LT4276CHUFD#PBF - 

制造商：

LINEAR TECHNOLOGY LINEAR TECHNOLOGY

制造商产品编号：

LT4276CHUFD#PBF

仓库库存编号：

2492714

技术数据表：

(EN)

The LT4276CHUFD#PBF is an LTPoE++/PoE+/PoE powered device (PD) forward/flyback controller in 28 pin QFN package. This device is a pin to pin compatible family of IEEE 802.3 and LTPoE++ powered device (PD) controllers. It includes an isolated switching regulator controller capable of synchronous operation in both forward and flyback topologies with auxiliary power support. The LT4276C is a fully 802.3af compliant (13W type 1 (PoE) PD) and no opto isolator required for flyback operation. The device supports both forward and flyback power supply topologies and can be configurable for a wide range of PoE applications. Auxiliary input voltage can be accurately sensed with a resistor divider connected to AUX pin. The LT4276C utilizes an external, low RDS (ON) N channel MOSFET for hot swap function which maximizes power delivery, efficiency, reduces heat dissipation and eases thermal design.

• Superior surge protection (100V absolute maximum)
• Auxiliary power support as low as 9V
• Maximum PD (powered device) power of 13W
• External hot swap N channel MOSFET for lowest power dissipation and highest system efficiency
• Greater than 94% end to end efficiency with LT4321 ideal bridge
• Vin operating voltage is 60V (VPORT, HSSRC)
• Switching frequency of 300KHz at ROSC = 45.3Kohm to GND
• Maximum PG duty cycle is 66%
• Operating junction temperature range from -40°C to 125°C

参考价格及参考库存