LT3756IMSE#TRPBF

Product Overview

Category: Integrated Circuit (IC)

Use: The LT3756IMSE#TRPBF is a high voltage, current mode DC/DC controller designed for driving an external N-channel power MOSFET. It is specifically designed to operate in boost, SEPIC, and flyback topologies.

Characteristics: - High voltage operation up to 100V - Wide input voltage range from 3V to 100V - Adjustable switching frequency up to 1MHz - Current mode control for excellent line and load regulation - Programmable soft-start function - Synchronizable to an external clock - Internal compensation network - Fault protection features including short-circuit protection, thermal shutdown, and undervoltage lockout

Package: MSOP-16E package

Essence: The LT3756IMSE#TRPBF is a versatile and efficient DC/DC controller that provides high voltage operation and a wide input voltage range. Its compact MSOP-16E package makes it suitable for space-constrained applications.

Packaging/Quantity: The LT3756IMSE#TRPBF is available in tape and reel packaging, with 2500 units per reel.

Specifications

• Input Voltage Range: 3V to 100V
• Output Voltage Range: Up to 100V
• Switching Frequency: Adjustable up to 1MHz
• Maximum Duty Cycle: 90%
• Operating Temperature Range: -40°C to 125°C
• Package Type: MSOP-16E

Pin Configuration

The LT3756IMSE#TRPBF has the following pin configuration:

1. VIN: Input voltage pin
2. GND: Ground pin
3. FB: Feedback pin for output voltage regulation
4. COMP: Compensation pin for loop stability
5. SS: Soft-start pin for controlling the startup time
6. SYNC/SS/TRK: Synchronization, soft-start, or tracking control pin
7. VCC: Supply voltage pin for internal circuitry
8. SW: Switch node connection to external MOSFET

Functional Features

• High voltage operation allows for direct connection to high voltage sources
• Current mode control provides excellent line and load regulation
• Programmable soft-start function enables controlled startup of the power supply
• Synchronizable to an external clock for system synchronization
• Internal compensation network simplifies design and improves stability
• Fault protection features ensure safe operation under abnormal conditions

Advantages and Disadvantages

Advantages: - Wide input voltage range allows for versatile applications - High voltage operation enables direct connection to high voltage sources - Compact MSOP-16E package saves board space - Excellent line and load regulation for stable output voltage - Programmable soft-start function for controlled startup

Disadvantages: - Limited maximum duty cycle of 90% - Requires an external N-channel power MOSFET for operation

Working Principles

The LT3756IMSE#TRPBF operates as a current mode DC/DC controller. It regulates the output voltage by adjusting the duty cycle of the external N-channel power MOSFET. The feedback pin (FB) monitors the output voltage and compares it to a reference voltage. Any deviation from the desired output voltage is corrected by adjusting the duty cycle.

The controller uses a current sense resistor in series with the power MOSFET to measure the inductor current. This information is fed back to the controller to regulate the output current. The LT3756IMSE#TRPBF also incorporates fault protection features such as short-circuit protection, thermal shutdown, and undervoltage lockout to ensure safe operation.

Detailed Application Field Plans

The LT3756IMSE#TRPBF is suitable for a wide range of applications, including but not limited to: - LED lighting systems - Automotive electronics - Industrial power supplies - Telecom infrastructure - Battery charging systems - Solar power systems

Its high voltage operation and wide input voltage range make it ideal for applications that require efficient power conversion in demanding environments.

Detailed and Complete Alternative Models

1. LT3756EMSE#TRPBF: Similar to LT3756IMSE#TRPBF, but with an extended operating temperature range (-40°C to 150°C).
2. LT3756HMSE#TRPBF: Higher voltage version with a maximum input voltage of 150V.
3. LT3756IMSE#PBF: Lead (Pb)-free version of LT3756IMSE#TRPBF.

These alternative models offer similar functionality and characteristics, providing flexibility for different application requirements.

In conclusion, the LT3756IMSE#TRPBF is a versatile and efficient DC/DC controller designed for high voltage applications. Its wide input voltage range