LM25037MT

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LM25037MT

+BOM

SWITCHING CONTROLLER, VOLTAGE-MO

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Specifications

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Overview

Description

The LM25037MT is a highly integrated PWM (Pulse Width Modulation) controller designed for use in DC-DC converters, specifically flyback and forward converter topologies. Manufactured by Texas Instruments, it is part of the LM25037 family and comes in a thermally enhanced TSSOP (Thin Shrink Small Outline Package) package. The device operates over a wide input voltage range, making it suitable for various industrial and telecommunications applications.
Key features of the LM25037MT include programmable switching frequency, current mode control for superior performance, and cycle-by-cycle current limiting. It also offers a high-voltage start-up regulator, which simplifies designs by reducing the need for additional components. The controller is equipped with a variety of protection features, such as overvoltage protection (OVP), undervoltage lockout (UVLO), and thermal shutdown, ensuring reliable operation under fault conditions.
The LM25037MT is valued for its efficiency, flexibility, and robust performance, making it a popular choice for power supply designers seeking to implement efficient energy conversion solutions.

Equivalent

The LM25037MT is a half-bridge PWM controller. Equivalent products might include the LT3798, UCC25600, or the UC3825 from manufacturers like Texas Instruments, Analog Devices, or ON Semiconductor. These alternatives offer similar functionalities for controlling half-bridge or full-bridge converters. However, when selecting equivalents, it's important to review the specific electrical characteristics and application requirements to ensure compatibility.

Features

The LM25037MT is a versatile PWM controller designed for high-efficiency and high-performance power supply applications. Key features include:
1. Wide Input Voltage Range: Supports a broad input voltage range, making it suitable for various applications.
2. High-Frequency Operation: Capable of operating at high frequencies, which allows for smaller external components and a more compact design.
3. Current-Mode Control: Utilizes peak current-mode control to provide fast transient response and ease of loop compensation.
4. Flexible Topology: Supports both single-ended and double-ended topologies, including push-pull, half-bridge, and full-bridge configurations.
5. Integrated Start-Up Regulator: Includes an integrated high-voltage start-up regulator to simplify design.
6. Programmable Features: Offers programmable soft-start to limit inrush current and programmable slope compensation for improved stability.
7. Fault Protection: Features comprehensive fault protection, including overvoltage, overcurrent, and thermal shutdown.
8. Synchronization: Allows for synchronization with an external clock to reduce interference and improve performance in multi-controller systems.
These features make the LM25037MT an ideal choice for designing efficient and robust power management systems.

Pinout

The LM25037MT is a high-voltage PWM controller designed for isolated and non-isolated flyback and forward converters. It comes in a 16-pin TSSOP package. Here's a brief overview of its pin functions:
1. VCC: Supply voltage input.
2. OUTA: Output driver A.
3. OUTB: Output driver B.
4. GND: Ground reference.
5. RES: Restart/reset timer pin.
6. CS: Current sense input.
7. RT: Oscillator timing resistor and frequency setting.
8. SYNC: Synchronization input.
9. RAMP: Provides slope compensation.
10. COMP: Error amplifier output.
11. FB: Feedback input.
12. SS: Soft-start control.
13. UVLO: Undervoltage lockout input.
14. REF: Reference voltage output.
15. VCLAMP: Input voltage clamp.
16. NC: No connection or reserved for future use.
This configuration supports a variety of functions like soft-start, current limiting, and frequency synchronization, making the LM25037MT versatile for power supply applications.

Manufacturer

The LM25037MT is a product manufactured by Texas Instruments. Texas Instruments, often abbreviated as TI, is a global semiconductor company that designs and produces a wide range of electronic components, including integrated circuits for analog and digital embedded processing applications. The company is headquartered in Dallas, Texas, and is known for its innovations in the field of electronics, particularly in the areas of analog chips and embedded processors. TI serves various industries, including automotive, industrial, personal electronics, communications equipment, and enterprise systems.

Application

The LM25037MT is a voltage mode PWM controller primarily used in isolated DC-DC converters and offline power supply applications. Its key application areas include:
1. Telecommunications Equipment: Provides stable power supply for telecom systems.
2. Industrial Power Supplies: Offers efficient power management in industrial automation and control systems.
3. DC-DC Converters: Used in designing isolated converters in power distribution.
4. AC-DC Power Supplies: Facilitates the creation of efficient and reliable AC-DC power supply units.
5. Battery Chargers: Can be used in battery charging systems for controlled power delivery.
These applications benefit from its high efficiency, wide input voltage range, and robust fault protection features.

Package

The LM25037MT is packaged in a TSSOP (Thin Shrink Small Outline Package) with 16 pins. This type of package is compact and designed for surface mounting on a printed circuit board.

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