UDS2998V

The UDS2998V has the following features including ±1.8 A Output Current;Output Voltage to 50 V;Integral Output Suppression Diodes;Output Current Sensing;Logic Compatible Inputs;Internal Thermal Shutdown Circuitry;Crossover-Current Protected;Hermetically Sealed Package;High-Reliability Screening.

The UDS2998V dual full-bridge driver is designed for bidirectional operation of 2-phase stepper motors, a pair of do seivo motors,2-phase brushless do motors, or two solenoids at up to:50. V with continuous output currents to 11.8 A per bridge or peak (start-up) currents to +2.2 A. The control inputs ate compatible with standard logic families. Except for a common supply. voltage and thermal shut-down, the two drivers in a device are completely independent.Static burn-in and 100% high-realiability screening t0 MIL-STD-883,Class B are standard.For external PWM control, an OUTPUT ENABLE for each bridge circuit is provided and the sink driver emitters are brought out for connection to external current-sensing resistors. A PHASE input to each brigge determines load-current direction.

The UDS2953V full-bridge driver is ideal fordriving 2-phase bipolar stepper, bidirectional do servo, and brushless do motors with various pulse-width modulation (PWM) current-control formats, Output current is controlled by,using an external sense resistor and an optionaL.RC nerwork and reference voltage for an internal fixed-frequency PWM circuit, or by using an external PWM source.Average load current can also be adjusted:by external pulse-width modulation using the OUTPUT ENABLE pin.Toggling fhe OUTPUT ENABLE line shuts OFF both the source and sink drivers.Extensive circuit protection is provided on-chip. Output suppression diodes protect the bridges from the transients generated when switch-ing inductive loads. A thermal shutdown circuit disables all of the source drivers if chip temperature rating (package power dissipation) iS exceeded. Internal oelays proviae protection against-crossover currents (adjacent source and sink drivers conducting simultaneously) during switching intervals.The UDS2998V is supplied in a 15-pin, flange-mount MO-097AA style hermetic pacKage for improved power dissipauon capabilities. An external neatsink is required for high-current appncatipns.The flange is at ground potential and normally needs no isolation.