Overview
The TPS2391DGK is a hot swap power manager integrated circuit designed by Texas Instruments. It is optimized for use in nominal -48-V systems and is capable of handling supply voltage ranges from -36 V to -80 V, with transient ratings up to -100 V. This device is particularly useful for enabling live insertion of plug-in cards and modules in powered systems, providing essential features such as programmable current limit, current slew rate, and fault protection.
Key Specifications
| Parameter | Value |
|---|---|
| Input Supply Range | -36 V to -80 V |
| Transient Rating | Up to -100 V |
| Programmable Current Limit | Yes, via sense resistor value and external capacitor |
| Programmable Current Slew Rate | Yes, via sense resistor value and external capacitor |
| Enable Input (EN) | Yes |
| Fault Timer | Yes, to eliminate nuisance trips |
| Open-Drain Fault Output (FAULT) | Yes |
| Package Type | 8-Pin MSOP (VSSOP) |
| External Components Required | Few |
Key Features
- Wide input supply range: -36 V to -80 V with transient rating up to -100 V
- Programmable current limit and current slew rate using sense resistor value and a single external capacitor
- Enable input (EN) for control
- Fault timer to eliminate nuisance trips
- Open-drain fault output (FAULT) for single-line fault reporting
- Requires few external components
- 8-Pin MSOP package
- Auto retry feature in the event of a fault (unique to TPS2391)
Applications
- -48-V Distributed Power Systems
- Central Office Switching
- Wireless Base Station
Q & A
- What is the input supply range of the TPS2391DGK?
The input supply range of the TPS2391DGK is from -36 V to -80 V, with a transient rating up to -100 V.
- How is the current limit programmed in the TPS2391DGK?
The current limit is programmed using the sense resistor value and a single external capacitor.
- What is the purpose of the fault timer in the TPS2391DGK?
The fault timer is designed to eliminate nuisance trips by providing a delay before reporting a fault.
- How does the TPS2391DGK handle faults compared to the TPS2390?
The TPS2391DGK periodically retries the load in the event of a fault, whereas the TPS2390 latches off in response to current faults.
- What type of package does the TPS2391DGK come in?
The TPS2391DGK comes in an 8-Pin MSOP (VSSOP) package.
- What are some common applications for the TPS2391DGK?
Common applications include -48-V Distributed Power Systems, Central Office Switching, and Wireless Base Stations.
- Does the TPS2391DGK require many external components?
No, the TPS2391DGK requires few external components.
- How is the enable input (EN) used in the TPS2391DGK?
The enable input (EN) allows for control over the device, enabling or disabling it as needed.
- What is the function of the open-drain fault output (FAULT) in the TPS2391DGK?
The open-drain fault output (FAULT) provides single-line fault reporting.
- Can the TPS2391DGK be used for live insertion of plug-in cards and modules?
Yes, the TPS2391DGK is designed to enable live insertion of plug-in cards and modules in powered systems.
