LT8708HUHG-1#PBF

Product Overview

Category

The LT8708HUHG-1#PBF belongs to the category of high-efficiency, synchronous buck-boost DC/DC converters.

Use

This product is primarily used for power management applications where a wide input voltage range and high efficiency are required.

Characteristics

• High Efficiency: The LT8708HUHG-1#PBF offers high efficiency over a wide input voltage range, making it suitable for various power management applications.
• Synchronous Buck-Boost Conversion: It provides seamless transition between step-up (boost) and step-down (buck) modes, allowing for flexible voltage regulation.
• Wide Input Voltage Range: The converter can operate from an input voltage as low as 2.8V up to 80V, enabling it to handle a wide range of power sources.
• Adjustable Output Voltage and Current Limit: The output voltage and current limit can be easily adjusted using external resistors, providing flexibility in power management.
• Package: The LT8708HUHG-1#PBF comes in a compact and thermally enhanced 5mm × 6mm QFN-40 package, ensuring efficient heat dissipation.

Packaging/Quantity

The LT8708HUHG-1#PBF is available in tape and reel packaging, with a quantity of 250 units per reel.

Specifications

• Input Voltage Range: 2.8V to 80V
• Output Voltage Range: 0.8V to 80V
• Maximum Output Current: 10A
• Switching Frequency: Up to 750kHz
• Operating Temperature Range: -40°C to 125°C

Detailed Pin Configuration

The LT8708HUHG-1#PBF has a total of 40 pins. Here is a detailed pin configuration:

1. VIN: Input Voltage
2. GND: Ground
3. SW: Switch Node
4. FB: Feedback Pin
5. VOUT: Output Voltage
6. SYNC/SS: Synchronization or Soft-Start Pin
7. RT: Timing Resistor
8. SS/TRK: Soft-Start/Tracking Pin
9. MODE: Mode Selection Pin
10. PGND: Power Ground

(Continued for the remaining pins...)

Functional Features

• Seamless Buck-Boost Conversion: The LT8708HUHG-1#PBF seamlessly transitions between buck and boost modes, providing efficient voltage regulation across a wide input voltage range.
• High Efficiency: With its synchronous rectification and low quiescent current, this converter achieves high efficiency, minimizing power losses.
• Adjustable Output Voltage and Current Limit: The output voltage and current limit can be easily adjusted to meet specific application requirements.
• Protection Features: The LT8708HUHG-1#PBF incorporates various protection features such as overvoltage protection, overcurrent protection, and thermal shutdown, ensuring safe operation.

Advantages and Disadvantages

Advantages

• Wide input voltage range allows for versatile power source compatibility.
• High efficiency results in reduced power consumption and heat generation.
• Compact package with enhanced thermal properties ensures efficient heat dissipation.
• Adjustable output voltage and current limit provide flexibility in power management.

Disadvantages

• Limited maximum output current of 10A may not be suitable for high-power applications.
• Higher cost compared to conventional buck or boost converters.

Working Principles

The LT8708HUHG-1#PBF operates based on a synchronous buck-boost topology. It utilizes high-frequency switching to regulate the output voltage efficiently. By adjusting the duty cycle of the internal switches, it seamlessly transitions between buck and boost modes, maintaining a stable output voltage regardless of the input voltage.

Detailed Application Field Plans

The LT8708HUHG-1#PBF finds applications in various fields, including but not limited to: - Automotive: Electric vehicles, hybrid electric vehicles, and automotive power systems. - Industrial: Industrial automation, robotics, and motor control systems. - Renewable Energy: Solar power systems, wind power systems, and energy storage systems. - Telecommunications: Base stations, network equipment, and communication systems. - Consumer Electronics: Portable devices, battery-powered systems, and IoT devices.

Detailed and Complete Alternative Models

• LT8708H: Similar to LT8708HUHG-1#PBF, but with a different package (QFN-38).
• LT8708I: A pin-compatible alternative with an extended temperature range (-40°C to 150°C).
• LT8708S: Offers additional features such as adjustable frequency and phase modulation.

These alternative models provide similar functionality and can be considered based on specific application requirements.

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