Maxim at a Glance
At Maxim, we invent highly integrated solutions that make technology seamless. We channel our collective expertise to stretch the limits of technology, understand your needs, and help you get to market faster.
$2.4 billion (approx.) revenue in FY2012
$605 million revenue in Q3 FY2013
$4.33 billion in assets in Q3 FY2013
$1.57 billion in cash in Q3 FY2013
President and CEO
San Jose, CA, U.S.
1983. We celebrate our 30th anniversary in 2013.
Keywords: powered device, PD, Power over Ethernet, PoE, IEEE 802.3af, IEEE 802.3at, Class 2 PD, Class 3 PD, IP phones, IP cameras, security cameras, WAP, Wireless Access Point, Point of Sales, POS, Thin Client, Ethernet Repeater Related Parts
REFERENCE SCHEMATIC 5044
Low-EMI, Active-Clamped Forward, Class 4 Powered Device (PD) Provides High-Efficiency Solution for PoE Applications
May 09, 2011
Abstract: This reference design is for a highly efficient and low-EMI active-clamped forward, 5V powered device (PD). The design features the MAX5969B as its controller. The design also uses the MAX5974A, which controls current-mode PWM converters and provides inductive feedback, zero-voltage switching (ZVS), and frequency foldback to reduce cost and enhance supply efficiency for PoE applications. Using these devices, this reference design is IEEE® 802.3af/at compliant, and is a high-performance, compact, and cost-efficient solution for a Class 4 PD. The design can also support the auxiliary input voltage to provide maximum 25W output power.