Combining logic gates high-current bipolar outputs, UDN2544B quad Darl

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Combining logic gates high-current bipolar outputs, UDN2544B quad Darl

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QUAD DARLINGTON POWER DRIVER
Combining logic gates high-current bipolar outputs, UDN2544B quad Darlington power driver provides interface between low-level logic circuitry high-power loads. Each four outputs sink state with peak inrush currents four power outputs each comprised opencollector Darlington driver internal flyback/clamp diode switching inductive loads. They feature minimum breakdown sustaining voltage logic inputs compatible with CMOS logic systems. This device particularly well-suited unipolar stepper motor drive applications. With complementary control inputs activelow ENABLE, UDN2544B makes easy implement full stepping stepper motor with only microcontroller/microprocessor control lines. Other typical applications include relay solenoid driving incandescent lamp driving. UDN2544B supplied 16-pin batwing power DIP. batwing construction provides maximum package power dissipation standard construction. 25°C, with only copper foil ground tabs, package capable safely dissipating
Data Sheet 29317.6
OUT4 OUT3 GROUND GROUND OUT2 OUT1
ENABLE GROUND GROUND
ABSOLUTE MAXIMUM RATINGS 25°C
Output Voltage, VOUT Output Current, IOUT (Peak) (Continuous) Logic Supply Voltage, Input Voltage, Package Power Dissipation, Graph Operating Temperature Range, -20°C +85°C Storage Temperature Range, -55°C +150°C
Dwg. PP-017A
FEATURES
Continuous Output Current Output Voltage
Inputs Configured Unipolar Stepper Motors Active-Low Output Enable
CMOS Compatible Inputs Integral Transient-Suppression Diodes
Always order complete part number:
UDN2544B
2544 QUAD DARLINGTON POWER DRIVER
ELECTRICAL CHARACTERISTICS +25°C, 150°C, 4.75 5.25
Limits Characteristic Output Leakage Current Output Sustaining Voltage Output Saturation Voltage Symbol ICEX VCE(sus) VCE(SAT) Test Conditions VOUT IOUT IOUT IOUT IOUT Input Voltage Logic Logic Input Current Logic Logic Total Supply Current VIN(1) VEN(1) VIN(0) VEN(0) VIN(1) VEN(1) VIN(0) VEN(0) Outputs Outputs Open Outputs Clamp Diode Forward Voltage Clamp Diode Leakage Current Min. Typ. <1.0 Max. -100 Units
Typical Data design information only. Negative current defined coming (sourcing) specified terminal. used here, -100 defined greater than (absolute magnitude convention) minimum implicitly zero.
TRUTH TABLE
ALLOWABLE PACKAGE POWER DISSIPATION WATTS
ENABLE
OUT1
OUT2
OUT3
OUT4
6.0°C/W
Don't care
43°C/W
TEMPERATURE
Dwg. GP-010B
Northeast Cutoff, 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright 1989, 2001 Allegro MicroSystems, Inc.
2544 QUAD DARLINGTON POWER DRIVER
(UNIPOLAR STEPPER MOTOR WITH ZENER FLYBACK)
TYPICAL APPLICATION
Dwg. EP-015
TRUTH TABLE
INPUTS WINDINGS
APPLICATIONS INFORMATION
typical application shown driving four-phase unipolar stepper motor. Note that with complimentary control inputs, only logic signals needed drive motor two-phase format. phase drive format illustrated, energizes adjacent phases each detent position (AB, provide improved torque-speed product greater detent torque. Zener diode used increase flyback voltage. increased flyback voltage gives much faster inductive load turn-OFF current decay resulting improved motor performance. maximum Zener voltage, plus load supply voltage, plus flyback diode forward voltage must exceed device's rated sustaining voltage.
OUTPUT VOLTAGE
With external control circuitry, ENABLE input (active low) used chopper (PWM) applications. ENABLE input used, should tied low. inputs will float high open circuited.
VOUT(SAT) ZENER CLAMP DIODE CLAMP
Dwg. WP-001
Allegro MicroSystems, Inc. reserves right make, from time time, such departures from detail specifications required permit improvements design products. information included herein believed accurate reliable. However, Allegro MicroSystems, Inc. assumes responsibility use; infringements patents other rights third parties which result from use.
OUTPUT CURRENT
2544 QUAD DARLINGTON POWER DRIVER
Dimensions Inches
(controlling dimensions)
0.020 0.008
NOTE
0.430 0.280 0.240
0.300
0.070 0.045
0.100 0.775 0.735
0.005
0.210
0.015
0.150 0.115 0.022 0.014
Dwg. MA-001-17A
Dimensions Millimeters
(for reference only)
NOTE
0.508 0.204
10.92 7.11 6.10
7.62
1.77 1.15
2.54 19.68 18.67
0.13
5.33
0.39
3.81 2.93 0.558 0.356
Dwg. MA-001-17A
NOTES: Leads half leads vendor's option. Lead thickness measured seating plane below. Lead spacing tolerance non-cumulative. Webbed lead frame. Leads indicated internally piece. Exact body lead configuration vendor's option within limits shown.
Northeast Cutoff, 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000

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