T r i p a t h T e c h n o l o g y, I n c . - T e c h n i c a l I n f o r m a t i o n
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TK2350, Rev 1.5/09.03
TK2350
STEREO 300W (4) CLASS-T DIGITAL AUDIO AMPLIFIER DRIVER
USING DIGITAL POWER PROCESSING
T M
TECHNOLOGY
T e c h n i c a l I n f o r m a t i o n R e v i s i o n 1 . 5 S e p t e m b e r 2 0 0 3
GENERAL DESCRIPTION
The TK2350 (TC2001/TP2350B chipset) is a two-channel, 300W (4
) per channel Amplifier Driver that uses
Tripath's proprietary Digital Power Processing (DPP
TM
) technology. Class-T amplifiers offer both the audio
fidelity of Class-AB and the power efficiency of Class-D amplifiers.
Applications
Audio/Video Amplifiers & Receivers
Pro-audio Amplifiers
Automobile Power Amplifiers
Subwoofer Amplifiers
Benefits
Reduced system cost with smaller/less
expensive power supply and heat sink
Signal fidelity equal to high quality Class-AB
amplifiers
High dynamic range compatible with digital
media such as CD and DVD
Features
Class-T architecture
Pin compatible with Tripath TK2150
Proprietary Digital Power Processing technology
"Audiophile" Sound Quality
0.02% THD+N @ 50W, 8
0.03% IHF-IM @ 30W, 8
High Efficiency
95% @ 150W @ 8
90% @ 275W @ 4
Supports wide range of output power levels
Up to 300W/channel (4
), single-ended
outputs
Up to 1000W (4
), bridged outputs
Output over-current protection
Over- and under-voltage protection
Over-temperature protection
Typical Performance for TK2350
0.01
10
0.02
0.05
0.1
0.2
0.5
1
2
5
1
500
2
5
10
20
50
100
200
54V
Output Power (W)
THD+N (%)
39V
45V
THD+N versus Output Power versus Supply Voltage
R
L
= 4
f = 1kHz
BBM = 80nS
BW = 22Hz - 22kHz
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TK2350, Rev 1.5/09.03
Absolute Maximum Ratings TC2001
(Note 1)
SYMBOL PARAMETER
Value
UNITS
V
5
5V Power Supply
6
V
Vlogic Input
Logic
Level
V
5
+0.3V V
TA
Operating Free-air Temperature Range
-40 to +85
C
T
STORE
Storage Temperature Range
-55 to 150
C
T
JMAX
Maximum Junction Temperature
150
C
ESD
HB
ESD Susceptibility Human Body Model (Note 2)
All pins
2000
V
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur.
See the table below for Operating Conditions.
Note 2: Human body model, 100pF discharged through a 1.5K
resistor.
Absolute Maximum Ratings TP2350B
(Note 3)
SYMBOL PARAMETER
Value
UNITS
VPP, VNN
Supply Voltage
+/- 70
V
VN10
Voltage for FET drive
VNN+13
V
T
STORE
Storage Temperature Range
-55 to 150
C
T
A
Operating Free-air Temperature Range
-40 to 85
C
T
J
Junction
Temperature
150
C
ESD
HB
ESD Susceptibility Human Body Model (Note 4)
All pins
2000
V
ESD
MM
ESD Susceptibility Machine Model (Note 5)
All pins
200
V
Note 3: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur.
See the table below for Operating Conditions.
Note 4: Human body model, 100pF discharged through a 1.5K
resistor.
Note 5: Machine model, 220pF 240pF discharged through all pins.
Operating Conditions TC2001
(Note 6)
SYMBOL PARAMETER MIN.
TYP.
MAX.
UNITS
V5
Supply Voltage
4.5
5
5.5
V
V
HI
Logic
Input
High
V5-1.0
V
V
LO
Logic
Input
Low
1
V
T
A
Operating Temperature Range
-40
25
85
C
Note 6: Recommended Operating Conditions indicate conditions for which the device is functional.
See Electrical Characteristics for guaranteed specific performance limits.
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TK2350, Rev 1.5/09.03
Operating Conditions TP2350B
(Note 7)
SYMBOL PARAMETER MIN.
TYP.
MAX.
UNITS
VPP, VNN
Supply Voltage
+/- 15
+/-45
+/- 65
V
VN10
Voltage for FET drive (Volts above VNN)
9
10
12
V
Note 7: Recommended Operating Conditions indicate conditions for which the device is functional.
See Electrical Characteristics for guaranteed specific performance limits.
Operating Characteristics TC2001
(Note 8)
SYMBOL PARAMETER MIN.
TYP.
MAX.
UNITS
I5
Supply Current
50
mA
fsw Switching
Frequency
650
kHz
V
IN
Input
Sensitivity
0
1.5
V
V
OUTHI
High Output Voltage
V5-0.5
V
V
OUTLO
Low Output Voltage
100
mV
R
IN
Input
Impedance
2
k
Input
DC
Bias
2.4
V
Note 8: Recommended Operating Conditions indicate conditions for which the device is functional.
See Electrical Characteristics for guaranteed specific performance limits.
Thermal Characteristics TC2001
SYMBOL PARAMETER
Value
UNITS
JA
Junction-to-ambient Thermal Resistance (still air)
80
C/W
Thermal Characteristics TP2350B
SYMBOL PARAMETER
Value
UNITS
JC
Junction-to-case Thermal Resistance (Note 9)
3
C/W
Note 9: Recommended Operating Conditions indicate conditions for which the device is functional.
See Electrical Characteristics for guaranteed specific performance limits.
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TK2350, Rev 1.5/09.03
Electrical Characteristics TC2001
(Note 10)
T
A
= 25
C. See Application/Test Circuit on page 7. Unless otherwise noted, the supply voltage is
VPP=|VNN|=45V.
SYMBOL PARAMETER
CONDITIONS MIN.
TYP.
MAX.
UNITS
I
q
Quiescent Current
(Mute = 0V)
V5 = 5V
45
60
mA
I
MUTE
Mute Supply Current
(Mute = 5V)
V5 = 5V
20
25 mA
V
IH
High-level input voltage (MUTE)
3.5
V
V
IL
Low-level input voltage (MUTE)
1.0
V
V
OH
High-level output voltage (HMUTE) I
OH
= 3mA
4.0
V
V
OL
Low-level output voltage (HMUTE) I
OL
= 3mA
0.5
V
V
TOC
Over Current Sense Voltage
Threshold
TBD 0.85
0.97
1.09
V
I
VPPSENSE
VPPSENSE Threshold Currents
Over-voltage turn on (muted)
Over-voltage turn off (mute off)
Under-voltage turn off (mute off)
Under-voltage turn on (muted)
138
62
162
154
79
72
178
87
A
A
A
A
V
VPPSENSE
Threshold Voltages with
R
VPPSENSE
= 422K
(Note 11, Note 12)
Over-voltage turn on (muted)
Over-voltage turn off (mute off)
Under-voltage turn off (mute off)
Under-voltage turn on (muted)
57.6
25.9
68.4
65.0
33.3
30.4
75.8
37.1
V
V
V
V
I
VNNSENSE
VNNSENSE Threshold Currents
Over-voltage turn on (muted)
Over-voltage turn off (mute off)
Under-voltage turn off (mute off)
Under-voltage turn on (muted)
152
65
174
169
86
77
191
95
A
A
A
A
V
VNNSENSE
Threshold Voltages with
R
VNNSENSE
= 392K
(Note 11, Note 12)
Over-voltage turn on (muted)
Over-voltage turn off (mute off)
Under-voltage turn off (mute off)
Under-voltage turn on (muted)
-59.0
-25.2
-68.2
-66.2
-33.7
-30.2
-75.6
-37.6
V
V
V
V
Note 10: Minimum and maximum limits are guaranteed but may not be 100% tested.
Note 11: These supply voltages are calculated using the IVPPSENSE and IVNNSENSE values shown in the Electrical
Characteristics table. The typical voltage values shown are calculated using a RVPPSENSE and RVNNSENSE value
of 422kohm without any tolerance variation. The minimum and maximum voltage limits shown include either a +1% or
1% (+1% for Over-voltage turn on and Under-voltage turn off, -1% for Over-voltage turn off and Under-voltage turn on)
variation of RVPPSENSE or RVNNSENSE off the nominal 422kohm and 392kohm values. These voltage
specifications are examples to show both typical and worst case voltage ranges for a given RVPPSENSE and
RVNNSENSE resistor values of 422kohm and 392kohm. Please refer to the Application Information section for a more
detailed description of how to calculate the over and under voltage trip voltages for a given resistor value.
Note 12: The fact that the over-voltage turn on specifications exceed the absolute maximum of +/-70V for the TK2350 does not
imply that the part will work at these elevated supply voltages. It also does not imply that the TK2350 is tested or
guaranteed at these supply voltages. The supply voltages are simply a calculation based on the process spread of the
IVPPSENSE and IVNNSENSE currents (see note 7). The supply voltage must be maintained below the absolute
maximum of +/-70V or permanent damage to the TK2350 may occur.
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TK2350, Rev 1.5/09.03
Electrical Characteristics TK2350
(Note 14)
T
A
= 25
C. See Application/Test Circuit on page 7. Unless otherwise noted, the supply voltage is
VPP=|VNN|=45V.
SYMBOL PARAMETER
CONDITIONS MIN.
TYP.
MAX.
UNITS
I
q
Quiescent Current
(No load, BBM0=1,BBM1=0,
Mute = 0V)
VPP = +45V
VNN = -45V (using external VN10)
VNN = -45V (using SMPSO pin to
drive IRF9510 for generating VN10)
VN10 = 10V
90
90
TBD
200
TBD
mA
mA
mA
mA
I
MUTE
Mute Supply Current
(No load, Mute = 5V)
VPP = +45V
VNN = -45V
VN10 = 10V
1
1
1
mA
mA
mA
Note 14: Minimum and maximum limits are guaranteed but may not be 100% tested.
Performance Characteristics TK2350 Single Ended
T
A
= 25
C. Unless otherwise noted, the supply voltage is VPP=|VNN|=45V, the input frequency is 1kHz and the
measurement bandwidth is 20kHz. See Application/Test Circuit.
SYMBOL PARAMETER
CONDITIONS MIN.
TYP.
MAX.
UNITS
P
OUT
Output
Power
(continuous Power/Channel)
THD+N = 0.1%, R
L
= 8
R
L
= 4
THD+N = 1%, R
L
= 8
R
L
= 4
100
190
120
220
W
W
W
W
THD + N Total Harmonic Distortion Plus
Noise
P
OUT
= 50W/Channel, R
L
= 8
0.02 %
IHF-IM
IHF Intermodulation Distortion
19kHz, 20kHz, 1:1 (IHF), R
L
= 8
P
OUT
= 30W/Channel
0.03 %
SNR Signal-to-Noise
Ratio
A Weighted, R
L
= 4
,
P
OUT
= 275W/Channel
102 dB
CS Channel
Separation
0dBr = 30W, R
L
= 8
, f = 1kHz
97 dB
Power Efficiency
P
OUT
= 150W/Channel, R
L
= 8
95 %
A
V
Amplifier
Gain
P
OUT
= 10W/Channel, R
L
= 4
See Application / Test Circuit
10.7 V/V
A
VERROR
Channel to Channel Gain Error
P
OUT
= 10W/Channel, R
L
= 4
See Application / Test Circuit
0.5
dB
e
NOUT
Output Noise Voltage
A Weighted, no signal, input shorted,
DC offset nulled to zero
260
V
V
OFFSET
Output Offset Voltage
No Load, Mute = Logic Low
0.1% R
FBA
, R
FBB
, R
FBC
resistors
-1.0 1.0 V
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