STMicroelectronics STEVAL-POE006V1 Evaluation Board
STMicroelectronics STEVAL-POE006V1 Evaluation Board evaluates a Powered Device (PD) interface compliant with the IEEE802.3bt standard based on the PM8805 IEEE 802.3bt PoE-PD interface. In addition to this, this STMicroelectronics evaluation board evaluates a DC-DC forward active clamp converter based on the PM8804 peak current mode controller. The STEVAL-POE006V1 evaluation board features a programmable oscillator for the switching frequency, adjustable slope compensation, and dual complementary low-side drivers with programmable dead time. This evaluation board also incorporates a programmable soft start, soft turn-off, and a programmable current sense blanking time. The PM8805 voltage controller is a highly integrated device embedding two active bridges and an IEEE802.3bt compliant PD interface. The PM8804 PWM controller integrates all the circuitry required to design a smart and efficient 48V converter. The STEVAL-POE006V1 evaluation board is designed for high-efficiency conversion across wide load ranges.
Features
- PM8805 voltage controller
- System in package integrating a double active bridge, a hot-swap MOSFET, and a PoE-PD
- Supports legacy high-power and 4-pair applications
- 100V N-ch MOSFETs with 0.2Ω total path resistance for each active bridge
- Identifies which kind of PSE (standard or legacy) it 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 operation mode selection through the STBY, FAUX, and RAUX control signals
- QFN 56 8mm x 8mm package with 43 pins and 6 exposed pads
- PM8804 power switch IC
- PWM peak current mode controller
- Up to 75V input operating voltage
- Internal high voltage start-up regulator with 20mA capability
- Up to 1MHz programmable fixed frequency
- Soft start-up with settable time
- Soft turn off (optionally disabled)
- Dual 1APK low-side complementary gate drivers
- GATE2 can be turned off for reduced consumption
- 80% maximum duty cycle with internal slope compensation
- QFN 16 3mm x 3mm package with exposed pad
Power Over Ethernet Block Diagram
Additional Resource
Associated Products
STMicroelectronics PM8804 Power Switch IC
Integrates all the circuitry required to design a smart and efficient 48V converter.
STMicroelectronics PM8805 IEEE 802.3bt PoE-PD Interface
A system-in-package for smart power supplies that is applicable for power levels up to 99.9W.
Published: 2019-03-07
| Updated: 2024-02-07