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2540 UDN2540B OUT4 K OUT3 GROUND GROUND OUT2 K OUT1 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 IN 4 IN3 ENABLE GROUND GROUND V CC IN 2 IN 1 QUAD DARLINGTON POWER DRIVER Combining AND logic gates and inverting high-current bipolar outputs, the UDN2540B and A2540SLB quad Darlington power drivers provide interface between low-level signal-processing circuits and power loads totaling 360 W. Each of the four independent 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 open-collector Darlington driver and an internal flyback/clamp diode for switching inductive leads. They feature a minimum breakdown and sustaining voltage of 50 V. The logic inputs are compatible with TTL and 5 V CMOS logic systems. Typical applications include print heads, relays, solenoids, and dc stepping motors. These drivers can also be used to drive highcurrent incandescent lamps, LEDS, and heaters. A similar device, specifically intended for driving a unipolar stepper motor in the two-phase drive format, is the UDN2544B. The UDN2540B is supplied in a 16-pin batwing power DIP; the A2540SLB is supplied in a 20-lead batwing power SOIC for surfacemount applications. The batwing construction provides for maximum package power dissipation in a standard construction. At 25°C, and with only 1 sq. in. of copper foil at the ground tabs, either package is capable of safely dissipating more than 2 W. Data Sheet 29317C Dwg. PP-017-2 ABSOLUTE MAXIMUM RATINGS at TA = 25°C 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 FEATURES I I I I I I 1.8 A Continuous Output Current Output Voltage to 50 V TTL and 5 V CMOS Compatible Inputs Efficient Input/Output Pinning Integral Transient-Suppression Diodes Replaces L6221A and L6221CD Always order by complete part number: Part Number Package UDN2540B 16-pin batwing DIP A2540SLB 20-lead batwing SOIC 2540 QUAD DARLINGTON POWER DRIVER A2540SLB OUT4 K NO CONNECTION OUT3 GROUND GROUND OUT 2 NO CONNECTION K OUT1 1 2 3 4 5 6 7 8 9 10 NC V CC NC NC NC 20 19 18 17 16 15 14 13 12 11 IN 4 IN3 NO CONNECTION ENABLE GROUND GROUND SUPPLY NO CONNECTION IN 2 IN 1 ALLOWABLE PACKAGE POWER DISSIPATION IN WATTS 5 RθJT = 6.0°C/W 4 3 SUFFIX 'B', R θJA = 43°C/W 2 1 SUFFIX 'LB', R θJA = 60°C/W 0 25 50 75 100 TEMPERATURE IN °C 125 150 Dwg. GP-049-3 Dwg. PP-017-3 TRUTH TABLE ENABLE H — L X = Don’t care. INN H L X OUTN ON OFF OFF 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright © 1986, 1996 Allegro MicroSystems, Inc. 2540 QUAD DARLINGTON POWER DRIVER ELECTRICAL CHARACTERISTICS at TA = 25°C, TJ ≤ 150°C, VCC = 4.75 V to 5.25 V. Limits Characteristic Output Leakage Current Symbol ICEX Test Conditions VOUT = 50 V, VIN = 0.8 V, VEN = 2.4 V VOUT = 50 V, VIN = 2.4 V, VEN = 0.8 V Output Sustaining Voltage Output Saturation Voltage VCE(sus) VCE(SAT) IOUT = 1.8 A, L = 3.0 mH IOUT = 600 mA, VIN = VEN = 2.4 V IOUT = 1.0 A, VIN = VEN = 2.4 V IOUT = 1.8 A, VIN = VEN = 2.4 V Input Voltage Logic 1 Logic 0 Input Current Logic 1 Logic 0 Total Supply Current ICC VIN(1) or VEN(1) VlN(0) or VEN(0) VIN(1) or VEN(1) = 2.4 V VlN(0) or VEN(0) = 0.8 V VIN* = VEN = 2.4 V, VCC = 5.0 V, Outputs Open VIN* = VEN = 0.8 V, VCC = 5.0 V Clamp Diode Forward Voltage VF IF = 1.0 A IF = 1.8 A Clamp Diode Leakage Current IR VR = 50 V — — — — 0.4 1.3 1.6