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Type
: Material
: Plating
: Thread Size
: Outside Diameter
: Length
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Features:
1.8 A Continuous Output Current Output Voltage to 50 V Inputs Configured for Unipolar Stepper Motors Active-Low Output Enable TTL and 5 V CMOS Compatible Inputs Integral Transient-Suppression Diodes
Pinout
Specifications
Output Voltage, VOUT .............................50 V Output Current, IOUT (Peak) ........................................... 2.5 A (Continuous) ................................. 1.8 A Logic Supply Voltage, VCC .................... 7.0 V Input Voltage, VIN .................................7.0 V Package Power Dissipation, PD ......................................... See Graph Operating Temperature Range, TA .................................. -20°C to +85°C Storage Temperature Range, TS ................................ -55°C to +150°C
Description
Combining logic gates and high-current bipolar outputs, the UDN2544B quad Darlington power driver provides an interface between low-level logic circuitry and high-power loads. Each of the four outputs can sink up to 1.8 A in the on state with peak inrush currents to 2.5 A. The four power outputs are each comprised of an opencollector Darlington driver and an internal flyback/clamp diode for switching inductive loads. They feature a minimum breakdown and sustaining voltage of 50 V. The logic inputs are compatible with TTL and 5 V CMOS logic systems.
UDN2544B is particularly well-suited for unipolar stepper motor drive applications. With complementary control inputs and an activelow ENABLE, the UDN2544B makes it easy to implement full stepping of a stepper motor with only two microcontroller/microprocessor control lines. Other typical applications include relay or solenoid driving and incandescent or LED lamp driving.
The UDN2544B is supplied in a 16-pin batwing power DIP. The batwing construction provides for maximum package power dissipation in a standard DIP construction. At 25°C, and with only 1 sq. in. of copper foil at the ground tabs, the package is capable of safely dissipating 3.8 W.