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PASADENA (MAXREFDES31#): 3.3V and 5V POE power devices

 
Overview

Introduction

The Pasadena (MAXREFDES31#) reference design features the MAX5969B and MAX5974A (see Figure 1). The MAX5969B controller is fully compliant with the IEEE® 802.3af/at standard for Power over Ethernet (PoE) systems. The device can also be powered from a wall adapter (WAD). WAD has higher priority than PoE and is controlled by MAX5969B. The MAX5974A controls a 40V to 57V input voltage, current-mode PWM converter with frequency foldback protection. The reference design uses these devices and is compatible with the IEEE 802.3af/at standard; it is also a high-performance, compact and cost-effective solution suitable for PDs supporting up to Level 4 power levels.

characteristic

application

  • Compatible with IEEE 802.3af/at

  • Dual output

  • strict rules

  • Low ripple

  • Excellent load transient response

  • high efficiency

  • security camera

  • wireless access point

  • point of sale terminal

参考设计图片
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