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| TI 125W立体声数字功放级应用方案 | |||||
作者：TI 方案来源：TI 点击数： 更新时间：2007-12-27  |
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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 详情请见: >http://focus.ti.com/lit/ds/symlink/tas5352.pdf |
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