參數(shù)資料
型號: TAS5706PAPR
廠商: TEXAS INSTRUMENTS INC
元件分類: 音頻/視頻放大
英文描述: 20.6 W, 2 CHANNEL, AUDIO AMPLIFIER, PQFP64
封裝: 10 X 10 MM, GREEN, PLASTIC, HTQFP-64
文件頁數(shù): 33/70頁
文件大?。?/td> 1169K
代理商: TAS5706PAPR
www.ti.com
SLOS550B – DECEMBER 2007 – REVISED DECEMBER 2010
For the TAS5706 controller, the gain is the programmed digital gain multiplied by a scaling factor, called the
maximum modulation level. The maximum modulation level is derived from the modulation limit programmed in
the controller, which limits duty cycle to a set number of percent above 0% and below 100%. Setting the
modulation limit to 97.7% (default) limits the duty cycle between 2.3% and 97.7%.
Controller gain = digital gain × maximum modulation level × (modulation level/digital FFS)
Digital FFS = digital input fraction of full scale
Modulation limit = 97.7%
Maximum modulation level = 2 × modulation limit – 1 = 0.954
The output signal level of the TAS5706 can now be calculated.
VRMS = digital FFS × digital gain × maximum modulation level × 13
With the modulation limit set at the default level of 97.7%, this becomes:
VRMS = digital FFS × digital gain × 12.4
(Single-ended)
VRMS = digital FFS × digital gain × 24.8
(BTL)
Example: Input = –20 dbFS; volume = 0 dB; biquads = ALL PASS; modulation index = 97.7%; mode = BTL
Output VRMS = 24.8 × 0.1 × 1 = 2.48 V
Copyright 2007–2010, Texas Instruments Incorporated
39
Product Folder Link(s): TAS5706
相關(guān)PDF資料
PDF描述
TAS5706PAP 20.6 W, 2 CHANNEL, AUDIO AMPLIFIER, PQFP64
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