Overview
The TAS5614LA, produced by Texas Instruments, is a feature-optimized Class-D power amplifier designed for high-performance audio applications. This device is part of the PurePath™ HD family, known for its exceptional audio quality and efficiency. The TAS5614LA supports various output configurations, including single-ended, Bridge-Tied Load (BTL), and parallel BTL (PBTL), making it versatile for different system designs. It features large MOSFETs for improved power efficiency and a novel gate drive scheme to reduce losses in idle and low output signals.
Key Specifications
| Parameter | Test Conditions | Min | Max | Unit | |
|---|---|---|---|---|---|
| Power Output per Channel (BTL, 10% THD+N) | RL = 4 Ω | - | - | 150 | W |
| Power Output per Channel (BTL, 1% THD+N) | RL = 4 Ω | - | - | 125 | W |
| Total Harmonic Distortion + Noise (1 W, 1 kHz signal) | RL = 4 Ω | - | 0.03% | - | % |
| Signal-to-Noise Ratio (A-weighted, AES17 measuring filter) | - | - | 105 | - | dB |
| Power Supply Voltage (PVDD_X) | - | 10.8 | 12 | 13.2 | V |
| Gate-Drive Circuitry Voltage (GVDD_X) | - | 10.8 | 12 | 13.2 | V |
| Junction Temperature (TJ) | - | 0 | - | 125 | °C |
| Idle Losses (All channels switching) | - | - | 1.6 | - | W |
Key Features
- PurePath™ HD Integrated Feedback: Provides high-quality audio with 0.03% THD at 1 W into 4 Ω, > 65 dB PSRR (No Input Signal), and > 105 dB SNR (A-weighted, AES17 measuring filter).
- Configurable Output: Supports single-ended, Bridge-Tied Load (BTL), and parallel BTL (PBTL) output configurations.
- Efficient Power Supply: Requires a 12-V supply in addition to the typical 36-V power-stage supply, with internal voltage regulation and bootstrap circuitry for high-side gate drive.
- Low Idle Losses: Novel gate drive scheme reduces losses in idle and at low output signals, contributing to overall system efficiency.
- High Signal-to-Noise Ratio: Achieves a signal-to-noise ratio of up to 105 dB (A-weighted, AES17 measuring filter).
Applications
- Blu-ray™ and DVD Receivers: Ideal for high-quality audio output in home entertainment systems.
- High-Power Sound Bars: Suitable for sound bars requiring powerful and efficient audio amplification.
- Powered Subwoofers and Active Speakers: Enhances the audio performance in subwoofers and active speaker systems.
- Mini Combos and Other Audio Equipment: Can be used in various other audio applications where high-quality and efficient amplification is required).
Q & A
- What is the maximum power output per channel in BTL configuration?
The maximum power output per channel in BTL configuration is 150 W at 10% THD+N and 125 W at 1% THD+N into a 4 Ω load).
- What is the total harmonic distortion + noise at 1 W into 4 Ω?
The total harmonic distortion + noise at 1 W into 4 Ω is 0.03%).
- What is the signal-to-noise ratio of the TAS5614LA?
The signal-to-noise ratio is up to 105 dB (A-weighted, AES17 measuring filter)).
- What are the power supply voltage requirements for the TAS5614LA?
The device requires a 36-V power-stage supply (PVDD_X) and a 12-V supply (GVDD_X and VDD)).
- What is the junction temperature range for the TAS5614LA?
The junction temperature range is from 0°C to 125°C).
- What are the idle losses when all channels are switching?
The idle losses are approximately 1.6 W when all channels are switching).
- Can the TAS5614LA be configured in different output modes?
Yes, the TAS5614LA can be configured in single-ended, BTL, and parallel BTL (PBTL) output modes).
- What is the purpose of the bootstrap circuitry in the TAS5614LA?
The bootstrap circuitry is used to provide the necessary voltage for the high-side gate drive, requiring only external capacitors for each half-bridge).
- In which applications is the TAS5614LA commonly used?
The TAS5614LA is commonly used in Blu-ray and DVD receivers, high-power sound bars, powered subwoofers, active speakers, and other high-quality audio equipment).
- How does the TAS5614LA achieve high efficiency?
The TAS5614LA achieves high efficiency through the use of large MOSFETs and a novel gate drive scheme that reduces losses in idle and at low output signals).
