2549 Datasheet | Allegro MicroSystems

Description and Applications for further information. PROTECTED QUAD POWER DRIVER Providing improved output current limiting, the UDK/UDN/ UDQ2549B and UDK/UDN/UDQ2549EB quad power drivers bine AND logic gates and high-current bipolar outputs with plete output protection. Each of the four outputs will sink 600 m A in the on state. The outputs have a minimum breakdown voltage (load dump) of 60 V and a sustaining voltage of 40 V. The inputs are patible with TTL and 5 V CMOS logic systems. Over-current protection for each channel has been designed into these devices and is activated at approximately 1 A. It protects each output from short circuits with supply voltages up to 25 V. When an output current trip point is reached, that output stage is driven linearly resulting in a reduced output current level. If an over-current or short circuit condition continues, the thermal limiting circuits will first sense the rise in junction temperature and then the rise in chip temperature, further decreasing the output current. Under worst-case conditions, the six devices in this family will tolerate short-circuits on all outputs, simultaneously. These devices can be used to drive various loads including incandescent lamps (without warming or limiting resistors) or inductive loads such as relays, solenoids, or dc stepping motors. The suffix ‘B’ devices are 16-pin power DIPs while the suffix ‘EB’ devices are 28-lead power PLCCs for surface-mount applications. Both packages are of batwing construction to provide for maximum package power dissipation. FEATURES I 600 m A Output Current per Channel I Independent Over-Current Protection for Each Driver I Thermal Protection for Device and Each Driver I Low Output-Saturation Voltage I Integral Output Flyback Diodes I TTL and 5 V CMOS patible Inputs I Pin-patible With UDN2543B/EB Always order by plete part number: a prefix to indicate operating temperature range + the basic four-digit part number + a suffix to indicate package style, e.g.,...