LB1940U-TLM-E

Full Half-Bridge (H Bridge) Drivers Overview

The LB1940U-TLM-E is a half-bridge driver IC manufactured by onsemi, designed for controlling DC motors, universal motors, and bipolar stepper motors. It features four half-bridge outputs with a continuous output current of 400mA per channel. The device operates within a supply voltage range of 1.9V to 6.5V and supports load voltages from 1.6V to 7.5V. It utilizes a logic interface and is packaged in a 20-VFSOP (20-MSOP) surface-mount case. The component is rated for an operating temperature range of -20°C to 85°C (TA).

Full Half-Bridge (H Bridge) Drivers Feature Summary

• Integrated four-channel half-bridge driver architecture suitable for bipolar motor control applications.
• Supports low-voltage operation with a supply range extending down to 1.9V.
• Designed for inductive loads including DC, universal, and stepper motors.

Full Half-Bridge (H Bridge) Drivers Applications

• DC motor control systems
• Universal motor drive circuits
• Bipolar stepper motor positioning

Full Half-Bridge (H Bridge) Drivers Procurement Notes

Verify the current lifecycle status before design finalization, as this part may be discontinued or subject to specific ordering requirements. Confirm package availability and moisture sensitivity level (MSL 3) during storage planning. Cross-reference the manufacturer's official documentation for any recent product change notices or environmental compliance updates prior to procurement.

Full Half-Bridge (H Bridge) Drivers Selection Notes

Select this component when designing low-voltage motor control circuits requiring integrated half-bridge drivers. Ensure the application load voltage does not exceed 7.5V and the required current remains within the 400mA per channel limit. Verify that the 20-MSOP package dimensions fit the PCB layout constraints and that the operating temperature range meets the system's thermal requirements.

Full Half-Bridge (H Bridge) Drivers Part Context

This component belongs to the LB1940 family of motor drivers from onsemi. It falls under the PMIC category, specifically within power management ICs for motor and motion control. The device is distinct from full-bridge drivers and is optimized for simpler bipolar motor topologies rather than complex multi-phase systems.

Full Half-Bridge (H Bridge) Drivers Replacement Considerations

Check for direct pin-to-pin replacements within the same family or newer generations from onsemi. Verify compatibility with existing PCB footprints and electrical specifications if substituting with similar half-bridge drivers from other manufacturers.

Full Half-Bridge (H Bridge) Drivers FAQ

What is the maximum supply voltage for the LB1940U-TLM-E?

The maximum supply voltage is 6.5V.

Is this device suitable for unipolar stepper motors?

No, it is specified for bipolar stepper motors due to its half-bridge configuration.