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MAXREFDES1009: IEEE 802.3af/at-Compliant, PD Interface with Three Ultra-Small, High-Efficiency, Synchronous DC-DC Buck Converters

MAXREFDES1009

参考设计免责声明 参照  重要声明和免责声明  涵盖参考设计和其他Maxim资源

描述

Power over Ethernet (PoE) is a technology that allows network cables to deliver power to a powered device (PD) via power-sourcing equipment (PSE) or midspan, and has many advantages over traditional methods of delivering power.

PoE allows power and data to be combined, removing the need for altering the AC mains infrastructure and can be installed by non-electricians. PoE is an intelligent system designed with protection at the forefront, preventing overload, underpowering, and installation errors, while allowing simple scalability and reliability.

High-efficiency, step-down switching regulators minimize power loss with efficiencies greater than 90%, allowing reductions in excessive heat, longer lifetime of ICs, and maximum power available to the PD. Ultra-small packaging, no Schottky diode, and the use of all ceramic capacitors reduce the overall size of the design.

特征

  • IEEE 802.3af/at Compliance
  • 2-Event Classification
  • No Schottky-Synchronous Operation for High Efficiency and Reduced Cost
  • Internal Compensation and Feedback Divider for 5V Fixed Output Saves Space
  • All-Ceramic Capacitors, Ultra-Compact Layout
  • Peak Efficiency > 90%
  • 3mm × 2mm, 10-Pin TDFN and 5mm × 4.4mm, 14-Pin TSSOP Packages (MAX17502)
  • Thermally Enhanced, 3mm × 3mm, 10-Pin TDFN (MAX5969B)

Icon

设计, 制作, 测试

图中的电路板已经完成封装和测试。不可售。

 

示意图

PCB布局

物料清单(BOM)

试验结果

参数化

输入类型 Vin(Min) Vin(Max) Iout(Max) 单路/多路输出 Vout(V) Pout(W) 隔离/非隔离 拓扑
DC 37 57 1 - 5 - Non-Isolated Synchronous Buck

参数化

输入类型 DC
Vin(Min) 37
Vin(Max) 57
Iout(Max) 1
单路/多路输出 -
Vout(V) 5
Pout(W) -
隔离/非隔离 Non-Isolated
拓扑 Synchronous Buck

Maxim设备 (1)

器件号 名称 产品线 购买 设计套件和评估模块
MAX17502 60V、1A、超小尺寸、高效率、同步降压DC-DC转换器 开关稳压器 立即购买 Design Kits

Maxim设备 (1)

器件号 产品线
开关稳压器
60V、1A、超小尺寸、高效率、同步降压DC-DC转换器

设计资料 (4)

标题 类型 尺寸 日期
maxrefdes1009-bom XLSX 40KB 2019-07-09
maxrefdes1009-test-results PDF 452KB 2019-07-09
maxrefdes1009-assembly-top PDF 680KB 2019-07-09
maxrefdes1009-schematic PDF 83KB 2019-07-09
日期 类型
2019-07-09

maxrefdes1009-bom

(XLSX, 40KB)

2019-07-09

maxrefdes1009-test-results

(PDF, 452KB)

2019-07-09

maxrefdes1009-assembly-top

(PDF, 680KB)

2019-07-09

maxrefdes1009-schematic

(PDF, 83KB)

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