MP6514 2.5-14V H-Bridge Motor Driver QFN-8

MP6514 2.5-14V H-Bridge Motor Driver QFN-8

The MP6514 is an H-bridge motor driver that consists of four N-channel power MOSFETs.

Key Specifications

Features

• Wide 2.5V to 14V Operating Input Range
• Peak Current: 0.6A
• Low MOSFET On Resistance (HS: 500mΩ, LS: 500mΩ)
• Crossover Current Protection
• Low Standby Circuit Current when All Inputs Are Low
• Thermal Shutdown
• Internal Charge Pump
• Cycle-by-Cycle Over-Current Protection (OCP)
• Short-Circuit Protection (SCP)
• Available in a UTQFN-8 (2mmx2mm) Package

Typical Application Circuit

Applications

• Consumer Products

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