PoE 5 V - 4 A PD converter based on the PM8803 IEEE802.3at compliant synchronous flyback controller
The STEVAL-TSP004V2 is a reference design for a PoE , high-efficiency, 5 V - 4 A flyback converter based on the PM8803 PoE controller. The PM8803 is a highly integrated device embedding an IEEE802.3at-compliant powered device (PD) interface together with a PWM controller and support for auxiliary sources.
The STEVAL-TSP004V2 reference design is based on an isolated flyback topology CCM converter featuring synchronous rectification with gate driver transformer.
The PM8803 integrates a standard compliant Power over Ethernet (PoE) interface and a current mode PWM controller to simplify the design of the power supply sections of all powered devices. The PoE/PoE interface incorporates all the functions required by the IEEE 802.3at including detection, classification, undervoltage lockout (UVLO) and in-rush current limitation.
Applications:
- VoIP phones, WLAN AP
- WiMAX CPEs
- Security cameras
- PoE/PoE Powered Device appliances
Features
- IEEE 802.3at compliant PD interface
- Works with power supplied from Ethernet LAN cables or from local auxiliary sources
- Line Input voltage range: 40 VDC to 60 VDC
- Output voltage: 5 VDC ± 5%
- Output current: 4 A
- Peak-to-peak output ripple: < 30 mV
- Efficiency DC-DC full-load: > 92%
- Overall peak efficiency: > 89%
- Transient response ΔVOUTPK-PK to 50% load step: < 170 mV
- ΔV in load line case: < 0.5%
Ships With
- Reference Board