TPA3128D2 Datasheet, PDF (1/37 Pages) Texas Instruments – 2x30-W Class-D Amplifier With Low Idle Power Dissipation

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TPA3128D2
SLOS941A – MAY 2016 – REVISED DECEMBER 2016
TPA3128D2 2x30-W Class-D Amplifier With Low Idle Power Dissipation
1 Features
•1 Supports Multiple Output Configurations
– 2 × 30 W Into a 8-Ω BTL Load at 24 V
(TPA3128D2)
• Wide Voltage Range: 4.5 V to 26 V
• Efficient Class-D Operation
– Very Low Idle Current: <23 mA for
recommended LC filter configurations
– Greater than 90% Power Efficiency Combined
With Low Idle Loss Greatly Eliminates Need
for Heat Sink
– Adaptive Modulation Schemes based on
Output Power
– Smart Amplifier Drivers to Reduce the
Requirement for RC Snubbers
• Multiple Switching Frequencies
– AM Avoidance
– Master and Slave Synchronization
– 300-KHz to 1.2-MHz Switching Frequency
• Feedback Power-Stage Architecture With High
PSRR Reduces PSU Requirements
• Programmable Power Limit
• Parallel BTL Mode and Mono-Channel Mode
Support
• Supports Both Single and Dual Power Supply
Modes
• Integrated Self-Protection Circuits Including
Overvoltage, Undervoltage, Overtemperature, DC-
Detect, and Short Circuit With Error Reporting
• Thermally Enhanced Packages
– DAP (32-Pin HTSSOP Pad Down for
TPA3128D2)
2 Applications
• Bluetooth/Wireless Speakers
• Soundbars
• Mini-Micro Component, Docks
• LCD/LED TVs
• Home Theaters
3 Description
The TPA3128D2 devices are stereo efficient, digital
amplifier power stage for driving speakers up to 60 W
/ 2 Ω in PBTL mode. The TPA3128D2 has low idle
power loss and helps to extend the battery life of
Bluetooth/Wireless speakers and other battery-
powered audio systems. The high efficiency of the
TPA3128D2 device allows it to do 2 × 30 W without
external heat sink on a dual layer PCB. This device
proposed an efficiency boost Mode, which can
dynamically reduced the current ripple of the external
LC filter and the idle current .
The TPA3128D2 advanced oscillator/PLL circuit
employs a multiple switching frequency option to
avoid AM interferences, which is achieved together
with an option of either master or slave option,
making it possible to synchronize multiple devices.
The TPA3128D2 devices are fully protected against
faults with short-circuit protection and thermal
protection as well as overvoltage, undervoltage, and
DC protection. Faults are reported back to the
processor to prevent devices from being damaged
during overload conditions.
Device Information⁽¹⁾
PART NUMBER PACKAGE
BODY SIZE (NOM)
TPA3128D2
DAP (32)
11.00 mm × 6.20 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Figure 1. Simplified Application Circuit
Audio
Source
And Control
RIGHT
LEFT
AM Avoidance Control
GAIN control and Master/Slave setting
Power Limit
Capable of synchronizaing to other devices
TPA3128D2
MONO
DETECT
TAS5630
PBTL
DETECT
SD
MUTE
FAULT
LC
LC
AM2,1,0
GAIN/SLV
PLIMIT
SYNC
PVCC
AVCC
Power Supply
4.5V-26V
Separate Power
Supply (Optional)
4.5V-26V
Copyright © 2016, Texas Instruments Incorporated
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.