TECHNICAL INFORMATION
Ω
Stereo 300W (4Ω) Class-T Digital Audio Amplifier Driver
using Digital Power Processing
TM
Technology
TA3020
PRELIMINARY – January 2001
General Description
The TA3020 is a two-channel, 300W (4Ω) per channel Amplifier Driver IC that uses Tripath’s
TM
proprietary Digital Power Processing (DPP ) 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
Features
!"Class-T
architecture
!"Proprietary
Digital Power Processing technology
!"“Audiophile”
Sound Quality
!"0.02%
THD+N @ 50W, 8Ω
!"0.03%
IHF-IM @ 30W, 8Ω
!"High
Efficiency
!"95%
@ 150W @ 8Ω
!"90%
@ 275W @ 4Ω
!"Supports
wide range of output power levels
!"Up
to 300W/channel (4Ω), single-ended outputs
!"Up
to 1000W (4Ω), bridged outputs
!"Output
over-current protection
!"Over-
and under-voltage protection
!"48-pin
DIP (dual-inline package)
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
Typical Performance
10
5
THD+N versus Output Power versus Supply Voltage
R
L
= 4Ω
f = 1kHz
BBM = 80nS
BW = 22Hz - 22kHz
39V
2
1
45V
54V
THD+N (%)
0.5
0.2
0.1
0.05
0.02
0.01
1
2
5
10
20
50
100
200
500
Output Power (W)
TA3020, Rev 2.1, 01.01
1
TECHNICAL INFORMATION
Absolute Maximum Ratings
(Note 1)
SYMBOL
VPP, VNN
V5
VN10
T
STORE
T
A
T
J
ESD
HB
ESD
MM
Supply Voltage
Positive 5 V Bias Supply
Voltage at Input Pins (pins 12-16, 18, 19-26, 29-33, 37)
Voltage for FET drive
Storage Temperature Range
Operating Free-air Temperature Range (Note 2)
Junction Temperature
ESD Susceptibility – Human Body Model (Note 3)
All pins
ESD Susceptibility – Machine Model (Note 4)
All pins
PARAMETER
Value
+/- 70
6
-0.3V to (V5+0.3V)
VNN+13
-55º to 150º
-40º to 85º
150º
TBD
TBD
UNITS
V
V
V
C
C
C
V
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: This is a target specification. Characterization is still needed to validate this temperature range.
Note 3: Human body model, 100pF discharged through a 1.5KΩ resistor.
Note 4: Machine model, 220pF – 240pF discharged through all pins.
Operating Conditions
(Note 5)
SYMBOL
VPP, VNN
V5
VN10
Supply Voltage
Positive 5 V Bias Supply
Voltage for FET drive (Volts above VNN)
PARAMETER
MIN.
+/- 15
4.5
9
TYP.
+/-45
5
10
MAX.
+/- 65
5.5
12
UNITS
V
V
V
Note 5: Recommended Operating Conditions indicate conditions for which the device is functional.
See Electrical Characteristics for guaranteed specific performance limits.
2
TA3020, Rev 2.1, 01.01
TECHNICAL INFORMATION
Electrical Characteristics
(Note 6)
T
A
= 25
°C.
See Application/Test Circuit on page 7. Unless otherwise noted, the supply voltage is
VPP=|VNN|=45V.
SYMBOL
I
q
PARAMETER
Quiescent Current
(No load, BBM0=1,BBM1=0,
Mute = 0V)
Mute Supply Current
(No load, Mute = 5V)
High-level input voltage (MUTE)
Low-level input voltage (MUTE)
High-level output voltage (HMUTE) I
OH
= 3mA
Low-level output voltage (HMUTE)
Output Offset Voltage
Over Current Sense Voltage
Threshold
VPPSENSE Threshold Currents
I
OL
= 3mA
No Load, MUTE = Logic low
0.1% R
FBA
, R
FBB
, R
FBC
resistors
TBD
Over-voltage turn on (muted)
Over-voltage turn off (mute off)
Under-voltage turn off (mute off)
Under-voltage turn on (muted)
Over-voltage turn on (muted)
Over-voltage turn off (mute off)
Under-voltage turn off (mute off)
Under-voltage turn on (muted)
Over-voltage turn on (muted)
Over-voltage turn off (mute off)
Under-voltage turn off (mute off)
Under-voltage turn on (muted)
Over-voltage turn on (muted)
Over-voltage turn off (mute off)
Under-voltage turn off (mute off)
Under-voltage turn on (muted)
-TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
1.0
162
154
79
72
TBD
TBD
TBD
TBD
174
169
86
77
TBD
TBD
TBD
TBD
4.0
0.5
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
CONDITIONS
VPP = +45V
VNN = -45V
V5 = 5V
VN10 = 10V
VPP = +45V
VNN = -45V
V5 = 5V
VN10 = 10V
3.5
1.0
MIN.
TYP.
90
90
45
200
1
1
20
1
MAX.
UNITS
mA
mA
mA
mA
mA
mA
mA
mA
V
V
V
V
mV
V
µA
µA
µA
µA
V
V
V
V
µA
µA
µA
µA
V
V
V
V
TBD
TBD
TBD
I
MUTE
V
IH
V
IL
V
OH
V
OL
V
OFFSET
I
OC
I
VPPSENSE
V
VPPSENSE
Threshold Voltages with
R
VPPSENSE
= XXKΩ
I
VNNSENSE
VNNSENSE Threshold Currents
V
VNNSENSE
Threshold Voltages with
R
VNNSENSE
= XXKΩ
Note 6: Minimum and maximum limits are guaranteed but may not be 100% tested.
TA3020, Rev 2.1, 01.01
3
TECHNICAL INFORMATION
Performance Characteristics – 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
P
OUT
PARAMETER
Output Power
(continuous RMS/Channel)
CONDITIONS
THD+N = 0.1%, R
L
= 8Ω
R
L
= 4Ω
THD+N = 1%,
R
L
= 8Ω
R
L
= 4Ω
P
OUT
= 50W/Channel, R
L
= 8Ω
19kHz, 20kHz, 1:1 (IHF), R
L
= 8Ω
P
OUT
= 30W/Channel
A Weighted, R
L
= 4Ω,
P
OUT
= 275W/Channel
0dBr = 30W, R
L
= 8Ω, f = 1kHz
P
OUT
= 150W/Channel, R
L
= 8Ω
P
OUT
= 10W/Channel, R
L
= 4Ω
See Application / Test Circuit
P
OUT
= 10W/Channel, R
L
= 4Ω
See Application / Test Circuit
A Weighted, no signal, input shorted,
DC offset nulled to zero
MIN.
TYP.
100
190
120
220
0.02
0.03
102
97
95
TBD
0.5
260
MAX.
UNITS
W
W
W
W
%
%
dB
dB
%
V/V
dB
µV
THD + N
IHF-IM
SNR
CS
η
A
V
A
VERROR
e
NOUT
Total Harmonic Distortion Plus
Noise
IHF Intermodulation Distortion
Signal-to-Noise Ratio
Channel Separation
Power Efficiency
Amplifier Gain
Channel to Channel Gain Error
Output Noise Voltage
4
TA3020, Rev 2.1, 01.01
TECHNICAL INFORMATION
TA3020 Pinout
48-pin Dip
(Top View)
VN10
LO2
LO2COM
HO2COM
HO2
OCS2LN
OCS2LP
OCS2HP
OCS2HN
VBOOT2
NC
OCR2
FBKOUT1
FBKGND1
HMUTE
FBKOUT2
DCOMP
FBKGND2
BIASCAP
INV2
OAOUT2
BBM0
BBM1
MUTE
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
LO1
LO1COM
HO1COM
HO1
OCS1HN
OCS1HP
OCS1LP
OCS1LN
VBOOT1
VNN
NC
OCR1
NC
V5
AGND
OCR1
REF1
OCR2
VNNSENSE
VPPSENSE
AGND
V5
OAOUT1
INV1
TA3020, Rev 2.1, 01.01
5
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