MAX5971A
NOT RECOMMENDED FOR NEW DESIGNSSingle-Port, 40W, IEEE 802.3af/at PSE Controller with Integrated MOSFET
40W, Single-Port, IEEE 802.3af/at-Compliant PSE Controller with Integrated 0.5Ω Power MOSFET and Sense Resistor
- Part Models
- 2
- 1ku List Price
- Starting From $7.12
Overview
- IEEE 802.3af/at Compliant
- Up to 40W for Single-Port PSE Applications
- Integrated 0.5Ω Power MOSFET and Sense Resistor
- PD Detection and Classification
- Programmable Current Limit for Class 5 PDs
- High-Capacitance Detection for Legacy Devices
- Supports Both DC and AC Load Removal Detections
- Current Foldback and Duty Cycle-Controlled Current Limit
- LED Indicator for Port Status
- Direct Fast-Shutdown Control Capability
- Space-Saving, 28-Pin TQFN (5mm x 5mm) Package
The MAX5971A is a single-port, power-sourcing equipment (PSE) power controller designed for use in IEEE® 802.3af/at-compliant PSE. This device provides powered device (PD) discovery, classification, current limit, DC and AC load-disconnect detections. The MAX5971A operates automatically without the need for any software programming and features an integrated power MOSFET and sense resistor. The device also supports new Class 5 and 2-event classification for detection and classification of high-power PDs. The MAX5971A provides up to 40W to a single port (Class 5 enabled) and still provides high-capacitance detection for legacy PDs.
The MAX5971A provides input undervoltage lockout (UVLO), input overvoltage lockout, overtemperature detection, output voltage slew-rate limit during startup, and LED status indication.
The MAX5971A is available in a space-saving, 28-pin TQFN (5mm x 5mm) power package, and is rated for the extended (-40°C to +85°C) temperature range.
Applications
- Industrial Automation Equipment
- Single-Port PSE End-Point Applications
- Single-Port PSE Power Injectors (Midspan Applications)
- Switches/Routers
- Wireless LAN Access Points/WiMAX™ Base Station
Documentation
Data Sheet 1
Design Note 2
Video 1
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| MAX5971AETI+ | LFCSP | ||
| MAX5971AETI+T | LFCSP |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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Request a Driver/SoftwareHardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| Power-over-Ethernet (PoE) Controllers 2 | ||
| MAX5969A | RECOMMENDED FOR NEW DESIGNS | IEEE 802.3af/at-Compliant, Powered Device Interface Controllers with Integrated Power MOSFET |
| MAX5969B | RECOMMENDED FOR NEW DESIGNS | IEEE 802.3af/at-Compliant, Powered Device Interface Controllers with Integrated Power MOSFET |
Evaluation Kits
Evaluation Kit for the MAX5971A