LM5070SD-50

• Fully 802.3af compliant power interface port
• 80V，1 , 400 mAh internal MOSFET
• Programmable inrush current limiting
• Detect resistor disconnection function
• Programmable classified current
• Programmable undervoltage latching with programmable hysteresis
• Thermal shutdown protection
• Current mode pulse width modulator
• Supports both isolated and non-isolated applications
• Error amplifiers and reference non-isolated applications
• Programmable oscillator frequency
• Programmable soft start
• 80% maximum duty cycle limit, slope compensation (-80 devices)
• 50% maximum duty cycle limit with no slope compensation (-50 devices)
• 800 mA peak gate driver

illustrate

The LM5070 power interface port and pulse width modulation (PWM) controller provide a complete integrated solution (PD) for power supply devices connected to a Power over Ethernet (PoE) system. The LM5070 integrates an 80V, 400 mA wire-connected switch with a fully IEEE 802.3af compliant interface and a full-featured current-mode pulse width modulator DC-DC converter-related control. The interface between all power sequencing controllers and the requirement for switch-mode power supplies (SMPS) is integrated into the IC. Two options are available, providing 80% of the maximum duty cycle period with a slope compensation (-80 suffix) device or a 50% maximum duty cycle limit, with no slope compensation (-50 suffix) device limit.