MAX5980A Quad, IEEE 802.3at/af PSE Controller for Power-over-Ethernet General Description Benefits and Features IEEE 802.3at/af Compliance Enables PD Discovery, The MAX5980A is a quad, power-sourcing equipment Classification, Current Limit, and Load-Disconnect (PSE) power controller designed for use in IEEE Detection 802.3at/af-compliant PSE. This device provides powered Provides Interoperability with Any Compliant PD device (PD) discovery, classification, current limit, and Two-Point Slope Measurement Verifies the Device load disconnect detection. The device supports both fully Connected to the Port automatic operation and software programmability. The Appropriate Settling Times Implemented to Reject device also supports new 2-Event classification and Class 50Hz/60Hz Power-Line Noise Coupling 5 for detection and classification of high-power PDs. The High Power Beyond IEEE 802.3at/af Standard device supports single-supply operation, provides up to Supported with Additional Classification (Class 5) 70W to each port (Class 5 enabled), and still provides when Needed high-capacitance detection for legacy PDs. IEEE Power-over-Ethernet (PoE) Transmission Facilitates Signaling Between Power-Sourcing 2 The device features an I C-compatible, 3-wire serial Equipment (PSE) and Powered Devices (PDs) interface, and is fully software configurable and program- Single-Supply Operation Provides Up to 70W per mable. The device provides instantaneous readout of Port for PSE Applications, Allowing High- 2 port current and voltage through the I C interface. The Capacitance Detection for Legacy PDs devices extensive programmability enhances system 0.25 Current-Sensing Resistor Helps Eliminate flexibility, enables field diagnosis, and allows for uses in Power Losses when Sensing High Currents other, nonstandard applications. Software-Configurable/Programmable Registers 2 through I C-Compatible, 3-Wire Serial Interface The device is available in a space-saving, 32-pin TQFN Produces Instantaneous Readout of Port Current (5mm x 5mm) power package and is rated for the automotive and Voltage through 9-Bit Port Current and Voltage (-40C to +105C) temperature range. Monitoring Supports DC Load-Removal Detection Applications Saves Space with Thermally Efficient Power Package Available in a 32-Pin (5mm x 5mm) TQFN with an PSE-ICM Exposed Pad for Heat Dissipation Power-Sourcing Equipment (PSE) Switches/Routers Ordering Information appears at end of data sheet. Midspan Power Injectors Simplified Operating Circuit AGND PORT 1 OUTPUT -54V OUT1 V DD EN PORT 2 GATE1 OUTPUT MAX5980A OUT2 EN PORT 3 GATE2 AUTO OUTPUT MIDSPAN OUT3 EN CL5 PORT 4 A0 GATE3 OUTPUT A1 OUT4 A2 A3 GATE4 -54V IEEE is a registered service mark of the Institute of Electrical and Electronics Engineers, Inc. 19-7422 Rev 1 4/15 SDAIN SDAOUT SCL INT DGND VEE SVEE1 SVEE2 SENSE1 SENSE2 SENSE3 SENSE4MAX5980A Quad, IEEE 802.3at/af PSE Controller for Power-over-Ethernet Absolute Maximum Ratings (Voltages referenced to V , unless otherwise noted.) Maximum Current into OUT ......................Internally Regulated EE AGND ....................................................................-0.3V to +80V Continuous Power Dissipation (T = +70C) A DGND, SVEE .....................................................-0.3V to +0.3V 32-Pin TQFN (derate 34.5mW/C above +70C) ...2758.6mW V ........................-0.3V to the lower (V + 0.3V) and +4V Operating Temperature Range ......................... -40C to +105C DD AGND OUT ....................................................-0.3V to (V + 0.3V) Storage Temperature Range ............................ -65C to +150C AGND GATE , SENSE ...................................................-0.3V to +22V Junction Temperature ......................................................+150C A3, A2, A1, A0, MIDSPAN, EN CL5, AUTO, Lead Temperature (soldering, 10s) .................................+300C INT, SCL, SDAIN, SDAOUT, EN to DGND .........-0.3V to +6V Soldering Temperature (reflow) .......................................+260C Maximum Current into INT and OUT .................................20mA Package Thermal Characteristics TQFN Junction-to-Ambient Thermal Resistance ( ) ........+29C/W Junction-to-Case Thermal Resistance ( ) ............+1.7C/W JA JC Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer board. For detailed information on package thermal considerations, refer to www.maximintegrated.com/thermal-tutorial. Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Electrical Characteristics (V = 32V to 60V, V = V = 0V, T = -40C to +105C. All voltages are referenced to V , unless otherwise noted. Typical AGND EE DGND A EE values are at V = 54V, T = +25C, and default register settings. Currents are positive when entering the pin, and negative AGND A otherwise.) (Note 2) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS POWER SUPPLIES Operating Voltage Range V V - V 32 60 V AGND AGND EE V = V = V INT, SDAOUT, OUT SENSE EE and all logic inputs unconnected Supply Currents I 5 7 mA EE V = V = V measured at AGND SCL SDAIN DD in power mode after GATE pullup GATE DRIVER AND CLAMPING GATE Pullup Current I Power mode, gate drive on, V = V -40 -50 -60 A PU GATE EE Port SHDN mode enabled GATE Pulldown Current I 40 A PDW V = V + 10V GATE EE Strong Pulldown Current I V = 500mV, V = V + 2V 25 mA PDS SENSE GATE EE External Gate Drive V V - V , power mode, gate-drive on 8.5 9.5 10.5 V GS GATE EE CURRENT LIMIT AND OVERCURRENT I register LIM set to 80h, 101 106.25 111.5 Class 03 Maximum V SENSE allowed during I register LIM Current-Limit Clamp Voltage V current-limit set to C0h, 200 212.5 225 mV SU LIM conditions, Class 4 V = 0V (Note 3) OUT I register LIM set to C0h, 405 430 455 Class 5 Maxim Integrated 2 www.maximintegrated.com