TPS61122PWRG4

Product Overview

Category

The TPS61122PWRG4 belongs to the category of integrated circuits (ICs) and specifically falls under the category of boost converters.

Use

This IC is primarily used for driving white LEDs in display backlighting applications. It provides efficient power conversion and control for LED lighting systems.

Characteristics

• High efficiency: The TPS61122PWRG4 offers high efficiency power conversion, resulting in reduced power consumption and longer battery life.
• Wide input voltage range: It can operate with input voltages ranging from 2.7V to 18V, making it suitable for a variety of applications.
• Adjustable output current: The IC allows for adjustable output current to meet different LED brightness requirements.
• PWM dimming control: It supports pulse width modulation (PWM) dimming control, enabling precise control over LED brightness levels.
• Overvoltage protection: The TPS61122PWRG4 incorporates overvoltage protection to safeguard the LED system from potential damage.

Package and Quantity

The TPS61122PWRG4 is available in a small outline integrated circuit (SOIC) package. It comes in tape and reel packaging, with a quantity of 2500 units per reel.

Specifications

• Input Voltage Range: 2.7V to 18V
• Output Voltage Range: Up to 38V
• Maximum Output Current: 1A
• Switching Frequency: 1.2MHz
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The TPS61122PWRG4 has a total of 16 pins. Here is the detailed pin configuration:

1. EN (Enable)
2. FB (Feedback)
3. GND (Ground)
4. SW (Switch)
5. LX (Inductor Connection)
6. LX (Inductor Connection)
7. LX (Inductor Connection)
8. LX (Inductor Connection)
9. LX (Inductor Connection)
10. LX (Inductor Connection)
11. LX (Inductor Connection)
12. LX (Inductor Connection)
13. LX (Inductor Connection)
14. LX (Inductor Connection)
15. VOUT (Output Voltage)
16. VIN (Input Voltage)

Functional Features

• LED current regulation: The TPS61122PWRG4 provides precise regulation of LED current, ensuring consistent brightness levels.
• Soft start: It incorporates a soft start feature to prevent excessive inrush current during power-up, protecting the LEDs and the IC.
• Fault protection: The IC includes various fault protection mechanisms such as overvoltage protection, overcurrent protection, and thermal shutdown.

Advantages and Disadvantages

Advantages

• High efficiency power conversion
• Wide input voltage range for versatile applications
• Adjustable output current for flexible LED brightness control
• PWM dimming support for precise brightness adjustment
• Integrated fault protection mechanisms for enhanced reliability

Disadvantages

• Limited maximum output current of 1A may not be suitable for high-power LED applications
• Requires external components for proper operation, increasing overall system complexity

Working Principles

The TPS61122PWRG4 operates as a boost converter, converting a lower input voltage to a higher output voltage required for driving white LEDs. It utilizes a switching regulator topology to efficiently step up the input voltage. The IC controls the switching frequency and duty cycle to regulate the output voltage and current. By adjusting the feedback voltage, the desired LED current can be set, resulting in the desired brightness level.

Detailed Application Field Plans

The TPS61122PWRG4 finds extensive application in various areas, including: - Mobile devices: It is commonly used in smartphones, tablets, and portable media players for backlighting the display. - Automotive: The IC is employed in automotive infotainment systems and instrument clusters to provide efficient LED backlighting. - Industrial displays: It is utilized in industrial control panels, digital signage, and other display applications requiring reliable and adjustable LED backlighting.

Detailed and Complete Alternative Models

1. TPS61123PWRG4: Similar to TPS61122PWRG4, but with a higher maximum output current of 1.5A.
2. TPS61125PWRG4: Offers similar features as TPS61122PWRG4, but with an extended input voltage range up to 24V.
3. TPS61126PWRG4: Provides enhanced fault protection features compared to TPS61122PWRG4, including overtemperature protection and short-circuit protection.

These alternative models offer different specifications and features, allowing users to choose the most suitable option based on their specific requirements.

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