TI TPS23750PWP

TPS23750 integrates the functionality of the TPS2375 with a primary-side DC/DC PWM controller. With minimal external components, designers can create a front-end solution for PoE PD applications. Except for the UVLO startup voltage (for compatibility with legacy systems), the TPS23770 and TPS23750 share identical functionality. The PoE front end includes all required IEEE 802.3af features, including detection, classification, UVLO, and inrush current control. The PoE input switch is integrated within the TPS23750. The DC/DC external switch MOSFET provides a fully featured DC/DC converter, along with additional protection features for a robust and reliable design.

• Complete 802.3af PoE interface
• Features derived from TPSS2375
• 100V, 0.6Ω internal pass MOSFET
• Standard and legacy UVLO selection
• Fixed 140mA inrush current limit
• Primary-side DC/DC converter control
• Minimum external component count
• Current mode control
• Isolated and non-isolated topologies
• Programmable operating frequency
• Current sense leading-edge blanking
• -50% duty cycle limit
• Voltage output error signal amplifier
• Internal PoE and converter sequencing
• Industry-standard 20-pin package
• Industrial temperature range: -40°C to 85°C

• All PoE PD devices include:
• Wireless access points
• VoIP phones
• Surveillance cameras