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參數(shù)資料
| 型號： | BM5446EFV-E2 |
| 廠商： | Rohm Semiconductor |
| 文件頁數(shù)： | 6/11頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC AMP SPEAKER W/DSP HTSSOP-B54 |
| 標準包裝： | 1,500 |
| 類型： | D 類 |
| 輸出類型： | 2 通道（立體聲） |
| 在某負載時最大輸出功率 x 通道數(shù)量： | 10W x 2 @ 8 歐姆 |
| 電源電壓： | 10 V ~ 26 V |
| 特點： | 消除爆音，短路和熱保護 |
| 安裝類型： | 表面貼裝 |
| 供應商設備封裝： | * |
| 封裝/外殼： | 54-VSSOP（0.295"，7.50mm 寬） |
| 包裝： | * |
Technical Note
4/32
BM5446EFV
www.rohm.com
2010.05 - Rev.B
2010 ROHM Co., Ltd. All rights reserved.
●DSP Block Functional Overview
1) Main Signal line function
No.
Function
Specification
1
Pre-scalar
Lch / Rch synchronous control
+24 ~ -103dB (0.5dB step),-
∞dB
2
DC cut HPF
FC : 1Hz
3
Channel Mixer
Mixing of the sound of the left and right channel of the input digital signal to DSP is
set up.
4
P
2Volume
(Perfect Pure Volume)
There are some scenes when sound becomes large suddenly, like the
explosion-scene
in TV commercial or in an action movie. The “P2Volume” function controls volume
automatically and adjusts the output level.
It makes easy to hear small whisper voice, and is adjusted.
Attack time : 1ms ~ 40ms (8steps)
Recovery time : 0.25s ~ 10s (16 steps)
5
BASS
Peaking filter is used.
Lch / Rch Concurrent control
Soft transition function
Fc Select : Same as 7 Band Parametric
Equalizer
Gain Select : ±18dB (0.5dB step)
Q (Quality Factor) : Same as 7 Band
Parametric Equalizer
Low shelf filter is used.
Lch / Rch Concurrent control
Soft transition function
Fc Select : Same as 7 Band Parametric
Equalizer
Gain Select : ±18dB (0.5dB step)
Q (Quality Factor) : Same as 7 Band
Parametric Equalizer
6
MIDDLE
Peaking filter is used.
Lch / Rch Concurrent control
Soft transition function
Fc Select : Same as 7 Band Parametric Equalizer
Gain Select : ±18dB (0.5dB step)
Q (Quality Factor) : Same as 7 Band Parametric Equalizer
7
TREBLE
Peaking filter is used.
Lch / Rch Concurrent control
Soft transition function
Fc Select : Same as 7 Band Parametric
Equalizer
Gain Select : ±18dB (0.5dB step)
Q (Quality Factor) : Same as 7 Band
Parametric Equalizer
High shelf filter is used.
Lch / Rch Concurrent control
Soft transition function
Fc Select : Same as 7 Band Parametric
Equalizer
Gain Select : ±18dB (0.5dB step)
Q (Quality Factor) : Same as 7 Band
Parametric Equalizer
8
Scalar 1
Lch / Rch Concurrent control
+24 ~ -103dB (0.5dB step), -
∞dB
9
Pseudo Stereo
A stereo-feel sound is reproduced for a monophonic sound by signal processing.
3 steps : Pseudo Stereo OFF / Pseudo Stereo ON (Weak) / Pseudo Stereo ON
(Strong)
10
Matrix Surround 3D
Matrix Surround 3D of a wider sweet spot, and it also with little prolonged viewing
and listening with a feeling of fatigue.
The acoustic field which does not spoil a vocal feeling of the normal position is played
back.
Surround : ON / OFF function
Loop
: ON / OFF function
Surround gain select : 16 steps
11
P
2Bass
(Perfect Pure Bass)
Clear deep Bass with low distortion.
Lch / Rch Concurrent control
Soft transition function
Frequency select : 4 steps
Gain select : 0 ~ 15dB (1dB step)
12
P
2Treble
(Perfect Pure Treble)
Real, pure and crystal clear sound.
Lch / Rch Concurrent control
Soft transition function
Gain select : 0 ~ 15dB (1dB step)
13
Scalar 2
Lch / Rch Concurrent control
+24 ~ -103dB (0.5dB step), -
∞dB
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