LM5109BSDX/NOPB

Overview

The LM5109BSDX/NOPB is a high-voltage half-bridge gate driver manufactured by Texas Instruments. It features two independent drivers configured for high-side and low-side MOSFET control within an LLP-8 surface-mount package. The device operates with a supply voltage range of 8 V to 14 V and delivers a peak output current of 1 A. Key electrical characteristics include a maximum propagation delay of 32 ns, with rise and fall times of 15 ns each. It supports TTL logic inputs and functions reliably across an operating temperature range from -40 °C to +125 °C.

Feature Summary

• Provides independent high-side and low-side gate drive capabilities for half-bridge configurations
• Supports TTL-compatible logic input signals for straightforward interface integration
• Delivers 1 A peak output current to effectively switch external power MOSFETs

Applications

• High-voltage motor control systems requiring precise half-bridge switching
• Industrial power conversion circuits utilizing isolated or non-isolated topologies
• General-purpose high-side and low-side MOSFET driving in power management designs

Procurement Notes

Verify the specific suffix 'X' against the manufacturer's official documentation to confirm tape-and-reel packaging configuration. Ensure the component meets RoHS compliance requirements as indicated by the 'NOPB' designation. Cross-reference the LLP-8 package outline with your PCB footprint library to guarantee mechanical compatibility before finalizing procurement orders.

Selection Notes

Select this component when a compact half-bridge solution with 1 A drive strength is required. The LLP-8 package offers space efficiency compared to larger SOIC variants. Consider the 15 ns transition times for applications demanding moderate switching speeds. Verify that the 8 V minimum supply voltage aligns with your system's available rail for proper internal biasing and operation.

Part Context

This part belongs to the LM5109B series of high-voltage gate drivers designed for robust performance in demanding power electronics environments. It serves as a specialized interface between low-voltage control logic and high-voltage power stages. The device integrates essential protection features and drive capabilities into a small form factor, supporting various industrial and commercial power conversion architectures.

Replacement Considerations

The LM5109BSD/NOPB is a direct pin-compatible alternative differing primarily in shipping packaging rather than functional specifications. Both parts share identical electrical parameters and the LLP-8 package. Verify that any substitute maintains the same 1 A peak current capability and 15 ns switching speed to ensure circuit performance parity.