LM5100M/NOPB Half-Bridge Gate Driver IC Equivalent & Substitute Parts

Part Overview

The LM5100M/NOPB is a half-bridge gate driver IC manufactured by Texas Instruments, designed for driving N-channel MOSFETs in half-bridge configurations. This device operates with a supply voltage range of 9V to 14V and features independent dual-channel architecture with non-inverting inputs. The part is classified as obsolete, making identification of suitable substitute components essential for ongoing system support and new design implementations.

Substiute Parts

LM5100M/NOPB

Texas InstrumentsIn Stock: 966LM5100M/NOPB Datasheet

Current PartRFQ

LM5100AMX/NOPB

National SemiconductorIn Stock: 8060LM5100AMX/NOPB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LM5100M/NOPB is determined by the following critical parameters:

• Driven Configuration: Must be half-bridge topology
• Number of Drivers: Must be 2 independent channels
• Gate Type: Must be N-channel MOSFET compatible
• Voltage - Supply: Must support 9V ~ 14V operating range
• Input Type: Must be non-inverting
• Package / Case: Must be 8-SOIC form factor for mechanical compatibility
• High Side Voltage - Max (Bootstrap): Must support minimum 118V
• Operating Temperature Range: Must cover -40°C ~ 125°C

The LM5100AMX/NOPB meets all substitution criteria while offering enhanced electrical performance characteristics, particularly in peak output current and switching speed specifications.

Parameter Comparison

Engineering Selection Recommendations

The LM5100AMX/NOPB is the qualified substitute for the obsolete LM5100M/NOPB. Selection is based on the following engineering criteria:

Functional Compatibility: Both devices share identical half-bridge gate driver architecture, dual independent channels, and non-inverting input configuration. Pin-to-pin compatibility is maintained within the 8-SOIC package.

Supply and Logic Voltage Alignment: Both parts operate within the 9V to 14V supply range with compatible logic voltage thresholds, ensuring direct integration into existing circuit designs without modification.

Thermal and Environmental Compliance: Both devices maintain the -40°C to 125°C operating temperature range and meet ROHS3 compliance requirements, supporting equivalent environmental and regulatory standards.

Active Product Status: The LM5100AMX/NOPB maintains active product status with established supply chain availability, addressing the obsolescence of the original LM5100M/NOPB.

Performance Enhancement: The substitute part provides increased peak output current (3A versus 1.6A) and faster switching characteristics (430ns/260ns rise/fall time versus 600ns/600ns), delivering improved performance margins without compromising compatibility.

Frequently Asked Questions (FAQ)

Q: Can the LM5100AMX/NOPB be used as a direct replacement for the LM5100M/NOPB?

A: Yes. Both devices are half-bridge gate drivers with identical supply voltage ranges, logic voltage specifications, bootstrap voltage ratings, and 8-SOIC packaging. No circuit modifications are required for substitution.

Q: What are the key differences between these two parts?

A: The primary differences are product status and electrical performance. The LM5100AMX/NOPB is an active product with higher peak output current (3A versus 1.6A) and faster switching times (430ns/260ns versus 600ns/600ns). These enhancements provide improved performance margins while maintaining full compatibility.

Q: Are there any package or pinout differences?

A: No. Both parts use the 8-SOIC package with identical 0.154" width and 3.90mm dimensions. Pinout compatibility is maintained, allowing direct PCB substitution.

Q: What is the logic voltage threshold difference between the two parts?

A: The LM5100M/NOPB specifies VIL and VIH at 3V and 8V respectively. The LM5100AMX/NOPB specifies VIL at 2.3V with VIH not specified in the provided data. Both operate within compatible logic voltage ranges for standard digital control signals.

Q: Does the substitute part meet the same compliance standards?

A: The LM5100AMX/NOPB maintains ROHS3 compliance and equivalent environmental standards. Both parts are classified under the same ECCN (EAR99) and HTSUS codes, supporting equivalent regulatory requirements.

Q: What is the bootstrap voltage rating for both parts?

A: Both the LM5100M/NOPB and LM5100AMX/NOPB support a maximum bootstrap voltage of 118V, maintaining identical high-side voltage capability for half-bridge applications.