Part # MAX5953A-MAX5953D datasheet

Part Manufacturer: Maxim

Maxim

Part Description: MAX5953A B C D DS


Part Details:

19-3945; Rev 1; 7/06 IEEE 802.3af PD Interface and PWM Controllers with Integrated Power MOSFETs MAX5953A/MAX5953B/MAX5953C/MAX5953D General Description Features The MAX5953A/MAX5953B/MAX5953C/MAX5953D Powered Device Interface integrate a complete power IC solution for Powered Fully Integrated IEEE 802.3af-Compliant PD Devices (PD) in a Power-Over-Ethernet (PoE) system, in Interface compliance with the IEEE 802.3af standard. The PD Detection and Programmable Classification MAX5953A/MAX5953B/MAX5953C/MAX5953D provide Signatures the PD with a detection signature, a classification sig- Less than 10µA Leakage Current Offset During nature, and an integrated isolation switch with program- Detection Integrated MOSFET for Isolation and Inrush mable inrush current control. These devices also Current Limiting integrate a voltage-mode PWM controller with two Gate Output Allows External Control of the power MOSFETs connected in a two-switch voltage- Internal Isolation MOSFET clamped DC-DC converter configuration. Programmable Inrush Current Control An integrated MOSFET provides PD isolation during Programmable Undervoltage Lockout detection and classification. All devices guarantee a (MAX5953A/MAX5953C) leakage current offset of less than 10µA during the DC-DC Converter detection phase. A programmable current limit pre- Clamped, Two-Switch Power IC for High vents high inrush current during power-on. The devices Efficiency feature power-mode undervoltage lockout (UVLO) with Integrated High-Voltage 0.4 Power MOSFETs wide hysteresis and long deglitch time to compensate Up to 15W Output Power for twisted-pair-cable resistive drop and to assure Bias Voltage Regulator with Automatic High- glitch-free transition between detection, classification, Voltage Supply Turn-Off and power-on/-off phases. The MAX5953A/MAX5953C 11V to 76V Wide Input Voltage Range have an adjustable UVLO threshold with the default Feed-Forward Voltage-Mode Control for Fast value compliant to the 802.3af standard, while the Input Transient Rejection MAX5953B/MAX5953D have a lower and fixed UVLO Programmable Undervoltage LockoutOvertemperature Shutdown


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MAX5953A-MAX5953D.pdf Datasheet