TPS2491DGSR

Product Overview

Category

The TPS2491DGSR belongs to the category of integrated circuits (ICs) and specifically falls under the power management ICs.

Use

This product is primarily used for hot swap controllers in various electronic systems. It enables safe insertion and removal of circuit boards or modules while the system remains powered.

Characteristics

• Hot swap capability: Allows for safe insertion and removal of circuit boards without disrupting the power supply.
• Overcurrent protection: Protects the system from excessive current flow during hot swapping.
• Fault detection: Monitors and detects faults such as overvoltage, undervoltage, and overtemperature conditions.
• Adjustable current limit: Provides flexibility to set the maximum allowable current for different applications.

Package

The TPS2491DGSR is available in a small 10-pin VSON package, which stands for Very Small Outline No-Lead. This package offers a compact form factor and efficient heat dissipation.

Essence

The essence of the TPS2491DGSR lies in its ability to facilitate safe hot swapping of circuit boards or modules in electronic systems, ensuring uninterrupted power supply and protecting against potential damage caused by excessive current or faults.

Packaging/Quantity

The TPS2491DGSR is typically sold in reels containing a quantity of 250 units per reel.

Specifications

• Input voltage range: 2.7V to 18V
• Operating temperature range: -40°C to +85°C
• Current limit range: 0.5A to 20A (adjustable)
• Fault reporting: Open-drain fault output pin
• Power dissipation: 1.25W (max)

Detailed Pin Configuration

The TPS2491DGSR features the following pin configuration:

1. EN (Enable): Controls the operation of the device.
2. FLT (Fault): Open-drain output pin that indicates the presence of a fault condition.
3. VCC: Power supply input pin.
4. GND: Ground reference pin.
5. ILIM (Current Limit): Sets the maximum allowable current limit.
6. IN (Input): Connects to the power source.
7. OUT (Output): Connects to the load.
8. SENSE: Voltage sense input pin.
9. FB (Feedback): Provides feedback for voltage regulation.
10. REF (Reference): Reference voltage input pin.

Functional Features

1. Hot Swap Control: The TPS2491DGSR enables controlled hot swapping of circuit boards or modules by gradually ramping up the output voltage, preventing inrush currents and minimizing system disturbances.
2. Overcurrent Protection: Monitors the current flowing through the load and limits it within the set threshold, protecting the system from damage caused by excessive current.
3. Fault Detection: Detects various fault conditions such as overvoltage, undervoltage, and overtemperature, triggering the FLT pin to indicate the presence of a fault.
4. Adjustable Current Limit: Allows users to set the maximum allowable current limit according to the specific requirements of their application.

Advantages and Disadvantages

Advantages

• Facilitates safe hot swapping of circuit boards without interrupting the power supply.
• Protects the system from overcurrent and various fault conditions.
• Adjustable current limit provides flexibility for different applications.
• Compact package size allows for space-efficient designs.

Disadvantages

• Limited to a maximum current limit of 20A, which may not be suitable for high-power applications.
• Requires careful consideration of thermal management due to power dissipation.

Working Principles

The TPS2491DGSR operates by monitoring the voltage across the sense resistor connected in series with the load. It compares this voltage with the reference voltage and adjusts the current limit accordingly. During hot swapping, it gradually ramps up the output voltage to prevent inrush currents and minimize disturbances to the system. If a fault condition is detected, such as overvoltage or overtemperature, the FLT pin is triggered to indicate the presence of a fault.

Detailed Application Field Plans

The TPS2491DGSR finds applications in various electronic systems that require hot swap capability and protection against overcurrent and fault conditions. Some specific application fields include:

1. Server Systems: Facilitating safe insertion and removal of server blades without interrupting the power supply.
2. Telecom Equipment: Enabling hot swapping of line cards or modules in telecom infrastructure.
3. Industrial Automation: Allowing for the replacement of faulty modules in industrial control systems without shutting down the entire system.
4. Data Storage Systems: Supporting the hot swapping of hard drives or storage modules in RAID systems.

Detailed and Complete Alternative Models

1. TPS2490DGSR: Similar to TPS2491DGSR but with a lower current limit range of 0.5A to 10A.
2. TPS2492DGSR: Similar to