L6235D

Overview

The L6235D is a fully integrated DMOS driver for three-phase brushless DC motors, manufactured by STMicroelectronics. It utilizes MultiPower-BCD technology to combine isolated DMOS power transistors with CMOS and bipolar circuits on a single chip. The device supports an operating supply voltage range from 8 V to 52 V and delivers a peak output current of 5.6 A, with a continuous DC current rating of 2.8 A. The typical on-resistance (RDS(ON)) is 0.3 Ω at a junction temperature of 25 °C. It operates at frequencies up to 100 kHz and includes features such as non-dissipative overcurrent protection, thermal shutdown, undervoltage lockout, and diagnostic outputs.

Feature Summary

• Integrates a constant off-time PWM current controller and slow decay synchronous rectification for efficient motor drive.
• Includes decoding logic for both 60° and 120° hall effect sensors to generate the required power stage sequence.
• Provides comprehensive protection mechanisms including cross-conduction protection, thermal shutdown, and undervoltage lockout.

Applications

• Driving three-phase brushless DC motors
• Industrial automation systems requiring precise motor control
• Appliances utilizing BLDC motor technology

Procurement Notes

Verify the specific package type against project requirements, as the L6235 series is available in different configurations such as SO-24 or DIP-24. Confirm that the selected variant meets the necessary industrial grade specifications and environmental compliance standards like RoHS. Ensure that the ordering suffix corresponds to the exact pinout and packaging intended for the design implementation.

Selection Notes

Select this component when a fully integrated solution for three-phase BLDC motors is required without external gate drivers. The device is suitable for applications needing high efficiency due to low RDS(ON) and integrated freewheeling diodes. Consider the built-in hall sensor decoding logic if minimizing external components is a priority. Verify that the operating voltage and current ratings align with the specific motor characteristics.

Part Context

The L6235D belongs to the L6235 family of DMOS motor drivers designed for three-phase brushless DC motor applications. Manufactured by STMicroelectronics, these devices are part of a broader portfolio of motor control solutions. The L6235 series is known for its robust integration of power and logic functions, simplifying the design of motor control systems by reducing the number of external components required.

Replacement Considerations

The L6229 is a similar DMOS driver for three-phase brushless DC motors from STMicroelectronics. Verify compatibility regarding pinout, electrical parameters, and package dimensions before substitution. Other potential replacements may include models from different manufacturers, but thorough datasheet comparison is essential to ensure functional equivalence.

FAQ

What types of hall effect sensors does the L6235D support?

The L6235D includes decoding logic compatible with both 60° and 120° hall effect sensors.

How does the L6235D handle overcurrent conditions?

It features non-dissipative overcurrent detection and protection to safeguard the motor and driver during fault conditions.