MP6519 2.5-28V, 5A H-Bridge Current Regulator QFN-19

MP6519 2.5-28V, 5A H-Bridge Current Regulator QFN-19

The MP6519 is a monolithic, step-down, current-source driver for applications that require accurate and fast current-response control.

Key Specifications

Features

• Wide 2.5V to 28V Operating Input Range
• Up to 5A Output Load Current
• ± 2% Accuracy at Full-Scale Reference
• 65mΩ RDS(ON) for Each MOSFET of H- Bridge
• 100% Duty Cycle Operation of H-Bridge
• 30kHz to 300kHz Programmable Switching Frequency
• 20kHz - 100kHz PWM Input for Current Regulation
• Programmable Full-Scale Current
• Up to 94% Efficiency
• Selectable Current Polarity Mode

Typical Application Circuit

Applications

• Current Regulators
• DC 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