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TAS5086DBT Datasheet(PDF) 10 Page - Texas Instruments

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Part # TAS5086DBT
Description  PurePath Digital TM AUDIO SIX-CHANNEL PWM PROCESSOR
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

TAS5086DBT Datasheet(HTML) 10 Page - Texas Instruments

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Channel-6 Processing Section
B0050-01
0x21
0x0D
BQ1(G)
0x23
Gain-
Compensated
Biquad
0x24
Low-
Pass
Biquad
VOL
10dB
BassManagement
Ch1–5
Ch6Sub
FromDownmix(L’+R’)/2
S
BQ1
BQ2
MUX
PWM Section
TAS5086
SLES131A – FEBRRUARY 2005 – REVISED MAY 2006
DETAILED DESCRIPTION (continued)
Channel 6 has processing features that are directly applicable to the subwoofer channel.
Figure 3. Channel-6 Processing Block Diagram
The TAS5086 has six channels of high-performance digital PWM modulators that are designed to drive
switching output stages (back ends) in both single-ended (SE) and H-bridge (bridge-tied load) configurations.
The TAS5086 device uses noise-shaping and sophisticated error correction algorithms to achieve high power
efficiency and high-performance digital audio reproduction. The TAS5086 uses a fourth-order noise shaper to
provide >105-dB SNR performance from 20 Hz to 20 kHz.
The TAS5086 PWM interface is described by using the following notation:
PN + V
where
P = number of PWM signals per channel
N = number of channels
V = total number of valid signals used to reset the power stage
For example, the TAS5086 initial interface format means that there is 1 PWM signal per channel (N = 6) and 1
valid signal is used to reset the power stages. The shorthand notation to describe this is 1N+1.
The PWM section accepts 24-bit PCM data from the serial data interface and outputs six PWM audio output
channels to drive 1N+1 single-ended and BTL power stages.
The PWM interface supports:
TAS5186 in BTL or SE mode without any external glue logic, uses 1N+1 signaling.
TAS5142 in BTL or SE mode without any external glue logic, uses 1N+1 signaling.
TAS5111 SE without any external glue logic, and with a pulldown on the output, uses 1N+1 signaling.
TAS5111 BTL or TAS5112 BTL with one inverter per BTL channel of glue logic and a pulldown on the
output, uses 1N+1 signaling from TAS5086, 2N+1 input to TAS5111/12.
TAS5112 SE (with external glue logic)
See the application schematics for an example of the TAS5086 with the TAS5186 and the TAS5086 with
TAS5112 SE and TAS5111 SE.
10
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