Sanyo EP93F manual LC75411E/W, LC75412E/W2E/W

❋ :CCB is SANYO's original bus format. All bus addresses are managed by SANYO for this format.

Electronic Volume and Tone Control IC for Car Audio Systems

LC75411E/W

Overview

The LC75411E/W is an electronic volume and tone control IC that implements a rich set of audio control functions with a minimal number of external components. Functions include volume, balance, fader, bass/treble, and loudness controls, as well as input selection/switching functions and an input gain control.

Electronic Volumeume andand ToneTone ControlControl ICIC forfor Car Audio Systemsems

LC75412E/W2E/W

Overview

The LC75412E/W is an electronic volume and tone control IC that implements a rich set of audio control functions with a minimal number of external components. Functions include volume, balance, fader, bass/treble, and loudness controls, as well as input selection/switching functions and an input gain control.

Functions

■Volume control: A total of 161 positions from 0 dB to -79.5 dB in 0.5 dB steps and -∞dB. A balance function can be implemented by controlling the left and right channel volume controls separately.

■Fader control: The rear or front outputs can be attenuated by one of 16 levels

(A total of 16 settings with attenuations of 0 to -2 dB in 1 dB steps, -2 to -20 dB in 2 dB steps, -20 to -30 dB in 10 dB steps, and -45, -60, and -∞dB settings.)

■Bass/treble controls: Each band can be controlled in 1 dB steps from 0 dB to ±6 dB, and in 2 dB steps from ±8 dB to ±12 dB

■Input gain control: The input signal can be amplified by 0 to +18.75 dB in 1.25 dB steps

■Input switching: One of 4 input systems (left and right channels) can be selected

■Loudness control: The -32 dB position of the 2 dB step volume control ladder resistor can be tapped and a loudness function implemented with external capacitor and resistor components

Features

Functions

■Volume control: A total of 81 positions from 0 dB to -79 dB in 1 dB steps and -∞dB.

A balance function can be implemented by controlling the left and right channel volume controls separately.

■Fader control: The rear or front outputs can be attenuated by one of 16 levels

(A total of 16 settings with attenuations of 0 to -2 dB in 1 dB steps, -2 to -20 dB in 2 dB steps, -20 to -30 dB in 10 dB steps, and -45, -60, and -∞dB settings.)

■Bass/treble controls: Each band can be controlled in 2 dB steps from 0 dB to ±18 dB

■Input gain control: The input signal can be amplified by 0 to +18.75 dB in 1.25 dB steps

■Input switching: One of six input systems (left and right channels) can be selected (Five of the input systems are single- ended inputs, one uses differential inputs.)

■Loudness control: Taps are output starting at the -32 dB position of the ladder resistor and a loudness function implemented with external capacitor and resistor components

Features

■On-chip buffer amplifiers reduce the number of external components

■Internal switches are implemented in a silicon gate CMOS process that minimizes the noise generated when switching. This results in low noise even when switching in the no-signal state

■Zero-cross switching circuits used for low noise even when input signals are present

■Built-in VDD/2 reference voltage generation circuit

■All functions are controlled using serial data (CCB)

■Packages: LC75411E: QIP44M (10 10 mm)

LC75411W: SQFP48 (7 7 mm)

❋ :CCB is SANYO's original bus format. All bus addresses are managed by SANYO for this format.

Block Diagram

■On-chip buffer amplifiers reduce the number of external components

■Internal switches are implemented in a silicon gate CMOS process that minimizes the noise generated when switching. This results in low noise even when switching in the no-signal state

■Zero-cross switching circuits used for low noise even when input signals are present

■Built-in VDD/2 reference voltage generation circuit

■All functions are controlled using serial data (CCB)

■Packages: LC75412E: QIP64E (14 14 mm)

LC75412W: SQFP64 (10 10 mm)

Block Diagram

4.7k

Ω

0.1

∝

[BASS fo

100Hz]

[TREBLE]

0.33∝F

[BASS fo

100Hz]

[TREBLE fo

10kHz]

F

220pF

68kΩ

1000pF

10kΩ

1kΩ

∝F

0.001∝F

10∝F

0.1∝F

0.1∝F

0.1∝F

2700pF

1∝F

+

10∝F

1∝F

+

+

+

+

LSELO

LVROUT

LF1C1

LF1C2

LTOUT

10∝F

LSELO

LVRIN

0.1∝F

LF1C1

LF1C2

LF1C3

0.001

LF3C1

LF3C2

LF3C3

LVRIN

LCOM

LF1C3

LF3C1

LCT

LTIN

LCT

NC

NC

NC

NC

NC

NC

48

47

46

45

44

43

42

41

40

39

38

37

36

35

34

-

1∝F +

L5P

+

49

1∝F +

L5M

LFIN

50

1∝F +

L4

-

-

-

+

10∝F

51

-+

+

+

+

+

LFOUT

1∝F

-

+

1∝F

L3

-

LVref

L4

LVref

-

-

LVref

PA

+

+

+

-

+

+

+

+

52

LVref

-

1∝F

L3

-

+

LROUT

1∝F +

L2

+

PA

+

-

53

10∝F

LTOUT 33

LVref

+

10∝F

+

-

+

-

	LFIN
32	LFOUT	10∝F
31	LROUT	+	PA
30		+	PA
	LAVSS	10∝F
29
	TEST
28

LVref

VSS

∝

LVref

1∝F +

L2

1 F +

L1

54

1∝F +

L1

Multiplexer

ZERO-CROSS DET

CL

CL

1∝F +

L6

55

Multiplexer

ZERO-CROSS DET

+

CCB

DI

LVref

V

DD

+

LVref

DI

Micro

VDD

-

-

CONTROL

LOGIC CIRCUIT

INTERFACE

Controller

Vref

56

+

CONTROL

LOGIC CIRCUIT

22∝F +

Vref

CIRCUIT

CE

22∝F +

RVref

CIRCUIT

CE

-

+

RVref

57

-

VDD

1∝F +

+

R1

Multiplexer

ZERO-CROSS DET

TEST

R6

58

Multiplexer

ZERO-CROSS DET

NO SIGNAL

+

R2

1∝F +

R1

TIMER

TIM

59

RVref

+

R3

RVref

-

RROUT

0.033∝F

1∝F

+

R2

60

PA

R4

+

+

1∝F +

R3

RVref

+

-

+

RFOUT

10∝F

61

-

+

+

RVref

-

+

RVref

-

-

+

PA

1∝F +

R4

RVref

-

+

10∝F

-+

+

+

+

+

RFIN

62

-

-

-

-

1∝F +

R5M

63

+

1∝F

+

R5P

-

64

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

RSELO

RVRIN

RCT

RCOM

RVROUT

RTIN

RF1C1

RF1C2

RF1C3

RF3C1

RTOUT

10∝F

RSELO

RVRIN

RCT

NC

NC

NC

RF1C1

RF1C2

RF1C3

NC

NC

NC

RF3C1

RF3C2

RF3C3

+

1∝F

+

+

1∝F

+

0.1∝F

0.1∝F

0.001∝F

0.001∝F

+

10∝F

0.1∝F

0.1∝F

2700pF

220pF

10∝F

1000pF

68kΩ

4.7kΩ

0.1∝F

[BASS fo

100Hz]

[TREBLE]

10kΩ

1kΩ

0.33∝F

[BASS fo

100Hz]

[TREBLE fo

10kHz]

RVref

16 RTOUT

		27	DVSS
		26	CL	CL
CCB		25	DI	DI	Micro
INTERFACE					Controller
		24	CE	CE
		23	MUTE
47kΩ		22	RAVSS
NO SIGNAL	1MΩ	21	NC
TIMER
		20	TIM
				0.033∝F
			RROUT
-		19
				+	PA
+
			RFOUT	10∝F
-				+
		18			PA
+
			RFIN	10∝F
		17
10∝F
+

45 Car Audio 46 Car Audio