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RB-TK2051
CLASS-T DIGITAL AUDIO AMPLIFIER 2 CHANNEL TK2051 EVALUATION BOARD
Technical Information- Board Rev. 1.4 Revision 1.0 - April 2002
GENERAL DESCRIPTION
The RB-TK2051 Revision 1.4 is a stereo 50W per channel audio amplifier designed to provide a simple and straightforward environment for the evaluation of the TK2051 amplifier as well as a small footprint reference design (3.2" X 2"). For additional documentation on the TK2051, see the TK2051 Data Sheet.
APPLICATIONS
6 and 8 stereo 4 mono (parallel operation) Home Theater Receivers Multi-channel Distribution Powered DVD Systems Mini/Micro Systems
FEATURES
High Continuous Power: 46W @ 6 50W @ 8
1/8 power for 1 hour followed by full power for 5 minutes.
BENEFITS
More power per cubic inch for 50W/Channel design Simplifies thermal management Signal Quality comparable to high quality, linear amplifiers Simple building block for multichannel design
Low Noise Floor: <135uV A-weighted Low Distortion: .005% THD+N, 20W, 6 .005% THD+N, 30W, 8 High Efficiency: 85% @ 46W, 6 89% @ 59W, 8 Over-Current Protection Over and Under Voltage Protection Over Temperature Protection
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RB-TK2051, Kli/Rev 1.4/ 04.02
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PERFORMANCE CHARACTERISTICS
THD+N vs. OUTPUT POWER (per channel)
10 10
THD+N vs. OUTPUT POWER (per channel)
1
f=1kHz RL=6 VCC=23.5V AES17 Filter
%
1
f=1kHz RL=8 VCC=30V AES17 Filter
%
0.1
0.1
0.01
0.01
0.001 1 2 5 10 W 20 50 100
0.001 1 2 5 10 W 20 50 100
THD+N vs OUTPUT POWER (parallel operation)
10
EFFICIENCY vs OUTPUT POWER (parallel operation) 90 80 70 EFFICIENCY (%) 60 50 40 30 20 10
1
f=1kHz RL=4 VCC=30V AES17 Filter
f=1kHz RL=4 VCC=30V
%
0.1
0.01
0.001 1 2 5 10 W 20 50 100 200
0 0 10 20 30 40 50 60 70 80 90 100 110 120 OUTPUT POWER (W)
EFFICIENCY vs OUTPUT POWER (per channel)
EFFICIENCY vs OUTPUT POWER (per channel) 90 80 70 EFFICIENCY (%) 60 50 40 30 20 10 0 0 5 10 15 20 25 30 35 40 45 50 OUTPUT POWER (W)
90 80 EFFICIENCY (%)
f=1kHz RL=6 VCC=23.5V
70 60 50 40 30 20 10 0 0 5 10 15 20 25 30 35
F=1kHz RL=8 VCC=30V
40
45
50
55
60
OUTPUT POWER (W)
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RB-TK2051, Kli/Rev 1.4/ 04.02
Tr i path Technol ogy, I nc. - Techni cal I nfor m ati on
OPERATING INSTRUCTIONS
BOARD CONNECTION DIAGRAM
O U T 2+, 2E B - T K 2 0 5 1 R E V 1 . 4 6 /0 2 MUTE G5 V5 J1
+
H e a ts in k
JP 3
R 24 R 16 JP 1
HMUTE D1 V5 G5 JP 2 GNDVCC
O U T 1+, 1-
**
+
A udio S ou rce O U T 1, G 5 O U T 2, G 5
+V5
-+
VCC
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-TK2051 with a 0 resistor (R1). The Minimum and Maximum VCC supply voltages are +10V and +30V, respectively. The V5 supply voltage is 5V. Please see the TK2051 Data Sheet for Minimum and Maximum values. The VCC and V5 power supply connection (JP2) is a standard 4 pin, .156" Molex header. Please refer to the Board Connection Diagram for the connector locations on the RB-TK2051.
OUTPUT
The output connection (JP3) for the RB-TK2051 is a standard 4 pin, .156" Molex header. The output of the TK2051 is differential; therefore each output has a positive output (OUT1+ and OUT2+) and a NEGATIVE OUTPUT (OUT1- AND OUT2-). Please refer to the Board Connection Diagram for the connector locations on the RB-TK2051.
INPUT
The input connection for the RB-TK2051 is a dual RCA connector (JP1). The RCA connector is labeled IN1 and IN2 on the bottom of the PCB. These inputs share a common ground referenced to G5. Please refer to the Board Connection Diagram for the connector locations on the RB-TK2051.
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RB-TK2051, Kli/Rev 1.4/ 04.02
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JUMPER SETTINGS
There is a 3-pin header for the MUTE (J1) control of the TK2051. With the jumper placed in the G5 position the part is un-muted. When the jumper is placed in the V5 position 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-TK2051. INDICATOR LED'S The RB-TK2051 has an LED labeled HMUTE (D1). The LED will glow red and both outputs are muted when a fault occurs or the MUTE header is set to V5. Please refer to the TK2051 Data Sheet for a complete description of HMUTE. Please refer to the Board Connection Diagram for the LED locations on the RB-TK2051.
OUTPUT OFFSET NULL
There are two potentiometers, R16 (Channel 1) and R24 (Channel 2) that are used to manually trim the output offset to 0Vdc. Please refer to the Board Connection Diagram for the potentiometer locations on the RBTK2051. The Evaluation board is shipped each channels offsets nulled within +/-10mV.
GAIN SETTING
The gain of the RB-TK2051 Rev 1.3 is set to 15V/V. The gain of the TK2051 is the product of the TC2000 (control stage) gain and the TP2051 (power stage) gain. The control stage gain is set to unity. Before changing the gain of the RB-TK2051, please refer to the Amplifier Gain section of the TK2051 Data Sheet.
PERFORMING MEASUREMENTS ON THE RB-TK2051 Rev 1.4:
The TK2051 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 TK2051 amplifier switching pattern will degrade the measurement by including out of band (audio) energy. One feature of the TK2051 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-TK2051 has a simple two-pole output filter with excellent performance in listening tests. (See Application Note 4 for additional information on bench testing)
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RB-TK2051, Kli/Rev 1.4/ 04.02
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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
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RB-TK2051, Kli/Rev 1.4/ 04.02
1
J4 1 STANDOFF J5 1 STANDOFF J3 1 STANDOFF J2 1 STANDOFF G5 GND
VCC C5 .1u;50V JP2 1 2 3 4 CON4
GND G5 B1 FBP1 Y1 Y1B FBN1 FBP2 Y2 Y2B FBN2 B2 OUT1A IN1A IN1B OUT1B OUT2A IN2A IN2B OUT2B
C20 .1u;50V
V5
OUT2N JP3 OUT2P OUT1N 1 2 3 4 CON4
TC
TP R1 OUT1P
A
A
0
Title Size A Date:
TK2051 EVAL BOARD Document Number Monday, July 22, 2002 Sheet 1 of 3 Rev 1.4
1
1
V5 V5 V5 V5
+
C4 100u;16V;P5529-ND
C1 .1u;50V
C2 .1u;50V
C3 .1u;50V
FDBKN1 R7
R3 14K;1% C38 470p;50V
FBP1
U3 R5 8.2K R53 11K REF OCD0 VLO 15 16 17 18 19 V5 V5 1 R54 22K GND V5 VP1 IN1 R16 5K POT 2 MUTE BBM2 R4 500K BBM1 VP2 IN2 R18 500K C33 .1u;50V 3 20 21 22 23 24 25 26 27 28 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 R6 2K 1 Y2 Y2B Y1B Y1 HMUTE 2 FDBKN1 FDBKP1 Y2 Y2B Y1B Y1 OCD1
1.0K;1%
FDBKP1 D1 LED;RED 1.0K;1% R14 C39 470p;50V
R12 14K;1%
FBN1
C38, C39, C40, and C41 must be very close to U3.
A
C8 2.2u;10V;PCS2225CT-ND
IN1 VP1 V5 R23 20K For normal operation, ground J1 V5 2 Nets "IN1" and "IN2" must be very short. 1 3 J1 2 MUTE B3S FDBKN2 R22 R19 14K;1% C40 390p;50V FBP2
IN1
R21 20K
A
+
3 2 1 DUAL RCA:CP-1435-ND
R24 5K POT
1
JP1
1.0K;1%
R2 500K
R3, R7, R12, R14, R19, R22, R27, and R30 must be close to U3.
3
C27 .1u;50V C9 2.2u;10V;PCS2225CT-ND R26 500K FDBKP2 IN2 VP2 R31 20K 1.0K;1% R30 C41 390p;50V R27 14K;1% FBN2
IN2
+
R29 20K Title Size B Date: Document Number Monday, July 22, 2002
TK2051 EVAL BOARD
Rev
1.4
Sheet 2 of 3
1
1
V5 U2 IN1A IN1A IBIAS C12 .1u;50V R37 10K CONFIG PWRDN R40 10K C18 .1u;50V FAULT TRISTATE R45 10K C21 .1u;50V TH_WAR IN1B IN1B 28 30 VCC1B OUT1B M4 18 NC OUT1B GND1B 12 11 OUT1B 10 13 27 26 FAULT TRISTATE 29 23 24 25 IN1A IBIAS CONFIG PWRDN PROTECTION & LOGIC M2 GND1A M3 VCC1A OUT1A OUT1A 15 17 OUT1A 16 14
VCC
FBP1 L1 10.4uH;AMERICAN CORES/AMIDON AW600-06-40T-24-V OUT1P C10 .1u;50V C11 .47u;50V;P4671-ND
OUT1+
C15 .47u;63V;P4544-ND C17 .1u;100V;P4725-ND R42
VCC
10;1W
TH_WAR IN1B
M5
C22 .1u;50V L2 FBN1 FBP2 L3
C23 .47u;50V;P4671-ND 10.4uH;AMERICAN CORES/AMIDON AW600-06-40T-24-V
OUT1N
OUT1-
VCC IN2A VDD VDD VSS VSS C30 .1u;50V C31 .1u;50V 31 21 22 33 34 VCC2A OUT2A VDD VDD VSS VSS REGULATORS M15 GND2A OUT2A 7 8 OUT2A 9 6 C24 .1u;50V
IN2A
IN2A
M17
10.4uH;AMERICAN CORES/AMIDON AW600-06-40T-24-V OUT2P C25 .47u;50V;P4671-ND
A
OUT2+ A
C28 .47u;63V;P4544-ND C32 .1u;100V;P4725-ND R50 10;1W
VCCSIGN VCCSIGN
35 36 20 32 19 1
VCCSIGN VCCSIGN GNDREG IN2B GNDCLEAN GNDSUB TP2051 M14 M16 VCC2B OUT2B OUT2B GND2B 4 3 OUT2B 2 5 FBN2 L4 C35 .1u;50V C36 .47u;50V;P4671-ND VCC
C19 .1u;50V
GNDREG IN2B GNDCLEAN GNDSUB
IN2B
OUT2N 10.4uH;AMERICAN CORES/AMIDON AW600-06-40T-24-V
OUT2-
VCC
C37 680u;50V;P10330-ND
+ Title Size B Date:
TK2051 EVAL BOARD Document Number Monday, July 22, 2002 Sheet 3 of 3 Rev 1.4
1
TK2051 EVAL BOARD Revised 6/20/02 REVISION 1.4 Item Quantity Reference Part;Digi-Key number Package Info. Notes: ______________________________________________________________________________________________________________________ 1 18 C1,C2,C3,C5,C7,C10,C12, C18,C19,C20,C21,C22,C24, C27,C30,C31,C33,C35 C4 C8,C9 C11,C23,C25,C36 C28,C15 C17,C32 C37 C38,C39 C40,C41 D1 JP1 JP2,JP3 J1 J2,J3,J4,J5 L1,L2,L3,L4 R1 R2,R4,R18,R26 R3,R12,R19,R27 R5 R6 R7,R14,R22,R30 R16,R24 R21,R23,R29,R31 R37,R40,R45 R50,R42 R53 R54 U2 U3 .1u;50V CAP0805
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
1 2 4 2 2 1 2 2 1 1 2 1 4 4 1 4 4 1 1 4 2 4 3 2 1 1 1 1
100u;16V;P5529-ND 2.2u;10V;PCS2225CT-ND .47u;50V;P4671-ND .47u;63V;P4544-ND .1u;100V;P4725-ND 680u;50V;P10330-ND 470p;50V 390p;50V LED;RED DUAL RCA;CP-1435-ND CON4 B3S STANDOFF 10.4uH 0 500K 14K;1% 8.2K 2K 1.0K;1% 5K POT;3306P-502-ND 20K 10K 10;1W;P10W-1BK-ND 11K 22K TP2051 TC2000
Thru-hole CAP3612 Thru-hole Thru-hole Thru-hole Thru-hole CAP0805 CAP0805
4pin, 156Mil 3pin, 100Mil AMERICAN CORES/AMIDON AW600-06-40T-24-V RES0805 RES0805 RES0805 RES0805 RES0805 RES0805 RES0805 RES0805 Thru-hole RES0805 RES0805

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