Isolated power supplies for local area networks are discussed.
Local area networks
Local Area Networks such as Ethernet or Cheapernet, require low cost isolated power supplies with modest line and load regulation. Table 237.1 summarizes the objective design specifications based on IEEE 802.3 and ECMA 200-V. The LT1072 high efficiency switching regulator can be used in isolated flyback mode to satisfy these requirements with minimal support circuitry.1
Power Supply Specifications for Figure 237.1
|VOUT||−9V||Ethernet 11.4 <VIN < 12.6V|