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TAS5086DBT Datasheet(PDF) 10 Page - Texas Instruments |
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TAS5086DBT Datasheet(HTML) 10 Page - Texas Instruments |
10 / 41 page www.ti.com 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 Submit Documentation Feedback |
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