TPS92518QPWPTQ1 - English Editing Encyclopedia Entry

Product Overview

Category

The TPS92518QPWPTQ1 belongs to the category of integrated circuits (ICs) specifically designed for lighting applications.

Use

This product is primarily used for driving high-power LEDs in various lighting systems, such as automotive headlights, streetlights, and industrial lighting fixtures.

Characteristics

• High efficiency: The TPS92518QPWPTQ1 offers excellent power conversion efficiency, resulting in reduced energy consumption and improved overall system performance.
• Wide input voltage range: It can operate with a wide range of input voltages, making it suitable for different power supply configurations.
• Dimming capabilities: This IC supports various dimming techniques, including analog, PWM, and digital dimming, allowing for precise control of LED brightness.
• Protection features: The TPS92518QPWPTQ1 incorporates several protection mechanisms, such as overvoltage protection, overcurrent protection, and thermal shutdown, ensuring safe operation and preventing damage to the device and connected LEDs.

Package and Quantity

The TPS92518QPWPTQ1 is available in a small-sized, surface-mount package known as PowerPAD™ thermally enhanced, 24-pin HTSSOP (PW) package. It is typically sold in reels containing a specified quantity of units, commonly 250 or 300 pieces per reel.

Specifications

• Input voltage range: 4.5V to 65V
• Output current: Up to 2A
• Switching frequency: Adjustable from 100kHz to 2MHz
• Operating temperature range: -40°C to +125°C
• Dimming control: Analog, PWM, and digital dimming options
• Efficiency: Up to 95%

Detailed Pin Configuration

The TPS92518QPWPTQ1 has a total of 24 pins. The following table provides a detailed pin configuration:

| Pin Number | Pin Name | Description | |------------|----------|-------------| | 1 | VIN | Input voltage | | 2 | GND | Ground reference | | 3 | VCC | Supply voltage for internal circuitry | | 4 | EN | Enable pin for device operation | | 5 | DIM | Dimming control input | | 6-9 | NC | No connection | | 10 | FB | Feedback pin for regulating output voltage | | 11-12 | NC | No connection | | 13 | SW | Switch node for driving LEDs | | 14-15 | NC | No connection | | 16 | PGND | Power ground | | 17-19 | NC | No connection | | 20 | ISET | Current sense resistor connection | | 21-24 | NC | No connection |

Functional Features

The TPS92518QPWPTQ1 offers the following functional features:

1. High-efficiency LED driver: This IC efficiently converts the input voltage to drive high-power LEDs, minimizing power losses and maximizing energy savings.
2. Flexible dimming options: It supports various dimming techniques, allowing precise control over LED brightness levels.
3. Protection mechanisms: The device incorporates protection features like overvoltage, overcurrent, and thermal shutdown, ensuring safe operation and preventing damage to the device and LEDs.
4. Wide input voltage range: The TPS92518QPWPTQ1 can operate with a wide range of input voltages, making it suitable for different lighting applications.
5. Compact package: The small-sized HTSSOP package enables space-efficient integration into lighting systems.

Advantages and Disadvantages

Advantages

• High efficiency leads to reduced energy consumption and improved system performance.
• Wide input voltage range allows for versatile application in various power supply configurations.
• Multiple dimming options provide flexibility in controlling LED brightness.
• Incorporation of protection features ensures safe operation and prevents damage to the device and LEDs.
• Compact package enables space-efficient integration into lighting systems.

Disadvantages

• Limited output current capability may not be suitable for driving very high-power LEDs or multiple LED strings simultaneously.
• The complex pin configuration may require careful attention during circuit design and PCB layout.

Working Principles

The TPS92518QPWPTQ1 operates as a buck LED driver, converting the higher input voltage to a regulated lower voltage suitable for driving high-power LEDs. It utilizes a switching regulator topology to efficiently control the LED current. The device adjusts the duty cycle of the internal switch based on the feedback received from the FB pin, ensuring a constant output current. Dimming control is achieved by modulating the duty cycle using the DIM pin input signal.

Detailed Application Field Plans

The TPS92518QPWPTQ1 finds extensive application in