L6225PD

Overview

The L6225PD is a dual full-bridge motor driver IC manufactured by STMicroelectronics, designed for bipolar stepper and brushed DC motor control applications. It utilizes MultiPower-BCD technology to integrate isolated DMOS power transistors with CMOS and bipolar circuits on a single chip. The device operates within an 8V to 52V supply voltage range and delivers a typical peak output current of 2.8A per bridge, with a 1.4A DC rating. Packaged in a PowerSO-20 surface-mount configuration, it features a low on-resistance of 0.73Ω at 25°C junction temperature.

Feature Summary

• Integrates fast free-wheeling diodes and non-dissipative overcurrent protection for high-side PowerMOSFETs.
• Includes thermal shutdown and under-voltage lockout mechanisms to ensure operational safety.
• Supports cross-conduction protection and allows for paralleled operation to increase current capacity.
• Enables operating frequencies up to 100kHz for efficient motor control performance.

Applications

• Bipolar stepper motor control systems
• Brushed DC motor drive circuits
• Industrial automation actuators
• General-purpose motor control interfaces

Procurement Notes

Verify the specific package variant, as the L6225 family includes PowerDIP20, PowerSO20, and SO20 options. Confirm that the required current handling aligns with the 2.8A peak specification. Ensure thermal management strategies are adequate for the intended duty cycle. Check RoHS compliance status if environmental regulations apply to the final assembly.

Selection Notes

Select this component when a dual H-bridge solution is required for driving two-phase loads or controlling a single brushed DC motor with reverse capability. Consider the 0.73Ω on-resistance for efficiency calculations. Evaluate the need for paralleling multiple units if continuous currents exceed the 1.4A DC limit. Verify compatibility with the system's logic voltage levels and PWM frequency requirements.

Part Context

The L6225 belongs to the STSPIN L62 series of motor drivers from STMicroelectronics. This series focuses on providing integrated solutions for various motor types, combining power stages with control logic. The L6225 specifically targets applications requiring robust dual-bridge capabilities without external discrete components, simplifying the design process for industrial and consumer motor drives.

Replacement Considerations

The L6205 is a documented substitute within the same product line, offering similar dual full-bridge functionality but with different electrical characteristics such as lower on-resistance and higher current ratings. Designers should review datasheet differences regarding thermal performance and pinout compatibility before swapping parts.