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PDF TA1101B Data sheet ( Hoja de datos )
| Número de pieza | TA1101B | |
| Descripción | Digital Audio Amplifier using Digital Power Processing | |
| Fabricantes | ETC | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de TA1101B (archivo pdf) en la parte inferior de esta página. Total 13 Páginas | ||
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TECHNICAL INFORMATION
Stereo 10W (4Ω) Class-T™ Digital Audio Amplifier using
Digital Power Processing™ Technology
TA1101B
September 2000
General Description
The TA1101B is a 10W continuous average two-channel Class-T Digital Audio Power
Amplifier IC using Tripath’s proprietary Digital Power Processing™ technology. Class-T
amplifiers offer both the audio fidelity of Class-AB and the power efficiency of Class-D
amplifiers.
Applications
!"Computer/PC Multimedia
!"DVD Players
!"Cable Set-Top Products
!"Televisions
!"Video CD Players
!"Battery Powered Systems
Benefits
!"Fully integrated solution with FETs
!"Easier to design-in than Class-D
!"Reduced system cost with no heat sink
!"Dramatically improves efficiency versus
Class-AB
!"Signal fidelity equal to high quality linear
amplifiers
!"High dynamic range compatible with digital
media such as CD, DVD, and Internet audio
Features
!"Class-T architecture
!"Single Supply Operation
!"“Audiophile” Quality Sound
!"0.04% THD+N @ 9W, 4Ω
!"0.18% IHF-IM @ 1W, 4Ω
!"6W @ 8Ω, 0.1% THD+N
!"11W @ 4Ω, 0.1% THD+N
!"High Power
!"10W @ 8Ω, 10% THD+N
!"15W @ 4Ω, 10% THD+N
!"High Efficiency
!"88% @ 10W, 8Ω
!"81% @ 15W, 4Ω
!"Dynamic Range = 102 dB
!"Mute and Sleep inputs
!"Turn-on & turn-off pop suppression
!"Over-current protection
!"Over-temperature protection
!"Bridged outputs
!"30-pin Power SOP package
Typical Performance
THD+N versus Output Power
10
VDD = 12V
5 f = 1kHz
Av = 12
BW = 22Hz - 22kHz
2
1
0.5
0.2
0.1 RL= 8Ω
0.05
0.02
0.01
500m
1
25
Output Power (W)
RL= 4Ω
10 20
TA1101B, Rev. 2.2, 08.17.00
1
1 page  
TECHNICAL INFORMATION
TA1101B
CI
2.2uF
+
RF
20KΩ
RI
20KΩ
VP1 9
IN1 10
CA
0.1uF
BIASCAP 14
(Pin 7)
5V
MUTE 11
5V
Processing
&
Modulation
CI
2.2uF
+
RF
20KΩ
VP2 12
IN2 13
RI
20KΩ
5 REF
(Pin 7)
RREF
8.25KΩ, 1%
+12V
CD
0.1uF
1megΩ
2 DCAP1
1 DCAP2
16 SLEEP
Processing
&
Modulation
0.1uF
26 NC
5V
To Pin 30
CS
0.1uF
CS
0.1uF
3
V5D
4 AGND1
8
V5A
7 AGND2
15 AGND3
VDD1
25 OUTP1
Lo
10uH, 2A
PGND1
VDD1
DO
(Pin 28)
(Pin 28)
*Co
0.47uF
23 OUTM1
DO
PGND1 (Pin 28)
Lo
10uH, 2A
17
FAULT
6 OVERLOADB
VDD2
*Co
0.47uF
20 OUTP2
Lo
10uH, 2A
CZ
0.47uF
CCM
0.1uF
RZ
10Ω, 1/2W
PGND2
VDD2
DO
(Pin 18)
22 OUTM2
PGND2
DO
(Pin 18)
(Pin 18)
Lo
10uH, 2A
*Co
0.47uF
CZ
0.47uF
*Co
0.47uF
RZ
10Ω, 1/2W
CCM
0.1uF
CPUMP 29
VDDA 27
DGND 19
5VGEN 30
VDD1 24
PGND1 28
VDD2 21
18
PGND2
+ CP
1uF
CS
0.1uF
CS
0.1uF
To Pin 3,8
CSW
0.1uF
+
CSW
180uF, 16V
CSW
0.1uF
+ CSW
180uF, 16V
VDD (+12V)
RL
4Ω or *8Ω
RL
4Ω or *8Ω
Note: Analog and Digital/Power Grounds must
be connected locally at the TA1101B
Analog Ground
Digital/Power Ground
All Diodes Motorola MBRS130T3
* Use Co = 0.22µF for 8 Ohm loads
TA1101B, Rev. 2.2, 08.17.00
5
5 Page 
TECHNICAL INFORMATION
Performance Measurements of the 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 (external to the Tripath amplifier) that recovers an amplified version
of the audio input. The frequency of the switching pattern is spread spectrum and typically varies between
100kHz and 1.0MHz, 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 Tripath 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 TA1101B Evaluation Board uses the Test/Application Circuit in this data sheet, which has a
simple two-pole output filter and excellent performance in listening tests. Measurements in this data sheet
were taken using this same circuit with a limited bandwidth setting in the measurement instrument.
TA1101B, Rev. 2.2, 08.17.00
11
11 Page | ||
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| PDF Descargar | [ Datasheet TA1101B.PDF ] | |
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