MP6543HGL-A-Z

Overview

The MP6543HGL-A-Z is a discontinued three-phase power stage designed for brushless DC motor applications. It integrates three half-bridges comprising six N-channel power MOSFETs, pre-drivers, gate drive power supplies, and current sense amplifiers. The device supports a supply voltage range of 3V to 22V and delivers up to 2A continuous output current. It features independent high-side and low-side inputs for each bridge, an internal charge pump enabling 100% duty cycle operation, and a built-in 3.3V/100mA LDO regulator. Protection mechanisms include over-current protection with adjustable thresholds, over-temperature shutdown, and under-voltage lockout.

Feature Summary

• Integrates three half-bridges with independent high-side and low-side inputs for precise control
• Supports 100% duty cycle operation via internal charge pump and trickle charging circuit
• Includes integrated bidirectional current-sense amplifiers and adjustable over-current protection
• Features automatic synchronous rectification and built-in thermal and voltage protection

Applications

• Three-phase Brushless DC (BLDC) motors
• Permanent Magnet Synchronous Motors (PMSM)
• Robotics systems
• Drones

Procurement Notes

Verify component status as the MP6543HGL-A-Z is officially listed as obsolete and no longer manufactured. Confirm availability of parameter-equivalent replacement parts such as the MP6543HGL-B series before finalizing design specifications. Ensure that any substitute components meet the required electrical parameters and package dimensions for seamless integration into existing hardware designs.

Selection Notes

Select this component for designs requiring a fully integrated three-phase driver with independent input control. The MP6543HGL-A-Z is suitable for applications needing 2A continuous current capability within a compact QFN-24 package. Consider the specific input configuration requirements, as this variant utilizes independent high-side and low-side signals rather than PWM or Hall sensor inputs found in other family members.

Part Context

This part belongs to the MP6543 family of three-phase BLDC motor drivers from Monolithic Power Systems. Unlike the standard MP6543 which uses ENABLE and PWM inputs, or the MP6543B which accepts Hall signals, the MP6543A variant provides independent high-side and low-side inputs for each half-bridge. This allows for greater flexibility in driving configurations compared to the single-input variants.

Replacement Considerations

Public confirmed substitutes include MP6543HGL-B-P and MP6543HGL-B-Z. These are listed as parameter-equivalent replacements for the discontinued MP6543HGL-A-Z. Verify pin compatibility and input signal logic differences when transitioning to the B-series variants.

FAQ

What type of input signals does the MP6543HGL-A-Z support?

The MP6543HGL-A-Z supports independent high-side and low-side inputs for each half-bridge, distinguishing it from the PWM-based MP6543 or Hall-input MP6543B.

Does the MP6543HGL-A-Z support 100% duty cycle operation?

Yes, the device includes an internal charge pump and trickle charging circuit to maintain sufficient gate drive voltage, allowing for 100% duty cycle operation.