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MAX5942A

Maxim
Part Number MAX5942A
Manufacturer Maxim
Description IEEE 802.3af Power-Over-Ethernet Interface/PWM Controller
Published Apr 29, 2005
Detailed Description 19-3024; Rev 0; 10/03 IEEE 802.3af Power-Over-Ethernet Interface/PWM Controller for Power Devices General Description T...
Datasheet PDF File MAX5942A PDF File

MAX5942A
MAX5942A

Overview
19-3024; Rev 0; 10/03 IEEE 802.
3af Power-Over-Ethernet Interface/PWM Controller for Power Devices General Description The MAX5942A/MAX5942B integrate a complete power IC for powered devices (PD) in a power-over-ethernet (PoE) system.
The MAX5942A/MAX5942B provide a PD interface and a compact DC-DC PWM controller suitable for flyback and forward converters in either isolated or nonisolated designs.
The MAX5942A/MAX5942B PD interface complies with the IEEE 802.
3af standard, providing the PD with a detection signature, a classification signature, and an integrated isolation switch with programmable inrush current control.
These devices also feature power-mode undervoltage lockout (UVLO) with wide hysteresis and powergood status outputs.
The MAX5942A/MAX5942B also integrate all the building blocks necessary for implementing DC-DC fixedfrequency isolated power supplies.
This device is a current-mode controller with an integrated high startup circuit suitable for isolated telecom/industrial...


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