MP6540HGU-A-Z

Overview

The MP6540HGU-A-Z is a three-phase power stage from Monolithic Power Systems, designed for brushless DC motor control. It integrates six N-channel power MOSFETs into three half-bridges with pre-drivers and gate drive supplies. The device features independent high-side and low-side inputs rather than PWM/ENBL combinations. It supports a supply voltage range of 5.5 V to 50 V and delivers up to 5 A continuous output current in a QFN-26 (5 mm x 5 mm) package. Internal circuitry includes an integrated bidirectional current sampling amplifier and automatic synchronous rectification.

Feature Summary

• Integrates three half-bridges with independent high-side and low-side inputs for flexible control logic
• Includes internal charge pump and trickle charging circuit to maintain gate drive voltage for 100% duty cycle operation
• Features integrated bidirectional current sampling amplifier for direct current sensing without external components
• Provides comprehensive protection mechanisms including over-temperature shutdown, under-voltage lockout, and over-current protection

Applications

• Brushless DC motor drives requiring independent phase control
• Industrial automation systems utilizing three-phase motor stages
• Motion control applications needing integrated current sensing

Procurement Notes

Verify the suffix 'A' indicates independent HS/LS inputs distinct from standard PWM/ENBL variants. Confirm the 'Z' suffix denotes lead-free and RoHS compliance status. Ensure the QFN-26 package dimensions match the PCB footprint requirements. Check humidity sensitivity classification for proper storage and reflow soldering profiles. Validate that the 50V maximum rating aligns with the target system bus voltage.

Selection Notes

Select this component when independent high-side and low-side signal inputs are required instead of combined PWM and enable signals. Choose the MP6540HGU-A-Z for applications operating within the 5.5 V to 50 V range requiring up to 5 A continuous current. Consider the integrated current sense amplifier if external sensing resistors and amplifiers are to be avoided. Opt for this QFN-26 package for compact designs where thermal dissipation capabilities meet the 5.58 W power dissipation limit.

Part Context

This part belongs to the MP6540 series of monolithic three-phase power stages. It shares core architecture with the MP6540HGU-Z but differs in input configuration. While the MP6540HGU-Z uses PWM and ENBL inputs, the MP6540HGU-A-Z utilizes separate high-side and low-side inputs. Both variants offer similar current handling and protection features within the same QFN-26 footprint.

Replacement Considerations

MP6540HGU-Z serves as a functional substitute if PWM and ENBL inputs are acceptable. MP6540AGU-Z offers similar functionality but is rated for lower voltages and currents.