Product overview
Description
The PM8800A integrates a standard power over Ethernet (PoE) interface and a current mode PWM controller to simplify the design of the power supply sections of all powered devices.
The PoE interface incorporates all the functions required by the IEEE 802.3af including detection, classification, under-voltage lockout (UVLO) and in-rush current limitation.
PM8800A specifically targets PD with extended power requirement with respect to the limit imposed by the 802.3af standard, embedding a hot-swap MOSFET capable of sustaining twice the current of the 802.3af standard with a programmable DC current limit.
The integrated switching regulator has been designed to work with power either form the Ethernet cable connection or from an external power source such as AC adapter.
The DC-DC section of the PM8800A features a programmable oscillator frequency, soft-start, slope compensation and embeds a voltage output error amplifier allowing use in both isolated and non isolated configuration.
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All features
- Current mode pulse width modulator
- Thermal shutdown protection
- Programmable soft-start
- Programmable oscillator frequency
- 80% maximum duty cycle with internal slope compensation
- Power good indication
- Supports both isolated and non-isolated applications.
- Programmable DCcurrent limit up to 800 mA
- Programmable classification current
- IEEE 802.3af compliant PD interface
- Integrated 100V, 0. 5Ω, 800mA Hot-Swap MOSFET
- Works with power supplied from Ethernet LAN cables or from local auxiliary sources
- Programmable in-rush current limit
- High voltage start-up bias regulator
- Integrated signature resistor
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EDA Symbols, Footprints and 3D Models
STMicroelectronics - PM8800
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Quality and Reliability
| Part Number | Marketing Status | Package | Grade | RoHS Compliance Grade | Material Declaration** |
|---|---|---|---|---|---|
| PM8800A | NRND | HTSSOP16 | Industrial | Ecopack2 | |
| PM8800ATR | NRND | HTSSOP16 | Industrial | Ecopack2 |
(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.
Sample & Buy
| Part Number | Marketing Status | Budgetary Price (US$)*/Qty | Order from ST | Order from distributors | Package | Packing Type | RoHS | Country of Origin | ECCN (US) | ECCN (EU) | Operating Temperature (°C) (min) | Operating Temperature (°C) (max) | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM8800ATR | | | distributors No availability of distributors reported, please contact our sales office | ||||||||||
| PM8800A | | | distributors No availability of distributors reported, please contact our sales office |
PM8800ATR NRND
PM8800A NRND
(*) Suggested Resale Price (USD) per defined quantity for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office or our Distributors