General Description
BD63621MUV is a bipolar low-consumption driver that driven by PWM current. Rated power supply voltage of the device is 36 V, and rated output current is 2.0 A. CLK-IN driving mode is adopted for input interface, and excitation mode is corresponding to FULL STEP mode , HALF STEP mode ( 2 kinds), QUARTER STEP mode 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.

FEATUREs
■ Rated output current（DC） 2.0A
■ Low ON resistance DMOS output
■ CLK-IN drive mode
■ PWM constant current (other oscillation)
■ Built-in spike noise cancel function (external noise
   filter is unnecessary)
■ Full -, half (2 kinds)-, quarter step functionality
■ Freely timing 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)
■ Adjacent pins short protection
■ Microminiature, ultra-thin and high heat-radiation
   (exposed metal type) package

APPLICATION
■ PPC, multi-function printer, laser beam printer, and
   ink-jet printer
■ Monitoring camera and WEB camera
■ Sewing machine
■ Photo printer, FAX, scanner and mini printer
■ Toy and robot