TPS2491DGS - English Editing Encyclopedia Entry

Product Overview

Category

The TPS2491DGS belongs to the category of integrated circuits (ICs) and specifically falls under the power management ICs.

Use

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

Characteristics

• The TPS2491DGS is designed to protect sensitive components from voltage surges during hot swapping.
• It provides overcurrent protection, preventing damage to the system in case of a short circuit or excessive load.
• This IC offers precise current limiting capabilities, ensuring stable and reliable operation.
• It supports a wide input voltage range, making it suitable for various applications.
• The TPS2491DGS features a low quiescent current, minimizing power consumption.

Package and Essence

The TPS2491DGS is available in a small surface-mount package known as the MSOP-10. Its compact size allows for easy integration into space-constrained designs. The essence of this IC lies in its ability to facilitate safe and efficient hot swapping of electronic components.

Packaging/Quantity

The TPS2491DGS is typically sold in reels or tubes, with each reel containing 2500 units or each tube containing 98 units.

Specifications

• Input Voltage Range: 2.7V to 18V
• Operating Temperature Range: -40°C to 85°C
• Quiescent Current: 50µA (typical)
• Overcurrent Threshold Accuracy: ±5%
• Maximum Continuous Current: 3A
• Fault Reporting: Open Drain Output

Detailed Pin Configuration

The TPS2491DGS has ten pins arranged as follows:

```

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| | --| VCC GND |-- Pin 1: Ground --| EN FLT |-- Pin 2: Fault Output --| IN OUT |-- Pin 3: Output Voltage --| ILIM NC |-- Pin 4: Not Connected --| VREF NC |-- Pin 5: Not Connected --| ISET NC |-- Pin 6: Not Connected --| NC GATE |-- Pin 7: Gate Drive Output --| NC SENSE|-- Pin 8: Current Sense Input --| NC VIN |-- Pin 9: Input Voltage |___________| ```

Functional Features

• Hot Swap Control: The TPS2491DGS enables safe insertion and removal of circuit boards or modules by controlling the power flow during these operations.
• Overcurrent Protection: It provides protection against excessive current, preventing damage to the system in case of a short circuit or high load conditions.
• Precise Current Limiting: The IC offers accurate current limiting capabilities, ensuring that the system operates within safe limits.
• Fault Reporting: The fault output pin provides an indication when an overcurrent or other fault condition occurs.

Advantages and Disadvantages

Advantages

• Enables safe hot swapping of electronic components.
• Provides overcurrent protection, safeguarding the system from damage.
• Precise current limiting ensures stable operation.
• Wide input voltage range allows for versatile applications.
• Low quiescent current minimizes power consumption.

Disadvantages

• Limited maximum continuous current (3A).
• Requires additional external components for complete functionality.

Working Principles

The TPS2491DGS works by monitoring the current flowing through the sense resistor connected to the current sense pin. When the current exceeds a set threshold, the IC reacts by limiting the current flow or shutting down the power path altogether. This prevents damage to the system and protects sensitive components during hot swapping.

Detailed Application Field Plans

The TPS2491DGS finds applications in various fields, including: - Server and data center power distribution systems - Telecommunications equipment - Industrial automation systems - Automotive electronics - Power supply units

Detailed and Complete Alternative Models

• TPS2490DGS: Similar to TPS2491DGS but with a lower maximum continuous current of 2A.
• TPS2492DGS: Similar to TPS2491DGS but with a higher maximum continuous current of 4A.
• LTC4226: Hot swap controller with integrated power MOSFETs for higher current applications.
• MAX5943: Hot swap controller with integrated current sense amplifier and fault reporting features.

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