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TC2001 Datasheet(PDF) 20 Page - Tripath Technology Inc. |
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TC2001 Datasheet(HTML) 20 Page - Tripath Technology Inc. |
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20 / 34 page  Tr i p ath Technol ogy, I n c. - Techni cal In fo rma t io n 20 TK2150 – Rev. 1.0/12.02 FBKGND1 FBKOUT1 27 28 1/2 TC2001 Processing & Modulation R FBA R FBA R FBB R FBB R FBC R FBC OUT1 OUT1 GROUND V5 AGND Figure 3: Modulator Feedback The modulator feedback resistors are: Ω = 1K typically specified, User RFBA 4) - (VPP VPP * R R FBA FBB = 4 VPP * R R FBA FBC = 1 R * R ) R (R * R A FBB FBA FBB FBA FBC MODULATOR - V + + ≈ The above equations assume that VPP=|VNN|. For example, in a system with VPPMAX=40V and VNNMAX=-40V, RFBA = 1kΩ, 1% RFBB = 1.097kΩ, use 1.1kΩ, 1% RFBC = 10.0kΩ, use 10.0kΩ, 1% The resultant modulator gain is: 20.09V/V 1 1.1k Ω * 1.0k Ω ) 1.1k (1.0k Ω * 10.0k Ω A MODULATOR - V = + Ω + ≈ Mute When a logic high signal is supplied to MUTE, both amplifier channels are muted (both high- and low-side transistors are turned off). When a logic level low is supplied to MUTE, both amplifiers |
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