LT3791MPFE-1#PBF

Product Overview

Category

The LT3791MPFE-1#PBF belongs to the category of integrated circuits (ICs) specifically designed for power management applications.

Use

This IC is commonly used in various power supply systems, including but not limited to LED lighting, automotive electronics, industrial equipment, and telecommunications.

Characteristics

• High efficiency: The LT3791MPFE-1#PBF offers excellent power conversion efficiency, ensuring minimal energy loss during operation.
• Wide input voltage range: It can handle a wide range of input voltages, making it suitable for diverse applications.
• Versatile output configurations: The IC supports multiple output configurations, enabling flexibility in designing power supply systems.
• Advanced protection features: It incorporates various protection mechanisms such as overvoltage protection, overcurrent protection, and thermal shutdown, ensuring safe and reliable operation.
• Compact package: The LT3791MPFE-1#PBF is available in a small form factor package, allowing for space-efficient integration into electronic devices.

Package and Quantity

The LT3791MPFE-1#PBF is typically packaged in a 28-pin plastic TSSOP (Thin Shrink Small Outline Package). It is commonly sold in reels containing a specified quantity of ICs, usually around 2500 units per reel.

Specifications

• Input Voltage Range: 4.5V to 60V
• Output Voltage Range: 0.8V to 55V
• Maximum Switching Frequency: 1MHz
• Maximum Output Current: 10A
• Operating Temperature Range: -40°C to 125°C

Pin Configuration

The LT3791MPFE-1#PBF features a 28-pin TSSOP package with the following pin configuration:

1. VIN
2. SW
3. GND
4. FB
5. VCC
6. SYNC
7. SS/TR/UVLO
8. RT
9. COMP
10. ITH
11. AGND
12. PGND
13. VOUT1
14. VOUT2
15. VOUT3
16. VOUT4
17. VOUT5
18. VOUT6
19. VOUT7
20. VOUT8
21. VOUT9
22. VOUT10
23. VOUT11
24. VOUT12
25. VOUT13
26. VOUT14
27. VOUT15
28. VOUT16

Functional Features

• Wide input voltage range allows for compatibility with various power sources.
• Multiple output configurations enable the IC to cater to different load requirements.
• Adaptive frequency control ensures optimal efficiency across a wide range of operating conditions.
• Soft-start and tracking features facilitate smooth startup and shutdown sequences.
• Integrated protection mechanisms safeguard against faults and abnormal operating conditions.

Advantages and Disadvantages

Advantages

• High efficiency leads to reduced power consumption and heat dissipation.
• Versatile output configurations offer flexibility in system design.
• Advanced protection features enhance system reliability and longevity.
• Compact package enables space-efficient integration into electronic devices.

Disadvantages

• Limited maximum output current may not be suitable for high-power applications.
• Higher cost compared to some alternative models.

Working Principles

The LT3791MPFE-1#PBF operates as a synchronous buck-boost DC-DC converter. It utilizes a combination of pulse width modulation (PWM) and frequency control techniques to regulate the output voltage. The IC employs an internal power switch to efficiently transfer energy from the input source to the output load. Various control and feedback mechanisms ensure stable and accurate voltage regulation.

Detailed Application Field Plans

The LT3791MPFE-1#PBF finds extensive application in the following fields:

1. LED Lighting: The IC is commonly used in LED driver circuits, providing efficient power conversion for lighting applications.
2. Automotive Electronics: It is utilized in automotive power supply systems, enabling reliable and regulated power delivery to various electronic components.
3. Industrial Equipment: The IC plays a crucial role in powering industrial machinery and equipment, ensuring stable operation and protection against voltage fluctuations.
4. Telecommunications: It is employed in telecommunications infrastructure, facilitating efficient power management for network equipment and communication devices.

Detailed and Complete Alternative Models

1. LT8391: This IC offers similar functionality to the LT3791MPFE-1#PBF but with a higher maximum output current of 15A.
2. LT3761: A comparable IC with a lower cost, suitable for applications with moderate power requirements.
3. LT8610: This alternative model provides a higher switching frequency and wider input voltage range, making it suitable for demanding power supply designs.

Please note that the above list is not exhaustive, and there are several other alternative models available in the market.