Overview
The TPS2491DGSR is a positive high-voltage hot swap controller manufactured by Texas Instruments. This device is designed to safely drive an external N-channel MOSFET switch, providing comprehensive protection and control for various high-voltage applications. The TPS2491DGSR features programmable power and current limiting, ensuring the MOSFET operates within a safe operating area (SOA) under harsh conditions. It is particularly useful in applications requiring inrush current limiting, electronic circuit breaker protection, and controlled load turn-on. The device is available in a small, space-saving 10-pin VSSOP package, reducing the number of external components and saving board space.
Key Specifications
| Parameter | Value |
|---|---|
| Package | VSSOP (DGS) - 10 pins |
| Operating Temperature Range | -40°C to 85°C |
| Operating Voltage Range | 9 V to 80 V |
| Power Limiting | Programmable |
| Current Limiting | Programmable |
| Gate Drive | High-Side Drive for Low-RDS(on) External N-channel MOSFET |
| Fault Timer | Programmable Fault Timer |
| Power Good Output | Open-Drain Output for Downstream DC/DC Coordination |
| Enable Pin | Can be used as Programmable Undervoltage Lockout or Logic Control |
Key Features
- Programmable Power Limiting and Current Limiting for Complete Safe Operating Area (SOA) Protection
- Wide Operating Range: 9 V to 80 V
- Latched Operation (TPS2490) and Automatic Retry (TPS2491)
- High-Side Drive for Low-RDS(on) External N-channel MOSFET
- Programmable Fault Timer to Protect the MOSFET and Eliminate Nuisance Shutdowns
- Power Good Open-Drain Output for Downstream DC/DC Coordination
- Enable Can Be Used as a Programmable Undervoltage Lockout or Logic Control
- Small, Space-Saving 10-pin VSSOP Package
- Calculator Tool Available (TPS2490/91 Design-in Calculator, SLVC033)
Applications
- Server Backplanes
- Storage Area Networks (SAN)
- Medical Systems
- Plug-In Modules
- Base Stations
- Inrush Current Limiting
- Electronic Circuit Breaker Protection
- Controlled Load Turn-On
- Interfacing to Downstream DC-to-DC Converters
- Power Feed Protection
Q & A
- What is the operating voltage range of the TPS2491DGSR?
The operating voltage range of the TPS2491DGSR is from 9 V to 80 V.
- What type of package does the TPS2491DGSR come in?
The TPS2491DGSR comes in a 10-pin VSSOP (DGS) package.
- What are the key protection features of the TPS2491DGSR?
The TPS2491DGSR features programmable power and current limiting, ensuring the MOSFET operates within a safe operating area (SOA). It also includes a programmable fault timer and power good output.
- Can the TPS2491DGSR be used for automatic retry operations?
- What is the purpose of the power good output in the TPS2491DGSR?
The power good output is an open-drain output used for downstream DC/DC converter coordination and monitoring circuits.
- How does the TPS2491DGSR handle inrush current limiting?
The TPS2491DGSR controls inrush current to the load upon insertion of a circuit card into a live backplane, minimizing voltage sag and dV/dt effects on other circuits.
- What are some common applications of the TPS2491DGSR?
- How does the enable pin function in the TPS2491DGSR?
- Is there a calculator tool available for designing with the TPS2491DGSR?
- What is the significance of the small package size of the TPS2491DGSR?
