MP6523 0.9A Triple Half-Bridge Motor Driver QFN-24

MP6523 0.9A Triple Half-Bridge Motor Driver QFN-24

The MP6523 is a triple, half-bridge, DMOS, output driver with integrated power MOSFETs that can drive up to three different loads.

Key Specifications

Features

• Up to 0.9A Output Current
• RDS(ON) (HS + LS) Typically 1.1Ω at 25°C, Maximum 2Ω at 150°C
• Very Low Quiescent Current IVS < 6μA in Standby Mode Versus Total Temperature Range
• Outputs Short-Circuit Protection
• Over-Temperature Protection and Pre- Warning
• Under-Voltage Protection (UVP)
• Serial Data Interface
• Various Diagnostic Functions: Shorted Output, Open-Load, Over-Temperature, and Under-Voltage
• Fault Output Flag
• Daisy Chaining Possible

Typical Application Circuit

Applications

• Drives Various Loads in Automotive and Industrial Applications

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