Panasonic AN8783SB Datasheet

ICs for Compact Disc/CD-ROM Player

AN8783SB

4-channel linear driver IC for CD/CD-ROM drive

■ Overview

The AN8783SB employs one channel of power
op-amp. system and three channels of H-bridge
system. Two channels out of three channels of H­bridge method are a current feedback system. So
this IC is optimum for driving an actuator and a
motor of CD/CD-ROM drive. It comes with a
surface mount package which excels in a heat ra­diation characteristic.

■ Features

• Little phase delay due to current feedback system

(2-channel for actuator)

• 4 modes of forward, reverse rotations, braking and

standby can be selected from channels for load­ing motor (H-bridge method) by a digital signal
from a microcomputer.

• Wide output dynamic range regardless of refer-

ence voltage of the system

• Setting the input level of a driver by an external

resistor is possible.

• PC (power cut) function built-in (common for ch.

1, ch. 3 and ch. 4)

• Thermal shut-down circuit built-in (with hyster-

esis)

18.4±0.2
(5.15)

28 22 21

17 814

(1.2)

(4.8)

(6.4)

0.8

15

8.3±0.22.7±0.20.1±0.1

+0.10

0.35

–0.05

Seating plane

HSOP042-P-0400

+0.10

10.93±0.30

Unit: mm

(1.315)

–0.05

0.30

0° to 10°

0.65±0.20

■ Applications

• CD/CD-ROM drive

1

AN8783SB ICs for Compact Disc/CD-ROM Player

■ Block Diagram

PGND1

19

28

Fin

21

1/2 PV

Reset

SV

Thermal

protect

SV

monitor

V

monitor

PVC1

CC

CC

REF

CC

27

D1+

20

18

ch. 1 ch. 2

Direction

det.

current

amp.

N.C.

IN1

D1−

D2−

17

BTL linear
driver ch. 2

Control

252324

AS

■ Pin Descriptions

Pin No. Description

1 PC1 (power cut) input pin
2 Driver-3 phase compensation pin
3 Driver-3 input pin
4 Driver-4 input pin
5 Driver-3 feedback pin
6 Driver-4 feedback pin
7 Driver-4 phase compensation pin
8 Driver-4 current feedback power supply pin

9 Driver-4 reverse rotation output pin
10 Driver-4 forward rotation output pin
11 Driver-2, driver-4 GND pin
12 Driver-3 reverse rotation output pin
13 Driver-3 current feedback power supply pin
14 Driver-3 forward rotation output pin
15 Driver-2 forward rotation output pin

logic

IN2

D2+

15

Comp.

D3+

16

26

PC2

PVC2

BTL linear
driver ch. 3

Absolute

direction

14

V-l

det.

3

IN3

D3−

12

ch. 3

PVC3

13

5

Absolute
direction

D4+

10

BTL linear
driver ch. 4

V-l

det.

4

Pin No. Description

16 Driver-2 power supply pin
17 Driver-2 reverse rotation output pin
18 Driver-1 reverse rotation output pin
19 Driver-1 GND pin
20 Driver-1 forward rotation output pin
21 Driver-1 power supply pin
22 V

input pin

REF

23 Driver-1 input pin
24 Driver-2 input pin
25 Driver-2 output voltage adjustment pin
26 PC2 (power cut) input pin
27 N.C.
28 Power supply pin

Fin GND pin

9

ch. 4

IN4

D4−

PVC4S3S4

8

1

PC1

6

11

PGND2

7

2

22

V

REF

2

ICs for Compact Disc/CD-ROM Player AN8783SB

■ Absolute Maximum Ratings

Parameter Symbol Rating Unit

Supply voltage SV
Supply current I

2

Power dissipation
Operating ambient temperature
Storage temperature

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

2: Referring to "■ Application Circuit Example", use within the range of PD = 542 mW or less at Ta = 85°C, following the

*

allowable power dissipation characteristic curve of "■ Application Notes".

*

1

*

1

*

CC

CC

P

D

T

opr

T

stg

■ Recommended Operating Range

Parameter Symbol Range Unit

Supply voltage SV

CC

PVC1 , PV

C2

14.4 V

 mA

542 mW

−30 to +85 °C

−55 to +150 °C

6.4 to 14 V

4.5 to 14

■ Electrical Characteristics at SVCC = 12 V, V

= 12 V, V

CC1

Ta = 25°C

Parameter Symbol Conditions Min Typ Max Unit

= I

= I

Current consumption 1 with no I

SVCCIIN1

IN3

signal
Current consumption 2 with no I

VCC1IIN1

= I

IN3

signal
Current consumption 3 with no I

VCC2IIN1

= I

IN3

signal

Driver 1

Output offset voltage V
Gain (+)G
Relative gain (+/−) ∆G
Limit voltage (+)V
Limit voltage (−)V

OOF-1

1+

1−

L1+

L1−

Driver 2

Output voltage 1 (+)V

21+VPC1

= 5 V, V

RAS = 10 kΩ

Output voltage 1 (−)V

21−VPC1

= 5 V, V

RAS = 10 kΩ

Output voltage 2 (+)V

22+VPC1

= 5 V, V

RAS = 0 kΩ

Output voltage 2 (−)V

22−VPC1

= 5 V, V

RAS = 0 kΩ

= 0 µA  15 30 mA

IN4

= I

= 0 µA  46mA

IN4

= I

= 0 µA  14mA

IN4

PC2

PC2

PC2

PC2

CC2

= 0 V, V

= 0 V, V

= 0 V, V

= 0 V, V

= 5 V, RL = 8 Ω, V

= 0 V, V

PC1

PC2

−30 0 30 mV

18.5 21.0 23.5 dB

−3.0 0 3.0 dB

6.5 8.0  V
−8.0 −6.5 V

= 1 V, 2.4 2.7 3.0 V

IN2

= 4 V, −3.0 −2.7 −2.4 V

IN2

= 1 V, 3.4 4.0  V

IN2

= 4 V, −4.0 −3.4 V

IN2

= 5 V,

3