|
|
 |
NSP-6241B
6ch Full digital audio amplifier
processor with built-in headphone
amplifier |
|
|
| |
Overview
|
|
NSP-6241B is a core DSP controller
IC especially designed for advanced multi-channel full
digital amplifier systems.
NSP-6241B includes essential preprocessor features like
full channel mixer, volume and tone control, dynamic range
compression and general purpose biquad filter blocks.
By combined use of built-in mixer and biquad filters,
additional processing like Dolby bass management, loudness
control and preset parametric equalizers can be implemented.
Neofidelity’s patient filed functional block called SFACS(Sampling
Frequency Adaptive Coefficient Scaling) and world-unique
floating point operation scheme eliminate audio performance
degradation problems in conventional digital amplifier
system.
It has two channels of auxiliary digital audio input and
two channels of auxiliary digital audio output interface.
It also provides high quality two channel amplified headphone
outputs that can directly drive headphone at power level
of 38mW. |
| |
|
Applications
|
|
Home theater AV product
DVD-Receiver
AV amplifier
Digital broadcast receiver with built-in amplifier
Car stereo and A/V product
Car stereo amplifier system
Car AV-Receiver
PC and game console amplifier system
Other digital multi-channel audio systems |
| |
|
Functional block diagram
|
|
 |
| |
|
Features
|
|
|
Input |
|
6 main channel and 2 AUX channel I²S input
-
32kHz~192kHz input fs support
-
Optional 2 channel SPDIF interface
Micom controlled thru I²C or stand-alone operation mode
|
|
|
Output |
|
6 channel PWM output
2 channel I²S/SPDIF AUX output
- Two channel downmix REC out
- Any other two channel pair for future processing
2 channel headphone drive out
- 38mW @16ohm, THD+N<0.03% @1kHz |
|
|
Pre-processing |
|
Floating point operation
Sampling rate conversion
8x8 channel mixer
Tone control
4 biquads filter chain per channel
- Bass management
- Programmable parametric EQ
- Loudness control
- Subwoofer LPF, etc.
Two stage volume control +48 ~ -∞ dB range
Advanced auto mute control
Dynamic range compression
8x oversampler |
|
|
PWM conversion |
|
PWM-mask control for power stage control
Supports bridge mode
PWM output channel mapping |
|
|
64 pin TQFP package |
|
|
2.5V core, 3.3V I/O power supply |
| |
 |
| |
