TPS92515DGQT

Product Overview

Category

The TPS92515DGQT 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 various lighting applications, such as automotive lighting, architectural lighting, and general illumination.

Characteristics

• High efficiency: The TPS92515DGQT offers high efficiency power conversion, resulting in reduced energy consumption and improved overall system performance.
• Dimming control: It provides precise dimming control options, allowing for flexible adjustment of LED brightness.
• Thermal protection: The IC incorporates thermal protection features to prevent overheating and ensure safe operation.
• Wide input voltage range: It can operate with a wide input voltage range, making it suitable for different power supply configurations.
• Compact package: The TPS92515DGQT is available in a small form factor package, enabling space-efficient designs.

Package and Quantity

The TPS92515DGQT is packaged in a 10-pin VSSOP (Very Small Outline Package) format. It is typically supplied in reels, with a quantity of 2500 units per reel.

Specifications

• Input voltage range: 4.5V to 65V
• Output current: Up to 1.5A
• Switching frequency: Adjustable from 100kHz to 2MHz
• Dimming control: Analog or PWM (Pulse Width Modulation)
• Operating temperature range: -40°C to +125°C
• Efficiency: Up to 95%

Pin Configuration

The TPS92515DGQT has the following pin configuration:

1. VIN: Input voltage
2. GND: Ground
3. EN: Enable pin
4. DIM: Dimming control input
5. FB: Feedback pin
6. AGND: Analog ground
7. VCC: Supply voltage for internal circuitry
8. SW: Switch node connection
9. LX: Inductor connection
10. PGND: Power ground

Functional Features

• High-efficiency buck converter: The TPS92515DGQT integrates a high-efficiency buck converter that efficiently steps down the input voltage to drive the LEDs.
• Dimming control options: It supports both analog and PWM dimming control methods, allowing for precise adjustment of LED brightness.
• Protection features: The IC incorporates various protection mechanisms, including thermal shutdown, overvoltage protection, and overcurrent protection, ensuring safe operation and preventing damage to the system.
• Adjustable switching frequency: The switching frequency can be adjusted within a wide range, providing flexibility in optimizing efficiency and minimizing electromagnetic interference (EMI).
• Soft-start function: The TPS92515DGQT includes a soft-start feature that gradually ramps up the output voltage, reducing inrush current and improving system reliability.

Advantages and Disadvantages

Advantages

• High efficiency leads to reduced energy consumption.
• Precise dimming control allows for flexible lighting scenarios.
• Compact package enables space-efficient designs.
• Wide input voltage range accommodates different power supply configurations.
• Integrated protection features enhance system safety.

Disadvantages

• Limited output current capability compared to some other LED driver ICs.
• Requires external components for operation, which may increase overall system cost.

Working Principles

The TPS92515DGQT operates as a buck converter, converting the higher input voltage to a lower voltage suitable for driving LEDs. It utilizes pulse width modulation (PWM) techniques to control the output current and achieve dimming functionality. The IC regulates the output current by adjusting the duty cycle of the PWM signal based on the feedback received from the LEDs. This feedback is provided through the FB pin, enabling precise control of LED brightness.

Detailed Application Field Plans

The TPS92515DGQT finds applications in various lighting systems, including:

1. Automotive lighting: It can be used in automotive headlights, taillights, and interior lighting, providing efficient and controllable illumination.
2. Architectural lighting: The IC is suitable for architectural lighting installations, such as façade lighting, accent lighting, and landscape lighting, where high efficiency and dimming capabilities are desired.
3. General illumination: It can be employed in general lighting applications, including residential and commercial lighting, offering energy-efficient and adjustable lighting solutions.

Detailed and Complete Alternative Models

• TPS92518DGQR: Similar to the TPS92515DGQT, this IC is designed for driving high-power LEDs and offers comparable features and specifications.
• LT3799: This LED driver IC from Linear Technology provides similar functionality and performance characteristics, making it a viable alternative to the TPS92515DGQT.
• MAX16834: Another alternative, the MAX16834, is a high-brightness LED driver IC that shares similarities with the TPS92515DGQT in terms of features and application suitability.

(Note: The above