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MAXIM Integrated - MAX5974AETE+T, MAX5969BETB+T, DS3231MZ+TRL
Maxim offered a turnkey solution to IP CAM for 5V system supply.
MAX5969B+MAX5974A is for 3.3V and 5V PD design
MAXREFDES31# Pasadena Reference Design
Pasadena 3.3V and 5V PoE Powered Device
The Pasadena (MAXREFDES31#) reference design features the MAX5969B and MAX5974A. The MAX5969B controller is fully compliant with the IEEE® 802.3af/at standard in a power-over-Ethernet (PoE) system. The device can also be powered from a wall adapter (WAD). The WAD operates with higher priority than PoE, which is controlled by the MAX5969B. The MAX5974A controls a 40V to 57V input-voltage, current mode PWM converters and provides frequency foldback. Using these devices, this reference design is IEEE 802.3af/at compliant. It is also a high-performance, compact, and cost-effective solution for a PD supporting power up to Class 4 power level.
Features
• IEEE 802.3af/at compliant
• Dual output
• Tight line regulation
• Low ripple
• Excellent load transient response
• High efficiency
Application
• Security cameras
• Wireless access points
• Point of sale terminals
Product Benefits
• Power saving / space saving / low cost solutions
Specifications
• Input=36V~57V
• Output=5V or 3.3V /2.5A
• Output ripple=±2%
• Load transient Vp-p=±5%
Block Diagram
Downloads
• MAX5969A-MAX5969B
• MAX5974A
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