参数资料
| 型号： | BM5446EFV-E2 |
| 厂商： | Rohm Semiconductor |
| 文件页数： | 7/11页 |
| 文件大小： | 0K |
| 描述： | IC AMP SPEAKER W/DSP HTSSOP-B54 |
| 标准包装： | 1,500 |
| 类型： | D 类 |
| 输出类型： | 2 通道（立体声） |
| 在某负载时最大输出功率 x 通道数量： | 10W x 2 @ 8 欧姆 |
| 电源电压： | 10 V ~ 26 V |
| 特点： | 消除爆音，短路和热保护 |
| 安装类型： | 表面贴装 |
| 供应商设备封装： | * |
| 封装/外壳： | 54-VSSOP（0.295"，7.50mm 宽） |
| 包装： | * |
Technical Note
5/32
BM5446EFV
www.rohm.com
2010.05 - Rev.B
2010 ROHM Co., Ltd. All rights reserved.
Pre
Scalar
Surround
EVR
＆
Balance
Post
Scalar
&
Clipper
Digital Audio Processing Signal Flow
Channel
Mixer
BASS
MIDDLE
TREBLE
7 Band
Parametric
Equalizer
EVR
＆
Balance
DC Cut
HPF
Scalar
2
Scalar
1
3 Band
Parametric
Equalizer
LPF
Channel
Mixer
Post
Scalar
&
Clipper
SEL1
SEL2
S/PDIF
OUTPUT
ANALOG
OUTPUT
SEL3
SDATAO2
SDATAO1
SDATA1
SDATA2
DAC
SPEAKER
OUTPUT
No.
Function
Specification
14
7-Band
Parametric Equalizer
Peaking filter is used. (Possible to set the 5 coefficients directly for b0,b1,b2,a1,a2)
Lch / Rch Concurrent control
Fc select : Setup of 61 divisions (20Hz ~ 20kHz) is possible.
Gain select : ±18dB ( 0.5dB step )
Q(Quality Factor) : 0.33, 0.43, 0.56, 0.75, 1.0, 1.2, 1.5, 1.8, 2.2, 2.7, 3.3, 3.9, 4.7,
5.6, 6.8, 8.2
15
Volume
+24 ~ -103dB ( 0.5dB step ), -
∞dB
Soft transition and soft mute function
Lch / Rch Concurrent control, Sub-Woofer ch Independent control
16
Balance
It decreases by 1dB step from a volume setting value.
( Lch/Rch : 0dB/-
∞dB, 0dB/-126dB, 0dB/-125dB, , 0dB/0dB, ,
-125dB/0dB, -126dB/0dB, -
∞dB/0dB )
17
Post-scaler
Lch / Rch Concurrent control, Sub-Woofer ch Independent control
+24 ~ -103dB (0.5dB step), -
∞dB
18
Output Clipper
A clip with an arbitrary output amplitude is possible.
Lch / Rch Concurrent control, Sub-Woofer ch Independent control
2) Sub Signal line function
No.
Function
Specification
19
Channel Mixer
Mixing of the sound of the left and right channel of the input digital signal to DSP is
set up.
Lch (Lch is input, (Lch+Rch)/2 is input, Rch is input), Rch (Rch is input, (Lch+Rch)/2
is input, Lch is input)
20
LPF
LPF for Sub-Woofer
Fc= 60Hz, 80Hz, 100Hz, 120Hz, 160Hz, 200Hz, 240Hz, 280Hz
21
3-Band
Parametric Equalizer
Peaking or low shelf or high shelf filter is used.
Lch / Rch Concurrent control
22
Volume
+24 ~ -103dB ( 0.5dB step ), -
∞dB
Soft transition and soft mute function
Lch / Rch Concurrent control, Sub-Woofer ch Independent control
23
Balance
It decreases by 1dB step from a volume setting value.
( Lch/Rch : 0dB/-
∞dB, 0dB/-126dB, 0dB/-125dB, , 0dB/0dB, ,
-125dB/0dB, -126dB/0dB, -
∞dB/0dB )
24
Post-scaler
Lch / Rch Concurrent control, Sub-Woofer ch Independent control.
+24 ~ -103dB (0.5dB step), -
∞dB
25
Output Clipper
A clip with an arbitrary output amplitude is possible.
Lch / Rch Concurrent control, Sub-Woofer ch Independent control.
DSP Block diagram
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