EVALUATION KIT AVAILABLE Click here for production status of specific part numbers. MAX5982A/MAX5982B/ IEEE 802.3af/at-Compliant, MAX5982C Powered Device Interface Controllers with Integrated 70W High-Power MOSFET General Description Features The MAX5982A/MAX5982B/MAX5982C provide a com- Sleep Mode and Ultra-Low-Power Sleep plete interface for a powered device (PD) to comply with (MAX5982A/MAX5982B) the IEEE 802.3af/at standard in a power-over-Ethernet IEEE 802.3af/at Compliant (PoE) system. The MAX5982A/MAX5982B/MAX5982C 2-Event Classification or an External Wall Adapter provide the PD with a detection signature, classifica- Indicator Output tion signature, and an integrated isolation power switch with inrush current control. During the inrush period, the Simplified Wall Adapter Interface MAX5982A/MAX5982B/MAX5982C limit the current to PoE Classification 05 less than 182mA before switching to the higher current 100V Input Absolute Maximum Rating limit (1700mA to 2100mA) when the isolation power Inrush Current Limit of 182mA Maximum MOSFET is fully enhanced. The devices feature an input UVLO with wide hysteresis and long deglitch time to com- Current Limit During Normal Operation Between pensate for twisted-pair cable resistive drop and to assure 1700mA and 2100mA glitch-free transition during power-on/-off conditions. The Current Limit and Foldback MAX5982A/MAX5982B/MAX5982C can withstand up to Legacy UVLO at 36V 100V at the input. LED Driver with Programmable LED Current The MAX5982A/MAX5982B/MAX5982C support a (MAX5982A/MAX5982B) 2-Event classification method as specified in the IEEE 802.3at standard and provide a signal to indicate when Overtemperature Protection probed by a Type 2 power sourcing equipment (PSE). Thermally Enhanced, 5mm x 5mm, 16-Pin TQFN The devices detect the presence of a wall adapter power source connection and allow a smooth switchover from Applications the PoE power source to the wall power adapter. IEEE 802.3af/at Powered Devices The MAX5982A/MAX5982B/MAX5982C also provide a IP Phones, Wireless Access Nodes, IP Security power-good (PG) signal, two-step current limit and fold- Cameras back, overtemperature protection, and di/dt limit. A sleep WiMAX Base Stations mode feature in the MAX5982A/MAX5982B provides low power consumption while supporting Maintain Power Signature (MPS). An ultra-low-power sleep mode feature in the MAX5982A/MAX5982B further reduces power consumption while still supporting MPS. The MAX5982A/ MAX5982B also feature an LED driver that is automati- Ordering Information appears at end of data sheet. cally activated during sleep mode. The MAX5982A/MAX5982B/MAX5982C are available in a 16-pin, 5mm x 5mm, TQFN power package. These devices are rated over the -40C to +125C extended temperature range. WiMAX is a trademark of WiMAX Forum. IEEE is a registered service mark of the Institute of Electrical and Electronics Engineers, Inc. 19-5960 Rev 1 3/19MAX5982A/MAX5982B/ IEEE 802.3af/at-Compliant, MAX5982C Powered Device Interface Controllers with Integrated 70W High-Power MOSFET Absolute Maximum Ratings V to V ..........................................................-0.3V to +100V Operating Temperature Range ......................... -40C to +125C DD SS DET, RTN, WAD, PG, 2EC to V ......................-0.3V to +100V Maximum Junction Temperature .....................................+150C SS CLS, SL, WK, ULP, LED to V .............................-0.3V to +6V Storage Temperature Range ............................ -65C to +150C SS Maximum Current on CLS (100ms maximum) .................100mA Lead Temperature (soldering, 10s) .................................+300C Continuous Power Dissipation (T = +70C) (Note 1) Soldering Temperature (reflow) .......................................+260C A TQFN (derate 28.6mW/C above +70C) Multilayer Board ......................................................2285.7mW 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. Note 1: Maximum power dissipation is obtained using JEDEC JESD51-5 and JESD51-7 specifications. Package Thermal Characteristics (Note 2) TQFN Junction-to-Ambient Thermal Resistance ( ) ..........35C/W JA Junction-to-Case Thermal Resistance ( ) ..............2.7C/W JC Note 2: 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. Electrical Characteristics (V = (V - V ) = 48V, R = 24.9k, R = 615, and R = 60.4k. RTN, WAD, PG, 2EC, WK, and ULP unconnected, all IN DD SS DET CLS SL voltages are referenced to V , unless otherwise noted. T = T = -40C to +125C, unless otherwise noted. Typical values are at SS A J T = +25C.) (Note 3) A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS DETECTION MODE Input Offset Current I V = 1.4V to 10.1V (Note 4) 10 A OFFSET IN Effective Differential Input V = 1.4V up to 10.1V with 1V step, IN dR 23.95 25.00 25.50 k Resistance V = RTN = WAD = PG = 2EC (Note 5) DD CLASSIFICATION MODE Classification Disable V V rising (Note 6) 22.0 22.8 23.6 V TH,CLS IN Threshold Classification Stability Time 0.2 ms Class 0, R = 615 0 3.96 CLS Class 1, R = 117 9.12 11.88 CLS V = 12.5V to IN Class 2, R = 66.5 17.2 19.8 20.5V, V = CLS DD Classification Current I mA CLASS RTN = WAD = Class 3, R = 43.7 26.3 29.7 CLS PG = 2EC Class 4, R = 30.9 36.4 43.6 CLS Class 5, R = 21.3 52.7 63.3 CLS TYPE 2 (802.3at) CLASSIFICATION MODE Mark Event Threshold V V falling 10.1 10.7 11.6 V THM IN Hysteresis on Mark Event 0.82 V Threshold V falling to enter mark event, 5.2V IN Mark Event Current I 0.25 0.85 mA MARK V 10.1V IN Reset Event Threshold V V falling 2.7 3.8 5.2 V THR IN Maxim Integrated 2 www.maximintegrated.com