STMicroelectronics STEVAL-POE005V1 Evaluation Board

STMicroelectronics STEVAL-POE005V1 Evaluation Board is configured to evaluate the operation of the PM8804/5. The PM8804/5 is an IEEE 802.3bt PoE-PD interface with a system-in-package for smart power supplies. The PoE interface is based on the PM8805 PoE-PD interface, and a DC-DC forward active clamp converter is based on the PM8804 controller. The STMicroelectronics STEVAL-POE005V1 allows for easy verification of a PD interface compliant with the IEEE802.3bt standard based on PM8805 and of a DC-DC active clamp forward converter based on PM8804 controller. The STEVAL-POE005V1 Evaluation Board features a programmable oscillator for the switching frequency, adjustable slope compensation, dual complementary low-side drivers with programmable dead time and soft start, soft turn off, and a programmable current sense blanking time.

Features

PM8804
- PWM peak current mode controller
- Input operating voltage up to 75V
- Internal high voltage start-up regulator with 20mA capability
- Programmable fixed frequency up to 1Mhz
- Soft start-up with adjustable time
- Soft turn off (optionally disabled)
- Dual 1Apk, low-side complementary gate drivers
- GATE2 optionally turned off for reduced consumption
- 80% maximum duty cycle with internal slope compensation
- QFN 16 3x3mm package with exposed pad

PM8805
- System in package integrating a double active bridge, a hot-swap MOSFET, and a PoE-PD
- Supports legacy high-power, 4-pair applications
- 100 V N-ch MOSFETs with 0.2Ω total path resistance for each active bridge
- Identifies which kind of PSE (standard or legacy) is connected to and provides successful IEEE802.3 af/at/bt classification indication as a combination of the T0, T1, and T2 signals (open drain)
- Smart operational mode selection through the STBY, FAUX, and RAUX control signals
- QFN 56 8x8mm package with 43 pins and 6 exposed pads