TB67S249FTG,EL

Overview

The TB67S249FTG,EL is a bipolar stepper motor driver IC designed for single-phase control. It features an output current of 4.5 A and supports load voltages from 10 V to 47 V. The device operates on a supply voltage of 4.75 V to 5.25 V with a maximum operating frequency of 1 MHz. It utilizes a 48-VFQFN (7x7 mm) package with exposed pad for thermal management. The operational temperature range spans from -20°C to +85°C, with a power dissipation rating of 1.3 W.

Feature Summary

• Integrates Active Gain Control (AGC) technology to prevent motor stalling under high torque while reducing energy consumption in light loads.
• Employs Advanced Dynamic Mixed Decay (ADMD) mode for precise current tracking during microstepping operations.
• Incorporates Advanced Current Detection System (ACDS) to eliminate the need for external current sensing resistors.

Applications

• Precision positioning systems requiring microstep resolution up to 1/32
• Office automation equipment such as printers and scanners
• Industrial motion control modules

Procurement Notes

Verify the specific suffix EL against official Toshiba documentation to confirm tape and reel packaging specifications. Ensure the ordering part number matches the exact thermal and electrical ratings required for the target application. Cross-reference the datasheet revision date to validate parameter consistency before finalizing procurement orders.

Selection Notes

Select this component when a high-current bipolar stepper driver with integrated AGC and ADMD features is required. The 4.5 A output capability suits applications demanding significant torque. The QFN48 package offers a compact footprint suitable for space-constrained designs. Verify that the system logic levels are compatible with the parallel interface inputs.

Part Context

This IC belongs to the TB67S2xx series of stepping motor driver ICs manufactured by Toshiba Semiconductor and Storage. It shares pin compatibility with related models like the TB67S279FTG and TB67S289FTG, differing primarily in output current capacity and gain characteristics. The series represents a generation of drivers utilizing BiCD process technology for efficient motor control.

Replacement Considerations

TB67S279FTG,EL

FAQ

How does the AGC feature improve efficiency?

AGC dynamically increases current to prevent stalling under high torque conditions and restores it to nominal levels during light loads, reducing power waste compared to traditional constant current solutions.

What is the maximum step resolution supported?

The IC supports microstep resolutions up to 1/32 per quadrant through its internal CLK-In decoder.