TPS23753 - IEEE 802.3-2005 PoE 接口和隔离式转换控制器

TPS23753是TI德州仪器公司的一款有源器件产品，TPS23753是IEEE 802.3-2005 PoE 接口和隔离式转换控制器，本站介绍了TPS23753的封装应用图解、特点和优点、功能等，并给出了与TPS23753相关的TI元器件型号供参考。

TPS23753 - IEEE 802.3-2005 PoE 接口和隔离式转换控制器 - 有源器件 - 以太网供电(PoE)/LAN解决方案 - 德州仪器

产品描述

The TPS23753 is a combined Power over Ethernet (PoE) powered device (PD) interface and current-mode dc/dc controller optimized specifically for isolated converter designs. The PoE implementation supports the IEEE 802.3at standard as a 13 W, type 1 PD. The requirements for an IEEE 802.3at type 1 device are a superset of IEEE 802.3-2008 (originally 802.3af) requirements.

The TPS23753 supports a number of input-voltage ORing options including highest voltage, external adapter preference, and PoE preference.

The PoE interface features an external detection signature pin that can also be used to disable the internal hotswap MOSFET. This allows the PoE function to be turned off. Classification can be programmed to any of the defined types with a single resistor.

The dc/dc controller features a bootstrap startup mechanism with an internal, switched current source. This provides the advantages of cycling overload fault protection without the constant power loss of a pull up resistor.

The programmable oscillator may be synchronized to a higher-frequency external timing reference.

产品特性

Optimized for Isolated Converters
Complete PoE Interface
Adapter ORing Support
12 V Adapter Support
Programmable Frequency with Synch.
Robust 100 V, 0.7 Hotswap MOSFET
Small TSSOP 14 Package
15 kV / 8 kV System Level ESD Capable
–40°C to 125°C Junction Temperature Range
Design Procedure Application Note - SLVA305
Adapter ORing Application Note - SLVA306
APPLICATIONS
- IEEE 802.3at Compliant Powered Devices
- VoIP Telephones
- Access Points
- Security Cameras

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