Datasheet AN8480NSB Datasheet (Panasonic)

ICs for Compact Disc/CD-ROM Player

AN8480NSB

3-phase full-wave motor driver IC

■ Overview

The AN8480NSB is a 3-phase full-wave motor
driver IC with a reverse rotation brake/short brake
changeover function, incorporating a thermal pro­tection circuit with its protection monitor pin.

■ Features

• 3-phase full-wave and snubberless

• FG output

• Current limit

• Reverse rotation prevention

• Thermal protection circuit built-in (with thermal

protection monitor pin)

■ Applications

• Various types of optical disk drive

■ Block Diagram

SG

15

2

H1+

3

H1−
H2+
H2−
H3+
H3−

VH

EC

ECR

5

6

8

9
7

18

17

Hall

amp.

matrix

Hall
bias

10

S/S

Detection

EA

Start/stop

16

CC

V

Direction
detection

ER

Logic

EP = ER × ΕΑ

Absolute

value

Direction

changeover

20

PCI

28 22 21

17 814

(1.2)

Upper side

distribution

Lower side
distribution

VTL

Thermal

protection

circuit

0.8

Amp.

Amp.

18.4±0.2
(5.15)

(4.8)

(6.4)

HSOP042-P-0400

+0.10

0.35

–0.05

Seating plane

Brake

circuit

13

BRK

Unit: mm

15

(1.315)

–0.05

+0.10

8.3±0.22.7±0.20.1±0.1

10.93±0.30

0.30

FG

comparator

0° to 10°

0.65±0.20

21

VM

22

CS1

28

A1

27

A2

26

A3

1

PG

12

FG

11

TSDF

1

AN8480NSB ICs for Compact Disc/CD-ROM Player

■ Pin Descriptions

Pin No. Symbol Description

1 PG Power GND pin
2H1+ Hall element-1 positive input pin
3H1− Hall element-1 negative input pin
4 N.C. N.C.
5H2+ Hall element-2 positive input pin
6H2− Hall element-2 negative input pin
7 VH Hall bias pin
8H3+ Hall element-3 positive input pin
9H3− Hall element-3 negative input pin

10 SS Start/stop changeover pin
11 TFLG Thermal protection monitor pin
12 FG FG signal output pin
13 BRK Brake mode setting pin
14 N.C. N.C.

Pin No. Symbol Description

15 SG Signal GND pin
16 V

Supply voltage pin

CC

17 ECR Torque command reference input pin
18 EC Torque command input pin
19 N.C. N.C.
20 PCI

Current feedback phase compensation pin
21 VM Motor supply voltage pin
22 CS Current det. pin 1
23 N.C. N.C.
24 N.C. N.C.
25 N.C. N.C.
26 A3 Drive output 3
27 A2 Drive output 2
28 A1 Drive output 1

■ Absolute Maximum Ratings

Parameter Symbol Rating Unit

Supply voltage V

4

Control signal input voltage

*

Supply current I

3

Output current

*

Hall bias current I

2

Power dissipation
Operating ambient temperature
Storage temperature

Note) Do not apply external currents or voltages to any pins not specifically mentioned.

For circuit currents, '+' denotes current flowing into the IC, and '−' denotes current flowing out of the IC.

1: Except for the operating ambient temperature and storage temperature, all ratings are for Ta = 25°C.

*

2: For 70°C and IC alone.

*

3: n = 1, 22, 26, 27, 28

*

4: n = 2, 3, 5, 6, 8, 9, 10, 13, 17, 18

*

*

1

*

1

*

V

V

I

T
T

CC

O(n)

HB

P

CC

M

(n)

D

opr

stg

7.0 V

14.4

0 to V

CC

30 mA

±1 200 mA

50 mA

667 mW

−20 to +70 °C

−55 to +150 °C

■ Recommended Operating Range

Parameter Symbol Range Unit

Supply voltage V

CC

V

M

4.25 to 5.5 V

4.5 to 14

V

2

ICs for Compact Disc/CD-ROM Player AN8480NSB

■ Electrical Characteristics at Ta = 25°C

Parameter Symbol Conditions Min Typ Max Unit

Overall

Circuit current 1 I
Circuit current 2 I

Start/stop

Start voltage V

START

Stop voltage V

Medium voltage V

Hall bias

Hall bias voltage V

Hall amplifier

Input bias current I
In-phase input voltage range V
Minimum input level V

Torque command

In-phase input voltage range EC VCC = 5 V 0.5  3.9 V
Offset voltage EC
Dead zone EC
Input current EC
Input/output gain A

Output

High-level output saturation voltage V
Low-level output saturation voltage V
Torque limit current I

FG

FG output high-level FG
FG output low-level FG
In-phase input voltage range V

FG hysteresis width H

Brake cirrcuit

Short brake model level V
Reverse rotation brake mode level V
Short brake start level V
Short brake current I

VCC = 5 V in power save mode  00.1mA

CC1

VCC = 5 V, IO = 0 mA 1 8 16 mA

CC2

Voltage with which a circuit operates 2.7  V
at VCC = 5 V and L → H

Voltage with which a circuit becomes 0.7 V

STOP

off at VCC = 5 V and H → L
Voltage with which V

MED

becomes 1.55  1.75 V

PC1

low at VCC = 5 V and EC = 0 V

VCC = 5 V, IHB = 20 mA 0.7 1.2 1.6 V

HB

VCC = 5 V  15µA

BH

VCC = 5 V 1.5  4.0 V

HBR

VCC = 5 V 60 mV[p-p]

INH

VCC = 5 V −100 0 100 mV

OF

VCC = 5 V 25 75 125 mV

DZ

VCC = 5 V, EC = ECR = 1.65 V −5 −1 µA

IN

VCC = 5 V, RCS = 0.5 Ω 0.75 1.0 1.25 A/V

CS

VCC = 5 V, IO = −300 mA  0.9 1.6 V

OH

VCC = 5 V, IO = 300 mA  0.2 0.6 V

OL

VCC = 5 V, RCS = 0.5 Ω 400 500 600 mA

TL

VCC = 5 V, IFG = − 0.01 mA 3.0  V

H

VCC = 5 V, IFG = 0.01 mA 0.5 V

L

VCC = 5 V, 1.5  3.0 V

FGR

Input D-range at H2+, H2−
VCC = 5 V 1 10 20 mV

FG

V

SBR

RBR

SBRLVCC

SBR

= 5 V 1.0 V

CC

V

= 5 V 3 .5  V

CC

= 5 V, ECR = 1.65 V 1.65 1.74  V

V

= 5 V 12 35  mA

CC

CC

V

3

AN8480NSB ICs for Compact Disc/CD-ROM Player

■ Electrical Characteristics at Ta = 25°C (continued)

• Design reference data

Note) The characteristics listed below are theoretical values based on the IC design and are not guaranteed.

Parameter Symbol Conditions Min Typ Max Unit

Thermal protection

Thermal protection operating T

SDONVCC

temperature
Thermal protection hysteresis width ∆T

SD

Thermal protection flag

Level at thermal protection = on V
Level at thermal protection = off V

TSDONVCC

TSDOFFVCC

■ Usage Notes

Prevent this IC from being line-to-ground fault. (To be concrete, do not short-circuit any of A1 (pin 28), A2 (pin 27)

and A3 (pin 26) with VM pin (pin 21).)

■ Application Notes

• PD  Ta curves of HSOP042-P-0400

2.500

2.240

= 5 V, ∆EC = 100 mV  160 °C

VCC = 5 V, ∆EC = 100 mV  45 °C

= 5 V 0.5 V
= 5 V 3.0  V

P

 T

D

a

2.000

(W)

D

1.500

1.042

1.000

Power dissipation P

0.500

0.000

Independent IC
without a heat sink

= 119.9°C/W

R

th(j-a)

025

50 12575 100 150

Ambient temperature Ta (°C)

Mounted on standard board
(glass epoxy: 75 × 75 × t1.6 mm
R

= 55.8°C/W

th(j-a)

3

)

4

ICs for Compact Disc/CD-ROM Player AN8480NSB

■ Application Notes (continued)

• Phase conditions between Hall input and output current

Phase of Hall pin

H1+ H3+H2+

A

HML

B

HML

C

MLH

D

LMH

E

LMH

F

MLH

H1

H3

H2

H2H1

H3

ECR

EC

0

A3 A3A2 A1 A2 A1

Emit

Output current

Sink

ABCDE

F

• Power consumption calculation method

You can find a rough value of electric power to be consumed in the IC in the following method and the use of EXCEL

(computer soft ware) will enable you to put it on a graph.
Calculating formula:

1. Let an induced voltage generated in each phase as below:
(Reference to a motor center point)

E

= EO × sin (X) · · · (1) EA2 = EO × sin (X+120) · · · (2)

A1

E

= EO × sin (X+240) · · · (3) X: Phase angle

A3

2. Let a current flowing in each phase as below:

IA1 = IO × sin (X) · · · (4) IA2 = IO × sin (X+120) · · · (5)
I

= IO × sin (X+240) · · · (6)

A3

3. The voltages generated by a wire-wound resistance of a motor are:

= IA1 × R · · · (7) VR2 = IA2 × R · · · (8) VR3 = IA3 × R · · · (9)

V

R1

4. In each phase, add the voltage generated by an induced voltage and that by a wire-wound resistance.

' = (1) + (4) VA2' = (2) + (5) VA3' = (3) + (6)

V

A1

5. As the lowest voltage in each phase angle must be 0 V, you can get the voltage to be generated in each phase by
means of subtracting the lowest voltage from the voltage of the remaining two phases.

V

= VA1' − MIN (VA1', VA2', VA3') · · · (10)

A1

V

= VA2' − MIN (VA1', VA2', VA3') · · · (11)

A2

V

= VA3' − MIN (VA1', VA2', VA3') · · · (12)

A3

6. Subtract the supply voltage from each phase's voltage found in item 5 and then multiply it by each phase's current,
so that you can get the power consumption.

3

P = Σ (12 − VAn ) × I

n=1

An

0

0

5

AN8480NSB ICs for Compact Disc/CD-ROM Player

■ Application Notes (continued)

• Theory of thermal resistance

A chip temperature or the fin temperature can be understood in the same way as Ohm's Law.

T

j

R

j-c

R

f

R

c-a

T

a

Make sure that T

P

= Ta + P × (R

T

j

does not exceed 150°C.

j

: Chip temperature

T

j

T

: Ambient temperature

a

P : Electric power generated by IC
R

: Thermal resistance between a chip and a package

j-c

R

: Thermal resistance between a package and a surface of a heat sink or free air

c-a

R

: Thermal resistance between a package and surface of a heat sink

f

+ R

// Rf)

j-c

c-a

If it exceeds 150°C, you can suppress the rise of a chip temperature by adding a heat sink which is equivalent to

R

in the above figure.

f

Tj = Ta + P × (R

j-c

+ R

c-a

// Rf)

A package surface and the fin are available for a temperature measurement. But the fin part is recommendable for

measurement because a package surface measurement does not always promise you a consistent measuring result.

■ Application Circuit Example

FG

Low: TSD on

TSDF

High: TSD off

VM = 12 V

VM

21

CS1

22

A1

28

27

A2

A3

26

PG

1

FG

12

RCS = 0.5 Ω

H1+
H1−
H2+
H2−
H3+
H3−

VH

Servo

EC

torque
command

ECR

High: Start
Medium: FG is on.
Low: Stop

SG

15

2

3

5

Hall

amp.

6

matrix

8

9

7

18

17

Detection

Hall
bias

EA

10

S/S

Start/stop

16

CC

V

Direction

detection

ER

Logic

EP = ER × EA

Absolute

value

Direction

changeover

20

PCI

0.1 µF

Upper side

distribution

Lower side

distribution

VTL

protection

Thermal

circuit

Amp.

Amp.

Brake
circuit

13

BRK

Low: Short brake
High: Reverce rotation brake

comparator

11

FG signal

= 5 V

V

CC

6