Power IC With Integrated MOSFETs For Isolated IEEE 802.3af PD And Telecom Power-Supply Applications

The MAX5074 isolated PWM power IC features integrated switching Power MOSFETs connected in a voltage- clamped, two-transistor, power-circuit configuration. This device CAN be used in both forward and flyback configu- rations with a wide input voltage range from 11V to 76V and up to 15W of output power. The voltage-clamped power topology enables full recovery of stored magnetizing and leakage inductive energy for enhanced efficiency and reliability. A look- ahead signal for driving secondary-side synchronous Rectifiers CAN be used to increase efficiency. A wide array of protection features includes UVLO, overtemperature shutdown, and short-circuit protection with hiccup current limit for enhanced performance and reliability. Operation up to 500kHz allows smaller exter- nal magnetics and capacitors. The MAX5074 is rated for operation over the -40C to +125C temperature range and is available in a 20-pin TSSOP package. By Maxim Integrated Products