Sanyo EP93F manual LA2901VV

Car Audio Electronic Volume Control IC with BBE Surround Processor

LA2657M	Product	❋ : Use of conditional products requires
		consultation with a SANYO representative
	Conditional
		prior to the use of the device.

Overview

Four Channel HighHigh--OutputOutputLineLine AmplifierAmplifier for Car Audio

LA2901VV

Overview

The LA2657M is an audio signal processor for car audio that integrates the functions of the LC75421 IC and a BBE surround processing on a single chip. The LA2657M's main functions include input functions, input gain adjustment, tone controls, super bass function, balance control, volume fader control, and the BBE surround processor.

R

BBE and BBE symbol are registered trademarks of BBE Sound, Inc.

Functions

■Input functions: Four input systems (L+R) (The LC75421 provides five input systems.)

■Input gain control (0 to 18.75 dB in 1.25 dB steps)

■BBE processor

■Tone controls (Bass: ±11.9 dB, treble: ±11.9 dB. Both in 1.7 dB steps)

■Super bass (0 to 20 dB in 2 dB steps)

■Master volume control (0 dB to -79 dB in 1 dB steps, -∞)

■Bus control

■Fader (0 to -20 dB in 2 dB steps, -20 to -25 dB in 5 dB steps, -25 to -45 dB in 10 dB steps, -60 dB, -∞)

■CCB bus (On/off control of the BEE function is not provided over the CCB bus.)

■Package: QIP64E (14 14 mm)

❋:This product is subject to change without notice for improvement. When considering the use of this product, first refer to the latest SANYO "Semiconductor News" publication related to this device and finally refer to the latest specifications for the device.

Block Diagram

The LA2901V is a 4-channel high-output line amplifier designed for car audio applications.

Since the output voltage is increased significantly over conventional line amplifiers, the LA2901V achieves a high signal-to-noise ratio and high audio quality in the connection from the main unit to the external amplifier and can improve power amplifier performance.

The LA2901V also provides significant space savings over earlier solution but reducing by one half the number of capacitors previously required to boost the signal system supply voltage and by adopting the SSOP miniature package.

Functions and Features

■High output level (5.3 V rms)

■Low output noise voltage (12 ∝V)

■Low total harmonic distortion (0.004 %)

■High ripple rejection ratio (70 dB)

■Minimal number of external components required

■Superb audio quality

■Package: SSOP24 (275 mil)

Block Diagram

BBE BBE

PA

PA

VCC

NC

+

NC

+ +

CE

DI

CL

LF-OUT

LR-OUT

100µ

F

9.0V

100µ

F

+

10µ F

+

RF-OUT

RR-OUT

64

63

62

61

60

59

58

57

56

55

54

53

52

51

50

49

10kΩ

10kΩ

+

10kΩ

10kΩ

22µ F

+

22µ F

+

1.5NF

1.5NF

22µ F

22µ F

+

+

1

CCB

48 NC

+

TONE

FADER

+

EVR

INTERFACE

VDD

2

F.

S-BASS

47

+

24

23

22

21

20

19

18

17

16

15

14

13

+

3

SW

46

PA

FADER

+

4

45 +

PA

SIGNAL

AMP

SIGNAL

AMP

LIFT AMP

LIFT AMP

SIGNAL AMP

SIGNAL AMP

+

5

Vreg

44

F.SW

+

6

43

CC

CC

+

--

Ω

Ω

--

+

CC

CC

--

+

--

+

+

--

+

--

+

7

42

V

V

36k

36k

V

V

F.

+

8

SW

41

Ω

Ω

Ω

Ω

Ω

Ω

+

9

BBE

40

30k

30k

12k

12k

30k

30k

NC 10

39 NC

X

X

--

+

-- +

-- +

+ --

+ --

+ --

BBE

11

38

REF

REF

REF

REF

REF

REF

BBE

12

EVR

37

Ω

Ω

36k

36k

V

V

V

V

V

V

36kΩ

36kΩ

+

13

36

EVR

14

TONE

BBE

35

EVR

1

2

3

4

5

6

7

8

9

10

11

12

24kΩ

S-BASS

R

NC 15

SW

34

L

-

-

V ef

BBE

DC

DC

24kΩ

16

33 NC

24kΩ

+

+

+

+

22µ F

F

Ripple

+

22µ F

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

22µ

47µ

F

22µ F

24kΩ

Filter

NC

+

VCC

NC

NC

LF-IN

LR-IN

RF-IN

RR-IN

BBE

F.SW

We recommend the use of 1% tolerance or better resistors

on/off

for the 24 kΩ

and 36 kΩ

feedback resistors.

39 Car Audio 40 Car Audio