STMicroelectronics PM8805
The PM8805 is a system-in-package for smart power supply of Power over Ethernet (PoE) Powered Devices (PD) and it is applicable for power level up to 99.9 W. It embeds: two active bridges and their driving circuitry, a charge pump to drive the high-side MOSFETs, the hot swap MOSFET and the interface compliant with IEEE 802.3bt. The device performs the physical layer classification, providing the indication of successful PSE type identification.| Part No. | PM8805 |
|---|---|
| Datasheet | PM8805 Download |
| Manufacturer |  STMicroelectronics |
| Description | IEEE 802.3bt PoE-PD interface |
| Buy | Stock & Price |
FEATURES
● Dual active bridge, hot swap MOSFET and PoE-PD interface in a system-inpackage● 100 V N-ch MOSFETs with 0.2 Ω total path resistance for each active bridge
● 100 V, 0.1 Ω high-side N-ch hot swap MOSFET
● PoE-PD single-signature interface compliant with IEEE 802.3bt / at / af
● Supports 4-pair PoE applications
● Supports 12 V auxiliary sources
● Identifies which kind of PSE (standard or legacy) is connected with and provides successful IEEE802.3bt / at / af classification indication as a combination of the T0, T1 and T2 signals (open drain)
● Smart operational modes
● Programmable classification current with 3.3 ms delay
● Optional Autoclass feature
● Advanced energy-saving MPS timings
● Two-step hot swap current protection: DC with 1 ms delay and short-circuit with 10 μs delay
● Controlled pre-charge of the output capacitor
● PGD signal (open drain) to enable an external PWM controller
● Thermal shutdown protection
APPLICATIONS
● High power wireless data systems● Security c...
