Overview
The NCP1083DEG, produced by ON Semiconductor, is a highly integrated and robust Power over Ethernet (PoE) Powered Device (PoE-PD) interface and DC-DC converter controller. It is part of the HIPO™ Power over Ethernet Powered Device product family, designed to support demanding medium and high power Ethernet applications. The NCP1083 combines an enhanced PoE-PD interface that supports both IEEE 802.3af and the IEEE 802.3at standards, along with a flexible and configurable DC-DC converter controller. This device enables smooth transitions from non-PoE to PoE-enabled networks and supports power from auxiliary sources such as AC power adapters and battery supplies, eliminating the need for a second switching power supply.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| VPORTP Input Power Supply | -0.3 | - | 72 | V |
| RTN, ARTN Analog Ground Supply | -0.3 | - | 72 | V |
| VDDH Internal Regulator Output | -0.3 | - | 17 | V |
| VDDL Internal Regulator Output | -0.3 | - | 3.6 | V |
| UVLO Turn On Voltage | 38 | 40 | - | V |
| UVLO Turn Off Voltage | 29.5 | 32 | - | V |
| Oscillator Frequency Range | 100 | - | 500 | kHz |
| Maximum Duty Cycle | - | - | 80% | - |
| Operational Current Limit | - | - | 1100 mA | - |
| Temperature Range | -40 | - | 85 | °C |
Key Features
- Supports IEEE 802.3af and IEEE 802.3at standards, as well as proprietary high power PoE applications up to 40 W.
- Flexible auxiliary power supply support with input down to 9 V DC.
- Programmable operational current limit up to 1100 mA and programmable classification current.
- Integrated current mode DC-DC controller supporting isolated and non-isolated fly-back, forward, and buck converter topologies.
- Programmable switching frequency, duty cycle up to 80%, slope compensation, and soft start-up.
- Robust high voltage process with a rugged vertical N-channel DMOS and low loss current sense technique.
- Improved robustness against cable ESD, reaching more than 4 kV on HBM and 3 kV for C-ESD.
- Over-temperature protection and industrial temperature range from -40°C to 85°C with full operation up to 150°C junction temperature.
Applications
- Industrial Ethernet devices
- PTZ and Dome IP cameras
- RFID readers
- MIMO WLAN access points
- High-end VoIP phones
- Notebooks
- Point of sale systems
- High power industrial equipment
Q & A
- What standards does the NCP1083 support?
The NCP1083 supports both IEEE 802.3af and IEEE 802.3at standards, as well as proprietary high power PoE applications.
- What is the maximum power delivery of the NCP1083?
The NCP1083 can deliver up to 25.5 W for the IEEE 802.3at standard and up to 40 W for proprietary high power PoE applications).
- What types of DC-DC converter topologies does the NCP1083 support?
The NCP1083 supports isolated and non-isolated fly-back, forward, and buck converter topologies).
- What is the operational current limit of the NCP1083?
The NCP1083 has a programmable operational current limit up to 1100 mA).
- How robust is the NCP1083 against ESD events?
The NCP1083 is highly robust against ESD events, reaching more than 4 kV on HBM and 3 kV for C-ESD).
- What is the temperature range of the NCP1083?
The NCP1083 operates within an industrial temperature range from -40°C to 85°C with full operation up to 150°C junction temperature).
- Does the NCP1083 support auxiliary power supplies?
Yes, the NCP1083 supports auxiliary power supplies with input down to 9 V DC).
- What are some common applications of the NCP1083?
Common applications include industrial Ethernet devices, PTZ and Dome IP cameras, RFID readers, MIMO WLAN access points, high-end VoIP phones, and notebooks).
- What is the package type of the NCP1083DEG?
The NCP1083DEG is packaged in a 20-pin TSSOP (Thin Shrink Small Outline Package)).
- Is the NCP1083 Pb-Free?
Yes, the NCP1083 is a Pb-Free device).
