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Data terminal equipment (DTE), such as wireless LAN and wireless local loop, may require data and power src="/data/attachment/portal/201007/ET12538201007191111341.gif">
Figure 1.
The circuit of Figure 2 has a 24V output and can deliver current up to 3 amperes, enough to power a system with two ports. A switching frequency of 500kHz was chosen as a compromise between switching loss and the size of inductor L1. Increasing the value of gate resistance R7 will reduce EMI noise, but increase switching loss. A value of 4.7Ω was chosen as a compromise. At an input voltage of 12V, a full load of 3 amperes and an output of 24V, the conversion efficiency was 93%.
Figure 2.
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