![](/images/new-backgrounds/1179633/17963349x1.webp)
Electronic Volume and Tone Control IC for Car Audio Systems
LC75411E/W ![](/images/new-backgrounds/1179633/17963349xi2.webp)
![](/images/new-backgrounds/1179633/17963349xi3.webp)
![](/images/new-backgrounds/1179633/17963349xi4.webp)
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 ![](/images/new-backgrounds/1179633/17963349xi5.webp)
![](/images/new-backgrounds/1179633/17963349xi6.webp)
![](/images/new-backgrounds/1179633/17963349xi7.webp)
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
■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
■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
Features
Functions
■Volume control: A total of 81 positions from 0 dB to
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
■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
Features
■
■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
■
■
■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
■
■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
■
■
■All functions are controlled using serial data (CCB)
■Packages: LC75412E: QIP64E (14 14 mm)
LC75412W: SQFP64 (10 10 mm)
Block Diagram
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| 4.7k | Ω | 0.1 | ∝ |
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| [BASS fo | 100Hz] |
| [TREBLE] |
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| 0.33∝F |
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| [BASS fo | 100Hz] |
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| [TREBLE fo | 10kHz] | ||||
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| 220pF | 68kΩ |
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| 1000pF | 10kΩ | 1kΩ |
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| LSELO | LVRIN |
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| 0.1∝F | LF1C1 | LF1C2 | LF1C3 |
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| 0.001 | LF3C1 | LF3C2 | LF3C3 | |
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| LCT | NC | NC | NC | NC | NC | NC | |||||||||||||||||||
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| LFIN |
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1∝F | - |
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L4 |
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LTOUT 33
LVref
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32 | LFOUT | 10∝F | ||||
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31 | LROUT | + |
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| TEST |
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28 |
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1∝F + | L2 |
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| 1 F + | L1 | 54 |
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1∝F + | L1 |
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| Multiplexer |
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| CL | CL |
| 1∝F + | L6 | 55 |
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V | DD | + | LVref |
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| DI | Micro | VDD |
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| CONTROL |
| LOGIC CIRCUIT |
| INTERFACE |
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| Controller | Vref | 56 |
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22∝F + | Vref |
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| Multiplexer |
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| R6 | 58 |
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| 1∝F + | R1 |
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| TIMER |
| TIM |
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| + | R3 | RVref |
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| - | RROUT | 0.033∝F | 1∝F | + | R2 | 60 |
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| RFOUT | 10∝F | 61 |
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| 1∝F + | R5M | 63 |
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| 1∝F | + | R5P |
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| 1 | 2 | 3 |
| 4 | 5 | 6 | 7 | 8 |
| 9 | 10 | 11 | 12 | 13 | 14 |
| 15 |
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| RSELO | RVRIN | RCT | RCOM | RVROUT | RTIN | RF1C1 | RF1C2 | RF1C3 | RF3C1 | RTOUT | 10∝F |
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| RSELO |
| RVRIN | RCT | NC | NC | NC |
| RF1C1 | RF1C2 | RF1C3 | NC | NC | NC |
| RF3C1 | RF3C2 | RF3C3 |
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| 1∝F | + |
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| 1∝F | + |
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| 0.1∝F |
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| 0.001∝F |
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| + | 10∝F | 0.1∝F | 0.1∝F | 2700pF |
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| 220pF |
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| 1000pF |
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| 68kΩ | 4.7kΩ | 0.1∝F |
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| [TREBLE] |
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| 10kΩ | 1kΩ | 0.33∝F |
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| [BASS fo | 100Hz] |
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| [TREBLE fo | 10kHz] | ||||||||||||
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RVref
16 RTOUT
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| 27 | DVSS |
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| 26 | CL | CL |
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CCB |
| 25 | DI | DI | Micro |
INTERFACE |
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| Controller | ||
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| 24 | CE | CE |
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| 23 | MUTE |
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47kΩ |
| 22 | RAVSS |
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NO SIGNAL | 1MΩ | 21 | NC |
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TIMER |
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| 20 | TIM |
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| 0.033∝F | ||
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| RROUT | ||
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| 19 |
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| + | PA | ||
+ |
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| RFOUT | 10∝F | |
- |
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| 18 |
| PA | ||
+ |
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| RFIN | 10∝F | |
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| 17 |
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10∝F |
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+ |
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| 45 Car Audio | 46 Car Audio |
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