100-W and 50-W Class-D Stereo Automotive Amplifiers
1 Features
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• Supports Multiple Output Configurations– 2×50WIntoa4-Ω BTL Load at 21 V
(TPA3116D2-Q1)– 2×30WIntoan 8-Ω BTL Load at 24 V
(TPA3118D2-Q1)
• WideVoltage Range: 4.5 V to 26 V
• Efficient Class-D Operation– >90%Power Efficiency Combined With Low
Idle Loss Greatly Reduces Heat Sink Size– Advanced Modulation Schemes
• Multiple Switching Frequencies– AMAvoidance– Master and Slave Synchronization– Upto1.2-MHz Switching Frequency
• Feedback Power-Stage Architecture With High
PSRR Reduces PSU Requirements
• Programmable Power Limit
• Differential and Single-Ended Inputs
• Stereo BTL and Mono PBTL Modes
• Single Power Supply Reduces Component Count
• Integrated Self-Protection Circuits Including
Overvoltage, Undervoltage, Overtemperature, DC
Detect, and Short Circuit With Error Reporting
• Designed for Automotive EMC Requirements
• Thermally Enhanced Packages– DAD(32-pin HTSSOP Pad Up)– DAP(32-pin HTSSOP Pad Down)––40°C to 125°C Ambient Temperature Range
• Qualified for Automotive Applications
• AEC-Q100 Qualified With the Following Results:– Device Temperature Grade 1:–40°C to 125°C
Ambient Operating Temperature Range– Device HBM ESD Classification Level H2– Device CDM ESD Classification Level C4B
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2 Applications
• Automotive Audio
• Emergency Call
• Driver Notifications
3 Description
The TPA311xD2-Q1 devices are automotive stereo,
efficient, digital-amplifier power stages for driving
speakers up to 100 W into 2 Ω in mono. The
TPA3118D2-Q1 can even drive 2 × 30 W into 8 Ω
without a heat sink on a dual-layer PCB. If even
higher power is needed, the TPA3116D2-Q1 drives
2 × 50 W into 4 Ω with a small heat sink attached to
its top-side thermal pad.
The TPA311xD2-Q1 advanced oscillator and PLL
circuit employ a multiple-switching-frequency option
to avoid AM interference; this is achieved together
with an option of either master or slave selection,
making it possible to synchronize multiple devices.
The TPA311xD2-Q1 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.
