LB1973JA-AH

Overview

The LB1973JA-AH is a stepper motor driver chip manufactured by onsemi, featuring dual full-bridge outputs in an SSOP package. It operates within a supply voltage range of 1.8 V to 7.5 V and supports a maximum collector current of 1 A with a maximum collector-emitter voltage of 7.5 V. The component measures 5.2 x 4.4 x 1.3 mm and functions reliably between -20 °C and +85 °C.

Feature Summary

• Dual full-bridge output configuration for stepper motor control
• Low-voltage operation capability starting at 1.8 V
• Surface-mount SSOP packaging for compact integration

Applications

• Stepper motor drive circuits
• Embedded motion control systems
• Consumer electronics requiring precise positioning

Procurement Notes

Verify the manufacturer designation as onsemi or ON Semiconductor, as corporate branding has changed. Confirm the specific suffix AH matches the required pinout and thermal characteristics. Ensure the SSOP package dimensions align with your PCB footprint requirements before finalizing procurement.

Selection Notes

Select this component when designing low-voltage stepper motor interfaces requiring a single-chip solution. The 1 A current rating suits small motors, while the wide operating temperature range ensures reliability in varied environments. Verify that the 7.5 V limit meets your system's power supply constraints.

Part Context

This part belongs to the LB1973 series of stepper motor drivers. It is distinct from Sanyo Denki products, which are primarily motors and actuators. The LB1973JA-AH is specifically a driver IC designed to interface with microcontrollers and control stepper motor phases via its dual bridge architecture.

Replacement Considerations

Check for direct equivalents such as the LB1973JA without suffix variations if electrical parameters match. Verify pin compatibility and thermal performance against alternative stepper driver ICs from other manufacturers offering similar voltage and current ratings.