STEVAL-POE005V1

STEVAL-POE005V1 is a 12V/8A, active clamp forward converter, Power Over Ethernet (PoE) IEEE 802.3bt compliant reference design. This reference design represents a converter solution ideal for various applications including building safety and security or surveillance, with a PoE-PD interface and a DC-DC active clamp forward converter. The PoE-PD interface is based on the PM8805 system in package device with two active bridges and an IEEE 802.3bt compliant Powered Device (PD) interface. It can be used in all medium-to-high power 2P and 4P high efficiency PoE and PoE+ applications. The DC-DC active clamp forward converter is designed around the PM8804 PWM controller, which is an integrated solution for smart and efficient 48V converters, featuring a programmable oscillator for the switching frequency, adjustable slope compensation, dual complementary low-side drivers with programmable dead time, programmable soft start, soft turn off and a programmable current sense blanking time.

• PM8805 PoE-PD interface system in package
• Supports legacy high power 4-pair applications
• 100V N-channel MOSFETs with 0.2ohm total path resistance
• IEEE802.3 af/at/bt classification indication
• Smart operational mode selection through the STBY, FAUX and RAUX control signals
• PM8804 PWM peak current mode controller
• Input operating voltage up to 75V (PM8804)
• Programmable fixed frequency up to 1MHz (PM8804)
• Soft startup with adjustable time and soft turn off (optionally disabled) (PM8804)
• Dual 1 Ap-k low-side complementary gate drivers (PM8804)