Linear Technology/QD Devices
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LT3753EFE

LT3753EFE

Product Overview

Category: Integrated Circuit (IC)

Use: The LT3753EFE is a high voltage, synchronous, current mode controller designed for driving N-channel power MOSFETs in boost, SEPIC, and flyback applications. It provides a compact and efficient solution for various power conversion needs.

Characteristics: - High voltage operation - Synchronous rectification - Current mode control - Wide input voltage range - Adjustable switching frequency - Programmable soft-start - Fault protection features

Package: The LT3753EFE is available in a 28-lead TSSOP package, which offers good thermal performance and ease of integration into circuit designs.

Essence: The LT3753EFE is an essential component in power conversion circuits, enabling efficient and reliable voltage boosting, voltage regulation, and power delivery.

Packaging/Quantity: The LT3753EFE is typically sold in reels or tubes, with a quantity of 250 units per reel/tube.

Specifications

  • Input Voltage Range: 4V to 100V
  • Output Voltage Range: Up to 200V
  • Switching Frequency Range: 100kHz to 500kHz
  • Maximum Duty Cycle: 90%
  • Operating Temperature Range: -40°C to 125°C
  • Package Type: 28-Lead TSSOP

Detailed Pin Configuration

The LT3753EFE has the following pin configuration:

  1. VCC: Power supply voltage input
  2. GND: Ground reference
  3. FB: Feedback pin for voltage regulation
  4. COMP: Compensation pin for loop stability
  5. SS: Soft-start pin for controlling startup behavior
  6. RT/CLK: External resistor/capacitor connection for setting switching frequency
  7. SYNC/MODE: External synchronization or mode selection pin
  8. VCCSENSE: Voltage sense input for VCC regulation
  9. VCCREF: Reference voltage output for VCC regulation
  10. BST: High-side gate drive boost voltage input
  11. SW: Switch node connection to power MOSFET
  12. PGND: Power ground reference
  13. AGND: Analog ground reference
  14. SS/TRK: Soft-start tracking pin for multiple IC synchronization
  15. RT/CLK2: External resistor/capacitor connection for setting switching frequency (second channel)
  16. SYNC/MODE2: External synchronization or mode selection pin (second channel)
  17. VCCSENSE2: Voltage sense input for VCC regulation (second channel)
  18. VCCREF2: Reference voltage output for VCC regulation (second channel)
  19. BST2: High-side gate drive boost voltage input (second channel)
  20. SW2: Switch node connection to power MOSFET (second channel)
  21. PGND2: Power ground reference (second channel)
  22. AGND2: Analog ground reference (second channel)
  23. FB2: Feedback pin for voltage regulation (second channel)
  24. COMP2: Compensation pin for loop stability (second channel)
  25. SS2: Soft-start pin for controlling startup behavior (second channel)
  26. GATE2: Gate drive output for synchronous rectification (second channel)
  27. GATE: Gate drive output for synchronous rectification
  28. VCC2: Power supply voltage input (second channel)

Functional Features

  1. High Voltage Operation: The LT3753EFE can handle input voltages ranging from 4V to 100V, making it suitable for a wide range of applications.
  2. Synchronous Rectification: The controller supports synchronous rectification, improving overall efficiency and reducing power losses.
  3. Current Mode Control: The current mode control architecture ensures stable and precise regulation of the output voltage.
  4. Wide Input Voltage Range: The LT3753EFE can operate with input voltages as low as 4V, allowing it to handle various power sources.
  5. Adjustable Switching Frequency: The switching frequency can be adjusted externally using resistors and capacitors, providing flexibility in design.
  6. Programmable Soft-Start: The soft-start feature allows for controlled startup behavior, reducing inrush currents and protecting components.
  7. Fault Protection Features: The controller incorporates various fault protection mechanisms such as overvoltage protection, undervoltage lockout, and thermal shutdown.

Advantages and Disadvantages

Advantages: - High voltage operation enables versatile applications - Synchronous rectification improves efficiency - Current mode control ensures stable voltage regulation - Wide input voltage range accommodates different power sources - Adjustable switching frequency offers design flexibility - Programmable soft-start protects components during startup - Fault protection features enhance system reliability

Disadvantages: - Limited to boost, SEPIC, and flyback applications

Enumere 10 preguntas y respuestas comunes relacionadas con la aplicación de LT3753EFE en soluciones técnicas

Sure! Here are 10 common questions and answers related to the application of LT3753EFE in technical solutions:

  1. Q: What is the LT3753EFE? A: The LT3753EFE is a high voltage, synchronous, current mode controller designed for driving N-channel power MOSFETs in isolated flyback and forward converter topologies.

  2. Q: What is the input voltage range supported by the LT3753EFE? A: The LT3753EFE supports an input voltage range from 6V to 100V.

  3. Q: Can the LT3753EFE be used in both flyback and forward converter topologies? A: Yes, the LT3753EFE is designed to be used in both flyback and forward converter topologies.

  4. Q: What is the maximum switching frequency supported by the LT3753EFE? A: The LT3753EFE can support a maximum switching frequency of up to 500kHz.

  5. Q: Does the LT3753EFE have built-in protection features? A: Yes, the LT3753EFE includes various protection features such as overvoltage protection, undervoltage lockout, and thermal shutdown.

  6. Q: Can the LT3753EFE drive multiple MOSFETs in parallel? A: Yes, the LT3753EFE can drive multiple MOSFETs in parallel to handle higher power levels.

  7. Q: What is the typical efficiency of the LT3753EFE? A: The efficiency of the LT3753EFE depends on the specific application and operating conditions but can typically reach high levels, exceeding 90%.

  8. Q: Is the LT3753EFE suitable for automotive applications? A: Yes, the LT3753EFE is suitable for automotive applications as it can operate over a wide temperature range and has automotive-grade reliability.

  9. Q: Can the LT3753EFE be used in high-power applications? A: Yes, the LT3753EFE can be used in high-power applications as it supports high input voltages and can drive multiple MOSFETs in parallel.

  10. Q: Are there any evaluation boards or reference designs available for the LT3753EFE? A: Yes, Linear Technology (now part of Analog Devices) provides evaluation boards and reference designs for the LT3753EFE to help users get started with their designs quickly and efficiently.

Please note that these answers are general and may vary depending on the specific application and design considerations. It's always recommended to refer to the LT3753EFE datasheet and consult with technical experts for detailed information and guidance.