MAX5074AAUP+

    MAX5074A Power IC with Integrated MOSFETs for Isolated IEEE 802.3af PD and Telecom Power-Supply Applications   Description The MAX5074A 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 configurations 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 external magnetics and capacitors. The MAX5074A is rated for operation over the -40°C to +125°C temperature range and is available in a 20-pin TSSOP package. Warning: The MAX5074A is designed to work with high voltages. Exercise caution. Key Features            Clamped, Two-Switch Power IC for High Efficiency No Reset Winding Required Up to 15W Output Power Bias Voltage Regulator with Automatic High-Voltage Supply Turn-Off 11V to 76V Wide Input Voltage Range Integrated High-Voltage 0.4Ω Power MOSFETs Feed-Forward Voltage-Mode Control for Fast Input Transient Rejection Programmable Brownout Undervoltage Lockout Internal Overtemperature Shutdown Indefinite Short-Circuit Protection with Programmable Fault Integration Integrated Look-Ahead Signal for Secondary-Side Synchronous Rectification    > 90% Efficiency with Synchronous Rectification Up to 500kHz Switching Frequency High-Power (1.74W), Small-Footprint 20-Pin Thermally Enhanced TSSOP Package   Applications/Uses         48V Input, Isolated Power-Supply Modules ADSL Line Cards ADSL Line-Driver Power Supplies Distributed Power Systems with 48V Bus High-Efficiency Telecom/Datacom Power Supplies IEEE 802.3af PD Power Supplies Isolated IP Phone Power Supplies WLAN Access-Point Power Supplies   Part Number Package MAX5074AAUP+ TSSOP-EP; 20Pin; 42.9mm2   Part Number Package MAX5074AAUP+T TSSOP-EP; 20Pin; 42.9mm2                                                                                               © 2016 Maxim Integrated