The LM5070 power interface port and pulse width modulation (PWM) controller provides a complete integrated solution for Powered Devices (PD) that connect into Power over Ethernet (PoE) systems. The LM5070 integrates an 80V, 400mA line connection switch and associated control for a fully IEEE 802.3af compliant interface with a full featured current mode pulse width modulator dc-dc converter. All power sequencing requirements between the controller interface and switch mode power supply (SMPS) are integrated into the IC. Two options are available providing either an 80% maximum duty cycle limit with slope compensation (on the –80 suffix) device or a 50% maximum duty cycle limit and no slope compensation on the (–50 suffix) device.
● Fully Compliant 802.3af Power Interface Port
● 80V, 1Ω, 400 mA Internal MOSFET
● Programmable Inrush Current Limit
● Detection Resistor Disconnect Function
● Programmable Classification Current
● Programmable Under-voltage Lockout with Programmable Hysteresis
● Thermal Shutdown Protection
● Current Mode Pulse Width Modulator
● Supports Both Isolated and Non-Isolated Applications
● Error Amplifier and Reference for Non-Isolated Applications
● Programmable Oscillator Frequency
● Programmable Soft-Start
● 80% Maximum Duty Cycle Limiter, Slope Compensation (-80 device)
● 50% Maximum Duty Cycle Limiter, No Slope Compensation (-50 device)
● 800 mA Peak Gate Driver
●## Packages
● TSSOP-16
● WSON-16 (5 mm x 5 mm)
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