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MP6637A 2.5-5.5V, 1.3A Sensorless Sinusoidal BLDC Motor Driver SOT583
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pMPS MP6637A — Sensorless Sinusoidal BLDC Motor Driver, 2.5-5.5V input, 1.3 A output, SOT583./p
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MP6637A 2.5-5.5V, 1.3A Sensorless Sinusoidal BLDC Motor Driver SOT583
The MPS MP6637A is a Sensorless Sinusoidal BLDC Motor Driver. It operates from a 2.5 V to 5.5 V input, is rated for 1.3 A and switches at 30 kHz. It is supplied in a SOT583 package.
The MP6637A is a three-phase, sensorless, brushless DC (BLDC) motor driver with integrated power MOSFETs.
Key Specifications
| Part Number | MP6637A |
| Function | Sensorless Sinusoidal BLDC Motor Driver |
| Input Voltage | 2.5 V to 5.5 V |
| Current Rating | 1.3 A |
| Switching Frequency | 30 kHz |
| Interface | PWM |
| Package | SOT583 |
| Ordering Codes | MP6637A |
Features
- 2.5V to 5.5 Input Voltage (VCC) Operating Range
- Up to 1.3A of Peak Phase Current
- Up to 0.9A of RMS Phase Current
- Sinusoidal Sensorless Drive
- Integrated 350mΩ High-Side MOSFETs (HS FETs) and Low-Side MOSFETs (LS- FETs)
- Supports 1kHz to 100kHz Pulse-Width Modulation (PWM) Input
- Power-Save Mode
- 30kHz Switching Frequency (fSW)
- Current Limiting
- Short-Circuit Protection (SCP)
Typical Application Circuit
Applications
- Notebook Fans
- Gaming Fans
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 MP6637A support?
2.5 V to 5.5 V. The rated output is 1.3 A.
Which package and ordering codes apply to the MP6637A?
SOT583; order codes include MP6637A.
What are the defining features of the MP6637A?
2.5V to 5.5 Input Voltage (VCC) Operating Range Up to 1.3A of Peak Phase Current
Shenzhen Gaorunxin Technology Co., Ltd
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