TAS5352具有完整的保护系统,能对各种故障条件下保护器件免受损害,保护性能`包括短路保护,过流保护,欠压保护,超温保护以及PWM信号丢失保护等.本文介绍了TAS5352的主要性能,采用TAS5352的系统方框图以及几种不同的应用电路图.
TI 125 W STEREO DIGITAL AMPLIFIER POWER STAGE
The TAS5352 is a high-performance, integrated stereo digital amplifier power stage designed to drive a 4-ohm bridge-tied load (BTL) at up to 125 W per channel with low harmonic distortion, low integrated noise, and low idle current.
The TAS5352 has a complete protection system integrated on-chip, safeguarding the device against a wide range of fault conditions that could damage the system. These protection features are short-circuit protection, over-current protection, under voltage protection, over temperature protection, and a loss of PWM signal (PWM activity detector).
A power-on-reset (POR) circuit is used to eliminate power-supply sequencing that is required for most power-stage designs.
主要性能:
Total Power Output (Bridge Tied Load)
2 × 125 W at 10% THD+N Into 4 ohm
2 × 100 W at 10% THD+N Into 6 ohm
Total Power Output (Single Ended)
4 × 45 W at 10% THD+N Into 3 ohm
4 × 35 W at 10% THD+N Into 4 ohm
Total Power Output (Parallel Mode)
1 × 250 W at 10% THD+N Into 2 ohm
1 × 195 W at 10% THD+N Into 3 ohm
>110 dB SNR (A-Weighted With TAS5518 Modulator)
<0.1% THD+N (1 W, 1 kHz)
Supports PWM Frame Rates of 192 kHz to 432 kHz
Resistor-Programmable Current Limit
Integrated Self-Protection Circuitry, Including:
Under Voltage Protection
Overtemperature Warning and Error
Overload Protection
Short-Circuit Protection
PWM Activity Detector
Standalone Protection Recovery
Power-On Reset (POR) to Eliminate System Power-Supply Sequencing
High-Efficiency Power Stage (>90%) With 80-m ohm Output MOSFETs
Thermally Enhanced 44-Pin HTSSOP Package (DDV)
Error Reporting, 3.3-V and 5.0-V Compliant
EMI Compliant When Used With Recommended System Design
应用:
Mini/Micro Audio System
DVD Receiver
Home Theater
图1.TAS5352外形图.
图2.典型的系统方框图.
图3.TAS5352功能方框图.
图4.带AD调制滤波器的差分(2N)BTL应用电路图
图5.带AD调制滤波器的非差分(1N)BTL应用电路图
图6.典型的SE 应用电路图
图7.带AD调制滤波器的差分(2N)PBTL应用电路图
图8.带AD调制滤波器的非差分(1N)PBTL应用电路图