TPS92002DGK

Product Overview

Category

The TPS92002DGK belongs to the category of integrated circuits (ICs) used in power management applications.

Use

This IC is specifically designed for driving high-power LEDs in lighting applications, such as streetlights, automotive lighting, and general illumination.

Characteristics

• High efficiency: The TPS92002DGK offers high efficiency power conversion, resulting in reduced energy consumption.
• Dimming capability: It supports various dimming techniques, allowing for flexible control of LED brightness.
• Thermal protection: The IC incorporates thermal shutdown and over-temperature protection features to ensure safe operation.
• Wide input voltage range: It can operate with input voltages ranging from 4.5V to 65V, making it suitable for a wide range of applications.
• Compact package: The TPS92002DGK is available in a small form factor package, enabling space-efficient designs.

Package and Quantity

The TPS92002DGK is packaged in a small MSOP-8 package. It is typically sold in reels containing 2500 units.

Specifications

• Input Voltage Range: 4.5V to 65V
• Output Current: Up to 2A
• Switching Frequency: Adjustable up to 1MHz
• Dimming Control: Analog or PWM
• Operating Temperature Range: -40°C to 125°C

Pin Configuration

The TPS92002DGK has the following pin configuration:

___________ | | EN |1 8| VCC DIM |2 7| GND FB |3 6| SW CS |4 5| COMP |___________|

Functional Features

• Constant current regulation: The TPS92002DGK ensures a stable output current to drive LEDs, regardless of input voltage variations.
• Over-voltage protection: It incorporates over-voltage protection circuitry to safeguard the LED load from excessive voltage levels.
• Soft-start functionality: The IC gradually ramps up the output current during startup, preventing inrush current and ensuring a smooth power-up sequence.
• Fault detection and reporting: The TPS92002DGK can detect various fault conditions, such as open or shorted LEDs, and provide corresponding fault indication signals.

Advantages and Disadvantages

Advantages

• High efficiency leads to energy savings.
• Wide input voltage range allows for versatile applications.
• Compact package enables space-efficient designs.
• Dimming capability provides flexibility in controlling LED brightness.

Disadvantages

• Limited output current capacity (up to 2A).
• Requires external components for operation.

Working Principles

The TPS92002DGK operates as a buck converter, converting the input voltage to a regulated constant current output suitable for driving LEDs. It utilizes a pulse-width modulation (PWM) control scheme to regulate the output current. The IC adjusts the duty cycle of the PWM signal based on the feedback received from the current sense resistor (CS). This feedback loop ensures that the desired constant current is maintained, even with varying input voltages.

Detailed Application Field Plans

The TPS92002DGK finds extensive application in the following areas:

1. Street lighting: The IC's high efficiency and dimming capabilities make it ideal for street lighting systems, enabling energy savings and adaptive lighting control.
2. Automotive lighting: It is well-suited for automotive lighting applications, providing efficient and reliable LED driving solutions for headlights, taillights, and interior lighting.
3. General illumination: The TPS92002DGK can be used in various general illumination scenarios, including residential, commercial, and industrial lighting, offering efficient and controllable LED lighting solutions.

Detailed and Complete Alternative Models

1. TPS92001DGK: Similar to the TPS92002DGK, but with a lower output current capacity of 1A.
2. TPS92003DGK: A higher-output-current version of the TPS92002DGK, capable of driving up to 3A.
3. TPS92004DGK: This model offers additional features such as fault protection and diagnostics, suitable for demanding lighting applications.

Note: The above alternative models are from the same product family and share similar characteristics and pin configurations.

In conclusion, the TPS92002DGK is an integrated circuit designed for high-power LED driving applications. Its high efficiency, dimming capabilities, and compact package make it a versatile choice for various lighting systems. However, it has limitations in terms of output current capacity and requires external components for operation.