STEVAL-POE006V1

STEVAL-POE006V1 is a 3.3V/20A, active clamp forward converter, Power Over Ethernet (PoE) IEEE 802.3bt compliant reference design. This reference design is ideal for various applications including wireless access points, supplied 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 System in package integrating a double active bridge, a hot-swap MOSFET and a PoE-PD
• Supports legacy high power 4-pair applications
• 100V N-channel MOSFETs with 0.2ohm path resistance
• Identifies which PSE it is connected to, provides IEEE 802.3af/at/bt classification indication
• Smart operation mode selection through the STBY, FAUX and RAUX control signals
• PM8804 PWM peak current mode controller
• Input operating voltage up to 75V
• Programmable fixed frequency up to 1MHz
• Soft startup with settable time
• Dual 1Ap-k low side complementary gate drivers