumptions should
not be made regarding the state of the IC (short mode or open mode) when such damage is suffered. A physical safety
measure such as a fuse should be implemented when use of the IC in a special mode where the absolute maximum
ratings may be exceeded is anticipated.

(2) Connecting the power supply connector backward

Connecting the power supply connector backwards may result in damage to the IC. Insert external diodes between the
power supply and the IC's power supply pins as well as the motor coil to protect against damage from backward
connections.

(3) Power supply lines

As return of current regenerated by back electromotive force of motor happens, take steps such as putting capacitor
between power source and GND as an electric pathway for the regenerated current. Be sure that there is no problem with
each property such as emptied capacity at lower temperature regarding electrolytic capacitor to decide capacity value. If
the connected power supply does not have sufficient current absorption capacity, regenerative current will cause the
voltage on the power supply line to rise, which combined with the product and its peripheral circuitry may exceed the
absolute maximum ratings. It is recommended to implement a physical safety measure such as the insertion of a voltage
clamp diode between the power supply and GND pins.

(4) GND potential

Ensure a minimum GND pin potential in all operating conditions.

(5) Setting of heat

Take the power dissipation Pd) into account for practical application and make thermal design with sufficiently margined.

(6) Pin short and mistake fitting

Use caution when orienting and positioning the IC for mounting on printed circuit boards. Improper mounting may result
in damage to the IC. Shorts between output pins or between output pins and the power supply and GND pins caused by
the presence of a foreign object may result in damage to the IC.

(7) Actions in strong magnetic field

Use caution when using the IC in the presence of a strong magnetic field as doing so may cause the IC to malfunction.

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15/17

2010.06 - Rev.

BA6859AFP-Y,BA6664FM,BD6671FM

A

P

iti

Technical Note

(8) ASO

When using the IC, set the output transistor so that it does not exceed absolute maximum ratings or ASO.

(9) Thermal shutdown circuit (TSD)

This IC incorporates a TSD circuit. If the chip becomes the following temperature, coil output to the motor will be open.
The TSD circuit is designed only to shut the IC off to prevent runaway thermal operation. It is not designed to protect the
IC or guarantee its operation. Do not continue to use the IC after operating this circuit or use the IC in an environment
where the operation of the TSD circuit is assumed.

TSD ON temperature [℃] (typ.) Hysteresis temperature [℃] (typ.)

BA6859AFP-Y 175 25

BA6664FM 175 15

BD6671FM 170 25

(10) Regarding input pin of the IC

This monolithic IC contains P+ isolation and P substrate layers between adjacent elements in order to keep them isolated.
P/N junctions are formed at the intersection of these P layers with the N layers of other elements to create a variety of
parasitic elements.
For example, when the resistors and transistors are connected to the pins as shown in Fig. 18,

○the P/N junction functions as a parasitic diode

when GND > (Pin A) for the resistor or GND > (Pin B) for the transistor (NPN).

○Similarly, when GND > (Pin B) for the transistor (NPN), the parasitic diode described above combines

with the N layer of other adjacent elements to operate as a parasitic NPN transistor.
The formation of parasitic elements as a result of the relationships of the potentials of different pins is an inevitable result
of the IC's architecture. The operation of parasitic elements can cause interference with circuit operation as well as IC
malfunction and damage. For these reasons, it is necessary to use caution so that the IC is not used in a way that will
trigger the operation of parasitic elements, such as by the application of voltages lower than the GND (P substrate)
voltage to input pins.

Pin A

+

P

P

N

P

GND

Resistor Transistor (NPN)

+

N N

P substrate

Pin A

aras

element

Pin B

+

P

N

c

Parasitic element

B

C

E

N

GND

P

P

P substrate

Pin B

+

N

GND

B C

E

GND

Other adjacent
elements

Fig.18 Example of IC structure

(11) Testing on application boards

When testing the IC on an application board, connecting a capacitor to a pin with low impedance subjects the IC to stress.
Always discharge capacitors after each process or step. Ground the IC during assembly steps as an antistatic measure,
and use similar caution when transporting or storing the IC. Always turn the IC's power supply off before connecting it to
or removing it from a jig or fixture during the inspection process.

(12) Ground Wiring Pattern

When using both small signal and large current GND patterns, it is recommended to isolate the two ground patterns,
placing a single ground point at the application's reference point so that the pattern wiring resistance and voltage
variations caused by large currents do not cause variations in the small signal ground voltage. Be careful not to change
the GND wiring pattern of any external parts, either.

Parasitic
element

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© 2010 ROHM Co., Ltd. All rights reserved.

16/17

2010.06 - Rev.

BA6859AFP-Y,BA6664FM,BD6671FM

A

●Ordering part number

B A 6 6 6 4 F M - E 2

HSOP25

HSOP-M28

Part No.
BA

BD

1.9 ± 0.1

9.9± 0.3

7.5± 0.2

1.25

2.2± 0.1

0.11

Part No.

13.6 ± 0.2

(MAX 13.95 include BURR)

2.75 ± 0.1

25 14

7.8 ± 0.3

5.4 ± 0.2

1

1.95 ± 0.1

0.8

0.11

0.36 ± 0.1

12.0 ± 0.2

18.5± 0.2

(MAX 18.85 include BURR)

28

1

5.15± 0.1

0.37± 0.1

0.8

6859A
6664
6671

13

Package

FP-Y : HSOP25
FM : HSOP-M28

Packaging and forming specification
E2: Embossed tape and reel

<Tape and Reel information>

Embossed carrier tapeTape

Quantity

Direction
of feed

0.3Min.

0.25 ± 0.1

S

0.1 S

(Unit : mm)

<Tape and Reel information>

+6°

4°

0.1 S

0.27

S

(Unit : mm)

−4°

0.5± 0.2

+0.1

−0.05

1.2± 0.15

15

14

Quantity

Direction
of feed

2000pcs
E2

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

Reel

Embossed carrier tapeTape
1500pcs

E2

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

Reel

1pin

Order quantity needs to be multiple of the minimum quantity.

∗

1pin

Order quantity needs to be multiple of the minimum quantity.

∗

Technical Note

Direction of feed

Direction of feed

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17/17

2010.06 - Rev.

Notes

No copying or reproduction of this document, in part or in whole, is permitted without the
consent of ROHM Co.,Ltd.

The content specied herein is subject to change for improvement without notice.

The content specied 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 specications,
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 specied 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 specied 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.

Notice

The Products specied in this document are intended to be used with general-use electronic
equipment or devices (such as audio visual equipment, ofce-automation equipment, commu­nication devices, electronic appliances and amusement devices).

The Products specied 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, re or any other damage caused in the event of the
failure of any Product, such as derating, redundancy, re 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, fuel­controller 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 specied 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.

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R1010

A