TPS92551TZ/NOPB

Product Overview

Category

The TPS92551TZ/NOPB 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 automotive lighting, street lighting, and general illumination.

Characteristics

• High efficiency: The TPS92551TZ/NOPB offers high efficiency power conversion, resulting in reduced energy consumption and improved overall system performance.
• Wide input voltage range: It can operate with input voltages ranging from 4.5V to 65V, making it suitable for various power supply configurations.
• Adjustable output current: The device allows for precise control of the LED current, enabling flexibility in designing different lighting setups.
• Dimming capabilities: It supports both analog and PWM dimming, providing options for adjusting the brightness of the LEDs.
• Over-temperature protection: The IC incorporates thermal shutdown circuitry to prevent damage due to excessive heat.

Package

The TPS92551TZ/NOPB is available in a small outline package (SOT-23), which facilitates easy integration into compact designs.

Essence

The essence of the TPS92551TZ/NOPB lies in its ability to efficiently drive high-power LEDs while offering flexibility in terms of input voltage range, output current control, and dimming options.

Packaging/Quantity

The TPS92551TZ/NOPB is typically supplied in tape and reel packaging, with a quantity of 3000 units per reel.

Specifications

• Input Voltage Range: 4.5V to 65V
• Output Current Range: Up to 1A
• Dimming Control: Analog and PWM
• Operating Temperature Range: -40°C to 125°C
• Efficiency: Up to 95%
• Thermal Shutdown Temperature: 150°C

Detailed Pin Configuration

The TPS92551TZ/NOPB features a 6-pin SOT-23 package with the following pin configuration:

1. VIN: Input voltage
2. GND: Ground
3. EN: Enable pin (active high)
4. DIM: Dimming control input
5. FB: Feedback pin for regulating output current
6. SW: Switch node connection for driving LEDs

Functional Features

• High-efficiency buck converter topology for LED driving applications.
• Integrated power MOSFET for reduced external component count.
• Adjustable output current through feedback control.
• Wide input voltage range for versatile power supply configurations.
• Analog and PWM dimming control options for brightness adjustment.
• Over-temperature protection to prevent damage due to excessive heat.

Advantages and Disadvantages

Advantages

• High efficiency leads to reduced energy consumption.
• Wide input voltage range allows for flexible power supply design.
• Precise control of LED current enables customization of lighting setups.
• Dimming capabilities provide options for adjusting brightness.
• Integrated thermal shutdown circuitry protects against overheating.

Disadvantages

• Limited maximum output current of 1A may not be suitable for high-power LED applications requiring higher currents.
• SOT-23 package may limit heat dissipation in certain high-power applications.

Working Principles

The TPS92551TZ/NOPB operates as a buck converter, converting the input voltage to a regulated output current for driving high-power LEDs. The integrated power MOSFET switches the current through the LEDs, while the feedback control loop adjusts the duty cycle to maintain the desired output current. Dimming control can be achieved by modulating the duty cycle using either analog or PWM signals. The IC also incorporates over-temperature protection, which shuts down the device if the temperature exceeds the specified threshold.

Detailed Application Field Plans

The TPS92551TZ/NOPB finds applications in various lighting scenarios, including:

1. Automotive Lighting: Used for driving high-power LEDs in automotive headlights, taillights, and interior lighting.
2. Street Lighting: Enables efficient and reliable LED-based street lighting systems with adjustable brightness levels.
3. General Illumination: Suitable for indoor and outdoor lighting applications, such as residential, commercial, and architectural lighting.

Detailed and Complete Alternative Models

• TPS92550TZ/NOPB
• TPS92552TZ/NOPB
• TPS92553TZ/NOPB
• TPS92554TZ/NOPB
• TPS92555TZ/NOPB

These alternative models offer similar functionality and characteristics to the TPS92551TZ/NOPB, providing options for different power requirements and design considerations.

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