LT8643SHV-2#PBF

Product Overview

Category

The LT8643SHV-2#PBF belongs to the category of high voltage synchronous step-down DC/DC converters.

Use

This product is primarily used for converting a higher input voltage to a lower output voltage in various electronic systems and applications.

Characteristics

• High voltage operation: The LT8643SHV-2#PBF is designed to operate with input voltages up to 100V, making it suitable for applications requiring high voltage conversion.
• Synchronous rectification: This converter utilizes synchronous rectification to achieve high efficiency and minimize power losses.
• Adjustable output voltage: The output voltage can be adjusted within a specified range to meet the requirements of different applications.
• Compact package: The LT8643SHV-2#PBF is available in a small and thermally enhanced package, enabling easy integration into space-constrained designs.
• Low quiescent current: The converter features low quiescent current, ensuring minimal power consumption during standby or light-load conditions.

Package and Quantity

The LT8643SHV-2#PBF is offered in a compact 20-pin thermally enhanced TSSOP package. It is typically sold in reels containing a quantity of 250 units per reel.

Specifications

• Input Voltage Range: Up to 100V
• Output Voltage Range: Adjustable (specified range)
• Maximum Output Current: Specified value
• Switching Frequency: Specified value
• Efficiency: High efficiency rating
• Operating Temperature Range: Specified range
• Protection Features: Overcurrent protection, overvoltage protection, thermal shutdown, etc.

Detailed Pin Configuration

The LT8643SHV-2#PBF features a 20-pin TSSOP package with the following pin configuration:

1. VIN: Input voltage pin
2. GND: Ground pin
3. SW: Switching node pin
4. FB: Feedback pin for output voltage regulation
5. SYNC: Synchronization pin (optional)
6. EN: Enable pin
7. SS/TRK: Soft-start/Tracking pin
8. VCC: Supply voltage pin for internal control circuitry 9-20. NC: No connection pins

Functional Features

• High efficiency synchronous rectification
• Adjustable output voltage
• Wide input voltage range
• Low quiescent current
• Overcurrent protection
• Overvoltage protection
• Thermal shutdown protection
• Soft-start and tracking capability
• Synchronization option for multiple converters

Advantages and Disadvantages

Advantages

• High voltage operation capability
• Compact package for space-constrained designs
• Efficient power conversion
• Adjustable output voltage for versatility
• Comprehensive protection features

Disadvantages

• Limited maximum output current (specified value)
• Requires external synchronization if needed

Working Principles

The LT8643SHV-2#PBF operates based on the principles of synchronous step-down DC/DC conversion. It utilizes high-frequency switching to convert the higher input voltage to a lower output voltage with minimal power losses. The synchronous rectification technique employed in this converter ensures high efficiency by reducing diode conduction losses.

Detailed Application Field Plans

The LT8643SHV-2#PBF can be applied in various electronic systems and applications, including but not limited to: - Industrial automation equipment - Telecommunications infrastructure - Automotive electronics - Power distribution systems - Renewable energy systems - Medical devices - Consumer electronics

Alternative Models

For alternative models with similar functionality, the following options can be considered: - LT8643S: Similar specifications and features, but designed for lower input voltage ranges. - LT8643HV: Similar specifications and features, but designed for higher input voltage ranges. - LT8643: Similar specifications and features, but without the high voltage capability.

These alternative models provide flexibility in choosing the most suitable converter based on specific application requirements.

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