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MP6508A 2.7-18V, 1.2A Bipolar Stepper Motor Driver in a QFN-16 (3mmx3mm) Package
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pMPS MP6508A — Bipolar Stepper Motor Driver in a QFN-16 (3mmx3mm) Package, 2.7-18V input, 1.2 A output, QFN-16./p
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MP6508A 2.7-18V, 1.2A Bipolar Stepper Motor Driver in a QFN-16 (3mmx3mm) Package
The MPS MP6508A is a Bipolar Stepper Motor Driver in a QFN-16 (3mmx3mm) Package. It operates from a 2.7 V to 18 V input and is rated for 1.2 A. It is supplied in a QFN-16 package.
The MP6508A is a bipolar stepper motor driver with dual, built-in full-bridges consisting of N- channel power MOSFETs.
Key Specifications
| Part Number | MP6508A |
| Function | Bipolar Stepper Motor Driver in a QFN-16 (3mmx3mm) Package |
| Input Voltage | 2.7 V to 18 V |
| Current Rating | 1.2 A |
| Package | QFN-16 |
| Ordering Codes | MP6508A |
Features
- Wide 2.7V to 18V Input Voltage (VIN) Range
- Two Internal Full-Bridge Drivers
- Low On Resistance (RDS(ON)): 250mΩ High- Side MOSFET (HS-FET) and Low-Side MOSFET (LS-FET)
- Internal Charger Pump for the High-Side (HS) Driver
- Low 1.6mA Quiescent Current (IQ)
- Low 1µA Sleep Current
- Over-Current Protection (OCP)
- Thermal Shutdown and Under-Voltage Lockout (UVLO) Protection
- Fault Indication Output
- Thermally Enhanced Surface-Mount Package
Typical Application Circuit
Applications
- Point-of-Sale (POS) Printers
- Video Security Cameras
- Digital Still Cameras
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
What input voltage does the MP6508A support?
2.7 V to 18 V. The rated output is 1.2 A.
Which package and ordering codes apply to the MP6508A?
QFN-16; order codes include MP6508A.
What are the defining features of the MP6508A?
Wide 2.7V to 18V Input Voltage (VIN) Range Two Internal Full-Bridge Drivers
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