MP6517A 3.3-16V Motor Driver TSOT23

MP6517A 3.3-16V Motor Driver TSOT23

The MP6517A is a single-phase BLDC motor driver with an integrated Hall sensor and power MOSFETs.

Key Specifications

Features

• Integrated Hall Sensor
• 3.3V to 16V Input Voltage Range
• Integrated Power MOSFETs: Total 850mΩ (HS + LS)
• Programmable Current Limit Up to 2A
• Speed Curve Programmable
• Soft On/Off Phase Transition
• Built-In Adjustable Speed Curve Corner Setting
• Rotational Speed Indicator (FG) or Rotor Deadlock fault indicator (RD)
• Automatic Phase Lock Detection of Winding BEMF and Current Zero-Crossing
• 12kHz to 48kHz PWM Input Frequency Range

Typical Application Circuit

Applications

• CPU Fan for Personal Computers or Servers

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