Product overview
Description
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.
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All features
- IEEE 802.3at compliant PD interface
- Works with power supplied from Ethernet LAN cables or from local auxiliary sources
- Successful IEEE802.3at Layer1 classification indicator
- Integrated 100 V, 0.45 Ω, 1 A hot-swap MOSFET
- Accurate 140 mA typ. inrush current level
- Programmable classification current
- Programmable DC current limit up to 1 A
- Integrated high voltage start-up bias regulator
- Thermal shutdown protection
- Current mode pulse width modulator
- Programmable oscillator frequency
- 80% maximum duty cycle with internal slope compensation
- Support for flyback, forward, forward active clamp, flyback with synchronous rectification
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All resources
| Resource title | Version | Latest update |
|---|
Product Specifications (1)
| Resource title | Version | Latest update | ||
|---|---|---|---|---|
| 3.0 | 05 May 2016 | 05 May 2016 |
Application Notes (4)
| Resource title | Version | Latest update | ||
|---|---|---|---|---|
| 1.0 | 20 May 2024 | 20 May 2024 | ||
| 1.0 | 20 May 2024 | 20 May 2024 | ||
| 1.0 | 27 Jun 2014 | 27 Jun 2014 | ||
| 1.1 | 20 May 2024 | 20 May 2024 |
Design Notes & Tips (4)
| Resource title | Version | Latest update | ||
|---|---|---|---|---|
| 1.0 | 28 Jun 2024 | 28 Jun 2024 | ||
| 1.0 | 28 Jun 2024 | 28 Jun 2024 | ||
| 1.0 | 28 Jun 2024 | 28 Jun 2024 | ||
| 1.1 | 28 Jun 2024 | 28 Jun 2024 |
Application Notes for related Tools & Software (2)
| Resource title | Version | Latest update | ||
|---|---|---|---|---|
| 1.0 | 20 May 2024 | 20 May 2024 | ||
| 1.1 | 20 May 2024 | 20 May 2024 |
Flyers (1)
| Resource title | Version | Latest update | ||
|---|---|---|---|---|
| 3.1 | 01 Aug 2015 | 01 Aug 2015 |
Brochures (1)
| Resource title | Version | Latest update | ||
|---|---|---|---|---|
| 12.2024 | 09 Jan 2025 | 09 Jan 2025 |
EDA Symbols, Footprints and 3D Models
STMicroelectronics - PM8803
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Quality and Reliability
| Part Number | Marketing Status | Package | Grade | RoHS Compliance Grade | Longevity Commitment | Longevity Starting Date | Material Declaration** |
|---|---|---|---|---|---|---|---|
| PM8803 | Active | HTSSOP20 | Industrial | Ecopack2 | - | - | |
| PM8803TR | Active | HTSSOP20 | Industrial | Ecopack2 | - | - |
Marketing Status
Package
HTSSOP20
Grade
Industrial
RoHS Compliance Grade
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) | |||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM8803TR | | | Available at 2 distributors Distributor availability of PM8803TR
Distributor reported inventory date: 4/15/2025 | | | | Buy from Distributor | | |||||||||||||||||||||||||
| PM8803 | | | Available at 1 distributors Distributor availability of PM8803
Distributor reported inventory date: 4/15/2025 | | | | Buy from Distributor | |
PM8803TR Active
Part Number:
PM8803TR
MOUSER
Stock
2500Min.Order
1DIGIKEY
Stock
2135Min.Order
1Distributor reported inventory date: 4/15/2025
Stock
Min.Order
PM8803 Active
Part Number:
PM8803
MOUSER
Stock
190Min.Order
1Distributor reported inventory date: 4/15/2025
Stock
Min.Order
(*) 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