Overview
The TPS2377DR-1G4 is a Power over Ethernet (PoE) Powered Device (PD) Controller from Texas Instruments. This integrated circuit is designed to comply with the IEEE 802.3af standard and supports legacy power sourcing equipment. It is part of the TPS2375 family, which features advanced functionalities for PoE applications.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Voltage Range (VDD, RTN, DET, PG) | -0.3 | 100 | V | |
| UVLO Voltage (VDD rising) | 34.1 | 35.1 | 36.0 | V |
| UVLO Voltage (VDD falling) | 29.7 | 30.5 | 31.4 | V |
| Inrush Current Limit | 100 | 130 | 180 | mA |
| Current Limit (RTN) | 405 | 461 | 515 | mA |
| On Resistance (RTN) | 0.58 | 1.0 | Ω | |
| Operating Temperature Range | -40 | 85 | °C | |
| Package Type | 8-Pin SOIC and TSSOP |
Key Features
- Fully supports IEEE 802.3af specification with legacy thresholds for the TPS2377-1.
- Integrated 0.58-Ω, 100-V, low-side switch.
- Open-drain, power-good reporting.
- Adjustable inrush current control.
- Overtemperature protection.
- Industrial temperature range: -40°C to 85°C.
- Auto-retry after current-limit fault.
- 15-kV system level ESD capable.
Applications
- VoIP Phones.
- WLAN Access Points.
- Security Cameras.
- Internet Appliances.
- POS Terminals.
Q & A
- What is the TPS2377DR-1G4 used for? The TPS2377DR-1G4 is used as a Power over Ethernet (PoE) Powered Device (PD) Controller, complying with IEEE 802.3af and supporting legacy power sourcing equipment.
- What are the key features of the TPS2377DR-1G4? Key features include integrated low-side switch, open-drain power-good reporting, adjustable inrush current control, overtemperature protection, and industrial temperature range.
- What is the operating temperature range of the TPS2377DR-1G4? The operating temperature range is -40°C to 85°C.
- What types of packages are available for the TPS2377DR-1G4? The device is available in 8-Pin SOIC and TSSOP packages.
- What is the purpose of the PG pin in the TPS2377DR-1G4? The PG pin is an open-drain, power-good output that indicates when the device is powered and operational.
- How does the TPS2377DR-1G4 handle inrush current? The device includes an adjustable inrush current limiting feature to prevent the bulk capacitor from causing the line voltage to sag below the lower UVLO threshold.
- What are some common applications for the TPS2377DR-1G4? Common applications include VoIP phones, WLAN access points, security cameras, internet appliances, and POS terminals.
- Does the TPS2377DR-1G4 support auto-retry after a fault? Yes, the device includes an auto-retry feature after a current-limit fault.
- What is the maximum current limit for the RTN pin? The maximum current limit for the RTN pin is 515 mA.
- Is the TPS2377DR-1G4 ESD protected? Yes, the device is 15-kV system level ESD capable.
