LM5070是TI公司的一款有源器件产品，LM5070是集成以太网供电 PD 接口和 PWM 控制器，本页介绍了LM5070的产品说明、应用、特性等，并给出了与LM5070相关的TI元器件型号供参考。
LM5070 - 集成以太网供电 PD 接口和 PWM 控制器 - 有源器件 - 以太网供电(PoE)/LAN解决方案 - TI公司（Texas Instruments，德州仪器）
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, 1?, 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)
