Integrated H-bridge IC simplifies design of motor driver circuits

MPQ6615 and MPQ6615-AEC1 ICs from Monolithic Power Systems provide a complete solution for driving motors operating from an input voltage up to 40 V, and with an output current up to 8 A.

The MP6615 from Monolithic Power Systems is an integrated H-bridge dc motor driver which implements a full bridge made up of four N-channel power MOSFETs. The motor driver also integrates pre-drivers, gate driver power supplies, and bidirectional current-sense amplifiers, enabling designers to reduce component count, simplify their board layout and save space.

The motor driver is also available in an AEC-Q100 grade 1 qualified version, with the part number MPQ6615-AEC1. Both parts operate over an input-voltage range of 4.75 V to 40 V. 

The MP6615’s 11 mΩ MOSFETs supply a continuous output current of up to 8 A. An internal charge pump is used to supply the gate driver for the high-side MOSFETs. A trickle charge circuit maintains a sufficient voltage at the gate driver to operate at a 100% duty cycle.

Internal safety features include thermal shutdown, under-voltage lockout, and over-current protection.

The MP6615 is supplied in a 6 mm x 6 mm TQFN-26 package.