Tri path Technol og y, I nc. - Techni cal I nformati on
TAA4100A
FOUR CHANNEL CLASS-T DIGITAL AUDIO AMPLIFIER USING
DIGITAL POWER PROCESSING (DPP
T M
) TECHNOLOGY
Technical Information
Revision 1.0 – November 2005
GENERAL DESCRIPTION
The TAA4100A is a four-channel Audio Amplifier 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. The TAA4100A has been designed specifically for
automotive head unit applications and is configured with four bridged outputs operating on a single
10-26V supply.
APPLICATIONS
FEATURES
Automotive Head Units
Automotive Amplifiers
DVD Receivers
Multimedia Speaker Systems
BENEFITS
4-channel (400W) solution – with integrated
FETs - in a single 32-pin SSIP package
High fidelity, high efficiency Class-T
Low external component count
Single-supply operation
C lass- T architec ture
Four H-Bridge outputs
“Audiophile” Sound Quality
High Efficiency
High Power @25.0V
100W
sat. sq. wave
@ 4Ω
80W @ 4Ω, 10% THD+N
“Audiophile” Quality Sound
0.01% THD+N @ 40W 4Ω
0.01% IHF-IM @ 1W 4Ω
High Efficiency
88% @ 100W 4Ω
Two ohm stable for automotive battery
voltage range
AM “Low EMI” mode
Pop-Free startup and shutdown
High Dynamic Range
Mute and Stand-By function
Automatic DC Offset Trim
Clip Detection Output
Protection Modes:
Output Short to VPP and Ground
Output Short across Load
Load Dump Protection
Over-/Under-Voltage Protection
Over-current Protection
Over-temperature Protection
Fortuitous Open Ground
1
TAA4100A – KL/ Rev. 1.0/11.05
Tri path Technol og y, I nc. - Techni cal I nformati on
Absolute Maximum Ratings
(Note 1)
SYMBOL
VPP
VPP
MAX
VPP
AM
VIN
RANGE
T
STORE
I
R
Tj
P
D
ESD
ESD
Supply Voltage
Peak Supply Voltage (t<50ms)
Supply Voltage in AM Mode (Note 2)
Voltage Range for Input Section Pins (Note 3)
Inputs (Pins 1-4, 6-9)
Storage Temperature Range
Repetitive Peak Output Current
Maximum Junction Temperature
Total Power Dissipation (Tcase = 70ºC)
ESD Susceptibility - Human Body Model (Note 4)
ESD Susceptibility – Machine Model (Note 5)
PARAMETER
Value
33
60
18
-0.5 to 5.5
-55 to +150
14
150
80
2k
200
UNITS
V
V
V
V
ºC
A
ºC
W
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: Supply voltage is limited in AM Mode due to additional power dissipation of output stage when
operating in Class B mode. Please note that the TAA4100A is still fully protected from load dump transients in AM
Mode.
Note 3
: The in
put section pins (pins 1-9, 11,12) should not be connected to voltages over 5.5V with respect to pin 10
(AGND). Please note that pins 5, 11, and 12 are outputs and can be damaged if a voltage is forced externally.
Note 4: Human body model, 100pF discharged through a 1.5KΩ resistor.
Note 5: Machine model, 220pF – 240pF discharged through all pins.
Operating Conditions
(Note 6)
SYMBOL
VPP
VPP
AM
T
A
Supply Voltage (Note 6)
Supply Voltage for AM Mode (Note 7)
Operating Free Air Temperature Range
PARAMETER
MIN.
10
10
-40
TYP.
14.4
14.4
25
MAX.
26
16
85
UNITS
V
V
ºC
Note 6: Recommended Operating Conditions indicate conditions for which the device is functional.
See Electrical Characteristics for guaranteed specific performance limits.
Note 7: Supply voltage is limited in AM Mode due to additional power dissipation of output stage when
operating in Class B mode, as opposed to Switching Mode.
Thermal Characteristics
SYMBOL
θ
JC
θ
JA
PARAMETER
Junction-to-case Thermal Resistance
Junction-to-ambient Thermal Resistance (still air)
Value
1.0
°
20
°
UNITS
C/W
C/W
2
TAA4100A – KL/ Rev. 1.0/11.05
Tri path Technol og y, I nc. - Techni cal I nformati on
Electrical Characteristics
(Note 8)
T
A
= 25
°
C. Unless otherwise noted, the supply voltage is VPP = 14.4V. See Application/Test Circuit.
SYMBOL
R
IN
I
Q
I
STBY
V
IL
V
IH
V
IL
V
IH
VOS
V
OH
V
OL
V
IH
V
IL
I
AM
PARAMETER
Input Impedance
Quiescent Current
Stand-By Current
Stand-By On Threshold Voltage
Stand-By Off Threshold Voltage
Mute-On Threshold Voltage
Mute-Off Threshold Voltage
Output Offset Voltage
No load
V
SLEEPB
< 0.15V
SLEEPB Low (amp off)
SLEEPB High (amp on)
MUTEB pin Low
MUTEB pin High
(Mute Off) DC trim active
3.5
1
2.3
1
1
2.3
+3
+25
2.3
1
Conditions
MIN.
43
TYP.
50
220
100
MAX.
57
250
200
0.5
UNITS
kΩ
mA
uA
V
V
V
V
mV
V
V
V
V
µA
Fault Reporting Logic Output High Voltage Open Drain Output
Fault Reporting Logic Output Low Voltage
AM Mode On Threshold Voltage
AM Mode Off Threshold Voltage
AM Mode Pin Input Current
R
FAULT
= 51KΩ
AM pin High
AM pin Low
Note 8: Minimum and maximum limits are guaranteed but may not be 100% tested.
Performance Characteristics
(Note 8)
T
A
= 25
°
C. Unless otherwise noted, the supply voltage is VPP = 14.4V, R
L
= 4Ω. Measurement
Bandwidth = 20kHz. See Application/Test Circuit.
SYMBOL
P
OUT
PARAMETER
Output Power
(Continuous power/ channel)
CONDITIONS
VPP=25V sat. sq. wave
VPP=25V THD+N=10%
VPP=25V THD+N=1%
VPP=14.4V sat. sq. wave, R
L
= 2Ω
VPP=14.4V THD+N=10%, R
L
= 2Ω
VPP=14.4V THD+N=1%, R
L
= 2Ω
VPP=14.4V sat. sq. wave
VPP=14.4V THD+N=10%
VPP=14.4V THD+N=1%
28.7
P
OUT
= 10W/Channel, R
L
= 4Ω
BW = 22Hz-20kHz(AES17)
19kHz, 20kHz, 1:1 (IHF)
P
OUT
= 1W/Channel
A-Weighted, P
OUT
= 100W/Channel,
VPP=25V
VPP=14.4V, Ripple=200mV, f= 1kHz
Vs=25.0V, 4 x 100W sat sq wave
Po=1W, f = 1kHz
Po=1W, f = 10kHz
A-Weighted
MIN.
TYP.
105
80
65
62
45
36
40
28
22
29.7
0.01
0.01
100
60
88
80
65
180
220
MAX.
UNITS
W
W
W
W
W
W
W
W
W
dB
%
%
dB
dB
%
dB
dB
µV
A
V
THD + N
IHF-IM
SNR
PSRR
η
CS
e
nOUT
Voltage Gain V
OUT
/V
IN
, R
IN
= 0Ω
Total Harmonic Distortion Plus
Noise
IHF Intermodulation Distortion
Signal-to-Noise Ratio
Power Supply Rejection Ratio
Power Efficiency
Channel Separation
Output Noise Voltage
30.7
3
TAA4100A – KL/ Rev. 1.0/11.05
Tri path Technol og y, I nc. - Techni cal I nformati on
AM Mode
(Note 9)
T
A
= 25
°
C. Unless otherwise noted, the supply voltage is VPP = 14.4V, R
L
= 4Ω. Measurement
Bandwidth = 20kHz. See Application/Test Circuit.
.
SYMBOL
I
OCD
THD+N
SNR
Pout
CS
en
PARAMETER
Over-current detect
Total Harmonic Dist plus Noise
Signal to Noise ratio
Output Power (Note 7)
Channel Separation
Output Noise Voltage
Po=0.5-5W per channel
A-Weighted, Po=15W
VPP=16V, THD+N=10%
VPP=14.4V, THD+N=10%
Po=1W, f=1kHz
A-Weighted
CONDITIONS
MIN.
5.5
0.04
92.5
20
16
80
180
220
TYP.
MAX.
UNITS
A
%
dB
W
W
dB
µV
Note 9: The TAA4100A heat sinking in AM Mode must be increased (as compared to Class T mode) to sustain the
typical output numbers. This is due to the lower efficiency of Class B output stage operation. Please note that the
AM Mode operating supply range, due to this increased power dissipation, is 10V-16V.
T
A
= 25
°
C. Unless otherwise noted, the supply voltage is VPP = 14.4V.
SYMBOL
OV
ON
OV
OFF
UV
OFF
UV
ON
OT
ON
OT
OFF
I
OC
VP
MAX
PARAMETER
Over-voltage Threshold
Over-voltage Reset
Under-voltage Reset
Under-voltage Threshold
Over-Temperature Threshold
Over-Temperature Reset
Over-Current Detect
Load Dump Voltage Withstand
CONDITIONS
Over-voltage turn on (amp muted)
Over-voltage turn off (mute off)
Under-voltage turn off (mute off)
Under-voltage turn on (amp muted)
Over-temperature turn on (amp
muted)
Over-temperature turn off (mute off)
1kHz single-shot ramp, VPP = 25V
Test conditions, t
r
> 2.5ms,
t
pulse
<50mS
7.8
150
120
10.5
60
MIN.
27.0
26.0
TYP.
30
28.0
9.5
8.1
160
130
12.5
10.0
8.6
170
140
MAX.
32.5
UNITS
V
V
V
V
°
C
°
C
Protection Circuits
(Note 8)
A
V
4
TAA4100A – KL/ Rev. 1.0/11.05
5
IN1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
IN2
IN3
IN4
BIASCAP
SLEEPB
AM
OVRLDB
MUTEB
AGND1
5VGEN
HMUTEB
VPPA
AGND2
CPUMP
OUT4P
VPP4
PGND
OUT4N
OUT3N
VPP3
OUT3P
FAULT
OUT2P
VPP2
OUT2N
OUT1N
PGND
VPP1
OUT1P
DCAP
PGND
TAA4100A Pinout
Note: The heat slug of the TAA4100A is connected to PGND.
32-pin SSIP Package
(Top View)
25
26
27
28
29
30
31
32
Tri path Technol og y, I nc. - Techni cal I nformati on
TAA4100A – KL/ Rev. 1.0/11.05
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