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MAX5965BEAX+ Datasheet(PDF) 1 Page - Maxim Integrated Products |
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MAX5965BEAX+ Datasheet(HTML) 1 Page - Maxim Integrated Products |
1 / 52 page General Description The MAX5965A/MAX5965B are quad, monolithic, -48V power controllers designed for use in IEEE® 802.3af-com- pliant/pre-IEEE 802.3at-compatible power-sourcing equip- ment (PSE). These devices provide powered device (PD) discovery, classification, current limit, DC and AC load dis- connect detections in compliance with the IEEE 802.3af standard. The MAX5965A/MAX5965B are pin compatible with the MAX5952/MAX5945/LTC4258/LTC4259A PSE controllers and provide additional features. The MAX5965A/MAX5965B feature a high-power mode that provides up to 45W per port. The MAX5965A/ MAX5965B provide new Class 5 and 2-event classifica- tion (Class 6) for detection and classification of high- power PDs. The MAX5965A/MAX5965B provide instantaneous readout of each port current through the I2C interface. The MAX5965A/MAX5965B also provide high-capacitance detection for legacy PDs. These devices feature an I2C-compatible, 3-wire serial inter- face, and are fully software configurable and programmable. The class-overcurrent detection function enables system power management to detect if a PD draws more than the allowable current. The MAX5965A/MAX5965B’s extensive programmability enhances system flexibility, enables field diagnosis, and allows for uses in other applications. The MAX5965A/MAX5965B provide four operating modes to suit different system requirements. Auto mode allows the devices to operate automatically without any software supervision. Semi-automatic mode automatically detects and classifies a device connected to a port after initial software activation, but does not power up that port until instructed to by software. Manual mode allows total soft- ware control of the device and is useful for system diag- nostics. Shutdown mode terminates all activities and securely turns off power to the ports. The MAX5965A/MAX5965B provide input undervoltage lockout (UVLO), input undervoltage detection, a load- stability safety check during detection, input overvolt- age lockout, overtemperature detection, output voltage slew-rate limit during startup, power-good status, and fault status. The MAX5965A/MAX5965B’s programma- bility includes startup timeout, overcurrent timeout, and load-disconnect detection timeout. The MAX5965A/MAX5965B are available in a 36-pin SSOP package and are rated for both extended (-40°C to +85°C) and upper commercial (0°C to +85°C) temperature ranges. Applications Power-Sourcing Equipment (PSE) Switches/Routers Midspan Power Injectors Features o IEEE 802.3af Compliant/Pre-IEEE 802.3at Compatible o Instantaneous Readout of Port Current Through I2C Interface o High-Power Mode Enables Up to 45W Per Port o High-Capacitance Detection for Legacy Devices o Pin Compatible with MAX5952/MAX5945/ LTC4258/LTC4259A o Four Independent Power-Switch Controllers o PD Detection and Classification (Including 2- Event Classification) o Load-Stability Safety Check During Detection o Supports Both DC and AC Load Removal Detections o I2C-Compatible, 3-Wire Serial Interface o Current Foldback and Duty-Cycle-Controlled Current Limit o Open-Drain INT Signal o Direct Fast Shutdown Control Capability o Special Class 5 Classification High-Power, Quad, Monolithic, PSE Controllers for Power over Ethernet ________________________________________________________________ Maxim Integrated Products 1 19-4593; Rev 0; 7/09 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. Pin Configuration appears at end of data sheet. Ordering Information PART TEMP RANGE PIN-PACKAGE MAX5965AEAX+ -40°C to +85°C 36 SSOP MAX5965AUAX+* 0°C to +85°C 36 SSOP MAX5965BEAX+ -40°C to +85°C 36 SSOP MAX5965BUAX+* 0°C to +85°C 36 SSOP + Denotes a lead(Pb)-free/RoHS-compliant package. * Future product—contact factory for availability. IEEE is a registered service mark of the Institute of Electrical and Electronics Engineers, Inc. Selector Guide PART PIN-PACKAGE AC DISCONNECT FEATURE MAX5965AEAX+ 36 SSOP No MAX5965AUAX+ 36 SSOP No MAX5965BEAX+ 36 SSOP Yes MAX5965BUAX+ 36 SSOP Yes |
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