The PM8803 integrates a 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/PoE+ interface includes all functions required by the IEEE 802.3at as well as detection, classification, undervoltage lockout (UVLO) and inrush current limitation.
The PM8803 specifically performs IEEE802.3at Layer 1 hardware classification, providing the system with an indication of Type 2 PSE successful detection.
The PM8803 has been designed to work with power either from the Ethernet cable or from an external power source such as a wall adapter, ensuring the priority of the auxiliary source over the PoE. The DC-DC section of the PM8803 features a programmable oscillator frequency, an adjustable slope compensation, dual complementary low-side drivers, programmable dead time and an internal temperature sensor.
The PM8803 targets high-efficiency conversion under all load conditions supporting flyback, forward, forward with active clamp converters and synchronous rectification.
|DS7139: High-efficiency, IEEE 802.3at compliant integrated PoE-PD interface and PWM controller||3.0||1 MB|
|AN4006: Designing a high-efficiency (60 W on 4 pairs) PoE converter using the PM8803 and an external current booster||1.0||3 MB|
|AN3373: IEEE802.3at compliant PD + PS design based on PM8803 low power, synchronous flyback PoE converter||1.0||1 MB|
|AN3387: PM8803 layout guidelines||1.0||944 KB|
|AN4473: PoE synchronous flyback, IEEE802.3at compliant, 5V - 4A PD converter based on the PM8803 controller||1.1||2 MB|
|PM8803: Integrated PoE+ PD interface and PWM controller||3.1||216 KB|
|Brochure Power management guide||09.2017||4 MB|
|型号||Package||Packing Type||Marketing Status||Unit Price (US$) *||Quantity||ECCN (EU)||ECCN (US)||Country of Origin||More info||Order from ST||Order from Distributors|
|PM8803TR||HTSSOP20||Tape And Reel||Active : Product is in volume production||-||-||NEC||EAR99||MALAYSIA||MORE INFO||DISTRIBUTOR AVAILABILITY|
|PM8803||HTSSOP20||Tube||Active : Product is in volume production||-||-||NEC||EAR99||MALAYSIA||MORE INFO||No availability reported, please contact our Sales office|
|型号||Marketing Status||Package||Grade||RoHS Compliance Grade||Material Declaration**|
(**) 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.