Texas Instruments

LM5109BSD  

Gate Drivers ICs

LM5109BSD Description

The LM5109BSD from Texas Instruments is a high-performance half-bridge gate driver IC designed for robust power management in high-voltage applications. Housed in an 8-WSON package, this surface-mount device operates within a supply voltage range of 8V to 14V, making it suitable for driving both high-side and low-side N-channel MOSFETs or IGBTs in half-bridge configurations. With a maximum bootstrap voltage of 108V, it ensures reliable operation in demanding environments. Although marked as obsolete, its design remains relevant for legacy systems requiring high-speed switching and independent channel control.

LM5109BSD Features

• Independent Channel Control: Enables flexible driving of high-side and low-side switches with two independent drivers.
• Fast Switching Performance: Features 15ns rise/fall times (typical), minimizing switching losses and improving efficiency.
• High Current Drive: Delivers 1A peak output current (source/sink), ensuring quick turn-on/off of power switches.
• Wide Logic Compatibility: Supports 0.8V (VIL) and 2.2V (VIH) logic thresholds for interfacing with low-voltage controllers.
• Robust Packaging: Offered in a Tape & Reel (TR) 8-WSON package, optimized for automated assembly.
• Reliability: MSL 1 (Unlimited) moisture sensitivity and REACH Unaffected compliance enhance longevity in harsh conditions.

LM5109BSD Applications

• Motor Drives: Ideal for brushless DC (BLDC) and stepper motor control due to its high-side voltage tolerance.
• Switched-Mode Power Supplies (SMPS): Efficiently drives synchronous buck/boost converters with fast switching.
• Industrial Inverters: Suited for solar inverters and UPS systems requiring high-voltage isolation.
• Legacy Systems: A dependable choice for existing designs needing a proven half-bridge driver.

Conclusion of LM5109BSD

The LM5109BSD excels in high-voltage, high-speed switching applications, offering low propagation delays, strong gate drive, and reliable performance. While obsolete, its independent channel control and robust design make it a viable option for legacy or niche industrial systems. Engineers seeking a compact, high-performance gate driver for half-bridge topologies may still find value in this IC, particularly in motor control and power conversion scenarios.

LM5109BSD Documents

Download datasheets and manufacturer documentation for LM5109BSD

Datasheets :

LM5109B      

HTML Datasheet :

LM5109B