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PDF TP2050 Data sheet ( Hoja de datos )
| Número de pieza | TP2050 | |
| Descripción | STEREO 50W POWER STAGE | |
| Fabricantes | Tripath Technology | |
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Tripath Technology, Inc. - Technical Information
TP2050
STEREO 50W (8Ω) POWER STAGE
Technical Information
Revision 1.0 – July 2005
GENERAL DESCRIPTION
The TP2050 is a stereo power stage capable of 50W continuous average power per channel, Class-T
Digital Audio Power Amplifier using Tripath’s proprietary Digital Power ProcessingTM technology. The
TP2050 can be coupled with a Class-T controller such as TC2000 or TC2001 to produce a high
quality stereo amplifier.
APPLICATIONS
5.1-Channel DVD
Mini/Micro Component Systems
Home Theater
Stereo applications (6Ω / 8Ω)
Mono applications (4Ω)
BENEFITS
Single Supply Operation
Very High Efficiency
Wide Dynamic Range
Compact layout
FEATURES
Class-T Architecture
High Output power
35W @ 6Ω, < 1% THD+N
50W @ 8Ω, < 3% THD+N
117W @ 4Ω, < 10.0% THD+N (paralleled outputs)
Audiophile Quality Sound
0.007% THD+N @ 30W 8Ω
0.005% THD+N @ 70W 4Ω (paralleled outputs)
High Efficiency
92% @ 60W 8Ω
85% @ 46W 6Ω
89% @ 117W 4Ω (paralleled outputs)
Dynamic Range >100 dB
1 TP2050– KL/1.0/07.05
1 page  
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Tripath Technology, Inc. - Technical Information
APPLICATION / TEST DIAGRAMS
Inputs and TC2000 / TC2001
RREF
8.2K
V5
1
ROFB
5K
RCA_RT_ANG
J9
3
CI
2.2u;10V
1
1+
V5
IN1 2
21
ROFB
5K
2
RCA_RT_ANG
J10
3
ROFA
500K
COF
.1u;50V
RI
20K
ROFA
500K
COF
.1u;50V
1
1
+
CI
IN2 2
2.2u;10V
2
RI
20K
ROFA
500K
RF
20K
R54
22K
R53
11K
V5
1 JP 2
JUMPER
V5
ROFA
500K
RF
20K
V5 V5
CS
.1u;50V
+
CS
100u;16V
TP2050 and Outputs
15
REF
16
OCD0
17
VLO
18
OVRLDB
19 VHI
20
GND
OCD1
NC
Y2
Y2B
Y1B
Y1
HMUTE
14
13
12
11
10
9
8
21 V5
FDBKN1 7
22 VP1
23 IN1
TC2000 / TC2001
24 MUTE
FDBKP1 6
25
BBM2
26
BBM1
27 VP2
28
IN2
VPW R
FDBKN2
5
4
Y2
Y2B
Y1B
Y1
HMUTE
RFBB
1.0K;1%
RFBC
14K;1%
CFB
470p;50V
RFBB
1.0K;1%
RFBC
14K;1%
CFB
470p;50V
RFBB
1.0K;1%
RFBC
14K;1%
CFB
390p;50V
DCMP 3
FDBKP2
BIASCAP
2
1
C7
.1u;50V
RFBB
1.0K;1%
RFBC
14K;1%
CFB
390p;50V
OUT1A
OUT1B
OUT2A
OUT2B
V5
Y1
CS R37
.1u 10K
R40
10K
CS
.1u
CS
.1u
Y1B
U2
29 IN1A
23 IBIAS
24 CONFIG
25 PWRDN
27 FAULT
26 TRISTATE
P R O T E C T IO N
&
LO G IC
M3
M2
28
TH_WAR
30 IN1B
18
NC
TP2050
M5
M4
Y2 31 IN2A
M17
21 VDD
22 VDD
33 VSS
REGULATORS
M15
34 VSS
C
.1
uS
CS
.1u
35 VCCSIGN
CS 36 VCCSIGN
.1u 20 GNDREG
Y2B
32 IN2B
19 GNDCLEAN
M16
1 GNDSUB
M14
VCC1A 15
OUT1A 17
OUT1A 16
GND1A 14
VCC
OUT1A
LO
15u
CHBR
.1u;50V
CSN (note 1)
330p;100V;NPO
CO
.22u;50V
CZ
.22u;50V
VCC1B 12
OU T1B 11
OUT1B 10
GND1B 13
VCC2A 7
OUT2A 8
OUT2A 9
GND2A 6
VCC
CHBR
.1u;50V
RSN (note 1)
20;1/4W
LO
15u
RZ
15;1W
CO
.22u;50V
VCC
OUT1B
OUT2A
LO
15u
CHBR
.1u;50V
CSN (note 1)
330p;100V;NPO
CO
.22u;50V
CZ
.22u;50V
VCC2B 4
OUT2B 3
OUT2B 2
GND2B 5
VCC
CHBR
.1u;50V
RSN (note 1)
20;1/4W
LO
15u
RZ
15;1W
CO
.22u;50V
OUT2B
OUT1P
CCASE (note 2)
1000p;50V
CDM
.1u;100V
SPEAKER
CCASE (note 2)
1000p;50V
OUT1N
VCC
CHBR
560u;50V
+
OUT2P
CCASE (note 2)
1000p;50V
CDM
.1u;100V
SPEAKER
CCASE (note 2)
1000p;50V
OUT2N
NOTE 1: CSN/RSN are optional locations, loaded only if required to reduce overshoot
NOTE 2: CCASE (4 locations) represent bypass capacitors mounted at the exit of the speaker cable from the cabinet. They are optional and
are used for EMI supression. Lead lengths on these components must be kept short to be effective. They are shown in this schematic for
reference.
5 TP2050– KL/1.0/07.05
5 Page 
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Tripath Technology, Inc. - Technical Information
Output Filter Design
Tripath amplifiers generally have a higher switching frequency than PWM implementations, allowing
the use of higher cutoff frequency filters and reducing the load dependent peaking/drooping in the
20kHz audio band. This is especially important for applications where the end customer may attach
any speaker to the amplifier (as opposed to a system where speakers are shipped with the amplifier),
since speakers are not purely resistive loads and the impedance they present changes over
frequency and from speaker model to speaker model. An RC network, or “Zobel” (RZ, CZ) should be
placed at the filter output to control the impedance “seen” by the TP2050 when not attached to a
speaker load. The TP2050 works well with a 2nd order, 80kHz LC filter with LO = 10uH and CO =
0.47uF and RZ = 10 Ohm/1W and CZ = 0.47uF.
NOTE: Output inductor selection is a critical design step. The core material and geometry of the
output filter inductor affects the TP2050 distortion levels, efficiency, power dissipation and EMI output.
Please contact Tripath Applications for additional information about recommended inductor sources.
Protection Circuits
The TP2050 is protected against over-current, over / under-voltage and over-temperature conditions.
Over-temperature Protection
An over-temperature fault occurs if the junction temperature of the part exceeds approximately
150°C. The thermal hysteresis of the part is approximately 25°C, therefore the fault will automatically
clear when the junction temperature drops below 125°C.
Performance Measurements of the TK2050
The TP2050 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 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 TP2050 amplifier switching pattern will degrade the
measurement.
One feature of the TP2050 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 TP2050 Evaluation Board uses the Application/Test Circuit of 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.
11 TP2050– KL/1.0/07.05
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet TP2050.PDF ] | |
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