Overview
The TPS2493, produced by Texas Instruments, is a high-voltage hot swap controller designed to safely manage the insertion and removal of power supplies in high-voltage systems. This 14-pin device operates over a wide voltage range of 9-V to 80-V, making it versatile for various applications. It features a high-side drive for an external N-channel FET, enabling precise control over load current. The TPS2493 includes programmable power limit, current limit, and fault timer, ensuring the external FET and the load are protected from overcurrent conditions. Additional features such as inrush current limiting, controlled load turn-on, and power feed protection enhance its functionality and reliability.
Key Specifications
| Parameter | Description | Value |
|---|---|---|
| Operating Voltage Range | 9-V to 80-V | 9 V to 80 V |
| High-Side Drive | For External N-FET | Yes |
| Programmable FET Power Limit | Adjustable power limit | Programmable |
| Programmable Load Current Limit | Adjustable current limit | Programmable |
| Programmable Fault Timer | Adjustable fault timer period | Programmable |
| Load Current Monitor Output | Analog current monitor signal | VIMON = 48 x (VVCC-SENSE) |
| Power Good and Fault Outputs | Active low outputs | Yes |
| Enable/UV, OV Inputs | Low input inhibits GATE, overvoltage sensing | Yes |
| Latch or Auto Restart After Fault | Latch or auto restart mode | Yes |
| Package | TSSOP (PW) | 14 pins |
Key Features
- High-Voltage Operation: Operates from 9-V to 80-V, making it suitable for a wide range of high-voltage applications.
- Programmable Power Limit: Ensures the external FET operates within its safe operating area (SOA) during overload conditions.
- Programmable Current Limit and Fault Timer: Protects the supply, external FET, and load from overcurrent conditions.
- Inrush Current Limiting: Controls the initial current surge during power-up.
- Controlled Load Turn-On: Manages the turn-on sequence to prevent voltage spikes and ensure smooth operation.
- Interfacing to Down-Stream DC-to-DC Converters: Coordinates with downstream converters for efficient power management.
- Power Feed Protection: Protects against power feed issues such as overvoltage and undervoltage.
- Analog Current Monitor Output: Provides a signal for external A/D conversion, allowing real-time current monitoring.
- Programmable Overvoltage and Undervoltage Shutdown: Customizable thresholds for overvoltage and undervoltage protection.
- Power Good and Fault Indicators: Active low outputs for power good and fault conditions, facilitating system monitoring.
Applications
- Data Centers and Servers: Hot swap controllers are crucial in data centers for safe and efficient power management during server insertion and removal.
- Telecommunications Equipment: Used in telecom systems to manage power supplies and ensure reliable operation.
- Industrial Power Systems: Suitable for industrial environments where high-voltage power management is necessary.
- Medical Equipment: Ensures safe and reliable power supply in medical devices.
- Aerospace and Defense: Used in aerospace and defense applications where robust and reliable power management is critical.
Q & A
- What is the operating voltage range of the TPS2493?
The TPS2493 operates over a voltage range of 9-V to 80-V.
- What type of FET does the TPS2493 drive?
The TPS2493 drives an external N-channel FET.
- Can the power limit and current limit be programmed on the TPS2493?
Yes, both the power limit and current limit can be programmed.
- What is the purpose of the analog current monitor output?
The analog current monitor output provides a signal for real-time current monitoring, suitable for sampling with an external A/D converter.
- How does the TPS2493 handle fault conditions?
The TPS2493 has a programmable fault timer and can either latch off or auto restart after a fault, depending on the configuration.
- What are the power good and fault outputs used for?
The power good and fault outputs are active low outputs used to indicate the status of the power supply and any fault conditions.
- Can the TPS2493 be used in high-temperature environments?
Yes, the TPS2493 operates over a temperature range of -40°C to 125°C.
- What package type is the TPS2493 available in?
The TPS2493 is available in a 14-pin TSSOP (PW) package.
- Does the TPS2493 support inrush current limiting?
Yes, the TPS2493 includes inrush current limiting to control the initial current surge during power-up.
- How does the TPS2493 protect against overvoltage and undervoltage conditions?
The TPS2493 has programmable overvoltage and undervoltage shutdown features to protect against these conditions.
