EB-TA1101B [TRIPATH]
Class-T Digital Audio Amplifier Evaluation Board using Digital Power ProcessingTM Technology; T类数字音频放大器评估使用数字电源ProcessingTM技术局
| 型号： | EB-TA1101B |
| 厂家： | 
TRIPATH TECHNOLOGY INC. |
| 描述： | Class-T Digital Audio Amplifier Evaluation Board using Digital Power ProcessingTM Technology |
| 文件： | 总9页 (文件大小：543K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Tripath Technology, Inc. - Technical Information
EB-TA1101B
Class-T Digital Audio Amplifier Evaluation Board using Digital
Power Processing TM Technology
T e c h n i c a l I n f o r m a t i o n
R e vi s i o n E – F e b r u a r y 2 0 0 1
G E N E R A L D E S C R I P T I O N
T he EB-T A1101B evaluation board is based on the T A1101B, digital audio power
amplifier from T r ipath T echnology. T he board is designed to provide a simple and
straightforward environment for the evaluat ion of the T r ipath T A1101B. T he board can
be connected to a + 12V supply using cables with banana connectors. Audio inputs are
standard RCA jacks. T he T A1101B provides amplification for two channels of audio.
Signal outputs are on four banana connectors to which any 4Ω o r 8Ω passive speaker
may be connected.
Features
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Efficiency - >85% @ full power (RL = 8Ω)
No heat sink required up to 10W per
channel
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Class-T architecture
Proprietary Digital Power Processing TM
Technology
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ꢀ
ꢀ
ꢀ
ꢀ
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Mute input
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Requires single +12V power source
Output Power (per channel @ VS = 12V):
Turn-on & turn-off pop suppression
Intelligent short-circuit protection
Intelligent over-temperature protection
Connects to any passive 4/8Ω speakers
Takes standard audio line output from
any sound system
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15W - 4Ω @ 10% THD+N
10W - 4Ω @ 0.1% THD+N
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Easy engineering evaluation platform for
Tripath Technology’s TA1101B product
“Audiophile performance” typically:
0.04% THD+N, 9Wrms @ 4Ω
ꢀ
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2-layer low cost board
30-pin Power SOP package
0.18% IHF-IM, 1Wrms @ 4Ω
1
EB-TA1101B, 02.01
Tripath Technology, Inc. - Technical Information
Introduction
The EB-TA1101B was designed to provide the designer with a simple means of evaluating the performance
and functionality of the TA1101B 2x10W amplifier IC from Tripath Technology. The EB-TA1101B is very
simple to operate and requires only a few things to get up and running:
Stereo signal source
12V power supply (not to exceed 13.2V)
Two loads (4-Ohm minimum)
For more information on the TA1101B, please refer to the TA1101B datasheet (www.tripath.com).
Power In
+12V(red), Gnd(blk)
In1
Output 1
Out1+(wht), Out1-(blu)
Inputs
Outputs
In2
Sleep
Output 2
Out2+(wht), Out2-(blu)
Mute
EB-TA1101B Board
Connection and Operation
Figure 1 shows the connections required for proper operation of the EB-TA1101B.
Input Connection
Audio input to the board is provided via two RCA female connectors.
Connector Name
IN1
IN2
Channel
Channel 1 Input
Channel 2 Input
Power Connection
The TA1101B requires a +12V power supply (13.2V max) to operate.
Power to the board is provided via the red and black female banana connectors. The positive 12V from the
power supply connects to the red banana connector labeled 12V+. The ground connection of power supply
attaches to the black banana connector labeled GND.
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EB-TA1101B, 02.01
Tripath Technology, Inc. - Technical Information
+12V
-
+
In1
In2
12V+
Out1+
Out2-
L
+
Gnd
Audio
Gnd
-
Source
Out1-
R
-
Sleep
Out2+
+
Figure 1
Connector Label Description
Color
Red
Black
12V+
GND
Positive of the 12V Power supply
Negative (GND) of 12V Power Supply
Warning: Do not exceed Maximum Operating Supply Voltage of 13.2V
Output Connection
There are four female banana connectors on the evaluation board for speaker output. The TA1101B has
differential outputs (bridged) so it requires two wires per channel to connect to each speaker.
Connector Label
Out1+
Out1-
Out2+
Out2-
Description
Color
White
Blue
White
Blue
Positive output of Channel 1
Negative output of Channel 1
Positive output of Channel 2
Negative output of Channel 2
Jumper Settings
There are two jumpers on the EB-TA1101B board, which should both be connected (shorted) for normal
operation. Jumper, J1 connects the FAULT output to the MUTE pin, allowing the part to Mute itself when a
Fault condition (over-current, etc.) is detected. Jumper, J2 connects the SLEEP pin to GND, effectively
disabling SLEEP for normal operation. If J2 is removed, the part will go into SLEEP mode.
Jumper
J1
Purpose
Connects FAULT to MUTE
Connects SLEEP to GND
J2
3
EB-TA1101B, 02.01
Tripath Technology, Inc. - Technical Information
Gain Settings
The TA1101B amplifier gain can be adjusted by modifying external resister values. R2 and R5 are used to
set the gain for Channel 1, while R4 and R6 set the gain for Channel 2.
The equation for the gain setting is:
Rf
Ri
AV = 12 ⋅
Where,
R371
R370
R372
R373
For channel 1: AV _ Ch1 = 12 ⋅
For channel 2: AV _ Ch2 = 12 ⋅
For a more detailed description, please refer to the TA1101B data sheet.
Performing Measurements on the EB-TA1101B
The TA1101B 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 TA1101B amplifier switching pattern will degrade the measurement.
One feature of the TA1101B 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 EB-
TA1101B Evaluation Board has a simple two-pole output filter with excellent performance in listening tests.
(See Application Note 4 for more information on bench testing with Tripath Class-T amplifiers)
EMI and Shielding
The TA1101B evaluation board has perforated holes around the amplifier and associated circuitry so that an
EMI shield can be soldered directly to the board. Due to the spread-spectrum nature of the Class-T amplifier
(the energy is spread across a wider spectrum, instead of being concentrated at a single frequency), we
have found that specific EMI shielding is typically not necessary for most applications where the amplifier
board is mounted inside a chassis. However, a shield perimeter is still provided for use in more sensitive
applications.
(See Application Note 11 for more information on EMI)
4
EB-TA1101B, 02.01
Tripath Technology, Inc. - Technical Information
CONTACT INFORMATION
World Wide Sales Offices
United States & Europe
SE Asia & China
Jim Hauer
Eugene Hsu
Osamu Ito
jhauer@tripath.com
ehsu@tripath.com
ito@tripath.com
408.567.3089
886.2.2653.7428
81.42.334.2433
Japan & Korea
T R I P A T H T E C H N O L O G Y , I N C
3900 Freedom Circle
Santa Clara
CA 95054
408.567.3000
www.tripath.com
5
EB-TA1101B, 02.01
Tripath Technology, Inc. - Technical Information
6
EB-TA1101B, 02.01
Tripath Technology, Inc. - Technical Information
7
EB-TA1101B, 02.01
1
VDD
+12V_PLANE
L5 FBM2125
12V+
12V+
GND
BN1
BN2
C21
1000pF
GND
L8
L6
10uH, 2A
RCA
J3
OUT1+
OUT1-
U1
L1
FBM2125
BN3
C8
IN1
IN2
1000pF
C27
C12
C16
VDD
0.47uF
0.47uF
1
2
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
DCAP2
DCAP1
V5D
+5GEN
CPUMP
PGND1
VDDA
C23
100pF
TA1101B
C5
C29
0.1uF
0.1uF
1uF
D5
R9
10, 1/4W
3
MBRS130T3
C10
1000pF
C17
1uF
VDD
10uH, 2A
4
AGND1
REF
R7 8.2K, 1%
5
NC
C18
BN4
6
+
OVERLOADB
AGND2
V5A
OUTP1
VDD1
C7
0.1uF
VDD
C28
180uF,25V
OVERLOADB
0.47uF
7
8
OUTM1
OUTM2
VDD2
20k
R5
D6
MBRS130T3
9
VP1
C14 2.2uF
20k
R2
VDD
A
D7
10
11
12
13
14
15
IN1
MBRS130T3
+
MUTE
VP2
OUTP2
DGND
PGND2
FAULT
SLEEP
20k
R6
C6
0.1uF
C19
RCA
J4
L2 FBM2125
20k
R4
180uF,25V
IN2
C15
2.2uF
BIASCAP
AGND3
C24
100pF
C26
0.1uF
D8
MBRS130T3
L7
L9
10uH, 2A
OUT2-
OUT2+
VDD
C9
1000pF
BN5
BN6
J1
C25
C13
0.47uF
0.47uF
MUTE
FAULT
R1
JUMPER
1Meg
C30
0.1uF
R10
C11
1000pF
10, 1/4W
10uH, 2A
J2
C20
NOTES:
0.1uF
1. TA1101B inputs have a DC bias of 2.5V. If input preamp circuitry is NOT biased at 0V,
C14 and C15 may need to be reversed.
C22
0.47uF
2. The MUTE function can be optionally tied to the FAULT pin to allow for an automatic
reset in the event of an over current FAULT.
3 sq. in. of 1oz. copper directly under TA1101B on
Tripath Technology, Inc.
solder side of PC board with a 5 x 16 array of 14mil vias.
Title
TA1101B Evaluation Board
Size
B
Document Number
Rev
E
http://www.tripath.com
Date:
Monday, February 12, 2001
Sheet
1
of
1
1
EB-TA1101B Revision: E
Bill Of Materials
Quantity
Reference
Value
Description
Mfgr/Part#
COMMENT
2
1
4
1
R10,R9
10, 1/4W
8.2K, 1%
20k
Resistor
Resistor
Resistor
Resistor
Zobel resistor
Feedback resistor
R7
R2, R4, R5, R6
R1
1Meg
7
6
5
2
2
2
2
C6,C7,C16,C20,C26, C29, C30
C12, C13, C22,C25,C27,C28
C8,C9,C10,C11,C21
C23,C24
0.1uF
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
0.47uF
1000pF
100pF
180uF,25V
1uF
main output filter cap
C18,C19
Panasonic
HFQ
Low ESR, high temp aluminum elect.
Input coupling cap
C17,C5
C15,C14
2.2uF
4
3
L6,L7,L8,L9
L1,L2,L5
10uH, 2A
FBM2125
Inductor
ISI RL622
or TOKO 8RDY
Output series inductor.
Ferrite bead
Taiyo-yuden
FBMJ2125 HM330-T Ferrite bead, 33ohms (100MHz)
4
1
D5,D6,D7,D8
U1
MBRS130T3
TA1101B
Diode
IC
On Semi
Tripath
MBRS130T3
TA1101B
Output protection diode
6
2
2
BN1, BN2, BN3, BN4, BN5, BN6
Connector
Connector
Header
Johnson Components
101-09XX-001
PCB mount female banana
RCA input jack
J3, J4
J1, J2
Header, 2-pin 0.1"
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