2919

Packaging : Bulk
Lamp Size : T - 3 1/4


Features:

  750 mA Continuous Output Current
  45 V Output Sustaining Voltage
  Internal Clamp Diodes
  Internal PWM Current Control
  Low Output Saturation Voltage
  Internal Thermal Shutdown Circuitry
  Half- or Quarter-Step Operation of Bipolar Stepper Motors


Pinout




Specifications

               at TJ 150°C
Motor Supply Voltage, V_BB ...................  45 V
Output Current, I OUT
        (Peak, t_w 20 µs) ........................  ±1.0 A
        (Continuous) ..........................  ±750 mA
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 ..................  1.5 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 A2919SB and A2919SLB motor drivers are 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 modulation (PWM) control of the output current to 750 mA.  The outputs have been optimized for a low output-saturation voltage drop (less than 1.8 V total source plus sink at 500 mA).

For PWM current control, the maximum output current is deter-mined by the user's selection of a reference voltage and sensing resistor.  Two logic-level inputs select output current limits of 0%, 41%,67%, or 100% of the maximum level.  A PHASE input to each bridge determines load current direction.

The 2919 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 temperature exceeds safe operating limits.

The A2919SB is supplied in a 24-pin dual in-line plastic batwing package with a copper lead-frame and heat sinkable tabs for improved power dissipation capabilities.  The A2919SLB is supplied in a 24-lead surface-mountable SOIC.  Their batwing construction provides for maximum package power dissipation in the smallest possible construc-tion.  The A2919SB/SLB are available for operation from -40°C to+85°C.  To order, change the suffix from 'S' to 'E'.  2919 are also available on special order for operation to +125°C.  For
applications not requiring quarter-step operation, but desire lower detent or running current, the similar UDN2916B/EB/LB may be pre-ferred.


Parameters:

Technical/Catalog Information	2919
Vendor	JKL Components Corp.
Category	Optoelectronics
Accessory Type	LED or Lamps - Socket with Contacts
For Use With/Related Products	T-3 1/4 Wedge Based Lamps
Lead Free Status	Lead Free
RoHS Status	RoHS Compliant
Other Names	2919 2919