TA2041A Tripath Technology Inc., TA2041A Datasheet

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TA2041A

Manufacturer Part Number
TA2041A
Description
FOUR CHANNEL CLASS-T DIGITAL AUDIO AMPLIFIER USING DIGITAL POWER PROCESSING (DPPTM ) TECHNOLOGY
Manufacturer
Tripath Technology Inc.
Datasheet

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TA2041A
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TA2041A
FOUR CHANNEL CLASS-T DIGITAL AUDIO AMPLIFIER USING
DIGITAL POWER PROCESSING (DPP
G E N E R A L D E S C R I P T I O N
The TA2041A is a four-channel Audio Amplifier that uses Tripath’s proprietary Digital Power
Processing (DPP
power efficiency of Class-D amplifiers. The TA2041A has been designed specifically for automotive
head unit applications and is configured with four bridged outputs operating on a single 10-21V
supply.
A P P L I C A T I O N S
B E N E F I T S
1
T e c h n i c a l I n f o r m a t i o n
Automotive Head Units
DVD Receivers
Multimedia Speaker Systems
4-channel (280W) solution – with integrated
FETs - in a single 32-pin SSIP package
High fidelity, high efficiency Class-T
Low external component count
Single-supply operation
TM
) technology. Class-T amplifiers offer both the audio fidelity of Class-AB and the
F E A T U R E S
C lass- T architec ture
Four H-Bridge outputs
“Audiophile” Sound Quality
High Efficiency
High Power @20.0V
High Efficiency
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:
“Audiophile” Quality Sound
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
70W
50W @ 4Ω, 10% THD+N
0.04% THD+N @ 27W 4Ω
0.02% IHF-IM @ 5W 4Ω
86% @ 70W 4Ω
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
T M
sat. sq. wave
) TECHNOLOGY
@ 4Ω
TA2041A – KL/ Rev. 5.4/04.05
R e v i s i o n 5 . 4 – A p r i l 2 0 0 5

Related parts for TA2041A

TA2041A Summary of contents

Page 1

... The TA2041A is a four-channel Audio Amplifier that uses Tripath’s proprietary Digital Power TM Processing (DPP ) technology. Class-T amplifiers offer both the audio fidelity of Class-AB and the power efficiency of Class-D amplifiers. The TA2041A has been designed specifically for automotive head unit applications and is configured with four bridged outputs operating on a single 10-21V supply ...

Page 2

... 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 TA2041A is still fully protected from load dump transients in AM Mode. : The in Note 3 put section pins (pins 1-9, 11,12) should not be connected to voltages over 5 ...

Page 3

... Vs=20.0V 70W sat sq wave Po=1W 1kHz Po=1W 10kHz A-Weighted MIN. TYP. MAX. UNITS kΩ 220 250 mA 100 200 µA 0 + µA = 4Ω. Measurement L MIN. TYP. MAX. UNITS 0.04 0.10 % 0.02 0. 101 125 150 µV TA2041A – KL/ Rev. 5.4/04.05 ...

Page 4

... Output Noise Voltage Note 9: The TA2041A 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. ...

Page 5

... TA2041A Pinout Note: The heat slug of the TA2041A is connected to PGND 32-pin SSIP Package (Top View) TA2041A – KL/ Rev. 5.4/04.05 ...

Page 6

... Channel 4 Input Internal reference bypass capacitor connection INPUT (L) Logic input, ACTIVE LOW. Setting SLEEP to low puts the TA2041A in sleep mode. This pin must be driven high via an external power supply or microcontroller for the TA2041A to begin operation. Input range with 3.3V compliant inputs. ...

Page 7

... Modulation VPP VREF PGND VPP Processing PGND & Modulation VPP VREF PGND VPP Processing PGND & Modulation VPP VREF PGND Charge Pump Supply Internal 5V Regulator PROTECTION Over-Current Over/Under-Voltage Over-Temperature MODE CONTROL Mute Standby AM Mode Clipping/Signal Overload Detection TA2041A – KL/ Rev. 5.4/04.05 ...

Page 8

... VPP3 17 VPP4 PGND34 0.1uF 0.47uF 10Ω 0.01uF 0.47uF O 0.47uF 0.47uF 10Ω 0.01uF 0.47uF O O 0.47uF 0.47uF 10Ω 0.01uF 0.47uF O 0.47uF 0.47uF 10Ω 0.01uF 0.47uF O 0.47uF V REGEXT R FAULT 51KΩ VPP 0.1uF BR 1000uF PGND VPP 0.1uF BR 1000uF PGND TA2041A – KL/ Rev. 5.4/04.05 ...

Page 9

... Supply decoupling for the power supply pins. For optimum performance, these S components should be located close to the TA2041A and returned to their respective “ground” as shown in the Application/Test Circuit. C Supply decoupling for the high current full-bridge supply pins. These components BR must be located as close to the power supply pins as possible to minimize output ringing which causes power supply overshoot ...

Page 10

... BW = 30kHz BW = 22kHz 50 100 200 500 fficiency and P ower D issipation versus Total Output P ower E ffic ienc y P ower Dis sipation V = 20. Ω 1kH 22H z - 20kH z(AES17) 50 100 150 200 Total Output P ower (W ) TA2041A – KL/ Rev. 5.4/04.05 50 100 5 k 10k 20k 250 300 ...

Page 11

... 14. 20. Output Power versus Supply Voltage Ω 1kHz BW = 22Hz - 20kHz(AES17 Supply Voltage (V) E fficiency and P ower D issipation versus Total output Power P ower Dissipation E fficienc 14. Ω 1kH 20kH z(AES17 Total Output P ower (W ) TA2041A – KL/ Rev. 5.4/04.05 50 100 THD+N = SSW THD+N = 10% THD ...

Page 12

... Application Information G EN ERAL D E SCR I PTI ON The TA2041A is a 4-channel BTL (Bridge Tied Load) output audio amplifier that operates on a single supply voltage ranging from 10-21V. The device is targeted specifically to meet the demands of OEM and aftermarket automobile in-dash head units. With a single supply voltage of 20V, the device delivers four 70 Watt (saturated square wave) channels into 4 ohm ...

Page 13

... Due to the gain structure of the TA2041A, it will likely be necessary to drive the input stage with more than 5Vpp to achieve the saturated sine wave output numbers shown in the typical characteristics. If this requirement is needed for a specific application, then the input pins (pins 1-4) should be schottky diode clamped between AGND (pin 10) and 5VGEN (pin 11) ...

Page 14

... This fault puts the amplifier into mute and resets automatically once the supply voltage is reduced below the hysteresis band. The TA2041A also has built-in load dump protection. This circuit puts the amplifier into sleep mode if the supply voltage is increased above 30V. The TA2041A is able to survive power supply spikes to 60V if the duration is less than 50mS. ...

Page 15

... This pin has a 1mA maximum sink current capability. H MUT EB PIN The HMUTEB pin is a logic output that indicates if the TA2041A is muted. This mute state can be simply caused a low state on the MUTEB pin or by various fault conditions within the TA2041A. A logic low on the HMUTEB pin indicates the TA2041A is muted ...

Page 16

... PERFOR MANC E MEASUR EMENT TA2 041A AMPL IF IER Tripath amplifiers operate by modulating the input signal with a high-frequency switching pattern. This signal is sent through a low-pass filter (external to the TA2041A) that demodulates it to recover an amplified version of the audio input. The frequency of the switching pattern is spread spectrum and typically varies between 200kHz and 1.5MHz, which is well above the 20Hz – ...

Page 17

... THD+N type measurements (when they are made with wide- bandwidth measuring equipment), these same filters can increase distortion due to inductor non-linearity. Multi-pole filters require relatively large inductors, and inductor non-linearity increases with inductor value TA2041A – KL/ Rev. 5.4/04.05 ...

Page 18

... Package Information TA2041A – KL/ Rev. 5.4/04.05 ...

Page 19

... A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system affect its safety or effectiveness 2560 Orchard Parkway, San Jose, CA 95131 408.750.3000 - P 408.750.3001 - F For more Sales Information, please visit us @ For more Technical Information, please visit www.tripath.com/cont_s.htm www.tripath.com/data.htm TA2041A – KL/ Rev. 5.4/04.05 ...

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