Overview
The Texas Instruments TPS2378DDA is a Power Over Ethernet (PoE) controller designed to implement IEEE 802.3at Type-2 powered devices (PD). This 8-pin integrated circuit is packaged in a PowerPAD HSOP package, which enhances thermal dissipation and allows the controller to handle up to 0.85 A of continuous current. The TPS2378DDA is ideal for devices such as IP cameras, wireless access points, and VoIP phones, providing efficient power delivery, thermal protection, and various PoE configuration support.
Key Specifications
| Category | Description |
|---|---|
| Package | HSOIC (DDA) - 8 pins |
| Operating Temperature Range | -40°C to 85°C |
| Input Voltage | 33-57 V |
| Output Current | Up to 850 mA |
| Power - Max | 25.5 W |
| Internal Switch(s) | Yes, 0.5-Ω internal switch |
| Standards | IEEE 802.3at (PoE+), IEEE 802.3af (PoE) |
| Supply Current | 285 µA |
| System-level ESD Capability | 15 kV and 8 kV |
Key Features
- IEEE 802.3at Type-2 Hardware Classification with Status Flag
- Adapter Priority Input (APD) for external power adapter priority
- DC/DC Converter Enable
- Robust 100 V, 0.5-Ω Hotswap MOSFET
- Operating Current up to 850 mA and 1-A (Typical) Operating Current Limit
- 15 kV and 8 kV System-level ESD Capability
- PowerPAD HSOP Package for enhanced thermal dissipation
- 100-V pass transistor, 140-mA inrush current limiting, and type-2 indication
- Auto-retry fault protection and open-drain power-good output
Applications
The TPS2378DDA is used in various Power-over-Ethernet (PoE) applications, including:
- IP cameras
- Wireless access points
- VoIP phones
- Other devices requiring efficient power delivery and thermal protection
Q & A
- What is the TPS2378DDA used for?
The TPS2378DDA is used to implement IEEE 802.3at Type-2 powered devices (PD) in Power-over-Ethernet (PoE) applications.
- What is the package type of the TPS2378DDA?
The TPS2378DDA is packaged in an HSOIC (DDA) - 8 pin package, also known as PowerPAD HSOP Package.
- What are the key features of the TPS2378DDA?
Key features include IEEE 802.3at Type-2 hardware classification, adapter priority input, DC/DC converter enable, robust hotswap MOSFET, and system-level ESD capability.
- What is the operating temperature range of the TPS2378DDA?
The operating temperature range is -40°C to 85°C.
- What is the maximum output current of the TPS2378DDA?
The maximum output current is up to 850 mA.
- Does the TPS2378DDA support external power adapters?
Yes, it features an auxiliary power detect (APD) input for prioritizing external power adapters.
- What protection features does the TPS2378DDA have?
The device includes thermal shutdown, current limit foldback, and robust 100-V internal switch protection.
- Is the TPS2378DDA RoHS compliant?
The RoHS compliance status of the TPS2378DDA is not explicitly stated, but it is recommended to check with the distributor for the latest information.
- Where can I find additional documentation for the TPS2378DDA?
Additional datasheets, footprints, and schematics can be found on the Texas Instruments website or through authorized distributors.
- What are some equivalent products to the TPS2378DDA?
Equivalent products include the TPS2375, TPS2376, TPS2377, TPS2386, and TPS2396, though each may have unique characteristics.
