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參數資料
型號: TFA9812HN/N1,557
廠商: NXP SEMICONDUCTORS
元件分類: 音頻/視頻放大
英文描述: 15 W, 2 CHANNEL, AUDIO AMPLIFIER, PQCC48
封裝: 7 X 7 MM, 0.85 MM HEIGHT, PLASTIC, MO-220, SOT619-8, HVQFN-48
文件頁數: 13/66頁
文件大小: 386K
代理商: TFA9812HN/N1,557
TFA9812_2
NXP B.V. 2009. All rights reserved.
Preliminary data sheet
Rev. 02 — 22 January 2009
20 of 66
NXP Semiconductors
TFA9812
BTL stereo Class-D audio amplier with I2S input
8.5.2 Digital volume control
In I2C control mode both audio channels have separate digital volume control. In Legacy
control mode the volume control of both channels is common and the volume control
setting depends on the supply voltage on the pin AVOL (32).
8-bit volume control is available per channel. This is dB-linear down to
124 dB in steps of
0.5 dB. The last step of the volume control is mute.
Table 16 shows the various settings and their related channel suppression:
Fig 7.
Transfer functions for several center frequencies fc
Fig 8.
Transfer functions for several gain factors G
010aaa223
Frequency (Hz)
101
105
104
102
103
4
8
12
Gain
(dB)
0
010aaa224
Frequency (Hz)
101
105
104
102
103
0
-6
6
12
Gain
(dB)
-12
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