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Tr i path Technol ogy, I nc. - Techni cal I nfor m ati on
RB-TK2050 PARALLEL
CLASS-T DIGITAL AUDIO AMPLIFIER 1 CHANNEL TK2050 REFERENCE BOARD
Technical Information- Board Rev. 1.0 Revision 1.0 - November 2002
GENERAL DESCRIPTION
The RB-TK2050 Parallel Reference is a single supply, 110W, single channel amplifier designed to provide a simple and straightforward environment for the evaluation of the TK2050 as a mono amplifier. For additional documentation on the TK2050, see the TK2050 Data Sheet.
APPLICATIONS
Powered Subwoofers 4 mono Home Theater Receivers Multi-channel Distribution Powered DVD Systems Mini/Micro Systems
FEATURES
High Continuous Power: 100W @ 4
1/8 power for 1 hour followed by full power for 5 minutes.
BENEFITS
More power per cubic inch for 110W design Simplifies thermal management Signal Quality comparable to high quality, linear amplifiers Simple building block for multichannel design
Low Noise Floor: <110uV A-weighted Low Distortion: .006% THD+N, 20W, 4 .1% THD+N, 82W, 4 1% THD+N, 90W, 4 High Efficiency: 86% @ 110W, 4 Over-Current Protection Over and Under Voltage Protection Over Temperature Protection
1
RB-TK2050 Parallel, Kli/Rev 1.0/ 11.02
Tr i path Technol ogy, I nc. - Techni cal I nfor m ati on
PERFORMANCE CHARACTERISTICS
THD+N vs OUTPUT POWER
10 f = 1kHz RL = 4 VCC = 30V AES17 Filter
EFFICIENCY vs OUTPUT POW ER
90 80 70 f = 1kHz RL = 4 VCC = 30V AES17 Filter
1
EFFICIENCY (% )
1 2 5 10 20 50 100 200
60 50 40 30 20 10
%
0.1
0.01
0.001
0 0 10 20 30 40 50 60 70 80 90 100 110
OUTPUT POW ER (W )
OUTPUT POW ER (W )
OPERATING INSTRUCTIONS
BOARD CONNECTION DIAGRAM
HM UTE
OUT1, G5 J16 J10 M UTE
H e a ts in k
A u d io S o u rc e
IN 1
J7
OUT 1 +
OUT 1
-
2
*
R24
TK 2050 PARALLEL REFEREN CE
VCC GND G5 V5
SPEAKER
RB-TK2050 Parallel, Kli/Rev 1.0/ 11.02
Tr i path Technol ogy, I nc. - Techni cal I nfor m ati on
POWER SUPPLIES
Two external power supplies are required to operate the RB-TK2051: VCC (referenced to GND), and V5 (referenced to G5). The V5 ground (G5) must be kept separate from the VCC ground (GND). GND and G5 are joined at a common point on the RB-TK2050 Parallel Reference Board with a 0 resistor (R1). The Minimum and Maximum VCC supply voltages are +10V and +36V, respectively. The V5 supply voltage is 5V. Please see the TK2050 Data Sheet for Minimum and Maximum values. The VCC and V5 power supply connection (JP1) is a standard 4 pin, .156" Molex header. Please refer to the Board Connection Diagram for the connector locations on the RB-TK2050 Parallel Reference Board.
OUTPUT
The output connection (J7) for the RB-TK2050 Parallel Reference Board is a standard 2 pin, .156" Molex header. The output of the TK2050 is differential; the output has a positive output (OUT1+) and a negative output (OUT1-). Please refer to the Board Connection Diagram for the connector locations on the RB-TK2050 Parallel Reference Board.
INPUT
The input connection for the RB-TK2050 Parallel Reference Board is an RCA connector (J10). The RCA connector is labeled IN1 on the top of the PCB. The input shares a common ground referenced to G5. Please refer to the Board Connection Diagram for the connector locations on the RB-TK2050 Parallel Reference Board.
JUMPER SETTINGS
There is a 2-pin header for the MUTE (J16) control of the TC2000. With the jumper in place the part is unmuted. When the jumper is removed the mute pin is pulled high (5V) and the amplifier is muted. Please refer to the Board Connection Diagram for the connector locations on the RB-TK2050 Parallel Reference Board. INDICATOR LED'S The RB-TK2050 Parallel Reference Board has an LED labeled HMUTE (D2). The LED will glow red and the output is muted when a fault occurs or the MUTE header is set to V5. Please refer to the TK2050 Data Sheet for a complete description of HMUTE. Please refer to the Board Connection Diagram for the LED locations on the RB-TK2050 Parallel Reference Board.
OUTPUT OFFSET NULL
There is a potentiometer, R24 that is used to manually trim the output offset to 0Vdc. Please refer to the Board Connection Diagram for the potentiometer location on the RB-TK2050 Parallel Reference Board. The Reference Board is shipped the output offset nulled within +/-10mV.
GAIN SETTING
The gain of the RB-TK2050 Parallel Reference Board is set to 15V/V. The gain of the TK2050 is the product of the TC2000 (control stage) gain and the TP2050 (power stage) gain. The control stage gain is set to unity. Before changing the gain of the RB-TK2050 Parallel Reference Board, please refer to the Amplifier Gain section of the TK2050 Data Sheet.
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RB-TK2050 Parallel, Kli/Rev 1.0/ 11.02
Tr i path Technol ogy, I nc. - Techni cal I nfor m ati on
PERFORMING MEASUREMENTS ON THE RB-TK2050 Parallel Reference Board:
The TK2050 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 TK2050 amplifier switching pattern will degrade the measurement by including out of band (audio) energy. One feature of the TK2050 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 widebandwidth measuring equipment), these same filters degrade frequency response. The RB-TK2050 Parallel Reference Board 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-TK2050 Parallel, Kli/Rev 1.0/ 11.02
1
V5
JP1 1 2 3 4
VCC
CON4
A
A
J27 1 3/4"STANDOFF
J28 1 3/4"STANDOFF
J29 1 3/4"STANDOFF
J30 1 3/4"STANDOFF
R1
0
Title Size A Date:
TK2050 PARALLEL REFERENCE BOARD Document Number Monday, November 11, 2002 Sheet 1 of 4 Rev 1.0
1
1
Decoupling for 5V header V5 V5
C5 .1u;50V
+
C6 100u;16V;P5529-ND 8.2K
U3 R5 REF OCD1 VLO 15 16 17 18 REF OCD1 VLO OVRLDB VHI GND V5 VP1 IN1 MUTE BBM1 BBM0 VP2 IN2 TC2000 OCD2 NC Y2 Y2B Y1B Y1 HMUTE FDBKN1 FDBKP1 VPWR FDBKN2 DCMP FDBKP2 BIASCAP 14 13 12 11 10 9 8 7 6 5 4 3 2 1 FDBKN2 DCMP FDBKP2 V2BG .1u;50V C7 R33 2K 1 HMUTE 2 D2 LED;RED;67-1342-1-ND R3 R12 40K 40K Y2 Y2B Y2 Y2B OCD2
R53 11K Decoupling for R24 V5 R54 22K V5
19 GND V5 VP1 V5 J16 1 2 CON2 V5 IN1 MUTE BBM1 BBM0 VP2 IN2 20 21 22 23 24 25 26 27 28
C4 .1u;50V
Decoupling for U3, pin 21 V5
A
C1 .1u;50V
A
FDBKN2 R22 1.0K;1% C40 390p;50V R19 14K;1% OUT2A
V5 1
C40, and C41 must be very close to U3.
R19, R22, R27, and R30 must be close to U3.
R24 5K;3296W-502-ND
2 Nets "IN1" must be very short. FDBKP2 R30 R27 14K;1% C41 390p;50V
R4 470K
3
OUT2B
Mouser#161-0390 J10 C9 2.2u;10V;PCS2225CT-ND 1
R26 470K
C3 .1u;50V IN2 VP2
1.0K;1%
1
+
R29 20K
IN1
2
R31 20K 2
Title
TK2050 PARALLEL REFERENCE BOARD
Size B Date: Document Number Monday, November 11, 2002 Sheet 2 of 4 Rev
1.0
1
1
OUT2A U2 29 IBIAS C12 .1u;50V R37 10K R40 10K CONFIG PWRDN C18 .1u;50V 23 24 25 IN1A IBIAS CONFIG PWRDN PROTECTION & LOGIC C11 .47u;50V;P4671-ND VCC 28 Y2 IN1B 30 VCC1B OUT1B M4 18 NC OUT1B GND1B 12 11 OUT1B 10 13 C15 .47u;63V;P4544-ND VCC Y2B IN2A VDD VDD VSS VSS C30 .1u;50V C31 .1u;50V VCCSIGN VCCSIGN C14 .1u;50V GNDREG 31 21 22 33 34 VCC2A OUT2A VDD VDD VSS VSS REGULATORS M15 GND2A OUT2A 7 8 OUT2A 9 6 C22 .1u;50V R42 10;1W C17 .1u;100V;P4725-ND J7 1 2 CON2 C24 .1u;50V M2 GND1A M3 VCC1A OUT1A OUT1A 15 17 OUT1A 16 14 C35 .1u;50V VCC Micrometals T68-2 Core with 44 turns L1 of 22AWG 11u; American Cores #AW690-06-44T-22-V
V5
OUT1+
FAULT
27 26
FAULT TRISTATE
C21 .1u;50V
TH_WAR IN1B
M5
IN2A
M17
A
A
35 36 20 32
VCCSIGN VCCSIGN GNDREG IN2B GNDCLEAN GNDSUB TP2050 M14 M16 VCC2B OUT2B OUT2B GND2B 4 3 OUT2B 2 5 C10 .1u;50V VCC
C23 .47u;50V;P4671-ND
GNDCLEAN GNDSUB
19 1
L2 11u: American Cores # AW690-06-44T-22-V Micrometals T68-2 Core with 44 turns of 22AWG OUT2B
OUT1-
VCC
C37 680u;50V;P10330-ND
+ Title TK2050 PARALLEL REFERENCE BOARD Size B Date: Document Number Monday, November 18, 2002 Sheet 3 of 4 Rev 1.0
1
TK2050 PARALLEL REFERENCE BOARD rev. 1.0 Item Quantity Reference 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 15 1 1 2 1 1 1 2 1 1 1 1 1 4 4 2 1 2 2 1 1 2 1 2 2 1 1 1 1 1 C1,C3,C4,C5,C7,C10,C12,C14, C18,C21,C22,C24,C30,C31,C35 C6 C9 C11,C23 C15 C17 C37 C40,C41 D2 J10 JP1 J7 J16 J27, J28,J29,J30 L1,L2 R3, R12 R1 R4,R26 R19,R27 R5 R33 R22,R30 R24 R29,R31 R37,R40 R42 R53 R54 U2 U3
Revised 11/02 Package Info. CAP0805 X7R MATERIAL Notes:
Part;Digi-Key number .1u;50V
100u;16V;P5529-ND Thru-hole 2.2u;10V;PCS2225CT-ND CAP3612 .47u;50V;P4671-ND Thru-hole .47u;63V;P4544-ND Thru-hole .1u;100V;P4725-ND Thru-hole 680u;50V;P10330-ND Thru-hole 390p;50V;PCC391CGCT-ND CAP0805 LED;P300-ND RED LED RCA; CP-1400-ND CON4; WM4602-ND 4pin, 156Mil CON2; WM4600-ND 2pin, 156Mil B2S 2pin, 100Mil STANDOFF;4800K-ND .250", 4-40 10.4uH 40k RES0805 0 RES0805 470K RES0805 14K;1% RES0805 8.2K RES0805 2K RES0805 1.0K;1% RES0805 5K POT;3306P-502-ND 20K RES0805 10K RES0805 10;1W;P10W-1BK-ND Thru-hole 11K RES0805 22K RES0805 TP2050 PowerSO36 TC2000 28 pin SOIC
WITH HEX NUT H616-ND Amidon/ American Cores AW690-06-44T-22-V or Micrometals T68-2 Core with 44 turns of 22AWG
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