MP6536 5-26V 26V, 5.5A 3-Channel Half-Bridge Driver QFN-40

MP6536 5-26V 26V, 5.5A 3-Channel Half-Bridge Driver QFN-40

The MP6536 is a 3-channel half-bridge driver IC intended to drive a 3-phase brushless DC motor.

Key Specifications

Features

• 5V to 26V VDD
• ±5.5A Peak Current Output
• Up to 1MHz PWM Frequency
• Protected Integrated Power 0.14Ω Switches
• 10ns Switch Dead Time
• All Switches Current Limited
• Internal Under-Voltage Protection
• Internal Thermal Protection
• Short-Circuit Protection
• Fault Output Flag

Typical Application Circuit

Design Notes

• Set dead time to match the external FET turn-off, not the datasheet typical. Too little risks shoot-through, too much distorts the current waveform at low duty cycle.
• Use a Kelvin connection for the current-sense resistor; shared copper injects switching noise straight into the sense amplifier.
• The thermal pad is the only heat path for most packages — via-stitch it to a ground plane with at least 9 vias.
• PWM frequency trades switching loss against current ripple in the motor inductance; 20 kHz keeps the drive out of the audible band.
• Add a brake or coast path so regeneration during a fast stop does not pump the supply rail.

Common Questions