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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 25C, 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 = 25C
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 .................................. -20C to +85C Storage Temperature Range, TS ................................ -55C to +150C
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
RJT = 6.0C/W
4
3
SUFFIX 'B', R JA = 43C/W
2
1
SUFFIX 'LB', R JA = 60C/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 (c) 1986, 1996 Allegro MicroSystems, Inc.
2540 QUAD DARLINGTON POWER DRIVER
ELECTRICAL CHARACTERISTICS at TA = 25C, TJ 150C, 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 <1.0 2.0 1.6 2.0 100 mA V V A Min. -- -- 50 -- -- -- 2.4 -- -- -- -- Typ. <1.0 <1.0 -- 0.9 1.0 1.3 -- -- -- -- 14 Max. 100 100 -- 1.0 1.2 1.6 -- 0.8 10 -100 20 Units A A V V V V V V A A mA
Typical Data is for design information only. Negative current is defined as coming out of (sourcing) the specified terminal. As used here, -100 is defined as greater than +10 (absolute magnitude convention) and the minimum is implicitly zero. *All inputs simultaneously, all other tests are performed with each input tested separately.
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2540 QUAD DARLINGTON POWER DRIVER
TYPICAL APPLICATION
(QUAD RELAY DRIVER WITH ZENER FLYBACK)
+28 V 1 2 3 4 K2 15V 5 6 7 8 16 15 14 13 12 11 10 9 +5V IN 2 IN 1
Dwg. EP-016
K4 K3
IN 4 IN 3 ENABLE
K1
APPLICATIONS INFORMATION
A typical application is shown for driving four high-current relays, solenoids, or print heads. A Zener diode is used to increase the flyback voltage, providing a much faster inductive load turn-off current decay, resulting in faster dropout (reduced relay contact arcing), and improved performance. The maximum Zener voltage, plus the load supply voltage, plus the flyback diode forward voltage must not exceed the device's rated sustaining voltage. With external control circuitry, the ENABLE input can be used for chopper (PWM) applications. If the ENABLE input is not used, it should be tied high. All inputs will float high if open circuited.
VCC + VZ + V F
OUTPUT VOLTAGE
V CC
V CC + V F
V CE(SAT) I OUT ZENER CLAMP DIODE CLAMP
OUTPUT CURRENT
I CEX
Dwg. WP-001
115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000
2540 QUAD DARLINGTON POWER DRIVER
UDN2540B
Dimensions in Inches (controlling dimensions)
0.020 0.008
16
NOTE 4
9
0.430 0.280 0.240
MAX
0.300
BSC
1 0.070 0.045
0.100 0.775 0.735
BSC
8 0.005
MIN
0.210
MAX
0.015
MIN
0.150 0.115 0.022 0.014
Dwg. MA-001-17A in
Dimensions in Millimeters (for reference only)
16
NOTE 4
9
0.508 0.204
10.92 7.11 6.10
MAX
7.62
BSC
1 1.77 1.15
2.54 19.68 18.67
BSC
8 0.13
MIN
5.33
MAX
0.39
MIN
3.81 2.93 0.558 0.356
Dwg. MA-001-17A mm
NOTES: 1. Leads 1, 8, 9, and 16 may be half leads at vendor's option. 2. Lead thickness is measured at seating plane or below. 3. Lead spacing tolerance is non-cumulative. 4. Webbed lead frame. Leads indicated are internally one piece. 5. Exact body and lead configuration at vendor's option within limits shown.
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2540 QUAD DARLINGTON POWER DRIVER
A2540SLB
Dimensions in Inches (for reference only)
20 11 0.0125 0.0091
0.2992 0.2914
0.419 0.394
0.050 0.016 0.020 0.013 1 2 3 0.5118 0.4961 0.050
BSC NOTE 1 NOTE 3
0 TO 8
0.0926 0.1043 0.0040 MIN.
Dwg. MA-008-21A in
Dimensions in Millimeters (controlling dimensions)
20 11 0.32 0.23
7.60 7.40
10.65 10.00
1.27 0.40 0.51 0.33 1 2 3 13.00 12.60 1.27
BSC NOTE 1 NOTE 3
0 TO 8
2.65 2.35 0.10 MIN.
Dwg. MA-008-21A mm
NOTES: 1. Webbed lead frame. Leads 5, 6, 15, and 16 are internally one piece. 2. Lead spacing tolerance is non-cumulative. 3. Exact body and lead configuration at vendor's option within limits shown.
115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000
2540 QUAD DARLINGTON POWER DRIVER
The products described here are manufactured under one or more U.S. patents or U.S. patents pending. Allegro MicroSystems, Inc. reserves the right to make, from time to time, such departures from the detail specifications as may be required to permit improvements in the performance, reliability, or manufacturability of its products. Before placing an order, the user is cautioned to verify that the information being relied upon is current. Allegro products are not authorized for use as critical components in life-support devices or systems without express written approval. The information included herein is believed to be accurate and reliable. However, Allegro MicroSystems, Inc. assumes no responsibility for its use; nor for any infringement of patents or other rights of third parties which may result from its use.
www.allegromicro.com
2540 QUAD DARLINGTON POWER DRIVER
POWER SINK DRIVERS
IN ORDER OF 1) OUTPUT CURRENT, 2) OUTPUT VOLTAGE, 3) NUMBER OF DRIVERS
Output Ratings * mA
75
V
#
Serial Input
Latched Drivers
Features Diode Clamp
Outputs
Internal Protection
Part Number
17 8 X X - constant current - 6275 17 16 X X - constant current - 6276 100 20 8 - - - saturated - 2595 30 32 X X - - - 5833 40 32 X X - saturated - 5832 50 8 addressable decoder/driver DMOS - 6B259 50 8 - X - DMOS - 6B273 50 8 X X - DMOS - 6B595 250 50 8 addressable decoder/driver DMOS - 6259 50 8 - X - DMOS - 6273 50 8 X X - DMOS - 6595 135 7 - - X - - 7003 300 45 1 - Hall sensor/driver X - X 5140 50 7 - - X - - 2003 50 8 - - X - - 2803 50 8 - - X saturated - 2596 60 4 - - X saturated X 2557 95 7 - - X - - 2023 95 8 - - X - - 2823 350 50 4 - X X - - 5800 50 7 - - X - - 2004 50 8 - - X - - 2804 50 8 - X X - - 5801 50 8 X X - - - 5821 50 8 X X X - - 5841 50 8 addressable decoder/driver DMOS - 6A259 50 8 X X - DMOS - 6A595 80 8 X X - - - 5822 80 8 X X X - - 5842 95 7 - - X - - 2024 95 8 - - X - - 2824 450 30 28 dual 4- to 14-line decoder/driver - - 6817 600 60 4 - - - saturated X 2547 60 4 - - X saturated X 2549 700 60 4 - - X saturated X 2543 and 2559 750 50 8 - - X saturated - 2597 900 14 2 - Hall sensor/driver X saturated X 3625 26 2 - Hall sensor/driver X saturated X 3626 1000 46 4 stepper motor controller/driver MOS - 7024 and 7029 1200 46 4 microstepping controller/driver MOS - 7042 1250 50 4 stepper motor translator/driver - X 5804 50 4 - - X - - 2064 and 2068 1500 80 4 - - X - - 2065 and 2069 1800 50 4 - - X - - 2544 50 4 - - X - - 2540 3000 46 4 stepper motor controller/driver MOS - 7026 46 4 microstepping controller/driver MOS - 7044 4000 50 4 - - X - - 2878 80 4 - - X - - 2879 * Current is maximum specified test condition, voltage is maximum rating. See specification for sustaining voltage limits or over-current protection voltage limits. Complete part number includes additional characters to indicate operating temperature range and package style.
115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000

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