36V High-performance, High-reliability Withstand Voltage Stepper Motor Driver

BD63730EFV is a low-power motor driver that drives load by PWM current. Rated power supply voltage of the device is 36V, and rated output current is 3.0A. The input interface are interchangeable between CLK-IN drive mode and the PARALLEL-IN drive mode, and excitation mode is corresponding to FULL STEP, HALF STEP (2 types), and QUARTER STEP modes via a built-in DAC. In terms of current decay, the FAST DECAY/SLOW DECAY ratio may be set without any limitation, and all available modes may be controlled in the most appropriate way. In addition, the power supply may be driven by one single system, which simplifies the design.

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* This is a standard-grade product.
For Automotive usage, please contact Sales.

Product Detail

Part Number | BD63730EFV-E2
Status | Recommended
Package | HTSSOP-B54
Unit Quantity | 1500
Minimum Package Quantity | 1500
Packing Type | Taping
RoHS | Yes




Vcc (Max.)[V]


Power Supply Voltage (Max.) [V]


Power Supply Voltage (Min.) [V]


Iout (Max.)[A]


Iout Peak (Max.)[A]


Output On Resistance (Typ.)[Ω]





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MIX DECAY Function


Single power supply input


Automotive class


Operating Temperature (Min.)[°C]


Operating Temperature (Max.)[°C]


Package Size [mm]

18.5x9.5 (t=1)


  • Rated output current of 3.0A DC
  • Low ON-Resistance DMOS output
  • CLK-IN drive mode
  • PARALLEL-IN drive mode
  • PWM constant current control (other oscillation)
  • Built-in spike noise cancel function (external noise filter is unnecessary)
  • Full-step, half-step (two types), and quarter-step functionality
  • Dynamic excitation mode switch
  • Current decay mode switch (linearly variable FAST/SLOW DECAY ratio)
  • Normal rotation & reverse rotation switching function
  • Power save function
  • Built-in logic input pull-down resistor
  • Power-ON reset function
  • Thermal shutdown circuit (TSD)
  • Over-current protection circuit (OCP)
  • Under voltage lock out circuit (UVLO)
  • Over voltage lock out circuit (OVLO)
  • Ghost Supply Prevention (protects against malfunction when power supply is disconnected)
  • Electrostatic discharge: 4kV (HBM specification)
  • Adjacent pins short protection
  • Micro miniature, ultra-thin and high heat-radiation (exposed metal type) package

Design Resources


Technical Articles

Schematic Design & Verification

  • Method for Monitoring Switching Waveform
  • Importance of Probe Calibration When Measuring Power: Deskew
  • Impedance Characteristics of Bypass Capacitor

Thermal Design

  • What Is Thermal Design
  • Basics of Thermal Resistance and Heat Dissipation
  • Method for Calculating Junction Temperature from Transient Thermal Resistance Data
  • Notes for Temperature Measurement Using Thermocouples
  • Two-Resistor Model for Thermal Simulation
  • Notes for Temperature Measurement Using Forward Voltage of PN Junction
  • Thermal Resistance
  • Precautions When Measuring the Rear of the Package with a Thermocouple



  • HTSSOP-B54 Footprint / Symbol

Packaging & Quality

Package Information

  • Package Information
  • Anti-Whisker formation

Manufacturing Data

  • Factory Information

Environmental Data

  • UL94 Flame Classifications of Mold Compound
  • Compliance with the ELV directive
  • REACH SVHC Non-use Declaration
  • RoHS Comission Delegated Directive

Export Information

  • The Export Control Order
  • Export Administration Regulations(EAR)