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高效率的交换模式直流/直流变频器是电池供电产品如移动电话、个人数字助理(PDA)以及掌上式计算机的必要部份。但由于这些变频器以交换模式运行,因此可能产生电磁干扰。对于移动式电话来说,这种干扰尤其值得关注,因为变频器所产生的电磁干扰可令电话的射频输入及输出出现假信号,大大影响语音传输的清晰度。 飞利浦半导体在’97功率会议上推出的新一代TEA1206单芯片直流/直流变频器彻底解决了电磁干扰问题,因为系统设计师可以将变频器的交换频率调校至与移动式电话参考频率同步(在9至20兆赫的范围内)。若
High-Efficiency Switching Modes DC / DC converters are an essential part of battery-operated products such as mobile phones, personal digital assistants (PDAs) and handheld computers. However, because these drives operate in switched mode, electromagnetic interference may occur. This interference is of particular concern for mobile phones because the electromagnetic interference generated by the frequency converter can cause glitches on the RF inputs and outputs of the phone, greatly affecting the clarity of the voice transmission. The new generation of TEA1206 single-chip DC / DC converters introduced by Philips Semiconductors at the ’97 Power Conference completely eliminates EMI issues because the system designer can adjust the frequency of the inverter to be synchronized to the reference frequency of the mobile phone 9 to 20 MHz). If