Overview
The NCP1090DG, part of ON Semiconductor’s Power over Ethernet (PoE) Powered Device (PoE-PD) product family, integrates an IEEE 802.3af certified interface controller. This component is designed to support various PoE applications, ensuring compliance with the IEEE 802.3af standard. It incorporates all necessary functions such as detection, classification, under-voltage lockout, inrush, and operational current limit. The NCP1090DG is fabricated in a robust high-voltage process and features a rugged vertical N-channel DMOS, making it suitable for demanding environments and capable of withstanding harsh conditions like hot swap and cable ESD events.
Key Specifications
| Parameter | Description | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| Input Supply Voltage (VPORT) | Input supply voltage range | 0 | - | 57 | V |
| Operational Current Limit | Current limit with Rinrush = 178 kΩ | 425 | 500 | 575 | mA |
| Inrush Current Limit | Inrush current with Rinrush = 95.3 kΩ | 75 | 120 | 170 | mA |
| Pass-switch Rds-on | Pass-switch on-resistance | - | 0.5 | 1 | Ω |
| UVLO Turn On Voltage | Default turn on voltage | 37 | - | 40 | V |
| UVLO Turn Off Voltage | Default turn off voltage | 29.6 | - | 31 | V |
| Industrial Temperature Range | Operating temperature range | -40 | - | 85 | °C |
| Junction Temperature | Full operation up to | - | - | 125 | °C |
| Package Type | Package type | - | - | SOIC-8 | - |
Key Features
- Fully supports IEEE 802.3af specifications, allowing for up to 15W of power.
- Certified interoperability between PoE devices.
- 500 mA operational current limit and 130 mA inrush current limit.
- Open-drain power good indicator to ensure proper enabling/disabling of the DC-DC converter.
- Over-temperature protection and industrial temperature range of -40°C to 85°C.
- Vertical N-channel DMOS pass switch for robustness and high reliability.
- Hot-swap capability and resistance to cable ESD events.
Applications
- Wireless access points.
- Voice over IP products.
- IP cameras.
- WiMax and WiFi devices.
- Motor control systems.
- Industrial devices, including those requiring high-voltage interfacing such as stepper motor drivers and CAN bus drivers.
Q & A
- What is the NCP1090DG and what standard does it support?
The NCP1090DG is a Power over Ethernet (PoE) Powered Device (PoE-PD) interface controller that fully supports the IEEE 802.3af standard.
- What is the maximum power the NCP1090DG can handle?
The NCP1090DG can handle up to 15W of power as per the IEEE 802.3af specifications.
- What are the key functions integrated into the NCP1090DG?
The NCP1090DG integrates detection, classification, under-voltage lockout, inrush, and operational current limit functions.
- What type of DMOS is used in the NCP1090DG?
The NCP1090DG uses a vertical N-channel DMOS pass switch, which offers the robustness of discrete MOSFETs.
- What is the operational temperature range of the NCP1090DG?
The operational temperature range is -40°C to 85°C, with full operation up to a junction temperature of 125°C.
- Does the NCP1090DG have over-temperature protection?
Yes, the NCP1090DG includes over-temperature protection.
- What is the purpose of the power good indicator in the NCP1090DG?
The power good indicator ensures the proper enabling/disabling of the DC-DC converter by indicating when the DC-DC converter input capacitor is fully charged.
- Can the NCP1090DG handle hot-swap and ESD events?
Yes, the NCP1090DG is designed to withstand hot-swap and cable ESD events.
- What are some common applications of the NCP1090DG?
Common applications include wireless access points, Voice over IP products, IP cameras, WiMax and WiFi devices, and motor control systems.
- What package type is the NCP1090DG available in?
The NCP1090DG is available in an SOIC-8 package.
