Linear Technology/Analog Devices
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LT3752IFE

LT3752IFE

Product Overview

  • Category: Integrated Circuit (IC)
  • Use: Power Management
  • Characteristics: High Voltage, High Efficiency, Wide Input Voltage Range
  • Package: 28-Lead TSSOP
  • Essence: The LT3752IFE is a high voltage, high efficiency synchronous step-down DC/DC controller designed for driving an external N-channel power MOSFET. It operates over a wide input voltage range and provides a regulated output voltage.
  • Packaging/Quantity: Available in tubes or reels, with a minimum order quantity of 250 units.

Specifications

  • Input Voltage Range: 4V to 60V
  • Output Voltage Range: 0.8V to 55V
  • Switching Frequency: Up to 500kHz
  • Maximum Duty Cycle: 90%
  • Operating Temperature Range: -40°C to 125°C

Pin Configuration

The LT3752IFE has a 28-lead TSSOP package with the following pin configuration:

  1. VIN: Input Voltage
  2. VCC: Controller Supply Voltage
  3. FB: Feedback Voltage
  4. COMP: Compensation Node
  5. SS: Soft-Start
  6. SYNC/MODE: Synchronization/MODE Selection
  7. GATE: Gate Drive Output
  8. PGND: Power Ground
  9. AGND: Analog Ground
  10. BST: Bootstrap Capacitor Connection
  11. SW: Switch Node
  12. SW: Switch Node
  13. SW: Switch Node
  14. SW: Switch Node
  15. SW: Switch Node
  16. SW: Switch Node
  17. SW: Switch Node
  18. SW: Switch Node
  19. SW: Switch Node
  20. SW: Switch Node
  21. SW: Switch Node
  22. SW: Switch Node
  23. SW: Switch Node
  24. SW: Switch Node
  25. SW: Switch Node
  26. SW: Switch Node
  27. SW: Switch Node
  28. SW: Switch Node

Functional Features

  • Wide input voltage range allows for versatile applications.
  • High efficiency operation minimizes power loss.
  • Synchronous rectification improves overall efficiency.
  • Adjustable output voltage provides flexibility.
  • Soft-start feature prevents excessive inrush current.

Advantages and Disadvantages

Advantages: - Wide input voltage range enables use in various systems. - High efficiency operation reduces power consumption. - Synchronous rectification improves overall efficiency. - Adjustable output voltage offers versatility. - Soft-start feature protects components from excessive stress.

Disadvantages: - Limited maximum duty cycle may restrict certain applications. - Requires an external N-channel power MOSFET for operation.

Working Principles

The LT3752IFE is a synchronous step-down DC/DC controller that regulates the output voltage by controlling the duty cycle of an external N-channel power MOSFET. It uses a feedback loop to monitor the output voltage and adjust the duty cycle accordingly. The controller operates at a high switching frequency, allowing for efficient power conversion. The synchronous rectification further enhances efficiency by reducing power losses during switching transitions.

Detailed Application Field Plans

The LT3752IFE is suitable for a wide range of applications, including but not limited to:

  1. Industrial Power Supplies
  2. Automotive Electronics
  3. Telecommunications Equipment
  4. Battery-Powered Systems
  5. LED Lighting
  6. Distributed Power Systems
  7. Solar Power Systems

Alternative Models

Here are some alternative models that offer similar functionality to the LT3752IFE:

  1. LT3750IFE
  2. LT3751IFE
  3. LT3753IFE
  4. LT3754IFE
  5. LT3755IFE

These models can be considered as alternatives based on specific requirements and application needs.

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Enumere 10 preguntas y respuestas comunes relacionadas con la aplicación de LT3752IFE en soluciones técnicas

Sure! Here are 10 common questions and answers related to the application of LT3752IFE in technical solutions:

  1. Q: What is the LT3752IFE? A: The LT3752IFE is a high voltage, high current flyback controller designed for use in isolated power supply applications.

  2. Q: What is the maximum input voltage supported by the LT3752IFE? A: The LT3752IFE can handle input voltages up to 100V.

  3. Q: What is the maximum output power that can be achieved with the LT3752IFE? A: The LT3752IFE can deliver up to 100W of output power.

  4. Q: Can the LT3752IFE operate in continuous or discontinuous mode? A: Yes, the LT3752IFE can operate in both continuous and discontinuous modes, depending on the design requirements.

  5. Q: Does the LT3752IFE have built-in protection features? A: Yes, the LT3752IFE includes various protection features such as overvoltage protection, overcurrent protection, and thermal shutdown.

  6. Q: What type of feedback control does the LT3752IFE support? A: The LT3752IFE supports primary-side feedback control, eliminating the need for an opto-isolator.

  7. Q: Can the LT3752IFE be used in automotive applications? A: Yes, the LT3752IFE is suitable for automotive applications and meets the necessary automotive standards.

  8. Q: What is the typical switching frequency of the LT3752IFE? A: The LT3752IFE operates at a fixed frequency of 200kHz.

  9. Q: Can the LT3752IFE drive multiple outputs simultaneously? A: Yes, the LT3752IFE can drive multiple outputs, making it suitable for applications requiring multiple isolated supplies.

  10. Q: What are the key advantages of using the LT3752IFE in power supply designs? A: The LT3752IFE offers high efficiency, compact size, and simplified design due to its primary-side feedback control and integrated protection features.

Please note that these answers are general and may vary depending on specific design considerations and requirements.