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MP6546 3.5-22V 22V, 3A, Peak, 3-Phase BLDC Driver QFN-20
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pMPS MP6546 — 22V, 3A, Peak, 3-Phase BLDC Driver, 3.5-22V input, 3 A output, QFN-20./p
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MP6546 3.5-22V 22V, 3A, Peak, 3-Phase BLDC Driver QFN-20
The MPS MP6546 is a 22V, 3A, Peak, 3-Phase BLDC Driver. It operates from a 3.5 V to 22 V input, is rated for 3 A and switches at 1 MHz. It is supplied in a QFN-20 package.
The MP6546 is a 3-phase brushless DC (BLDC) motor driver for gimbal applications.
Key Specifications
| Part Number | MP6546 |
| Function | 22V, 3A, Peak, 3-Phase BLDC Driver |
| Input Voltage | 3.5 V to 22 V |
| Current Rating | 3 A |
| Switching Frequency | 1 MHz |
| Interface | SPI |
| Package | QFN-20 |
| Ordering Codes | MP6546, MP6546GL-0000-Z, MP6546GL-xxxx-Z |
Features
- 3.5V to 22V Operating Supply Voltage
- Three Half-Bridge Drivers
- Up to 1MHz Fast-Mode Plus for I2C
- Configurable Slave Addresses
- Supports Different Angle Sensor Inputs: o Linear Hall Sensor Input through HA/HB o Magnetic Angle Sensor through SPI/SSC Interface
- Integrated 12-Bit Analog-to-Digital Converter (ADC) for Hall Sensor
- D-Axis and Q-Axis Voltage Loop with Field- Oriented Control (FOC)
- Standby Mode to Save Quiescent Current
- Under-Voltage Lockout (UVLO), Thermal Shutdown (TSD), Over-Current Protection (OCP), Short-Circuit Protection (SCP), and Over-Voltage Protection (OVP)
- One-Time Programmable (OTP) Memory
Typical Application Circuit
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 MP6546 support?
3.5 V to 22 V. The rated output is 3 A.
Which package and ordering codes apply to the MP6546?
QFN-20; order codes include MP6546, MP6546GL-0000-Z, MP6546GL-xxxx-Z.
What are the defining features of the MP6546?
3.5V to 22V Operating Supply Voltage Three Half-Bridge Drivers
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