TPA31xxD2 Series Stereo Efficient Digital Amplifier

FEATURES

• Supports Multiple Output Configurations:
  • 2x50-W into a 4-Ω BTL Load at 21 V (TPA3116D2)
  • 2x30-W into an 8-Ω BTL Load at 24 V (TPA3118D2)
  • 2x15-W into an 8-Ω BTL Load at 15 V (TPA3130D2)
• Wide Voltage Range: 4.5 V – 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
  • AM Avoidance
  • Master/Slave Synchronization
  • Up to 1.2 MHz Switching Frequency
  • Feedback Power Stage Architecture with High PSRR Reduces PSU Requirements
  • Programmable Power Limit
  • Differential/Single-Ended Inputs
  • Stereo and Mono Mode with Single Filter Mono Configuration
  • Single Power Supply Reduces Component Count
  • Integrated Self-Protection Circuits Including Over-Voltage, Under-Voltage, Over-Temperature, DC-Detect, and Short Circuit with Error Reporting
  • Thermally Enhanced Packages:
    • DAD (32-pin HTSSOP Pad-up)
    • DAP (32-pin HTSSOP Pad-down)
  • -40°C to 85°C Ambient Temperature Range

DESCRIPTION

The TPA31xxD2 series are stereo efficient, digital amplifier power stages for driving speakers up to 100W/20 in mono. The high efficiency of the TPA3130D2 allows it to do 2x15W without external heat sink on a single layer PCB. The TPA3118D2 can even run 2x30W/8Ω without heat sink on a dual layer PCB. If even higher power is needed the TPA3116D2 does 2x50W/4Ω with a small heat-sink attached to its top side PowerPad. All three devices share the same footprint enabling a single PCB to be used across different power levels.

The TPA31xxD2 advanced oscillator/PLL circuit employs a multiple switching frequency option to avoid AM interferences; this is achieved together with an option of Master/Slave option, making it possible to synchronize multiple devices.

The TPA31xxD2 devices are fully protected against faults with short-circuit protection and thermal protection as well as over-voltage, under-voltage and DC protection. Faults are reported back to the processor to prevent devices from being damaged during overload conditions.

Simplified Application Circuit

A diagram shows a simplified application circuit for the TPA3116D2. It includes an Audio Processor and control unit, the TPA3116D2 chip, a 4.5 V-26 V PSU, and two LC filters connected to Left and Right speakers. Control signals include Tuner, AM/FM, Left, Right, GND, MUTE, FAULTZ, GAIN control and Master/Slave setting, and Power Limit (PLIMIT). The circuit is described as capable of synchronizing to other devices.

APPLICATIONS

• Mini-Micro Component, Speaker Bar, Docks
• After-Market Automotive
• CRT TV
• Consumer Audio Applications

Evaluation Module Information

The TPA3116D2 evaluation module demonstrates TI's 50W stereo analog input Class D audio amplifier. It uses a small number of external components mounted on the circuit board, which can be used to directly drive speakers with an external analog audio source as input. The evaluation module can also be configured as a 100W Class D mono audio amplifier in PBTL mode.

About TPA3116D2 Amp Chip Features

• 2x50W power for 4Ω loads at 24V (<1% THD+N) in stereo BTL mode
• 1x100W power for 3Ω loads at 24V (10%THD +N) in mono PBTL mode
• Wide supply voltage range: 4.5V to 26V
• Wide conversion rate: 400kHz to 1.2MHz
• Four optional fixed gain Settings
• Integrated self-protection circuit, including overvoltage, undervoltage, overheating, DC detection and short circuit protection, and has error reporting function