MP6605C 4.5-60V Low-Side Driver QFN-24

MP6605C 4.5-60V Low-Side Driver QFN-24

The MP6605C is a 4-channel, low-side driver IC with an I2C interface.

Key Specifications

Features

• Wide 4.5V to 60V Input Voltage (VIN) Range
• 60V Maximum Winding Clamp Voltage
• Four Low-Side MOSFETs (LS-FETs) and Clamp Diodes
• 350mΩ MOSFET On Resistance
• 1.5A (One Channel On) or 700mA (Four Channels On) Maximum Output Current (IOUT)
• Over-Current Protection (OCP)
• Under-Voltage Lockout Protection (UVLO)
• Over-Temperature Protection (OTP)
• Fault Indication Output
• No Control Power Supply Required

Typical Application Circuit

Applications

• Unipolar Stepper Motors

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