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Motor ICs

Dual Stepper Motor Driver

  • Dual chopper driver
  • 750mA continuous output current per channel
  • High impedance current control inputs
  • Digital filter on chip eliminates external filtering components
  • Packages (DIP22-D2/PLCC28-M2/SOP24 JEDEC 300mil(Batwing))
General Description
The NJM3773 is a switch-mode(chopper),constant-current driver with two channels: one for each winding of a two-phase stepper motor. The NJM3773 is also equipped with a Disable input to simplify half-stepping operation. The circuit is well suited for microstepping applications together with an external micro controller. The current control inputs are low current,high impedance inputs,which allows the use of unbuffered DAC or external high resistive resistor divider network. The NJM3773 contains a clock oscillator,which is common for both driver channels,a set of comparators and flip-flops implementing the switching control,and two output H-bridges,including recirculation diodes. Voltage supply requirements are +5 V for logic and +10 to +45 V for the motor. Maximum output current is 750mA per channel.
Package Information
Part Number Package OutlinePinsMaterial Declaration (RoHS/Halogen)Terminal FinishWeight(mg) (Reference)Reflow solderingFlow solderingIron solderingPacking ConditionMSLSolder Foot Print
NJM3773D2 download
22 Pure Sn 2370 - Yes Yes Non dry pack - -
NJM3773E3 download
SOP24 JEDEC 300mil
24 Pure Sn 715 Yes Yes Yes Non dry pack 1
NJM3773FM2 download
28 Pure Sn 1200 Yes Yes Yes Non dry pack 1
Sample & Buy
Part NumberPackagesStatusPacking SpecificationSample
NJM3773D2 DIP22-D2 (Active)
NJM3773E3 SOP24 JEDEC 300mil (Active)
NJM3773FM2 PLCC28-M2 (Active)