This reference design is optimized for 10 to 100 Mbps using the low-power Ethernet physical layer (PHY) DP83825 supporting 150-m reach over CAT5e cable which is beyond the standard Ethernet distance limitation of 100 m (328 feet). This design has power delivery over Ethernet cable along with data communication using IEEE802.3at Type-1 (13 W) PoE-PD TPS23755 device with integrated primary-side regulated flyback DC/DC controller. This reference design is pre-compliant tested for radiated emissions, ESDs and EFTs.
Features
- Based on cost efficiency, low-power consumption and small form-factor 10 to 100-Mbps Ethernet PHY DP83825 with RMII support and 150-m cable reach
- Efficient power delivery via PoE using IEEE802.3at Type-1 PoE-PSE and PoE-PD
- Pre-compliant tested for radiated emission requirements
- CISPR22/EN55022 meets Class A and B limits
- FCC Part 15 meets Class A and B limits
- Pre-compliant tested for conducted immunity requirements
- ±12-kV contact discharge and ±15-kV air discharge ESD IEC 61000-4-2 meets criterion B
- ±2-kV IO capacitive coupling EFT per IEC 61000-4-4 meets criterion B
- External isolation transformer with common-mode choke on PHY side for improved EMI and EMC performance
- Programmable LED support for link and activity