Texas Instruments TPS2121RUXR | Demoboard TIDA-010046 PD

Description

This reference design provides a cost-optimized solution for 10 to 100Mbps using the low-power Ethernet physical layer (PHY) DP83825 supporting 150m reach over CAT5e cable which is beyond the standard Ethernet distance limitation of 100 m (328 feet). Also, demonstrating power delivery over Ethernet cable along with data communication using IEEE802.3at Type-1 (13W) PoE-PD TPS23755 device with integrated primary side regulated Flyback DC/DC controller. This reference design is pre-compliance tested for radiated emissions, ESDs, and EFTs.

Features

• Wide operating range: 2.8 V to 22 V– Absolute maximum input voltage of 24 V
• Low RON resistance:– TPS2120: 62 mΩ (typical)– TPS2121: 56 mΩ (typical)
• Adjustable overvoltage supervisor (OVx):– Accuracy < ±5%
• Adjustable priority supervisor (PR1):– Accuracy < ±5% - TPS2121 Supports external voltage reference (CP2) with an accuracy of <1%
• Output current limit (ILM):– TPS2120: 1 A – 3 A– TPS2121: 1 A – 4.5 A
• Channel status indication (ST)
• Adjustable input settling time (SS)
• Adjustable output soft start time (SS)
• TPS2121 Fast output switchover (tSW): 5 µs (typical) - Low Iq from enabled input: 200 µA (typical)
• Low Iq from disabled input: 10 µA (Typical)
• Manual input source selection (OVx)
• Over temperature protection (OTP)

Typical applications

• Building automation and surveillance / Tracking and telematics
• Multiple battery management
• EPOS and barcode scanners
• Backup and standby power / Input source selection

More information

• Datasheet
• IC product information