L6227Q

Overview

The L6227Q is a DMOS dual full bridge driver designed for motor control applications, realized in BCD multipower technology. It integrates isolated DMOS power transistors with CMOS and bipolar circuits on the same chip. The device features two independent constant off-time PWM current controllers for chopping regulation. It operates within an 8 V to 52 V supply voltage range and delivers a peak output current of 2.8 A (1.4 A DC). The typical RDS(on) is 0.73 Ω at TJ = 25 °C. Operating frequency reaches up to 100 kHz. The component is available in a VQFPN32 5 mm x 5 mm package.

Feature Summary

• Dual independent constant off-time PWM current controllers for chopping regulation
• Non-dissipative overcurrent protection on high-side power MOSFETs
• Thermal shutdown and cross-conduction protection mechanisms
• Integrated fast free-wheeling diodes with slow decay synchronous rectification

Applications

• Driving two-phase bipolar stepper motors with currents up to 1A DC
• Controlling multiple DC motors
• Managing various inductive loads

Procurement Notes

Verify the specific ordering suffix and package variant when sourcing, as availability may vary by region. Confirm RoHS compliance status through official STMicroelectronics documentation prior to integration. Ensure thermal management solutions align with the specified operating temperature range and power dissipation characteristics defined in the datasheet.

Selection Notes

Select this component for applications requiring integrated PWM current control and robust protection features. The dual full-bridge architecture supports complex motor driving topologies. Consider the VQFPN32 package constraints for PCB layout. Evaluate thermal performance under maximum load conditions to ensure reliable operation within the specified voltage and current limits.

Part Context

The L6227Q belongs to STMicroelectronics' L622x series of DMOS dual full bridge drivers. This family targets motor control systems, offering varying levels of integration and protection. The L6227Q specifically distinguishes itself with built-in PWM current controllers, differentiating it from non-PWM variants like the L6226Q.

Replacement Considerations

The L6227 is a related variant within the same product line. Verify functional equivalence regarding PWM controller presence and electrical parameters before substitution. Consult official replacement guides for confirmed compatible alternatives.