LT3825EFE

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LT3825EFE

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Switching Voltage Regulators LT3825 - Isolated No-Opto Synchronous Flyback Controller with Wide Input Supply Range

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仕様

属性

概要

Description

The LT3825EFE is a high-performance PWM controller designed for isolated and non-isolated DC/DC converter applications. Manufactured by Analog Devices, it is known for its efficiency and versatility in power supply designs. The LT3825EFE operates over a wide input voltage range and supports both forward and flyback converter topologies, making it suitable for various power conversion needs.
Key features include programmable switching frequency, current-mode control, and robust overcurrent protection. It also offers a start-up feature from high-impedance source VIN, which is useful in energy-efficient systems. The device is housed in a thermally enhanced 16-lead TSSOP package, optimizing it for space-limited and heat-sensitive applications.
The LT3825EFE's integrated slope compensation and feedback loop simplify design and improve system stability. It is well-suited for industrial, telecommunications, and automotive applications where reliability and compact form factor are essential. Overall, the LT3825EFE provides a flexible and efficient solution for demanding power management tasks.

Features

The LT3825EFE is a high-performance, synchronous step-down switching regulator controller designed by Analog Devices. It features a wide input voltage range, typically from 4V to 60V, which makes it suitable for a variety of applications, including automotive, industrial, and telecommunications systems. The device supports output voltages as low as 0.8V, providing flexibility in design for different applications.
Key features include high efficiency due to its synchronous rectification capability, which minimizes power loss during operation. It offers a constant-frequency, current-mode control architecture, which ensures excellent transient response and easy loop compensation. The LT3825EFE also includes an adjustable switching frequency from 100kHz to 500kHz, allowing designers to optimize the trade-off between efficiency and component size.
Additional features include programmable soft-start, which helps manage inrush current during start-up, as well as a power good output for system monitoring. The device also incorporates protection features like overvoltage and overcurrent protection, enhancing reliability in demanding environments. Overall, the LT3825EFE is highly versatile, providing efficient and reliable performance for various power management applications.

Pinout

The LT3825EFE is a high-performance, high-voltage DC/DC controller designed by Analog Devices for use in a variety of power supply applications. It typically comes in a 16-pin TSSOP (Thin Shrink Small Outline Package) with the following pin functions:
1. VIN: Input supply voltage.
2. UVLO: Undervoltage lockout threshold setting.
3. SS (Soft-Start): Soft-start control for limiting inrush current.
4. ILIM (Current Limit): Sets the current limit threshold.
5. FB (Feedback): Receives feedback voltage from the output.
6. COMP: Compensation for the error amplifier.
7. GND: Ground reference.
8. DRIVE: Drives the gate of the external MOSFET.
9. SENSE: Senses current through an external sense resistor.
10. SYNC: Synchronizes the switching frequency to an external clock.
11. RT (Timing Resistor): Sets the switching frequency.
12. VCC: Supply voltage for internal circuits.
13. PGOOD (Power Good): Indicates when the output is within regulation.
14. RUN/SS: Controls the run and soft-start functions.
15. BG (Boost Ground): Ground for the gate drive.
16. BOOST: Bootstrap capacitor connection for driving the high-side MOSFET gate.
These pins collectively support the controller’s functions such as voltage regulation, synchronization, protection, and control.

Manufacturer

The LT3825EFE is manufactured by Analog Devices, Inc. Analog Devices is a multinational semiconductor company that designs and manufactures integrated circuits used in electronic equipment. The company is well-known for its analog, mixed-signal, and digital signal processing (DSP) integrated circuits, which are utilized in a variety of applications including industrial, automotive, communication, healthcare, and consumer electronics. With a focus on innovative solutions, Analog Devices plays a significant role in the technology sector, enabling advancements in sensing, measuring, powering, connecting, and interpreting complex data.

Application

The LT3825EFE is a high-performance DC/DC controller IC primarily used in isolated power supply applications. It is well-suited for flyback, forward, and SEPIC converter designs. Typical application areas include telecommunications, industrial power systems, distributed power architectures, and automotive power supplies. It offers features like a wide input voltage range, high efficiency, and programmable soft-start, making it ideal for scenarios requiring reliable and efficient power conversion. Additionally, its ability to operate in both continuous and discontinuous conduction modes enhances its flexibility for various power design requirements.

Package

The LT3825EFE is typically available in a thermally enhanced 16-lead TSSOP (Thermal Small Outline Package with Exposed Pad) package. This package type is designed to provide improved heat dissipation, which is crucial for maintaining performance and reliability in power management applications.