PM8803CTR

Overview

The PM8803CTR is a highly integrated Power over Ethernet (PoE) Powered Device (PD) interface and PWM controller manufactured by STMicroelectronics. It complies with IEEE 802.3at standards, integrating a hot-swap MOSFET with 100V rating, 0.45 Ohm on-resistance, and 1A current limit. The device features a current mode PWM controller with programmable oscillator frequency, adjustable slope compensation, dual complementary low-side drivers, and programmable dead time. It supports auxiliary power sources with priority logic and includes thermal shutdown protection.

Feature Summary

• Integrates an IEEE 802.3at compliant PD interface with Layer 1 hardware classification indicator
• Includes an internal 100 V, 0.45 Ω, 1 A hot-swap MOSFET for inrush current limitation
• Features a current mode PWM controller supporting flyback, forward, and synchronous rectification topologies
• Provides auxiliary source priority management and thermal shutdown protection

Applications

• IEEE 802.3at compliant PoE powered devices requiring high-efficiency conversion
• Flyback converter designs with synchronous rectification for PoE applications
• Systems utilizing both Ethernet LAN cables and local auxiliary power sources
• Point-of-sale and retail logistics devices requiring robust power management

Procurement Notes

Verify the specific suffix 'CTR' against the official datasheet to confirm tape-and-reel packaging status, as standard listings may indicate tube packaging. Ensure the component matches the exact voltage and current ratings required for your IEEE 802.3at design. Cross-reference the manufacturer part number with authorized distributors to avoid counterfeit components. Confirm RoHS compliance details if restricted substance regulations apply to your region.

Selection Notes

Select this component when designing PoE interfaces that require integrated detection, classification, and DC-DC conversion in a single package. It is suitable for applications needing auxiliary power input with automatic priority switching. Consider its compatibility with flyback and forward topologies. Evaluate the programmable parameters against your efficiency and ripple requirements. Ensure the operating temperature range meets your environmental specifications.

Part Context

The PM8803 belongs to STMicroelectronics' portfolio of PoE controllers designed to simplify powered device development. It combines the Ethernet interface and PWM control functions, reducing bill of materials count. This integration supports various converter topologies, enabling designers to achieve high efficiency across different load conditions while maintaining compliance with industry standards.

Replacement Considerations

Check for direct pin-to-pin replacements within the same product family. Verify that any substitute maintains IEEE 802.3at compliance and similar hot-swap characteristics. Ensure the alternative component supports the required auxiliary source priority logic and topology options.