Overview
The TAS5342A, produced by Texas Instruments, is a high-performance, integrated stereo digital amplifier power stage. It is designed to drive a 4-Ω bridge-tied load (BTL) at up to 100 W per channel with low harmonic distortion, low integrated noise, and low idle current. The device features a comprehensive protection system, including short-circuit protection, over-current protection, under-voltage protection, over-temperature protection, and a loss of PWM signal detection. This ensures the device's reliability and safeguards against various fault conditions that could damage the system. The TAS5342A also includes a power-on-reset (POR) circuit to eliminate the need for power-supply sequencing, enhancing system integration and ease of use.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Total Power Output (Single Ended) | 4 × 40 W at 10% THD+N Into 3 Ω, 4 × 30 W at 10% THD+N Into 4 Ω | W |
| Total Power Output (Parallel Mode) | 1 × 200 W at 10% THD+N Into 2 Ω, 1 × 160 W at 10% THD+N Into 3 Ω | W |
| Signal-to-Noise Ratio (SNR) | >110 dB (A-Weighted With TAS5518 Modulator) | dB |
| Total Harmonic Distortion + Noise (THD+N) | <0.1% (1 W, 1 kHz) | % |
| PWM Frame Rates | 192 kHz to 432 kHz | kHz |
| Output MOSFETs Resistance | 80 mΩ (Low Side and High Side) | mΩ |
| Package Type | 44-Pin HTSSOP | - |
| Power Efficiency | >90% | % |
Key Features
- High-efficiency power stage with >90% efficiency and 80-mΩ output MOSFETs.
- Comprehensive protection system including under-voltage protection, overtemperature warning and error, overload protection, short-circuit protection, and PWM activity detector.
- Power-on-reset (POR) to eliminate system power-supply sequencing.
- Supports PWM frame rates of 192 kHz to 432 kHz.
- Resistor-programmable current limit and standalone protection recovery.
- Error reporting system with 3.3-V and 5-V compliance.
- Thermally enhanced package and EMI compliant design.
Applications
- Mini and micro audio systems.
- DVD receivers.
- Home theater systems.
Q & A
- What is the maximum power output of the TAS5342A in single-ended mode?
The TAS5342A can deliver up to 4 × 40 W at 10% THD+N into a 3 Ω load and up to 4 × 30 W at 10% THD+N into a 4 Ω load.
- What is the maximum power output in parallel mode?
In parallel mode, the TAS5342A can deliver up to 1 × 200 W at 10% THD+N into a 2 Ω load and up to 1 × 160 W at 10% THD+N into a 3 Ω load.
- What is the signal-to-noise ratio (SNR) of the TAS5342A?
The SNR is greater than 110 dB when used with the TAS5518 modulator.
- What are the supported PWM frame rates for the TAS5342A?
The TAS5342A supports PWM frame rates from 192 kHz to 432 kHz.
- What kind of protection features does the TAS5342A have?
The device includes under-voltage protection, overtemperature warning and error, overload protection, short-circuit protection, and a PWM activity detector.
- Does the TAS5342A require power-supply sequencing?
No, the TAS5342A includes a power-on-reset (POR) circuit to eliminate the need for power-supply sequencing.
- What is the efficiency of the TAS5342A power stage?
The power stage has an efficiency of greater than 90%.
- What is the resistance of the output MOSFETs in the TAS5342A?
The output MOSFETs have a resistance of 80 mΩ for both the low side and high side.
- What package type is the TAS5342A available in?
The TAS5342A is available in a 44-Pin HTSSOP package.
- Is the TAS5342A EMI compliant?
Yes, the TAS5342A is EMI compliant when used with recommended system design.
