Panasonic AN8787NSB Datasheet

ICs for Compact Disc/CD-ROM Player

AN8787NSB

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

■ Overview

The AN8787NSB is a 4-channel driver IC that
has 2-channel of H-bridge method actuator driver
with current feedback, one channel of BTL type
traverse driver and one channel of tri-state output
type loading driver. It is optimum for actuator or
motor driver of CD/CD-ROM player. It comes with
a surface mount package that excels in heat radiat­ing characteristic.

■ Features

• Little phase delay due to current feedback method

(2-channel for actuator)

• Channels for loading motor (H-bridge system) are

available for three modes of forward rotation, re­verse rotation and braking

• Muting SW with 2 modes: A loading channel is in

operation, and the other 3 channels are in muting;
Loading is in muting and the other 3 channels are
in operation.

• Standby switch to stop all functions

• Wide output dynamic range is available regard-

less of a reference power source on the system.

• I/O gain setting by an external resistor

• 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

• DVD/DVD-ROM drive

1

AN8787NSB ICs for Compact Disc/CD-ROM Player

■ Block Diagram

D1−

20

D1+

18

17

D2−

D2+

PVC2

15

16

PVC5

7

14

D3+

12

D3−

PVC3

13

D4+

S3

4

10

PVC4

D4−

8

S4

9

5

PVC1

21

IN1

BTL linear

driver

ch. 2

Control

logic

Comp.

24

25

AS

ch. 2

IN2

PGND1

SV

CC

19

27

Fin

1

PV

CC

2

Reset
SV

CC

Thermal

protect

SV

CC

monitor

V

REF

monitor

Standby

26

STB

ch. 1

Direction

det.

current

amp.

23

■ Pin Descriptions

Pin No. Description

1 Driver-3 phase compensation pin
2 Driver-3 input pin
3 Driver-4 input pin
4 Driver-3 feedback pin
5 Driver-4 feedback pin
6 Driver-4 phase compensation pin
7 Driver-3, driver-4 power supply pin
8 Driver-4 reverse rotation output pin

9 Driver-4 current feedback power supply 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

BTL linear

driver

ch. 3

ch. 3 ch. 4

Absolute

V-I

direction

det.

2

IN3

BTL linear

driver

ch. 4

Absolute

V-I

direction

det.

3

IN4

28

PC

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 Standby input pin
27 System power supply pin
28 PC (power cut) input pin

Fin GND pin

11

22

6

1

PGND2

V

REF

2

ICs for Compact Disc/CD-ROM Player AN8787NSB

■ 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 power dissipation, 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 = 582 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

Note)*: Refer to "■ Application Circuit Example".

*

SV

CC

PVC1 , PVC2 , PV

C5

14.4 V

 mA

582 mW

−30 to +85 °C

−55 to +150 °C

6.4 to 14 V

4.5 to 14

■ Electrical Characteristics at SVCC = V

CC1

= V

= 12 V, V

CC2

Ta = 25°C

Parameter Symbol Conditions Min Typ Max Unit

Current consumption 1 with no I

SVCCVPC

signal
Current consumption 2 with no I

VCC1VPC

signal
Current consumption 3 with no I

VCC2VPC

signal
Current consumption 4 with no I

VCC3VPC

signal
Current consumption with no I

SVCC-SVPC

signal at standby 1
Current consumption with no I

VCC1-SVPC

signal at standby 2

Driver 1

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

OOF-1

1+

1−

L1+

L1−

= 5 V, V

= 5 V, V

= 0 V, V

= 5 V, V

= 5 V, V

= 5 V, V

STB

STB

STB

STB

STB

STB

= 5 V, RL = 8 Ω, VPC = 5 V, V

CC3

STB

= 5 V,

= 5 V  13 30 mA

= 5 V  46mA

= 5 V  14mA

= 5 V  14mA

= 0 V  36mA

= 0 V  13mA

−30 0 30 mV

18.5 21.0 23.5 dB

−2.8 0 2.8 dB

6.5 8.0  V
−8.0 −6.5 V

3