Sanyo EP93F manual LA6548ND, LA6548NHNH

Page 17

Four-Channel Driver IC for CD Players/Decks

LA6548ND

Overview

The LA6548ND is a 4-channel driver for CD players/decks that features BTL amplifier circuits in all four channels.

Functions and Features

■Four power amplifier (BTL connection) circuits

■Iomax: 0.7 A

■Built-in level shifter circuits

■Built-in muting circuit mutes all outputs (This circuit operates for the BTL amplifier channels but does not affect the regulator circuit.)

■Built-in regulator (3.3 V output, requires an external pnp transistor)

■Thermal shutdown circuit

■Package: DIP30SDLF (400 mil)

Block Diagram

VCC1

1

 

 

 

 

 

30

VCC2

 

2

 

 

 

 

-

29

 

MUTE

 

Muting (output on/off)

 

15.4k

+

VREF

 

 

11k

15.4k

 

11k

 

 

 

 

 

 

 

 

VIN1

3

-

 

-

28

VIN4

 

 

 

 

 

+

 

+

 

 

 

VG1

4

 

 

 

 

 

27

VG4

VO1+

5

 

Level shifter

Level shifter

 

 

26

VO4+

VO1-

6

 

 

 

25

VO4-

GND

7

 

 

 

 

 

24

GND

GND

8

 

-

 

 

 

23

GND

 

 

 

+

 

 

 

 

 

GND

9

 

 

 

 

 

22

GND

VO2-

10

 

Level shifter

Level shifter

 

 

21

VO3-

VO2+

11

 

 

 

20

VO3+

VG2

12

 

15.4k

 

15.4k

 

19

VIN3G

 

 

11k

 

11k

 

 

VIN2

13

-

 

-

18

VIN3

 

 

 

 

 

 

+

 

+

 

 

 

REG-C

14

Collector connection for the

 

 

 

17

CD

 

 

 

 

 

 

 

 

 

external pnp transistor

 

RESET

 

 

 

REG-B

15

 

3.3V REG

 

 

16

RESET

Base connection for the

 

 

 

 

 

external pnp transistor

 

 

 

 

 

Four-ChannellDriverDriver ICIC forfor CDCD Players/DecksPlayers/Decks

LA6548NHNH

Overview

The LA6548NH is a 4-channel driver for CD players/decks that features BTL amplifier circuits in all four channels.

Functions and Features

■Four power amplifier (BTL connection) circuits

■Iomax: 0.7 A

■Built-in level shifter circuits

■Built-in muting circuit mutes all outputs (This circuit operates for the BTL amplifier channels but does not affect the regulator circuit.)

■Built-in regulator (3.3 V output, requires an external pnp transistor)

■Thermal shutdown circuit

■Package: HSOP28H (375 mil)

Block Diagram

VCC1

1

 

 

 

 

28

VCC2

 

2

 

 

 

-

27

 

MUTE

Muting (output on/off)

 

+

VREF

 

 

11k

15.4k

 

15.4k

 

 

 

 

 

11k

 

 

VIN1

3

 

 

26

VIN4

 

-

 

-

 

 

 

+

 

+

 

 

VG1

4

 

 

 

 

25

VG4

VO1+

5

 

Level shifter

Level shifter

 

24

VO4+

VO1-

6

 

 

23

VO4-

( NC )

7

 

 

 

 

22

( NC )

 

FR

GND

-

 

GND

FR

 

 

 

+

 

 

 

( NC )

8

 

 

 

 

21

( NC )

VO2-

9

 

Level shifter

Level shifter

 

20

VO3-

VO2+

10

 

 

19

VO3+

VG2

11

 

15.4k

 

15.4k

18

VG3

 

 

11k

 

 

 

 

12

-

 

11k

17

 

VIN2

 

 

-

VIN3

 

+

 

+

REG-C

13

Collector connection for the

 

 

16

CD

 

 

 

 

 

 

 

 

external pnp transistor

 

RESET

 

 

REG-B

14

 

3.3V REG

 

15

RESET

Base connection for the

 

 

 

 

external pnp transistor

 

 

 

 

 

29 Car Audio

30 Car Audio

 

 

 

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