2917

Mounting Method :
Size :
Color : Ivory
Material : Polyvinyl Chloride (PVC)
Type : Elbow, Internal


Features:

  1.5 A Continuous Output Current
  45 V Output Sustaining Voltage
  Internal Clamp Diodes
  Digital Control of Output Current
  Internal Thermal Shutdown Circuitry
  Similar to Dual PBL3770


Pinout

Specifications

                       at TJ +150°C
Motor Supply Voltage, V_BB ............................45 V
Output Current, I_OUT (t_w 20 µs) ........ ±1.75 A
        (Continuous) ................................... ±1.5 A
Logic Supply Voltage, V_CC ...........................7.0 V
Logic Input Voltage Range,
        V_IN ..................................... -0.3 V to +7.0 V
Output Emitter Voltage, V_E ..........................1.0 V
Package Power Dissipation,
         P_D .............................................. See Graph
Operating Temperature Range,
        T_A ..................................... -20°C to +85°C
Storage Temperature Range,
        T_S ................................... -55°C to +150°C 


Description

The UDN2917EB motor driver is designed to drive both windings of a bipolar stepper motor or bidirectionally control two dc motors.  Both bridges are capable of sustaining 45 V and include internal pulse-width modula-tion (PWM) control of the output current to 1.5 A.

For PWM current control, the maximum output current is determined by the user's selection of a reference voltage and sensing resistor.  Two logic-level inputs select output current limits of 0, 33%, 67%, or 100% of the maximum level.  A PHASE input to each bridge determines load current direction.  Active- low ENABLE inputs control the four drivers in each bridge.

The 2917 bridges include both ground clamp and flyback diodes for protection against inductive transients.  Internally generated delays prevent cross-over currents when switching current direction.  Special power-up sequencing is not required.  Thermal protection circuitry disables the outputs if the chip tempera-ture exceeds safe operating limits.

The UDN2917EB is supplied in a 44-lead power PLCC for surface-mount applications.  Its batwing construction provides for maximum package power dissipation in the smallest possible construction.  The UDN2917EB is available for operation from -40°C to +85°C.  To order, change the prefix from 'UDN' to 'UDQ'.  This device is also available on special order for operation to +125°C.