LM5025AMTCX

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LM5025AMTCX

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Switching Controllers

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  • メーカー品番 #LM5025AMTCX

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仕様

属性

概要

Description

The LM5025AMTCX is a pulse-width modulation (PWM) controller designed primarily for use in switch-mode power supplies. It targets applications requiring high efficiency and reliability, such as in telecommunications, computer systems, and industrial equipment. This integrated circuit is part of Texas Instruments' LM5025 series and is tailored for push-pull or half-bridge topologies.
Key features include programmable soft-start, under-voltage lockout (UVLO), cycle-by-cycle current limiting, and thermal shutdown for enhanced system protection. The LM5025AMTCX supports both voltage mode and current mode control, allowing flexibility in design. It operates over a wide input voltage range and can drive large external MOSFETs due to its robust drivers.
The chip's operating frequency is adjustable, thanks to its oscillator circuit, providing designers with the ability to optimize performance based on specific requirements. Its compact package and high level of integration help reduce board space and component count, contributing to a more streamlined, cost-effective power supply design.

Equivalent

The LM5025AMTCX is a current mode PWM controller for push-pull converters. Equivalent products include the UC3825, which is another PWM controller, and the UCC2809, also used for similar applications. Additionally, you might consider the Texas Instruments LM5035, which offers similar functionality with integrated features for push-pull configurations. Always verify pin compatibility and specific application requirements when selecting an equivalent.

Features

The LM5025AMTCX is a versatile PWM controller designed for high-frequency, current-mode control in isolated DC-DC converters. Key features include:
1. Wide Input Voltage Range: Capable of operating over a broad input voltage range, making it suitable for various applications.
2. Current-Mode Control: Provides excellent transient response and easy loop compensation.
3. Programmable Switching Frequency: Allows flexibility in application design by setting the desired frequency.
4. Soft-Start Capability: Ensures controlled startup by gradually increasing the output voltage.
5. Integrated High-Voltage Start-Up Regulator: Simplifies the design and reduces external components.
6. Adjustable Slope Compensation: Enhances system stability, especially in high-frequency applications.
7. Synchronization Capability: Allows the controller to sync with an external clock, facilitating multiple controller operation.
8. Cycle-by-Cycle Current Limiting: Protects against overcurrent conditions.
9. Fault Protection Features: Includes thermal shutdown and output over-voltage protection.
10. Package: Available in a thermally enhanced TSSOP package.
These features make the LM5025AMTCX an effective solution for designing efficient and reliable power supply systems.

Pinout

The LM5025AMTCX is a PWM controller IC used primarily for power supply applications. It typically comes in a TSSOP package with 16 pins. The functions of these pins are:
1. VCC: Power supply input.
2. OUT_A: Output for driving the A side of the power switch.
3. OUT_B: Output for driving the B side of the power switch.
4. CS: Current sense input.
5. RT: Sets the oscillator frequency.
6. SYNC: Synchronization input/output for frequency synchronization.
7. COMP: Compensation network connection.
8. FB: Feedback input for regulating output voltage.
9. RES: Restart timer connection.
10. SS: Soft start pin.
11. UVLO: Undervoltage lockout pin.
12. GND: Ground connection.
13. VIN: Input voltage supply.
14. REF: Reference voltage output.
15. DLY: Delay pin for setting dead-time.
16. NC/Res: No connection or reserved.
These pins allow the LM5025AMTCX to control switch-mode power supplies effectively, providing flexibility for a range of applications.

Manufacturer

The LM5025AMTCX is manufactured by Texas Instruments. Texas Instruments is a technology company that designs and manufactures semiconductors and various integrated circuits, which are used in electronic devices across a wide range of industries. The company is well-known for its innovations in analog and embedded processing products.

Application

The LM5025AMTCX is a high-performance PWM controller commonly used in applications such as isolated DC-DC converters, power supplies for telecommunications, and industrial systems. It is suitable for both forward and flyback converter topologies. The device's features, such as programmable soft-start, cycle-by-cycle current limiting, and frequency synchronization, make it ideal for power management in these areas. Additionally, its high efficiency and reliability make it a good fit for battery-powered and energy-sensitive applications.

Package

The LM5025AMTCX is typically available in a Thin Shrink Small Outline Package (TSSOP) with 16 pins. This package type is compact and suitable for surface mounting on PCBs, commonly used in power management applications.

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