TPS25921AD - English Editing Encyclopedia Entry

Product Overview

Category

The TPS25921AD belongs to the category of electronic components, specifically power management integrated circuits (PMICs).

Use

This product is primarily used for overvoltage and overcurrent protection in various electronic systems.

Characteristics

• Overvoltage and overcurrent protection
• Low quiescent current
• Fast response time
• Wide input voltage range
• Adjustable overvoltage threshold
• Thermal shutdown protection

Package

The TPS25921AD is available in a small outline package (SOP) with 8 pins.

Essence

The essence of the TPS25921AD lies in its ability to safeguard electronic systems from potential damage caused by overvoltage and overcurrent conditions.

Packaging/Quantity

The TPS25921AD is typically packaged in reels or tubes, with quantities varying based on customer requirements.

Specifications

• Input Voltage Range: 2.7V to 18V
• Overvoltage Threshold Range: 2.9V to 18V
• Quiescent Current: 10µA (typical)
• Operating Temperature Range: -40°C to +85°C
• Output Current Limit: 3.5A (typical)

Detailed Pin Configuration

The TPS25921AD features the following pin configuration:

1. EN (Enable): Controls the device's operation.
2. IN (Input): Connects to the power source.
3. OUT (Output): Connects to the load.
4. GND (Ground): Common reference point for the device.
5. OV (Overvoltage): Sets the threshold for overvoltage protection.
6. ILIM (Current Limit): Sets the threshold for overcurrent protection.
7. FLT (Fault): Indicates the occurrence of a fault condition.
8. PG (Power Good): Indicates the output voltage is within the acceptable range.

Functional Features

• Overvoltage Protection: Monitors the input voltage and disconnects the load when it exceeds the set threshold.
• Overcurrent Protection: Monitors the output current and limits it to a safe level in case of excessive load.
• Fast Response Time: Quickly detects and responds to overvoltage and overcurrent conditions, minimizing potential damage.
• Adjustable Thresholds: Allows customization of the overvoltage and overcurrent protection levels.
• Thermal Shutdown Protection: Automatically shuts down the device if the temperature exceeds the specified limit, preventing overheating.

Advantages and Disadvantages

Advantages

• Robust protection against overvoltage and overcurrent events.
• Low quiescent current consumption, ensuring minimal power loss during normal operation.
• Wide input voltage range enables compatibility with various power sources.
• Adjustable thresholds provide flexibility for different system requirements.
• Compact package size allows for easy integration into space-constrained designs.

Disadvantages

• Limited output current capacity may not be suitable for high-power applications.
• Lack of advanced features such as fault logging or communication interfaces.

Working Principles

The TPS25921AD operates by continuously monitoring the input voltage and output current. When an overvoltage or overcurrent condition is detected, the device quickly disconnects the load from the power source, protecting the downstream circuitry. The adjustable thresholds allow designers to set the desired protection levels based on their specific application requirements. Additionally, the thermal shutdown feature ensures that the device shuts down if the temperature exceeds the specified limit, preventing any potential damage due to overheating.

Detailed Application Field Plans

The TPS25921AD finds applications in various electronic systems where protection against overvoltage and overcurrent events is crucial. Some potential application fields include:

1. Power Supplies: Used in AC/DC adapters, battery chargers, and power banks to safeguard the connected devices from voltage spikes and excessive current.
2. Industrial Automation: Integrated into control systems, motor drives, and PLCs to protect sensitive components from potential damage caused by electrical faults.
3. Automotive Electronics: Employed in automotive power distribution modules, infotainment systems, and lighting controls to ensure reliable operation under varying load conditions.
4. Consumer Electronics: Incorporated into smartphones, tablets, and laptops to prevent damage due to faulty charging cables or power surges.

Detailed and Complete Alternative Models

1. TPS25940 - Similar functionality with higher output current capacity (up to 5A).
2. TPS25982 - Offers additional features such as adjustable slew rate control and fault reporting.
3. TPS25925 - Provides overvoltage and overcurrent protection with a lower quiescent current (5µA typical).

These alternative models offer different specifications and features, allowing designers to choose the most suitable option based on their specific application requirements.

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