EMC-compliant 10/100-Mbps Ethernet PHY reference design with IEEE802.3at Type-1 (≤ 12.95 W) PoE-PD
Description
This reference design provides a cost-optimized solution 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 also demonstrates 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-compliance tested for radiated emissions: ESDs and EFTs.
Features
- Based on low cost: low power consumption and small form-factor 10/100-Mbps Ethernet PHY DP83825 with RMII support and 150-m cable reach Efficient power delivery system via PoE using IEEE802.3at Type-1 PoE-PSE and PoE-PD Pre-compliance tested for radiated emission requirement: CISPR22/EN55022 - meets Class A and B limits; FCC Part 15 - meets Class A and B limits Pre-compliance 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
Applications
- Video doorbell
- Elevator main control panel
- Building security gateway
- Professional video camera
- Routing & transport systems for broadcast
- Piano
- keyboard & synthesizer
- Thermal imaging camera
- Data encoder/decoder (signage video transmitter card)
- IP network camera
- Professional audio mixer/control surface
- Wireless security camera
Product Categories
- Interface