Overview
The PM8800A, produced by STMicroelectronics, is an integrated power over Ethernet (PoE) interface and current mode PWM controller. This device simplifies the design of the power supply sections of all powered devices, particularly those requiring extended power beyond the limits of the IEEE 802.3af standard. The PM8800A incorporates a standard PoE interface with functions such as detection, classification, under-voltage lockout (UVLO), and in-rush current limitation. It also features a hot-swap MOSFET capable of sustaining up to 800 mA and supports power from both Ethernet LAN cables and external auxiliary sources like AC adapters.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| VIN, GND to VSS | -0.3 to 100 | V |
| AUXI_IRL to VSS | -0.3 to 100 | V |
| DCCL, RCLASS to VSS | -0.3 to 3.6 | V |
| COMP, SS to AGND | -0.3 to 3.6 | V |
| VFB, RT, CS to AGND | -0.3 to 3.6 | V |
| VCC, GD to AGND | -0.3 to 15 | V |
| nPGD to AGND | -0.3 to 15 | V |
| Operating Temperature (°C) | -40 to 85 | °C |
| Maximum Junction Temperature | 150 | °C |
| Package | HTSSOP16 | |
| RoHS Compliance Grade | Ecopack2 |
Key Features
- IEEE 802.3af compliant PD interface
- Integrated 100 V, 0.5 Ω, 800 mA hot-swap MOSFET
- Programmable in-rush current limit and DC current limit up to 800 mA
- Current mode pulse width modulator
- Programmable oscillator frequency and soft-start
- Thermal shutdown protection
- Power good indication
- Supports both isolated and non-isolated applications
- High voltage start-up bias regulator
- Integrated signature resistor
Applications
- VoIP phones
- WLAN access points
- Security cameras
- PoE powered device appliances
- High power (>12.95 W) powered devices
- Industrial applications
Q & A
- What is the PM8800A used for? The PM8800A is used to simplify the design of power supply sections in powered devices, especially those requiring extended power beyond the IEEE 802.3af standard.
- Is the PM8800A IEEE 802.3af compliant? Yes, the PM8800A is IEEE 802.3af compliant and includes features such as detection, classification, UVLO, and in-rush current limitation.
- What type of MOSFET is integrated into the PM8800A? The PM8800A integrates a 100 V, 0.5 Ω, 800 mA hot-swap MOSFET.
- Can the PM8800A work with external power sources? Yes, the PM8800A can work with power supplied from either Ethernet LAN cables or from local auxiliary sources like AC adapters.
- What are the programmable features of the PM8800A? The PM8800A has programmable in-rush current limit, DC current limit, oscillator frequency, and soft-start.
- Does the PM8800A support both isolated and non-isolated applications? Yes, it supports both isolated and non-isolated applications.
- What is the operating temperature range of the PM8800A? The operating temperature range is -40 to 85 °C.
- What package type is the PM8800A available in? The PM8800A is available in the HTSSOP16 package.
- Is the PM8800A RoHS compliant? Yes, the PM8800A is RoHS compliant with an Ecopack2 grade.
- What are some common applications of the PM8800A? Common applications include VoIP phones, WLAN access points, security cameras, and high power powered devices.
