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TPS2377DR-1G4 Datasheet(PDF) 1 Page - Texas Instruments |
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TPS2377DR-1G4 Datasheet(HTML) 1 Page - Texas Instruments |
1 / 23 page D−8 PW−8 www.ti.com FEATURES APPLICATIONS DESCRIPTION VDD Input Current VRTN V Detect Classify Power Up and Inrush Class 3 (PG-RTN) Note: All Voltages With Respect to VSS. Current RX Pair CLASS DET RTN PG 1 3 6 4 5 7 8 ILIM 2 RJ-45 DF01S 2 Places Data to Ethernet PHY Data to Ethernet PHY Notes: 1) Class 3 PD depicted 2) PG pullup resistor is optional. TX Pair Spare Pair Spare Pair TPS2375-1 TPS2377-1 SLVS570 – MARCH 2005 IEEE 802.3af PoE POWERED DEVICE CONTROLLERS WITH AUTO-RETRY • VoIP Phones • Auto-Retry After Current-Limit Fault • WLAN Access Points • TPS2375-1: IEEE 802.3af Thresholds • Security Cameras • TPS2377-1: Legacy Thresholds • Internet Appliances • Fully Supports IEEE 802.3af Specification • POS Terminals • Integrated 0.58- Ω, 100-V, Low-Side Switch • 15-kV System Level ESD Capable PRODUCT SELECTOR • Programmable Inrush Current Control 2375-1 2377-1 2375 2376 2377 • Fixed 450-mA Current Limit UVLO 802.3af Legacy 802.3af Adjustable Legacy Protection Auto-Retry Auto-Retry Latch Latch Latch • Open-Drain, Power-Good Reporting Package PW D D, PW D,PW D,PW • Industrial Temperature Range: -40 °C to 85°C • 8-Pin SOIC and TSSOP Packages These easy-to-use 8-pin integrated circuits contain all of the features needed to develop an IEEE 802.3af-compliant powered device (PD). The TPS2375-1 and TPS2377-1 are second generation PDCs (PD Controllers) featuring a 100-V ratings and true open-drain, power-good function. These devices are auto-retry versions of selected TPS2375 family members. Information on the TPS2375/6/7 devices can be found on the TPS2375/6/7 data sheet (SLVS525A). In addition to the basic functions of detection, classification, and undervoltage lockout (UVLO), these controllers include an adjustable inrush limiting feature. The TPS2375-1 has 802.3af-compliant UVLO limits, and the TPS2377-1 has legacy UVLO limits. The TPS2375 family specifications incorporate a voltage offset of 1.5 V between its limits and the IEEE 802.3af specifications to accommodate the required input diode bridges used to make the PD polarity insensitive. Additional resources can be found on the TI Web site www.ti.com. Figure 1. Typical Application Circuit and Start-Up Waveforms Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. PRODUCTION DATA information is current as of publication date. Copyright © 2005, Texas Instruments Incorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
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