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LT3952IFE#PBF
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LT3952IFE#PBF

Product Overview

Category: Integrated Circuit (IC)

Use: LED Driver

Characteristics: - High efficiency - Wide input voltage range - Dimming control - Fault protection features

Package: 28-Lead TSSOP

Essence: The LT3952IFE#PBF is a high-efficiency LED driver IC designed for driving multiple LEDs in series. It provides a constant current output, making it suitable for various lighting applications.

Packaging/Quantity: The LT3952IFE#PBF is available in a 28-Lead Thin Shrink Small Outline Package (TSSOP). It is typically sold in reels of 2500 units.

Specifications

  • Input Voltage Range: 4V to 60V
  • Output Current Range: Up to 1.5A
  • Switching Frequency: Up to 2MHz
  • Dimming Control: Analog/PWM
  • Fault Protection: Overvoltage, Overcurrent, and Overtemperature

Pin Configuration

The LT3952IFE#PBF has a total of 28 pins. Here is the detailed pin configuration:

  1. VIN: Input voltage
  2. GND: Ground
  3. VCC: Supply voltage for internal circuitry
  4. VREF: Reference voltage output
  5. FB: Feedback pin for regulating output current
  6. ADJ: Adjust pin for setting the LED current
  7. DIM: Dimming control input
  8. PWM: Pulse Width Modulation input
  9. SYNC: Synchronization input
  10. SS: Soft-start capacitor connection
  11. RT: Timing resistor connection for switching frequency control
  12. CT: Timing capacitor connection for switching frequency control
  13. SW: Switch node connection
  14. LX: Inductor connection
  15. PGND: Power ground
  16. PGND: Power ground
  17. PGND: Power ground
  18. PGND: Power ground
  19. PGND: Power ground
  20. PGND: Power ground
  21. PGND: Power ground
  22. PGND: Power ground
  23. PGND: Power ground
  24. PGND: Power ground
  25. PGND: Power ground
  26. PGND: Power ground
  27. PGND: Power ground
  28. PGND: Power ground

Functional Features

  • Wide input voltage range allows for versatile applications.
  • High-efficiency operation minimizes power losses.
  • Dimming control options provide flexibility in lighting design.
  • Fault protection features ensure reliable operation and protect the LEDs.

Advantages and Disadvantages

Advantages: - High efficiency leads to energy savings. - Wide input voltage range enables compatibility with various power sources. - Dimming control allows for adjustable brightness. - Fault protection features enhance reliability.

Disadvantages: - Limited maximum output current may not be suitable for high-power LED applications. - Complex pin configuration may require careful PCB layout.

Working Principles

The LT3952IFE#PBF operates as a constant current LED driver. It utilizes a boost converter topology to efficiently regulate the LED current. The input voltage is boosted to a higher level, which is then controlled to provide a constant current output to the LEDs. The dimming control input allows for adjusting the LED brightness, while the fault protection features safeguard against overvoltage, overcurrent, and overtemperature conditions.

Detailed Application Field Plans

The LT3952IFE#PBF is commonly used in various lighting applications, including: - Automotive lighting - Industrial lighting - Architectural lighting - Signage lighting - Backlighting

Detailed and Complete Alternative Models

Some alternative models that can be considered as alternatives to the LT3952IFE#PBF are: - LT3952IFE#TRPBF - LT3952HFE#PBF - LT3952HFE#TRPBF - LT3952MPFE#PBF - LT3952MPFE#TRPBF

These alternative models offer similar functionality and characteristics, providing options for different design requirements.

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10 domande e risposte comuni relative all'applicazione di LT3952IFE#PBF nelle soluzioni tecniche

Sure! Here are 10 common questions and answers related to the application of LT3952IFE#PBF in technical solutions:

  1. Q: What is the LT3952IFE#PBF? A: The LT3952IFE#PBF is a high voltage, current mode boost, flyback, SEPIC, and inverting DC/DC controller.

  2. Q: What is the input voltage range of the LT3952IFE#PBF? A: The input voltage range of the LT3952IFE#PBF is from 4.5V to 40V.

  3. Q: What is the maximum output voltage that can be achieved with the LT3952IFE#PBF? A: The LT3952IFE#PBF can achieve a maximum output voltage of up to 60V.

  4. Q: Can the LT3952IFE#PBF be used for both step-up and step-down applications? A: Yes, the LT3952IFE#PBF can be used for step-up (boost), step-down (buck), and other topologies like flyback and SEPIC.

  5. Q: What is the maximum switching frequency of the LT3952IFE#PBF? A: The LT3952IFE#PBF has a maximum switching frequency of 1MHz.

  6. Q: Is the LT3952IFE#PBF suitable for automotive applications? A: Yes, the LT3952IFE#PBF is suitable for automotive applications as it operates over a wide temperature range (-40°C to 125°C) and meets automotive specifications.

  7. Q: Does the LT3952IFE#PBF have built-in protection features? A: Yes, the LT3952IFE#PBF includes various protection features such as overvoltage protection, overcurrent protection, and thermal shutdown.

  8. Q: Can the LT3952IFE#PBF be used in battery charging applications? A: Yes, the LT3952IFE#PBF can be used in battery charging applications as it supports constant current (CC) and constant voltage (CV) modes.

  9. Q: What is the typical efficiency of the LT3952IFE#PBF? A: The typical efficiency of the LT3952IFE#PBF is around 90% depending on the application and operating conditions.

  10. Q: Are there any evaluation boards or reference designs available for the LT3952IFE#PBF? A: Yes, Linear Technology (now part of Analog Devices) provides evaluation boards and reference designs for the LT3952IFE#PBF to help users get started with their applications.

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