Datasheet FAN8486D Datasheet (Fairchild Semiconductor)

FAN8486D (KA3086D)

2-Phase BLDC Motor Driver

www.fairchildsemi.com

Features

• Drives the BLDC motor using 2 hall sensors.

• 2-phase, full-wave drive method

• Built-in thermal shutdown (TSD) circuit

• Controls the motor speed through voltage

• Built-in bandgap circuit

• Built-in frequency Generator (FG) & Phase Generator
(PG) amplifier & comparator.

Descripiton

The FAN8486D is a monolithic integrated circuit, and it is
suitable for drum motor driver of VCR system.

28-SSOP-300SG

Typical Applications

• Video cassette recorder (VCR) cylinder (drum) motor

• Other 2-phase BLDC motor

©2000 Fairchild Semiconductor International

Ordering Information

Device Package Operating Temp.

FAN8486D 28-SSOP-300SG −25°C ~ +75°C

FAN8486DTF 28-SSOP-300SG −25°C ~ +75°C

Rev. 1.0.1

February. 2000.

FAN8486D (KA3086D)

Pin Assignments

SGND

VCTL

H2P

FGAMPOUT

FGIN

FGOUT

VREG

PG(V25)

FG(V25)

PGAMPOUT

PGIN

1920212223242526

H2N

PGOUT

1428 27

161718

H1N

15

FAN8486D

23

14

NC

PVCC2

45 7 9

NC

NC

6

OUT2P

PGND2

8

OUT2N

OUT1P

PGND1

11

10

OUT1N

12

NC

PVCC1

14

13

H1P

SVCC

2

Rev. 1.0.1

February. 2000.

Pin Definitions

Pine Number Pin Name I/O Pin Function Description

1 PVCC2 - Power supply voltage2
2NC -­3NC -­4NC -­5 OUT2P O Output drive 2(P)
6 PGND2 O Power ground 2
7 OUT2N O Output drive 2(N)
8 OUT1P O Output drive 1(P)

9 PGND1 O Power ground 1
10 OUT1N - Output drive 1(N)
11 NC - ­12 PVCC1 - Power supply voltage1
13 SVCC - Signal supply voltage
14 H1P I Hall signal input 1P
15 H1N I Hall signal input 1N
16 H2P I Hall signal input 2P
17 H2N I Hall signal input 2N
18 PGOUT O Phase generate output
19 PGAMPOUT O Phas e generate amp. output
20 PGIN I P hase generate input
21 PG(V25) - Reference voltage for PG
22 VREG - Regulated voltage
23 FG(V25) - Reference voltage for FG
24 FGIN I Frequency generate input
25 FGAMPOUT O Frequency generate amp. output
26 FGOUT O Frequency generate output
27 VCTL I Voltage control(motor speed control)
28 SGND - Signal ground

FAN8486D (KA3086D)

Rev. 1.0.1

February. 2000.

3

FAN8486D (KA3086D)

Internal Block Diagram

SGND

FGOUT

VCTL

H2P

FGIN

FG(V25)

VREG

FGAMPOUT

PG(V25)

PGAMPOUT

PGIN

1920212223242526

PGOUT

H2N

1428 27

161718

H1N

15

CTL

V

YS.
H

NC

COM

Control

NC

CTL

I

Current/Voltage

23

14

PVCC2

−

+

AMP

45 7 9

REF

REG

V

DRIVER

(5.0V)

V

Supply ea c h block

TSD

6

NC

OUT2P

PGND2

OUT2N

+

REF

V

8

OUT1P

AMP

-

HYS.

COM

DRIVER

10

11

NC

OUT1N

PGND1

+ -

±

AMP

GM

GM
±

12

PVCC1

13

+ -

SVCC

AMP

14

H1P

4

Rev. 1.0.1

February. 2000.

Equivalent Circuits

Description Pin No. Internal circuit

V

CTL

Motor output 5,7,8,10

27

V

REG

50

27

V

CC

1k

FAN8486D (KA3086D)

I

CTL

Hall input 14,15,16,17

V

REG

5
8

50

14
16

500

I

CTL

Vcc

7
10

500 50

15
17

Rev. 1.0.1

February. 2000.

5

FAN8486D (KA3086D)

Equivalent Circuits (Continued)

Description Pin No. Internal circuit

PG, FG

amplifier

19,20
24,25

V

REG

PG, FG

hysteresis

amplifier

18,19,25,26

V

CC

50

20
24

V

REG

50

19
25

1k

V

CC

V

25

V

REG

V

25

V

CC

50

19
25

V

CC

50

18
26

6

Rev. 1.0.1

February. 2000.

FAN8486D (KA3086D)

Absolute Maximum Ratings (Ta=25°°°°C)

Parameter Symbol Value Unit Remark

Supply voltage V
Maxium output current I

output current I

V

REG

Power dissipation P
Operating temperature T
Storage temperature T

Notes:

1. Duty 1 / 100, pulse wid th 50 0µs

2. 1) When mounted on glass epoxy PCB (76.2 × 114 × 1.57mm)

2) Power dissipation reduces 8.0mW /

3) Do not exceed Pd and SOA(Safe Operating Area).

CCmax

Omax

REGmax

d

OPR

STG

°C for using above Ta=25°C. (Without heat-sink)

18 V -

note1

1.0

A-

30 mA -

note2

1

W No heat sink

−25 ~ +75 °C-

−45 ~ +125 °C-

Power Dissipation Curve

Pd (mW)

2, 000

SOA

0

0 25 50 75 100 125

Recommened Operating Conditions (Ta=25°°°°C)

Parameter Symbol Min. Typ. Max Unit

Operating supply voltage V

CC

81216V

150 175

Ambient temperature, Ta [°C]

Rev. 1.0.1

February. 2000.

7

FAN8486D (KA3086D)

Electrical Characteristics

(Ta=25°C, VCC=12V, unless otherwise specified)

Parameter Symbol Condition Min. Typ. Max. Unit

FULL CIRCUIT

Quiescent current I

VOLTAGE REGULATOR

Regulated voltage V
Regulated voltage V

HALL INPUT

Hall minimum input level

note

Hall bias current I

OUTPUT DIRVE

Output saturation voltage (Upper) V
Output saturation voltage (Lower) V

Output current A I

Output current B I

VOLTAGE CONTROL

reference voltage

V

CTL

V

injput range

CTL

offset range V

V

CTL

V

input bias current I

CTL

note

note

Q

REG
REG

V

INH
BH

SU

SL

OUTA

OUTB

V

25

V

CTL
OFF

VCTL

VCC=12V - 8.5 13 mA

VCC=12V 4.6 5.0 5.4 V
VCC=12V, I

=−20mA 4.6 5.0 5.4 V

REG

-50--mVp-p

V

=2.0V, Hall=2.5V - 0.25 2.0 µA

CTL

V

=4.5V - 1.3 2.0 V

CTL

V

=4.5V - 2.0 2.0 V

CTL

V

=2.6V

H1P

V

HALL_1N

V

H2P

V

H2N

0.48 × V

=2.4V, V

=2.6V
=2.4V, V

REG

CTL

CTL

=2.5V

=3.5V

-0-V
V

=0 ~ V
V
V

∆I
V
V

CTL
CTL
CTL

O
H1P
H1N

/ ∆V

CTL

=2.5V - 1.0 6.0 µA
=2.8V, 3.3V

CTL

=2.6V,
=2.4V

500 700 900 mA

500 700 900 mA

2.0 2.3 2.5 V

REG

V

−150 0 +150 mV

I

Voltage control gain G

NOTE:

The note in the chart means items calculated and approved in design not the items proven by actual test result.

M

8

O

0.48 × V

February. 2000.

0.55A/V(TYP)

(TYP) V

REG

Rev. 1.0.1

0.38 0.55 0.64 A / V

CTL

Electrical Characteristics (Continued)

(Ta=25°C, VCC=12V, unless otherwise specified)

Parameter Symbol Condition Min. Typ. Max. Unit

FULL CIRCUIT

Shutdown temperature
Temperature hysteresis

FG / PG AMP

Input offset voltage V
Input current I
Open loop gain

note

Output high voltage V
Output low voltage V

COMPARATOR (HYSTERESIS)

Hysteresis level V
Output low voltage V
Output pull-up resistance V

note

note

TSD - 130 160 - °C

T

HYS

OFS

AMP_IN

G

OHA

OLA

HYS

OLHYS

BHYS

VIN=2.5V - 0.2 2.0 µA
VCC=12V, Signal=500Hz 65 70 - dB

A

VIN=2.0V
VIN=2.7 - 0.85 1.45 V

VIN=2.0V - 0.12 0.32 V

FAN8486D (KA3086D)

--30-°C

--0± 8mV

V

REG

−1.48

V

REG

−0.74

-V

- ±130 ±165 ±200 mV

- 7.0 10 13 kΩ

NOTE:

The note in the chart means items calculated and approved in design not the items proven by actual test result.

Rev. 1.0.1

February. 2000.

9

FAN8486D (KA3086D)

Application Informations

1. A Diagram Summarizing The Entire System

I

V

TSD

C

AMP. DRIVER

REG

HALL+

HALL−

V

CTL

Hall_IN

V / I

Converter

I

C

I

4I

C

4I

C

2I

C

I

f

G

M

O

R2

FG_OUT

PG_OUT

FG_IN

PG_IN

R1

AMP &
COMP

AMP &
COMP

Figure 1.

Figure 1 is a conceptual diagram of the FAN8486D. It turns on or off depending on the signal of the hall sensor used for sens­ing the rotor position of motor.

The AMP, G

(Feedback) and output blocks are circuits used to determine current gain of FAN8486D.

M

Furthermore, HallIN represents the hall signal switch.

It supplies stable bias to each V

block. The TSD block is a thermal shutdown circuit that protects the IC during an high

REG

temperature inside the IC.

Moreover, FG. and PG. blocks output individual signals generated in the motor using the amplifier and comparator.

These signals transmit motor speed and position data to controller of external servo etc. for their control.

2. Current Control

Figure 2 simplifies figure 1.

The supplied I

Figure 3 is a graph of I

10

current drives the motor and the Ic current controls the motor speed.

O

vs. IO.

CTL

Rev. 1.0.1

February. 2000.

I

CTL

I

Omax

FAN8486D (KA3086D)

I

O

A

T

Figure 2.

I

O

A

T

I

COmax

I

CTL

Figure 3.

3. Voltage Control

Even though FAN8486D command uses Ic to control the magnitude of IO, it can also use voltage. FAN8486D mainly uses
voltage cont rol and has op tion to use current control.

I

V

CTL

V / I

Converter

CTL

Figure 4 shows the principle of the voltage control.

The V

Figure 5 shows the graph of V

is the motor speed control voltage, and the I

CTL

vs. IO.

CTL

A

T

Figure 4.

is converted to current through the V / I converter.

CTL

I

O

I

Omax

I

O

A

0.48 × V

T

REG

(TYP)

G

M

V

CTL

Figure 5.

Rev. 1.0.1

February. 2000.

11

FAN8486D (KA3086D)

Typical Performance Characteristics

5.0

4.0

(V)

3.0

REG

V

2.0

1.0

0.0
0 2 4 6 8 101214161820

V

(V)

CC

1.VCC vs V

12

10

8

(mA)

6

CC

I

4

2

0

8 1012141618

V

(V)

CC

3.VCC vs I

CC

V

REG

V

V

CTL

RL = 10 KΩ

RL = 10KΩ

CTL

= 3.5V

= 3.5V

CTL

= 0V

5

4

(V)

3

REG

V

2

V

= 0V

1

0

-30-20-10 0 10 20 30 40 50 60 70 80 90
Temperature(℃)

Temperature(°C)

2.Temp. vs V

0.63

0.58

0.53

0.48

GM1(A/V)

0.43

0.38
8 1012141618

V

(V)

CC

V

REG

V

CTL

CC

CTL

= 12V

= 3.5V

4.VCC vs GM1

12

900

850

800

750

700

(mA)

O

I

650

600

550

500

8 1012141618

(V)

V

CC

5.V

vs IOA

CC

V

= 3.5V

CTL

V

= 3.5V

CTL

RL = 10KΩ

RL = 10KΩ

900

850

800

750

700

(mA)

O

I

650

600

550

500

8 1012141618

Rev. 1.0.1

February. 2000.

V

6.V

CC

(V)

CC

V
RL = 10KΩ

vs IOB

= 3.5V

V

= 3.5V

CTL

CTL

RL = 10KΩ

Test Circuits

V

CC

I

CC

FAN8486D (KA3086D)

1

PVCC2

2

NC

SGND

VCTL

28

27

VCTL

SW24

1

A

2
3

FGOUT

2mA

1
2

10Ω(20W)

1
2
1

2

Ω

(20W)

10

1

2

NC

3

NC

4

SW1

SW2

SW3

SW4

OUT2P

5

6

PGND2

7

OUT2N

OUT1P

8

PGND1

9

OUT1N

10

NC

11 18

PVCC1 H2N

12 17

FGOUT

FGAMPOUT

F
A

N
8

4
8

FG(V25)

6
D

PG(V25)

PGAMPOUT

PGOUT

FGIN

VREG

PGIN

26

SW23

3
2

1

I

REG

SW13

SW15

SW17

1

2

1

2

1

2

1

=−20µA

2
1

2

~

~

1
2

H2N

SW22

25

24

23

22

21

20

19

2

1

SW19

SW21

SW18

SW25

SW10

500µA

FGAMPOUT

2

SW20

1

FG(V25)

PG(V25)

1

2

3

1

SW16

2

1

A

2
3

−

500µA

FGIN

PGOUT

2mA

−

500µA

−

500µA

VREG

SW14

1

2

PGIN

PGAMPOUT

H1P

SW7

+

−

SW8

~

H1N

1

SW5

2

2

SW6

1

SVCC H2P

13 16

H1P H1N

14 15

SW9

1

2

Rev. 1.0.1

February. 2000.

SW12

SW11

H2P

−

+

~

13

FAN8486D (KA3086D)

Typical Application Circuits

1

PVCC2

2

NC

NC

3

NC

4

OUT2P

5

SGND

VCTL

FGOUT

FGAMPOUT

F
A

FGIN

28

27

26

25

24

N

6

PGND2

8

FG(V25)

4

23

8

7

OUT2N

M

OUT1P

8

PGND1

9

6

VREG

D

PG(V25)

PGIN

22

21

PG

20

OUT1N

10

NC

11 18

PVCC1 H2N

12 17

SVCC H2P

13 16

H1P H1N

14 15

PGAMPOUT

PGOUT

19

V

REG

HALL

HALL

14

Rev. 1.0.1

February. 2000.

FAN8486D (KA3086D)

Rev. 1.0.1

February. 2000.

15

FAN8486D (KA3086D)

DISCLAIMER

FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURT HER NOTICE TO ANY
PRODUCTS HEREI N TO IMPROVE RELIABILITY, FUNCTIO N OR DESIGN. FAIRCH IL D DOES NOT ASSUME ANY
LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER
DOES IT CONVEY ANY LICENSE UNDER IT S PATENT RIGHTS, NOR THE RIGHTS OF OTHE RS.

LIFE SUPPORT POL I CY

FAIRCHILD’S PR ODUCTS ARE NOT AUTH ORIZED FOR USE AS C RITICAL COMPONENT S IN LIFE SUPPORT DE VICES
OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR
INTERNATIONAL. As used herein:

1. Life support devices or systems are devices or systems
which, (a) are intended for surgical implant into the body,
or (b) support or sustain life, and (c) whose failure to
perform when properly used in accordance with

2. A critical component in any component of a life support
device or sy stem whose fai lure to perform can be
reasonably expec ted to cause the failur e of the life support
device or system, or to affect its safety or effec t iv ene ss .

instructions for use provided in the labeling, can be
reasonably expected to result in a significant injury of the
user.

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 2000 Fairchild Semiconductor International

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