UDN2916LB-T

DUAL FULL-BRIDGE PWM MOTOR DRIVER

The UDN2916B, UDN2916EB, and UDN2916LB 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 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.

The 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 UDN2916B 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 UDN2916EB is supplied in a 44-lead

power PLCC for surface mount applications.  The UDN2916LB is

supplied in a 24-lead surface-mountable SOIC.  Their batwing construction provides for maximum package power dissipation in the smallest

possible construction.  The UDN2916B/EB/LB are available for operation from -40°C to +85°C.  To order, change the prefix from 'UDN' to

'UDQ'.  These devices are also available on special order for operation

to +105°C. The LB package is available in a lead-free version (100%

matte tin leadframe).

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

Similar to Dual PBL3717, UC3770