L298P

Full Half-Bridge (H Bridge) Drivers Overview

The L298P is a high-voltage, high-current dual full-bridge motor driver manufactured by STMicroelectronics. It is designed to accept standard TTL logic levels and drive inductive loads such as relays, solenoids, DC motors, and stepper motors. The device features two enable inputs that allow independent control of the bridges regardless of input signals. Each bridge's lower transistor emitter is connected to an external terminal for sensing current via external resistors. An additional power supply input enables the logic circuitry to operate at a lower voltage than the motor supply. Key electrical parameters include a maximum operating supply voltage of 46 V, a total DC supply current capability of up to 4 A, and low saturation voltage characteristics.

Full Half-Bridge (H Bridge) Drivers Feature Summary

• Dual H-bridge architecture capable of driving complex inductive loads including DC and stepper motors
• Integrated over-temperature protection to ensure operational safety under thermal stress
• Independent enable inputs for precise control of each bridge channel
• External current sensing terminals connected to lower transistor emitters

Full Half-Bridge (H Bridge) Drivers Applications

• Driving brushed DC motors
• Controlling stepper motors
• Actuating relays and solenoids

Full Half-Bridge (H Bridge) Drivers Procurement Notes

Verify the specific package variant, as the L298P designation typically refers to the PowerSO-20 surface-mount version, distinct from the through-hole MultiWatt15 package used in other L298 variants. Confirm the manufacturer datasheet revision to ensure compatibility with required logic levels and thermal management specifications. Cross-reference the part number suffix to confirm pinout and packaging details before procurement.

Full Half-Bridge (H Bridge) Drivers Selection Notes

Select this component when a robust, high-voltage solution is required for driving dual inductive loads directly from TTL logic. It is suitable for applications requiring independent bridge control and external current monitoring. Consider thermal dissipation requirements carefully, as the device handles significant current and voltage. Ensure the application voltage does not exceed the 46 V limit and that adequate heat sinking is provided for the chosen package type.

Full Half-Bridge (H Bridge) Drivers Part Context

The L298 series represents a long-standing line of motor drivers from STMicroelectronics, widely recognized for their simplicity and reliability in industrial and consumer electronics. The L298P specifically adapts this functionality into a surface-mount PowerSO-20 package, facilitating automated assembly and compact PCB designs compared to older through-hole alternatives while maintaining the same core electrical performance.

Full Half-Bridge (H Bridge) Drivers Replacement Considerations

Direct replacements within the same family include the L298D (MultiWatt15 package) or L298N (MultiWatt15 package). For surface-mount equivalents with identical functionality, verify availability of the L298PS or similar PowerSO-20 variants. Always check pin-to-pin compatibility and thermal resistance values when substituting.