MAX5965A/MAX5965B 19-4593 Rev 3 3/12 High-Power, Quad, Monolithic, PSE Controllers for Power over Ethernet General Description Features The MAX5965A/MAX5965B are quad, monolithic, -48V IEEE 802.3af Compliant/IEEE 802.3at Compatible power controllers designed for use in IEEE 802.3af-com- Instantaneous Readout of Port Current Through pliant/IEEE 802.3at-compatible power-sourcing equipment 2 I C Interface (PSE). These devices provide powered device (PD) dis- covery, classification, current limit, DC and AC load discon- High-Power Mode Enables Up to 45W Per Port nect detections in compliance with the IEEE 802.3af High-Capacitance Detection for Legacy Devices standard. The MAX5965A/MAX5965B are pin compatible with the MAX5952/MAX5945/LTC4258/LTC4259A PSE Pin Compatible with MAX5952/MAX5945/ controllers and provide additional features. LTC4258/LTC4259A The MAX5965A/MAX5965B feature a high-power mode Four Independent Power-Switch Controllers that provides up to 45W per port. The MAX5965A/ PD Detection and Classification (Including 2- MAX5965B provide new Class 5 and 2-event classifica- Event Classification) tion (Class 6) for detection and classification of high- power PDs. The MAX5965A/MAX5965B provide Selectable Load-Stability Safety Check During instantaneous readout of each port current through the Detection 2 I C interface. The MAX5965A/MAX5965B also provide Supports Both DC and AC Load Removal high-capacitance detection for legacy PDs. Detections 2 These devices feature an I C-compatible, 3-wire serial inter- 2 face, and are fully software configurable and programmable. I C-Compatible, 3-Wire Serial Interface The class-overcurrent detection function enables system Current Foldback and Duty-Cycle-Controlled power management to detect if a PD draws more than the Current Limit allowable current. The MAX5965A/MAX5965Bs extensive programmability enhances system flexibility, enables field Open-Drain INT Signal diagnosis, and allows for uses in other applications. Direct Fast Shutdown Control Capability The MAX5965A/MAX5965B provide four operating modes Special Class 5 Classification to suit different system requirements. Auto mode allows the devices to operate automatically without any software supervision. Semi-automatic mode automatically detects Ordering Information and classifies a device connected to a port after initial software activation, but does not power up that port until PART TEMP RANGE PIN-PACKAGE instructed to by software. Manual mode allows total soft- ware control of the device and is useful for system diag- MAX5965AEAX+ -40C to +85C 36 SSOP nostics. Shutdown mode terminates all activities and MAX5965AUAX+* 0C to +85C 36 SSOP securely turns off power to the ports. MAX5965BEAX+ -40C to +85C 36 SSOP The MAX5965A/MAX5965B provide input undervoltage MAX5965BUAX+* 0C to +85C 36 SSOP lockout (UVLO), input undervoltage detection, a load- +Denotes a lead(Pb)-free/RoHS-compliant package. stability safety check during detection, input overvolt- *Future productcontact factory for availability. age lockout, overtemperature detection, output voltage slew-rate limit during startup, power-good status, and fault status. The MAX5965A/MAX5965Bs programma- Selector Guide bility includes startup timeout, overcurrent timeout, and load-disconnect detection timeout. AC DISCONNECT PART PIN-PACKAGE FEATURE The MAX5965A/MAX5965B are available in a 36-pin SSOP package and are rated for both extended (-40C to +85C) MAX5965AEAX+ 36 SSOP No and upper commercial (0C to +85C) temperature ranges. MAX5965AUAX+ 36 SSOP No Applications MAX5965BEAX+ 36 SSOP Yes Power-Sourcing Equipment (PSE) MAX5965BUAX+ 36 SSOP Yes Switches/Routers Pin Configuration appears at end of data sheet. Midspan Power Injectors IEEE is a registered service mark of the Institute of Electrical and Electronics Engineers, Inc. Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com.High-Power, Quad, Monolithic, PSE Controllers for Power over Ethernet ABSOLUTE MAXIMUM RATINGS (Voltages referenced to V , unless otherwise noted.) Maximum Power Dissipation (T = +70C) EE A AGND, DGND, DET , V , RESET, A3A0, SHD , OSC, 36-Pin SSOP (derate 17.4mW/C above +70C) .....1388.9mW DD SCL, SDAIN, AUTO .............................................-0.3V to +80V Operating Temperature Ranges: OUT ........................................................-12V to (AGND + 0.3V) MAX5965A/MAX5965B EAX ...-40C to +85C GATE (internally clamped) (Note 1) ..................-0.3V to +11.4V MAX5965A/MAX5965B UAX ...............................0C to +85C SENSE ..................................................................-0.3V to +24V Storage Temperature Range .............................-65C to +150C V , RESET, MIDSPAN, A3A0, SHD , OSC, SCL, Junction Temperature......................................................+150C DD SDAIN and AUTO to DGND ..................................-0.3V to +7V Lead Temperature (soldering, 10s) .................................+300C INT and SDAOUT to DGND....................................-0.3V to +12V Soldering Temperature (reflow) .......................................+260C Maximum Current into INT, SDAOUT, DET .......................80mA Note 1: GATE is internally clamped to 11.4V above V . Driving GATE higher than 11.4V above V may damage the device. EE EE 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 = 0V, V to V = +3.3V, all voltages are referenced to V , unless otherwise noted. Typical values are at AGND EE DD DGND EE V = +48V, V = +48V, V = (V + 3.3V), T = +25C. Currents are positive when entering the pin and negative other- AGND DGND DD DGND A wise.) (Note 2) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS POWER SUPPLIES V V - V 32 60 AGND AGND EE V 060 DGND Operating Voltage Range V V to V , V = V 2.4 3.6 DD DGND DGND AGND V DD V to V , V = V 3.0 3.6 DD DGND DGND EE V = V , V = V , DET = AGND, OUT EE SENSE EE all logic inputs open, SCL = SDAIN = V . DD I 4.8 6.8 EE INT and SDAOUT unconnected. Measured at Supply Currents mA AGND in power mode after GATE pullup I All logic inputs high, measured at V 0.2 0.4 DIG DD GATE DRIVER AND CLAMPING Power mode, gate drive on, V = V GATE EE GATE Pullup Current I -40 -50 -65 A PU (Note 3) Weak GATE Pulldown Current I SHD = DGND, V = V + 10V 42 A PDW GATE EE Maximum Pulldown Current I V = 600mV, V = V + 2V 100 mA PDS SENSE GATE EE V - V , power mode, gate drive on, GATE EE External Gate Drive V 9 10 11.5 V GS I = 1A PU 2 MAX5965A/MAX5965B