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TPS61121PWR
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TPS61121PWR

Product Overview

Category

The TPS61121PWR belongs to the category of integrated circuits (ICs) and specifically falls under the power management ICs.

Use

This IC is primarily used for driving white LEDs in backlighting applications, such as LCD displays in various electronic devices.

Characteristics

  • High efficiency boost converter
  • Adjustable output voltage
  • Wide input voltage range
  • Low shutdown current
  • Overvoltage protection
  • Thermal shutdown protection

Package

The TPS61121PWR is available in a small outline integrated circuit (SOIC) package.

Essence

The essence of the TPS61121PWR lies in its ability to efficiently drive white LEDs, providing optimal backlighting for LCD displays.

Packaging/Quantity

The TPS61121PWR is typically packaged in reels, with 2500 units per reel.

Specifications

  • Input Voltage Range: 2.7V to 18V
  • Output Voltage Range: 4V to 28V
  • Maximum Output Current: 1A
  • Switching Frequency: 1.2MHz
  • Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The TPS61121PWR has a total of 8 pins:

  1. VIN: Input voltage pin
  2. GND: Ground pin
  3. FB: Feedback pin for adjusting output voltage
  4. EN: Enable pin for turning the IC on/off
  5. VOUT: Output voltage pin
  6. SW: Switching pin for connecting the inductor
  7. LX: Inductor connection pin
  8. PGND: Power ground pin

Functional Features

  1. High Efficiency: The TPS61121PWR utilizes a high-efficiency boost converter, ensuring minimal power loss during operation.
  2. Adjustable Output Voltage: The feedback pin allows for precise adjustment of the output voltage according to the specific requirements.
  3. Wide Input Voltage Range: The IC can handle a wide range of input voltages, making it suitable for various applications.
  4. Overvoltage Protection: The TPS61121PWR incorporates overvoltage protection to safeguard the LEDs from excessive voltage levels.
  5. Thermal Shutdown Protection: In case of excessive temperature, the IC automatically shuts down to prevent damage.

Advantages and Disadvantages

Advantages

  • High efficiency operation
  • Adjustable output voltage for flexibility
  • Wide input voltage range for versatility
  • Built-in overvoltage and thermal protection

Disadvantages

  • Limited maximum output current (1A)
  • Requires external components for complete functionality

Working Principles

The TPS61121PWR operates as a boost converter, converting the input voltage to a higher output voltage required for driving white LEDs. It utilizes a switching mechanism to efficiently regulate the voltage and control the LED brightness. The feedback pin allows for precise adjustment of the output voltage, ensuring optimal backlighting performance.

Detailed Application Field Plans

The TPS61121PWR finds extensive application in various electronic devices that require LCD displays with efficient backlighting. Some common application fields include: - Mobile phones and smartphones - Tablets and laptops - Portable gaming consoles - Automotive infotainment systems - Industrial control panels

Detailed and Complete Alternative Models

  1. TPS61122PWR: Similar to TPS61121PWR but with a higher maximum output current of 1.5A.
  2. TPS61123PWR: Similar to TPS61121PWR but with an extended input voltage range up to 24V.
  3. TPS61124PWR: Similar to TPS61121PWR but with additional features like adjustable switching frequency.

These alternative models offer similar functionality with slight variations to cater to specific requirements.

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Listen Sie 10 häufige Fragen und Antworten im Zusammenhang mit der Anwendung von TPS61121PWR in technischen Lösungen auf

Sure! Here are 10 common questions and answers related to the application of TPS61121PWR in technical solutions:

  1. Q: What is TPS61121PWR? A: TPS61121PWR is a step-up DC-DC converter IC designed for driving white LEDs in series.

  2. Q: What is the input voltage range of TPS61121PWR? A: The input voltage range of TPS61121PWR is typically between 2.7V and 18V.

  3. Q: What is the maximum output current that TPS61121PWR can handle? A: TPS61121PWR can handle a maximum output current of 30mA.

  4. Q: Can TPS61121PWR be used to drive RGB LEDs? A: No, TPS61121PWR is specifically designed for driving white LEDs and may not be suitable for RGB LEDs.

  5. Q: Does TPS61121PWR have built-in over-temperature protection? A: Yes, TPS61121PWR has built-in thermal shutdown protection to prevent overheating.

  6. Q: Can TPS61121PWR operate in a dimming mode? A: Yes, TPS61121PWR supports PWM dimming control for adjusting the brightness of the LEDs.

  7. Q: What is the typical efficiency of TPS61121PWR? A: The typical efficiency of TPS61121PWR is around 85% to 90%.

  8. Q: Is TPS61121PWR suitable for battery-powered applications? A: Yes, TPS61121PWR has a low quiescent current and can be used in battery-powered applications.

  9. Q: Can TPS61121PWR handle a wide temperature range? A: Yes, TPS61121PWR is designed to operate in a temperature range of -40°C to 85°C.

  10. Q: What package does TPS61121PWR come in? A: TPS61121PWR is available in a small 8-pin TSSOP package for easy integration into compact designs.

Please note that the answers provided here are general and may vary depending on the specific application and requirements. It is always recommended to refer to the datasheet and consult with the manufacturer for detailed information.