Texas Instruments

LM5109MA  

Gate Drivers ICs

LM5109MA Description

The LM5109MA is half a-bridge gate driver IC designed by Texas Instruments, a leading manufacturer in the power management (PMIC) category. This IC is housed in an 8SOIC package and is specifically tailored for surface-mount applications. The LM5109MA features independent channels, making it suitable for driving high-side and low-side MOSFETs in a variety of power conversion applications. Despite its obsolete status, the LM5109MA remains a robust solution for driving power MOSFETs with its peak output current capability of 1A for both sourcing and sinking. The device operates within a supply voltage range of 8V to 14V and supports a high-side voltage up to 118V with a bootstrap configuration. It is REACH unaffected and has a moisture sensitivity level (MSL) of 1, indicating it is suitable for unlimited storage conditions.

LM5109MA Features

• Independent Channel Type: Each channel operates independently, allowing for precise control over high-side and low-side MOSFETs.
• Wide Supply Voltage Range: The LM5109MA operates efficiently within an 8V to 14V supply voltage range, making it versatile for various power supply systems.
• High-Side Voltage Capability: With a maximum high-side voltage of 118V (bootstrap), the IC is well-suited for high-voltage applications.
• Logic Voltage Levels: The device supports logic voltage levels of 0.8V for VIL and 2.2V for VIH, ensuring compatibility with a wide range of control signals.
• Fast Rise and Fall Times: Typical rise and fall times of 15ns ensure rapid switching, minimizing switching losses and improving overall efficiency.
• Peak Output Current: The IC can source and sink up to 1A, providing robust drive capability for power MOSFETs.
• Surface Mount Compatibility: The LM5109MA is designed for surface-mount applications, facilitating compact and reliable PCB designs.
• Moisture Sensitivity Level 1: The MSL rating of 1 indicates that the device is suitable for unlimited storage conditions, reducing the risk of moisture-related issues.

LM5109MA Applications

The LM5109MA is ideal for a range of applications where efficient power conversion and reliable gate driving are critical. Specific use cases include:

• DC-DC Converters: The LM5109MA's ability to drive high-side and low-side MOSFETs makes it suitable for half-bridge configurations in DC-DC converters, ensuring efficient power transfer.
• Motor Drivers: In motor control applications, the IC's robust drive capability and fast switching times contribute to precise control and reduced power loss.
• Power Supplies: The device's wide supply voltage range and high-side voltage capability make it a reliable choice for various power supply designs, including those requiring high-voltage operation.
• Inverters: The LM5109MA's independent channels and fast switching characteristics are beneficial in inverter applications, where precise timing and efficient power conversion are essential.

Conclusion of LM5109MA

The LM5109MA from Texas Instruments is a versatile half-bridge gate driver IC designed for surface-mount applications. Despite its obsolete status, it continues to offer significant advantages in power conversion and gate driving applications. Its independent channel type, wide supply voltage range, and high-side voltage capability make it suitable for a variety of high-voltage and high-efficiency applications. The LM5109MA's fast rise and fall times, combined with its peak output current capability, ensure efficient switching and reliable performance. While newer alternatives may be available, the LM5109MA remains a robust for solution engineers seeking a reliable gate driver in their power management designs.

LM5109MA Documents

Download datasheets and manufacturer documentation for LM5109MA