3-Phase Brushless Motor Pre-Driver
Design Files
Receive the full breakdown. See the product footprint and more in the eCad file.
Three Phase Field Effect Transistor Pre-driver
The NXP® MC34937A is a field effect transistor (FET) pre-driver designed for three-phase motor control and similar applications.
- The integrated circuit (IC) uses SMARTMOS® technology
- The IC contains three high side FET pre-drivers and three low side FET pre-drivers
- Three external bootstrap capacitors provide gate charge to the high side FETs
- The IC interfaces to a MCU via six direct input control signals, a SPI port for device setup and fault detection, an asynchronous reset, an interrupt and two enable signals
- Both 5 and 3 V logic level inputs are accepted and 5 V logic level outputs are provided
Product Details
Features
System Features
- Extended supply voltage operating range: 6 to 58 V
- Wide dead time range (50 ns to 12 μs) programmable via the SPI port
- External FET gate drive capability of >1.0 A with protection
- Charge pump ensures sufficient external FET drive at low supply voltages
- Device protection against reverse charge-injection from CGD and CGS of external FETS
- Integrated overcurrent, desaturation, and phase fault-detection
- Immunity against positive or negative transient voltage spikes on the gate driver
- Current shoot-through protection built into dead time control
- Supports direct 3.3 V and 5 V logic interface to MCUs
- Integrated current sensing amplifier
- Device configuration and diagnostics through the SPI
- Parallel, SPI interface and input control
- Load current(IL) 1 A (Typ)
- 6 Channels
- Drain-to-Source on resistance 0, 5500 mOhm RDS(ON) (Typ)
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Documentation
Quick reference to our documentation types.
4 documents
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Application Note
AN2409, Small Outline Integrated Circuit (SOIC) Package - Application NoteFeatured
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Data Sheet
MC34937, Three Phase Field Effect Transistor Pre-driver - Data SheetFeatured
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Application Note
AN3670, Implementing a DSI Network Using the MC33781 and the MC33784
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Selector Guide
Motor Driver – Selector Guide
Design Resources
Hardware
Quick reference to our
board types.
2 hardware offerings
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Evaluation and Development BoardsEvaluation Kit - 33937, Three-Phase FET Pre-DriverFeatured
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Evaluation and Development BoardsLow-Voltage, 3-Phase Motor Control Tower® System Module
Software
Quick reference to our software types.
1 software file
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Application Example Software
Embedded SW: Three-Phase Brushless Motor Pre-Driver Software Driver for GD3000, MC33937 and MC34937
Note: For better experience, software downloads are recommended on desktop.