MP6604B 4.5-45V, 2.5A Simple Dual H-Bridge Driver (PHASE/EN) QFN-28

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MP6604B 4.5-45V, 2.5A Simple Dual H-Bridge Driver (PHASE/EN) QFN-28

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MPS QFN-28 Power Management Motor Drivers & Controllers

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MP6604B 4.5-45V, 2.5A Simple Dual H-Bridge Driver (PHASE/EN) QFN-28

The MPS MP6604B is a Simple Dual H-Bridge Driver (PHASE/EN). It operates from a 4.5 V to 45 V input and is rated for 2.5 A. It is supplied in a QFN-28 package.

The MP6604B is a dual H-bridge motor driver IC designed to drive stepper motors, brushed DC motors, and other loads.

Key Specifications

Part Number	MP6604B
Function	Simple Dual H-Bridge Driver (PHASE/EN)
Input Voltage	4.5 V to 45 V
Current Rating	2.5 A
Package	QFN-28
Ordering Codes	MP6604B

Features

4.5V to 45V Operating Input Voltage (VIN) Range
2.5A Maximum Output Current (IOUT)
Dual, Full H-Bridge Driver
150mΩ Low On Resistance per MOSFET
Protection Functions Include: o Over-Current Protection (OCP) o Over-Voltage Protection (OVP) o Under-Voltage Lockout (UVLO) o Thermal Shutdown o Fault Indication Output
Available in QFN-28 (4mmx5mm) and TSSOP-28EP Packages

Typical Application Circuit

Applications

Bipolar Stepper Motors
Stage Lighting
3D Printers
Laser Printers and Copiers

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.