TPS92002D

Product Overview

Category

The TPS92002D belongs to the category of integrated circuits (ICs) and specifically falls under the power management ICs.

Use

This IC is primarily used for driving high-power LEDs in lighting applications. It provides efficient control and regulation of LED current, ensuring optimal performance and longevity of the LEDs.

Characteristics

• High efficiency: The TPS92002D offers high efficiency power conversion, minimizing energy losses and maximizing overall system efficiency.
• Dimming capability: It supports dimming functionality, allowing users to adjust the brightness of the LEDs according to their requirements.
• Thermal protection: The IC incorporates thermal protection mechanisms to prevent overheating and ensure safe operation.
• Wide input voltage range: It can operate with a wide input voltage range, making it suitable for various lighting applications.
• Compact package: The TPS92002D is available in a compact package, enabling easy integration into lighting fixtures.

Package and Quantity

The TPS92002D is typically packaged in a small outline package (SOP) or a dual flat no-leads (DFN) package. The exact package type may vary depending on the manufacturer. It is commonly supplied in reels or tubes, with quantities ranging from a few hundred to several thousand units per package.

Specifications

• Input voltage range: 4.5V to 60V
• Output current range: Up to 1A
• Efficiency: Up to 95%
• Dimming control: Analog or PWM
• Operating temperature range: -40°C to 125°C
• Package dimensions: 5mm x 6mm (SOP), 3mm x 3mm (DFN)

Detailed Pin Configuration

The TPS92002D has a standard pin configuration with the following pins:

1. VIN: Input voltage pin
2. GND: Ground pin
3. VCC: Power supply pin for internal circuitry
4. DIM: Dimming control pin
5. FB: Feedback pin for regulating LED current
6. SW: Switching node pin
7. LX: Inductor connection pin
8. EN: Enable pin for turning the IC on/off

Functional Features

1. Constant current regulation: The TPS92002D ensures a stable and accurate LED current, regardless of input voltage variations or temperature changes.
2. Dimming control: It allows for smooth dimming of LEDs using either analog or pulse width modulation (PWM) signals.
3. Over-temperature protection: The IC incorporates thermal shutdown mechanisms to prevent damage due to excessive heat.
4. Under-voltage lockout (UVLO): It includes UVLO functionality to protect against low input voltage conditions.
5. Soft-start capability: The TPS92002D features a soft-start function that gradually ramps up the LED current, reducing stress on the LEDs during power-up.

Advantages and Disadvantages

Advantages

• High efficiency power conversion leads to energy savings.
• Wide input voltage range enables versatile application possibilities.
• Dimming capability allows for flexible lighting control.
• Compact package facilitates easy integration into lighting fixtures.
• Thermal protection ensures safe operation and prolongs LED lifespan.

Disadvantages

• Limited output current range may not be suitable for high-power LED applications.
• Requires external components such as inductors and capacitors for proper operation.

Working Principles

The TPS92002D operates based on a buck converter topology. It regulates the LED current by adjusting the duty cycle of the internal switching transistor. The feedback mechanism continuously monitors the LED current and adjusts the duty cycle accordingly to maintain a constant current output. The dimming control signal modulates the duty cycle, allowing for brightness adjustment.

Detailed Application Field Plans

The TPS92002D is widely used in various lighting applications, including:

1. Residential lighting: It can be employed in LED bulbs, downlights, and ceiling fixtures for energy-efficient and dimmable lighting solutions.
2. Commercial lighting: The IC finds application in office spaces, retail stores, and hotels, providing efficient and controllable illumination.
3. Outdoor lighting: Streetlights, landscape lighting, and architectural lighting benefit from the TPS92002D's high efficiency and thermal protection features.
4. Automotive lighting: The IC can be utilized in automotive headlights, taillights, and interior lighting systems, ensuring reliable and adjustable illumination.

Detailed and Complete Alternative Models

1. TPS92001D: Similar to the TPS92002D, but with a lower output current capability of up to 500mA.
2. TPS92003D: Offers higher output current capacity of up to 2A, suitable for driving high-power LEDs.
3. TPS92004D: Provides additional features such as integrated fault protection and diagnostics for enhanced system reliability.

These alternative models offer different specifications and functionalities, allowing users to choose the