CLASS-T DIGITAL AUDIO AMPLIFIER MINI REFERENCE BOARD USING DIGITAL POWER PROCESSING TM TECHNOLOGY

Transcription

1 Tripath Technology, Inc. - Technical Information RB-TA CLASS-T DIGITAL AUDIO AMPLIFIER MINI REFEREE BOARD USING DIGITAL POWER PROCESSING TM TECHNOLOGY Technical Information Rev B January 2003 Introduction Measuring only 1.2 x 1.6, the Mini TA2024 (RB-TA ) was created to provide the systems designer with a minimal footprint reference for use in space-constrained applications of the TA2024 2x15W high efficiency amplifier. The board is a complete TA2024 2x15W circuit, ready to evaluate. It needs only power, signal and passive speakers to be up and running. Connection and Operation Below is a simple diagram showing the input and output connection requirements of the RB-TA The +12V supply must not exceed 13.2V at any time, or damage to the device may occur. A low level stereo signal source, such as a portable MP3 or CD player can be used for the input, while normal passive bookshelf or home theater speakers (4 ohms minimum) can be used for the outputs. Application Information When playing music, lower output power levels can be sustained indefinitely, while higher levels can be played for only a limited time due to the small size of the copper area of the pc board. The TA2024 is extremely efficient, approaching 90% with an 8Ω load; however, the dissipated power inside the TA2024, though relatively small, still generates heat. This heat conducts through the TA2024 s heat slug and onto the pc board area to which the heat slug is soldered. In final end applications, the TA2024 and its associated components will be part of a larger system design where more heat sinking area will be available, via multi layers or larger ground plane, or both. Please consult the TA2024 datasheet for more information on power dissipation requirements. Warning: The intended purpose of the RB-TA is to show a minimum footprint application for TA2024 and its associated components. Though it is a fully functional design, it is NOT intended to be used as a standalone amplifier product. For final product application, please consult the Power Dissipation section in the TA2024 datasheet for necessary thermal requirements. +12V GND CH1 GND OUT1+ OUT1- CH2 OUT2- OUT2+ NOTE: Board shown ACTUAL SIZE when printed on 8.5 x 11 paper Browse our extensive range of Tripath and other audio parts at 1 RB-TA

2 Tripath Technology, Inc. - Technical Information Contact Information TRIPATH TECHNOLOGY, I 2560 Orchard Parkway, San Jose, CA P F For more Sales Information, please visit For more Technical Information, please visit Browse our extensive range of Tripath and other audio parts at 2 RB-TA

3 A 1 1 A L5 12V+ J9 BEAD C21 GND J10 12V+ GND U2 TA V_PLANE C17 1uF 0.1u C GEN DCAP2 DCAP1 CPUMP PGND C5 1uF +12V_PLANE L8 10uH C27 C12 C8 J5 OUT1+ J3 IN1 J14 GND L1 C23 BEAD 1uF C14 1uF C15 20K R2 20K R4 R5 R6 40k 40k 4 V5D R7 8.2K, 1% 5 AGND1 32 R C28 10 REF OUTP1 L6 7 OVERLOADB VDD1 30 C19 470u_25V 8 AGND2 VDD uH 9 V5A OUTM VP1 OUTM IN1 VDD2 26 C7 12 MUTE VDD u L7 13 OUTP uH VP2 IN2 DGND C6 0.1u C25 C O P P E R A R E A * VDDA 33 + C13 C29 0.1uF C10 C9 J6 J7 OUT1- OUT2+ J4 IN2 L2 C24 BEAD C26 0.1u BIASCAP AGND3 PGND2 18 SLEEP FAULT L9 10uH C22 R10 10 C30 0.1uF C11 J8 OUT2- R11 0ohms R3 0ohms Title TRIPATH TECHNOLOGY I. TA2024 MINI Size Document Number Rev B <Doc> B Date: Wednesday, February 27, 2002 Sheet 1 of 1 Browse our extensive range of Tripath and other audio parts at

4 TA2024 Mini Eval Board Bill Of Materials MC 2/13/2003 Quantity Reference Part Size Digikey Manufacturer Manufact. Part # 2 C17,C5 1uF 16V CERAMIC X7R ND Yageo America 12062R105K7BB0D 4 C6,C7,C16,C26, C29, C30 0.1uF 50V CERAMIC X7R ND Yageo America 08052R104K9BB0D 7 C8,C9,C10,C11,C21,C23, Ceramic NPO 603 PCC101ACVCT-ND Panasonic ECJ-1VC1H101J C24 6 C12,C13,C22,C25,C27,C28 16V CERAMIC X7R PCC1818CT-ND Panasonic ECG ECJ-2YB1C474K 2 C14,C15 1uF 16V CERAMIC X7R ND Yageo America 12062R105K7BB0D 1 C19 470uF Electrolytic 25V G PCE3189CT-ND Panasonic ECE-V1EA471P 3 L1,L2,L5 Ferrite Bead FBM2125 BEAD CORE 4A 100 MHZ 0805 P10191CT-ND Panasonic ECG EXC-ML20A390U 4 L6,L7,L8,L9 Power INDUCTOR FIXED 10UH 2A 10% TOKO 8RHB2 or ISI RL \400 TK4467-ND Toko America 822MY-100K (8RHB2) 2 R4,R2 20K 603 P203HTR-ND Panasonic ERJ-3EKF2002V 2 R11,R3 0ohms 603 P0HTR-ND Panasonic ERJ-3EKF0000V 2 R6,R5 40k 603 P403HTR-ND Panasonic ERJ-3EKF4002V 1 R7 8.2K, 1% 603 P822HTR-ND Panasonic ERJ-3EKF8201V 2 R10,R9 10, 1/8W 805 P10ETR-ND Panasonic ERJ-6ENF1000V 1 U2 TA2024 Browse our extensive range of Tripath and other audio parts at

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