Overview
The PM8803CTR, produced by STMicroelectronics, is a high-efficiency integrated Power over Ethernet (PoE) interface and current mode PWM controller. This component is designed to simplify the power supply sections of powered devices, ensuring compliance with IEEE 802.3at standards. It integrates all necessary functions for PoE/PoE+ interfaces, including detection, classification, undervoltage lockout (UVLO), and inrush current limitation. The PM8803CTR can operate with power from either the Ethernet cable or an external auxiliary source, prioritizing the auxiliary source. It supports various DC-DC converter topologies such as flyback, forward, forward with active clamp, and synchronous rectification, making it versatile for different application needs.
Key Specifications
| Parameter | Value |
|---|---|
| Package | 20-HTSSOP (0.173", 4.40mm Width) Exposed Pad |
| Marketing Status | Active |
| Grade | Industrial |
| RoHS Compliance Grade | Ecopack2 |
| Operating Temperature | -40°C to 85°C |
| Power - Max | 25.5W |
| Standards | IEEE 802.3at (PoE+), IEEE 802.3af (PoE) |
| Integrated Switch(s) | Both |
| Internal Temperature Sensor | Yes |
| Programmable Oscillator Frequency | Yes |
| Maximum Duty Cycle | 80% with internal slope compensation |
Key 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 typical inrush current level
- Programmable classification current and DC current limit up to 1 A
- Integrated high voltage start-up bias regulator
- Thermal shutdown protection
- Current mode pulse width modulator
- Support for flyback, forward, forward active clamp, and synchronous rectification converters
Applications
The PM8803CTR is suitable for a variety of applications, including industrial equipment, personal electronics, and any device that requires efficient power delivery over Ethernet. It is particularly useful in scenarios where high-efficiency power conversion is necessary, such as in network devices, VoIP phones, wireless access points, and security cameras.
Q & A
- What is the PM8803CTR and what does it do?
The PM8803CTR is a high-efficiency integrated Power over Ethernet (PoE) interface and current mode PWM controller, designed to simplify the power supply sections of powered devices. - What standards does the PM8803CTR comply with?
The PM8803CTR complies with IEEE 802.3at (PoE+) and IEEE 802.3af (PoE) standards. - What types of DC-DC converters does the PM8803CTR support?
The PM8803CTR supports flyback, forward, forward with active clamp, and synchronous rectification converters. - What is the operating temperature range of the PM8803CTR?
The operating temperature range is -40°C to 85°C. - Does the PM8803CTR have thermal shutdown protection?
Yes, it includes thermal shutdown protection. - Can the PM8803CTR work with power from both Ethernet and external sources?
Yes, it can work with power from either the Ethernet cable or an external auxiliary source, prioritizing the auxiliary source. - What is the maximum power handling capability of the PM8803CTR?
The maximum power handling capability is 25.5W. - Is the PM8803CTR RoHS compliant?
Yes, the PM8803CTR is RoHS compliant with an Ecopack2 grade. - What package type does the PM8803CTR come in?
The PM8803CTR comes in a 20-HTSSOP (0.173", 4.40mm Width) Exposed Pad package. - Does the PM8803CTR have an integrated hot-swap MOSFET?
Yes, it includes an integrated 100 V, 0.45 Ω, 1 A hot-swap MOSFET.
