同步单电源模式下TDA7481音频开关功率放大器的设计

Design of TDA7481 Switching Power Amplifier Based on Synchronization Mode Single Power

提出了一种利用同步方式工作的单电源设计TDA7481音频开关功率放大器的方法.该方法使电源频率与TDA7481工作频率同步,并把12~24 V的直流电压升压到45 V的最佳工作电压,使整个电路在宽电压范围内工作,具有输出功率大,谐波干扰少的特点,可广泛应用在频响要求低于10 kHz的工业用报警器.

TDA7481 is designed with single power which worked on synchronizing operation mode.The power frequency can synchronize with the frequency of working mode and improve the 12～24 V DC voltage to the optimum operating voltage of 45 V by this way.The entire circuit works in a wide voltage range characteristic of high output power and has less harmonic interference.It can be widely used in industry alarm products,which requires a frequency below 10 kHz.