MP1922 3A Half-Bridge Pre-Driver IC QFN-22

MP1922 3A Half-Bridge Pre-Driver IC QFN-22

The MP1922 is a 100V, single-channel, integrated circuit (IC), half-bridge gate driver designed for motor driver applications and other power control applications.

Key Specifications

Features

• Supports 100V Supply Operation
• 3A Source, 4A Sink Gate Drive Current
• Internal Charge Pump and Auto-Refresh for High-Side (HS) Gate Drive
• Integrated Current-Sense Amplifier
• Low-Power Sleep Mode
• Programmable Controlled Slew Rate
• Desaturation Protection of External MOSFETs
• Thermal Shutdown
• Under-Voltage Lockout (UVLO)
• Fault Indication Output

Typical Application Circuit

Applications

• Brushless DC (BLDC) Motors and Permanent Magnet Synchronous Motor (PMSM) Drives
• High-Current Brushed DC Motor Drives
• Automotive Pumps, Fans, Superchargers, and Actuators
• Power Drills

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