Panasonic AN8480NSB Datasheet

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