參數(shù)資料
型號： TFA9812HN
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(shù)： 32/66頁
文件大?。?/td> 386K
代理商： TFA9812HN
TFA9812_2
NXP B.V. 2009. All rights reserved.
Preliminary data sheet
Rev. 02 — 22 January 2009
38 of 66
NXP Semiconductors
TFA9812
BTL stereo Class-D audio amplier with I2S input
[1]
The diagnostic pin 30 DIAG is agged when several protection mechanisms have been active, see
9.6 Overview of functional control in each control mode
Table 51 shows the control level supported by either I2C or Legacy control mode for all
functions described in Section 9. It summarizes the information provided in the detailed
description of each function.
3
UVP3V3
Undervoltage detector for pins 3 and 40:
0 = No UVP has been detected
1 = A UVP has been detected since the last read-out of
the register
2
DIAG
Diagnostic pin agging status[1]:
0 = Diagnostic pin has not been agged low
1 = Diagnostic pin has been agged low since the last
read-out of the register
1
LP
PLL lock protection indicator:
0 = PLL is in locked status
1 = PLL is not in locked status
0
MUTE
Soft mute status:
0 = No soft-mute or soft mute/demute in progress
1 = Audio signal muted as result of a soft mute
Table 50.
Bit description of register 30h: miscellaneous status …continued
Bit
Symbol
Description
Table 51.
Functional control support in I2C and Legacy control modes
D = xed control setting, determined by default I2C register setting; N = not supported; Y = fully
supported (i.e. all options implemented in the TFA9812).
Control function
Reference
I2C mode
Legacy mode
I2C register content
Y
N/D
Sleep mode enable
YY
Operating mode enable
YY
3-state mode enable
YY
Master/Slave I2S
YY
MCLK/BCK master input clock selection
Auto
Digital audio input format selection
Y
Subset
Selection fs = 8 kHz to192 kHz
YD[1]
Equalizer enable and conguration
YD[2]
Detailed equalizer settings
YN
Digital volume control per channel
YN
Analog volume control (shared for two channels) Section 8.5.3
NY
De-emphasis for subset of allowed fs
YN
Soft mute
YY[3]
Hard mute
YN
Polarity switch enable
YN
+24 dB gain boost
YY
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