TPS23753A 具有增强 ESD 穿越功能的 IEEE 802.3-2005 PoE 接口和隔离式转换控制器 | 德州仪器 TI.com.cn

TPS23753A
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具有增强 ESD 穿越功能的 IEEE 802.3-2005 PoE 接口和隔离式转换控制器

 

备选器件推荐

  • TPS23755  -  Use this product in a primary side regulated diode rectified flyback; for 12V or higher output voltage applications.
  • TPS23758  -  Use this product in a primary side regulated synchronous rectified flyback; for 5V or less output voltage applications.

描述

The TPS23753A 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 IEEE 802.3af).

The TPS23753A 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 start-up mechanism with an internal, switched current source. This provides the advantages of cycling overload fault protection without the constant power loss of a pullup resistor.

The programmable oscillator may be synchronized to a higher-frequency external timing reference. The TPS23753A features improvements for uninterrupted device operation through an ESD event.

特性

  • Enhanced ESD Ride-Through Capability
  • Optimized for Isolated Converters
  • Complete PoE Interface
  • Adapter ORing Support
  • 12-V Adapter Support
  • Programmable Frequency With Synchronization
  • Robust 100-V, 0.7-Ω Hotswap MOSFET
  • Small 14-Pin TSSOP Package
  • 15-kV and 8-kV System Level ESD Capable
  • –40°C to 125°C Junction Temperature Range
  • Design Procedure Application Note – SLVA305
  • Adapter ORing Application Note – SLVA306

参数

与其它产品相比 供电设备 邮件 下载到电子表格中
Part number 立即下单 Vin (Min) (V) Vin (Max) (V) PoE current limit (Min) (mA) PoE inrush limit (Typ) (mA) rDS(on) per FET (Typ) (mOhms) PoE standards supported PD power level DC/DC control Fault response Features Package Group Package size: mm2:W x L (PKG) Switching frequency
TPS23753A 立即下单 9.3     57     405     140     700     802.3at Type 1 (802.3af)     13W     PD and DC/DC     Auto Retry     Primary Side Adapter Priority
Thermal Shutdown    
TSSOP | 14     14TSSOP: 32 mm2: 6.4 x 5 (TSSOP | 14)     Programmable
Synchronizable    
TPS23750 立即下单 0     67     405     140     600     802.3at Type 1 (802.3af)     13W     PD and DC/DC     Auto Retry     Error Amplifier
Thermal Shutdown    
HTSSOP | 20     20HTSSOP: 42 mm2: 6.4 x 6.5 (HTSSOP | 20)     Programmable    
TPS23755 立即下单 10.2     57     405     140     360     802.3at Type 1 (802.3af)     13W     PD and DC/DC     Auto Retry     Advanced startup
Error Amplifier
Integrated Switching FET
Primary-Side Regulation
Secondary Side Adapter Priority
Spread Spectrum Frequency Dithering
Thermal Shutdown    
VSON | 23     23VSON: 24 mm2: 4 x 6 (VSON | 23)     Programmable
Synchronizable    
TPS23757 立即下单 9.3     57     400     140     430     802.3at Type 1 (802.3af)     13W     PD and DC/DC     Auto Retry     Primary Side Adapter Priority
Second Gate Drive
Thermal Shutdown    
TSSOP | 20     20TSSOP: 42 mm2: 6.4 x 6.5 (TSSOP | 20)     Programmable
Synchronizable    
TPS23758 立即下单 10.2     57     405     140     360     802.3at Type 1 (802.3af)     13W     PD and DC/DC     Auto Retry     Advanced startup
Error Amplifier
Integrated Switching FET
Primary Side Adapter Priority
Primary-Side Regulation
Spread Spectrum Frequency Dithering
Thermal Shutdown    
VSON | 23     23VSON: 24 mm2: 4 x 6 (VSON | 23)     Programmable
Synchronizable    
TPS23770 立即下单 0     67     405     140     600     802.3at Type 1 (802.3af)     13W     PD and DC/DC     Auto Retry     Error Amplifier
Thermal Shutdown    
HTSSOP | 20     20HTSSOP: 42 mm2: 6.4 x 6.5 (HTSSOP | 20)     Programmable