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| Tr i path Technol ogy, I nc. - Technical Information RB-TA2022 CLASS-T DIGITAL AUDIO AMPLIFIER 6 CHANNEL TA2022 REFERENCE DESIGN Technical Information Board Rev. 3.2 Revision 1.0 - November 2001 GENERAL DESCRIPTION The RB TA2022 Version 3.1 is a 6 channel, 100W per channel audio amplifier designed to provide a simple and straightforward environment for the evaluation of the TA2022 amplifier. For additional documentation on the TA2022, see the TA2022 Data Sheet. APPLICATIONS FEATURES High Power: 100W @ 4, 1.0% THD+N Low Noise Floor: 180uV A-weighted Mini/Micro Component Systems Home Theater Receivers Car stereo trunk amplifiers Powered DVD Systems BENEFITS More power per cubic inch for 100W/Channel design Simplifies thermal management Signal Quality comparable to linear amplifiers Low Distortion: .05% THD+N @ 75W, 4 High Efficiency: 92% for 8 loads 87% for 4 loads Dynamic Range = 102dB Over-Current Protection Over and Under Voltage Protection Over Temperature Protection Single Ended Outputs 1 RB-TA2022 - KL/Rev. 1/09.01 Tr i path Technol ogy, I nc. - Technical Information OPERATING INSTRUCTIONS BOARD CONNECTION DIAGRAM TA2022 TA2022 TA2022 VPP VNN Pgnd Agnd 5V OUT1 GND1 OUT2 GND2 OUT3 GND3 Agnd IN 1 - 6 OUT4 GND4 OUT5 GND5 OUT6 GND6 J1 J3 J2 AWAKE MUTE -+ 5V OUT6 OUT5 OUT4 OUT3 OUT2 OUT1 AGND +-++ Audio Source -+ -+ - VPP Pgnd VNN + -+ -+ J4 - Speaker 1 Speaker 2 Speaker 3 Speaker 4 Speaker 5 Speaker 6 POWER SUPPLIES Three external power supplies are required to operate the RB-TA2022: VPP, VNN (referenced to Pgnd), and 5V (referenced to Agnd). The VPP and VNN form a split rail supply referenced to Pgnd. The 5V ground (Agnd) must be kept separate from the VPP and VNN ground (Pgnd). Agnd and Pgnd are joined at a common point on the RB-TA2022. Minimum and Maximum supply voltages are +/-20V and +/-36V, respectively, depending on the load impedance. It is not recommended that the RB-TA2022 be operated above +/-31V when driving 4 loads, single ended, as the internal current limit circuit may activate, causing the amplifier to mute. The VPP and VNN power supply connection, J2, is through a 5-Pin 0.156" spaced header. The female terminal housing for this header is Molex 09-50-8051. Please see TABLE 1 for header connections. The 5V power supply connection, J2, is through a 5-Pin 0.156" spaced header. The female terminal housing for this header is Molex 09-50-8051. Please see TABLE 1 for header connections. TABLE 1 J3 Connector Pin# Connection Pin1 5V Pin2 Agnd Pin3 Pgnd Pin4 VNN Pin5 VPP 2 RB-TA2022 - KL/Rev. 1/09.01 Tr i path Technol ogy, I nc. - Technical Information OUTPUT The output connection, J3 and J4, is through two 6-Pin 0.156" spaced headers. The female terminal housing for this header is Molex 09-50-8061. The output of the TA2022 is single-ended, therefore each output has a positive output (OUT1) and a ground (GND1). Please see TABLE 2 for header connections. TABLE 2 J3 Connector Pin# Pin1 Pin2 Pin3 Pin4 Pin5 Pin6 Connection GND3 OUT3 GND2 OUT2 GND1 OUT1 J4 Connector Pin# Pin1 Pin2 Pin3 Pin4 Pin5 Pin6 Connection GND6 OUT6 GND5 OUT5 GND4 OUT4 INPUT The input connection, J1, is through a 7-Pin 0.100" spaced header. The female terminal housing for this header is Molex 22-01-2077. The six inputs share a common ground referenced to Agnd. Please see TABLE 3 for header connections. TABLE 3 J1 Connector Pin# Connection Pin1 Agnd Pin2 IN1 Pin3 IN2 Pin4 IN3 Pin5 IN4 Pin6 IN5 Pin7 IN6 JUMPER SETTINGS There is a 3-pin header for the MUTE control of the three TA2022's. With the jumper placed in the AWAKE position the part is un-muted by grounding (AGND) the mute pin. When the jumper is placed in the MUTE position the mute pin is pulled high (5V) and the amplifier is muted. OUTPUT OFFSET NULL There is a potentiometer for each channel that is used to manually trim each channels output offset to 0V. GAIN SETTING The gain of each channel for the RBTA2022 is set to 18V/V. The gain of the TA2022 is the product of the input stage and the modulator stage. The input stage gain is set to unity. Before changing the gain of the TA2022, please refer to the TA2022 Amplifier Gain section of the TA2022 Data Sheet. 3 RB-TA2022 - KL/Rev. 1/09.01 Tr i path Technol ogy, I nc. - Technical Information Performing Measurements on the RBTA2022 Version 3.2 The TA2022 operates by generating a high frequency switching signal based on the audio input. This signal is sent through a low-pass filter that recovers an amplified version of the audio input. The frequency of the switching pattern is spread spectrum in nature and typically varies between 100kHz and 1MHz, which is well above the 20Hz - 20kHz audio band. The pattern itself does not alter or distort the audio input signal, but it does introduce some inaudible components. The measurements of certain performance parameters, particularly noise related specifications such as THD+N, are significantly affected by the design of the low-pass filter used on the output as well as the bandwidth setting of the measurement instrument used. Unless the filter has a very sharp roll-off just beyond the audio band or the bandwidth of the measurement instrument is limited, some of the inaudible noise components introduced by the TA2022 amplifier switching pattern will degrade the measurement by including out of band (audio) energy. One feature of the TA2022 is that it does not require large multi-pole filters to achieve excellent performance in listening tests, usually a more critical factor than performance measurements. Though using a multi-pole filter may remove high-frequency noise and improve THD+N type measurements (when they are made with wide-bandwidth measuring equipment), these same filters degrade frequency response. The RB-TA2022 has a simple two-pole output filter with excellent performance in listening tests. (See Application Note 4 for additional information on bench testing) Contact Information TRIPATH TECHNOLOGY, INC 2560 Orchard Parkway, San Jose, CA 95131 408.750.3000 - P 408.750.3001 - F For more Sales Information, please visit us @ www.tripath.com/cont_s.htm For more Technical Information, please visit us @ www.tripath.com/data.htm 4 RB-TA2022 - KL/Rev. 1/09.01 1 VPP 5V Agnd Pgnd VNN MUTE J5 5V MUTE 1 2 3 HEADER 3 V+ 5V AGnd PGnd MUTE V- In1 Out1 Agnd Amplifier 2 In2 Out2 VPP 5V Agnd Pgnd VNN MUTE V+ 5V AGnd PGnd MUTE V- J3 6 5 4 3 2 1 CON6 Pgnd J2 5 4 3 2 1 CON5 VPP VNN Pgnd Agnd 5V J1 Agnd In3 Out3 1 2 3 4 5 6 7 CON7 In4 Out4 A Amplifier 1 A VPP 5V Agnd Pgnd VNN MUTE V+ 5V AGnd PGnd VMUTE J4 6 5 4 3 2 1 CON6 Pgnd Agnd L10 Pgnd FERRITE BEAD(100MhZ) In5 Out5 Ground plane is split in two. Join both halves together with a ferrite bead or short. Amplifier 3 In6 Out6 Title 6 Channel TA2022 Reference Board Size B Date: Document Number Rev Top Level Tuesday, January 15, 2002 Sheet 1 of RB3.2 5 1 1 TA2022-100 tornado_32p_zip_6 VN10FBK HO2COM HO1COM VN10SW VBOOT2 VBOOT1 U1 VNSENSE FBKGND2 FBKGND1 VPSENSE FBKOUT2 FBKOUT1 31 BIASCAP OAOUT1 OAOUT2 HMUTE 32 PGND AGND AGND MUTE OUT2 OUT1 VNN2 VNN1 VPP2 VPP1 VN10 INV1 INV2 26 REF V5 V5 21 10 11 12 13 14 15 16 17 18 19 20 22 23 24 25 27 28 29 L1 100uH; Toko 187LY-101J VN10 1 R50 10 C31 100uF;35v VN10FDBK C17 0.1uF;50V VC6 C18 100uF;35V 0.1uF;35V R23 250 1 2 D10 B1100/B C4 47uF;16v C16 .1uF;16V R21 1k 2 D14 B1100/B D2 MURS120 1 1 2 2 1 D6 MURS120 1 Vnsense1 D4 MURS120 5V Vpsense1 2 2 30 1 2 3 4 5 6 7 8 9 D3 MURS120 C11 220uF;50v C19 0.1uF;100V R10 20k R8 20k In3 R7 20K R9 20K C7 1uF;16V In4 C8 1uF;16V C20 0.1uF;100V R28 8.2k MUTE C52 0.1uF;16v C43 0.1uF;16v C12 220uF;50v C53 0.1uF;16v PGnd VPP VNN 2 D7 B1100/B 1 C15 .1uF;16V R22 250 C5 47uF;16v R5 9.1k R6 9.1k R16 1k AGnd 5V R18 1k R15 1k R17 1k R12 249k Vpsense1 L2 11uH T60-2, 22 AWG R14 9.1k L3 11uH T60-2, 22AWG C10 0.22uF;50V V+ A A R13 9.1k C51 330pF;50V Out3 Out4 C14 0.22uF;50V R1 6;2W R2 6;2W R20 5k 3 C50 120pF;50V R4 50k Pot 1 R27 1.2k R25 1.2k R19 5k 3 Vnsense1 R11 249k R3 50k Pot 2 2 1 R26 1.2k R24 1.2k AGnd V- PGnd C13 0.22uF;50V C9 0.22uF;50V Tripath Technology Inc. Title 6 Channel TA2022 Demo Board Size B Date: Document Number Rev Amplifier 1 Tuesday, January 15, 2002 Sheet 3 of RB3.2 5 1 1 TA2022-100 tornado_32p_zip_6 VN10FBK HO2COM HO1COM VN10SW VBOOT2 VBOOT1 U2 VNSENSE FBKGND2 FBKGND1 VPSENSE FBKOUT2 FBKOUT1 31 BIASCAP OAOUT1 OAOUT2 HMUTE 32 PGND AGND AGND MUTE OUT2 OUT1 VNN2 VNN1 VPP2 VPP1 VN10 INV1 INV2 26 REF V5 V5 21 10 11 12 13 14 15 16 17 18 19 20 22 23 24 25 27 28 29 R77 10 VN10 C56 0.1uF;35V VC33 100uF;35V 1 D5 MURS120 1 2 2 1 D13 MURS120 1 Vnsense2 Vpsense2 D11 MURS120 R43 20k R44 20k In1 R51 20K R32 20K C36 1uF;16V In2 MUTE R42 8.2k C49 0.1uF;16v C21 0.1uF;16v C48 0.1uF;16v C35 1uF;16V 2 2 D12 MURS120 C32 C44 220uF;50v 0.1uF;100V C45 0.1uF;100V 5V C29 220uF;50v R48 250 1 2 D8 B1100/B PGnd VPP VNN 2 D9 B1100/B 1 C41 .1uF;16V R47 250 C28 47uF;16v R52 9.1k R31 9.1k R30 1k AGnd 5V R33 1k R34 1k R35 1k R45 249k Vpsense2 L6 11uH T60-2, 22 AWG Out1 Out2 C37 0.22uF;50V R56 6;2W R57 6;2W C40 0.22uF;50V R37 9.1k L5 11uH T60-2, 2 AWG V+ A 30 1 2 3 4 5 6 7 8 9 C27 47uF;16v C42 .1uF;16V A R41 9.1k C46 100pF;50V R49 5k 3 C47 22pF;50V R55 50k Pot 1 R39 R40 1.2k 1.2k R53 5k 3 Vnsense2 R46 249k R54 50k Pot 2 2 1 R36 R38 1.2k 1.2k AGnd V- PGnd C38 0.22uF;50V C39 0.22uF;50V Tripath Technology Inc. Title 6 Channel TA2022 Demo Board Size B Date: Document Number Rev Amplifier 2 Tuesday, January 15, 2002 Sheet 3 of RB3.2 5 1 1 TA2022-100 tornado_32p_zip_6 VN10FBK HO2COM HO1COM VN10SW VBOOT2 VBOOT1 U3 VNSENSE FBKGND2 FBKGND1 VPSENSE FBKOUT2 FBKOUT1 31 BIASCAP OAOUT1 OAOUT2 HMUTE 32 PGND AGND AGND MUTE OUT2 OUT1 VNN2 VNN1 VPP2 VPP1 VN10 INV1 INV2 26 REF V5 V5 21 10 11 12 13 14 15 16 17 18 19 20 22 23 24 25 27 28 29 R85 10 VN10 C34 0.1uF;35V VC30 100uF;35V 1 D15 MURS120 1 2 2 1 D18 MURS120 1 Vnsense3 Vpsense3 D17 MURS120 R66 20k R64 20k In5 R63 20K R65 20K C57 1uF;16V In6 MUTE R84 8.2k C83 0.1uF;16v C22 0.1uF;16v C84 0.1uF;16v C58 1uF;16V 2 2 D16 MURS120 C61 C70 220uF;50V 0.1uF;100V C71 0.1uF;100V 5V C62 220uF;50V R79 250 1 2 D20 B1100/B PGnd VPP VNN R78 250 2 D19 B1100/B 1 C65 .1uF;16V C55 47uF;16V R61 9.1k R72 1k R62 9.1k R74 1k R71 1k R73 1k R68 249k Vpsense3 L8 11uH T60-2, 22 AWG Out5 Out6 C64 0.22uF;50V R29 6;2W R58 6;2W C60 0.22uF;50V R70 9.1k L9 11uH T60-2, 22 AWG AGnd 5V V+ A C54 47uF;16V C66 .1uF;16V 30 1 2 3 4 5 6 7 8 9 A R69 9.1k C82 470pF;50V R76 5k 3 C81 180pF;50V R60 50k Pot 1 R83 R81 1.2k 1.2k R75 5k 3 Vnsense3 R67 249k R59 50k Pot 2 2 1 R82 R80 1.2k 1.2k AGnd V- PGnd C63 0.22uF;50V C59 0.22uF;50V Tripath Technology Inc. Title 6 Channel TA2022 Demo Board Size B Date: Document Number Rev Amplifier 3 Tuesday, January 15, 2002 Sheet 3 of RB3.2 5 1 RB-TA2022 Ver3.2 Revised: 09/16/2002 JR. Revision: Ver3.2 Bill Of Materials Item Quantity Reference Part Digikey Part # Manufacturers Part# (Package) ________________________________________________________________________________________________________________ 1 19 C15,C16,C17,C18, 0.1uF;50V PCC1864CT-ND Panasonic ECJ-2VF1H104Z(SMT 0805) C21,C22,C34,C41, C42,C43,C48,C49, C52,C53,C56,C65, C66,C83,C84 2 6 C19,C20,C44,C45 0.1uF;100V AVX 12061C104KAT2A (SMT 1206) C70,C71 3 1 C47 22pF:50V (SMT 0805) 4 1 C46 100pF;50V PCC101CGCT-ND Panasonic ECJ-2VC1H101J(SMT 0805) 5 1 C51 330pF;50V PCC331CGCT-ND PANASONIC ECJ-2VC1H331J(SMT 0805) 6 1 C50 120pF;50V (SMT 0805) 7 1 C82 470pF;50V (SMT 0805) 8 1 C81 180pF;50V (SMT 0805) 9 6 C7,C8,C35,C36 3.3uF;6.3V PCC1925CT-ND (SMT 0805) C57,C58 10 12 C9,C10,C13,C14, 0.22uF;50V P4667-ND Panasonic ECQ-V1H224JL(Thru-Hole) C37,C38,C39,C40, C59,C60,C63,C64 11 6 C11,C12,C29,C32 220uF;50V P10325-ND Panasonic EEU-FC1H221(Thru-Hole) C61,C62 12 4 C6,C30,C31,C33 100uF;35V P5165-ND Panasonic ECA-1VM101(Thru-Hole) 13 6 C4,C5,C27,C28, 47uF;16v P810-ND Panasonic ECE-A1CKA470(Thru-Hole) C54,C55 14 7 D7,D8,D9,D10, B1100/B B1100DICT-ND Diodes Incorporated (SMA) D14,D19,D20 15 12 D2,D3,D4,D5,D6, MURS120T3 MURS120T3 (SMT SMB) D11,D12,D13,D15, D16,D17,D18 16 2 J3,J4 6-pin,0.156" header Molex 26-60-4060 17 1 J1 7-pin,0.100" header Molex 22-23-2071 18 1 J5 3-pin,0.100" header WM4001-ND Molex 22-03-2031 19 1 J2 5-pin, .156" header Molex 26-60-4050 20 1 Screw Terminal 8190K-ND Keystone 8190 21 1 L1 100uH 4300-ND JWMiller 6000-101k or Toko 187LY-101J 22 6 L2,L3,L5,L6, 10.4uH *See note 1 American Cores/Amidon AW600-06-40T-24-H L8,L9 23 1 L10 Ferrite Bead P10191CT-ND 100MhZ (SMT 0805) 24 25 12 13 R7,R8,R9,R10,R32, 20k 1% R43,R44,R51,R63, R64,R65,R66 R15,R16,R17,R18, 1K R21,R30,R33,R34, (SMT 0805) (SMT 0805) 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 12 6 12 6 6 3 6 6 3 3 2 2 1 6 6 R35,R71,R72,R73, R74 R24,R25,R26,R27, R36,R38,R39,R40, R80,R81,R82,R83 R3,R4,R54,R55, R59,R60 R5,R6,R13,R14, R31,R37,R41,R52, R61,R62,R69,R70 R1,R2,R29,R56, R57,R58 R11,R12,R45,R46 R67,R68 R28,R42,R84 R22,R23,R47,R48, R78,R79 R19,R20,R49,R53, R75,R76 R50,R77,R85 U1,U2,U3 1.2K 50k Pot 9.1K,1% 6;2W 249K,1% 8.2K,1% 249 5K 10 TA2022 3/8"STANDOFF STANDOFF NUT 1/4" 4-40 NO. 4 FLAT 3/8" 4-40 P6.2W-2BK-ND 3306P-503-ND (SMT 0805) Bourns 3306P (SMT 0805) (2W Thru-hole) (SMT 0805) (SMT 0805) (SMT 0805) (SMT 0805) (SMT 0805) Tripath Technology 4801K-ND H616-ND H342-ND H734-ND H781-ND Note 1: Inductor selection is critical for optimal operation of the TA2022 as well as being an important component in over current protection and EMI containment. Tripath recommends the customer use a toroidal inductor for all applications with the TA2022. This board uses the American Cores T600-06 core(Micrometals T60-2)(15.2mm outer diameter) which was selected for multi-channel applications. For higher power applications or high ambient conditions we recommend the Micrometals T68-2 core or the American Cores (Amidon) T690-06. These cores have a high peak current capability due to its low- Carbonyl-E metal powder. A distributed air gap increases its' energy storage capability, which allows for a small footprint and high current capability. The T68-2 and T690-06 cores have a 17.5mm outer diameter. Forty-four turns of 22AWG wire makes a complete single layer winding around the toroid with six to eight layers overlapping yielding an ideal value of 11uH. This winding pattern, which covers the core completely, aids in shielding the electric field. It should be noted that when multiple layers are used there may be an increase in winding capacitance, which can cause ringing and increased radiated emmisions. Winding techniques, such as bank winding, can minimize this effect. It is important that the innitial windings not be crossed over by the last few windings. If a few windings more than the single layer are required it is best to wind the core with a full single layer, back off a number of turns,and rewind over the last few windings. A larger diameter Carbonyl-E core may be used if a single layer wound core is required. Please contact Tripath Applications if there are questions pertaining to this subject. Substitution Notes: 1- ITEM#2- This component must be .1uF, 100V with X7R material characteristic and placed closely to pins 4,8 and 9,10 of TA2022 with less than 1/8" lead length to the part. 2- ITEM#11- This component should be a high frequency,low ESR capacitor. We recommend .1 ohm, or less and a ripple current rating of at least 1A. 3- ITEM#22- This component should be a 10A inductor with very high linearity. 4- ITEM#15- This component should be an ultra-fast PN junction rectifier diode with a maximum Vf of 1V at 10A. 5- ITEM#14- The Bootstrap Diodes(D7, D8, D9, D10, D19, D20) should be a Schottky diode rated at least 200mA,100V,50nS. The VN10 Diode (D14) should be a Fast Recovery, switching, or Shottky diode rated at least 200mA,30V,50nS. |
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