UC3717AN ,Stepper Motor Drive CircuitMAXIMUM RATINGS (Note 1)Voltage Logic Supply, VCC . . . . . . . . . . . . . . . . . . . . . . . ..
UC3717AQ ,Stepper Motor Drive CircuitUC3717AStepper Motor Drive Circuit
UC3717Q , STEPPER MOTOR DRIVE CIRCUIT
UC3726DWP , ISOLATED DRIVE TRANSMITTER
UC3770AN ,High Performance Stepper Motor Drive CircuitUC3770AUC3770BHigh Performance Stepper Motor Drive Circuit
UC3770AQ ,High Performance Stepper Motor Drive CircuitUC3770AUC3770BHigh Performance Stepper Motor Drive Circuit
UMF5N , Power management (dual transistors)
UMF5N , Power management (dual transistors)
UMG10N , General purpose (dual digital transistors)
UMG11N , Emitter common (dual digital transistors)
UMG1N , General purpose (dual digital transistors)
UMG1N , General purpose (dual digital transistors)
UC3717AN-UC3717AQ
Stepper Motor Drive Circuit
Full-Step, Half-Step and Micro-StepCapability Bipolar Output Current up to 1A Wide Range of Motor Supply Voltage
10-46V Low Saturation Voltage with Integrated
Bootstrap Built-In Fast Recovery Commutating
Diodes Current Levels Selected in Steps or Varied
Continuously Thermal Protection with Soft Intervention
Stepper Motor Drive Circuit
The UC3717A is an improved version of the UC3717, used to switch
drive the current in one winding of a bipolar stepper motor. The
UC3717A has been modified to supply higher winding current, more
reliable thermal protection, and improved efficiency by providing inte-
grated bootstrap circuitry to lower recirculation saturation voltages.
The diagram shown below presents the building blocks of the
UC3717A. Included are an LS-TTL compatible logic input, a current
sensor, a monostable, a thermal shutdown network, and an H-bridge
output stage. The output stage features built-in fast recovery com-
mutating diodes and integrated bootstrap pull up. Two UC3717As
and a few external components form a complete control and drive
unit for LS-TTL or micro-processor controlled stepper motor systems.
The UC3717A is characterized for operation over the temperature
range of 0°C to +70°C.
UC3717A
BLOCK DIAGRAM
FEATURES DESCRIPTIONVoltage
Logic Supply, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7V
Output Supply, Vm. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50V
Input Voltage
Logic Inputs (Pins 7, 8, 9) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6V
Analog Input (Pin 10). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . VCC
Reference Input (Pin 11) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15V
Input Current
Logic Inputs (Pins 7, 8, 9) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -10mA
Analog Inputs (Pins 10, 11). . . . . . . . . . . . . . . . . . . . . . . . . . . . -10mA
Output Current (Pins 1, 15) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±1.2A
Junction Temperature, TJ. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +150°C
Storage Temperature Range, TS . . . . . . . . . . . . . . . . . . -55°C to +150°C
ABSOLUTE MAXIMUM RATINGS (Note 1)Note 1: All voltages are with respect to ground, Pins 4,
5, 12, 13. Currents are positive into, negative out of the
specified terminal. Pin numbers refer to DIL-16 pack-
age.
Consult Packaging Section of Databook for thermal limi-
tations and considerations of package.
