QUAD DARLINGTON POWER DRIVER

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1 540 Data Sheet 37C OUT 4 K OUT 3 UDN540B IN 4 IN 3 ENABLE Combining AND logic gates and inverting high-current bipolar outputs, the UDN540B and A540SLB 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. A in the ON state with peak inrush currents to.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. OUT K OUT V CC IN IN Dwg. PP-07- 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 UDN544B. The UDN540B is supplied in a 6-pin batwing power DIP; the A540SLB is supplied in a 0-lead batwing power SOIC for surfacemount applications. The batwing construction provides for maximum package power dissipation in a standard construction. At 5 C, and with only sq. in. of copper foil at the ground tabs, either package is capable of safely dissipating more than W. FEATURES ABSOLUTE MAXIMUM RATINGS at T A = 5 C Output Voltage, V OUT V Output Current, I OUT (peak)....5 A (continuous).... A Logic Supply Voltage, V CC V Input Voltage, V IN V Package Power Dissipation, P D... See Graph Operating Temperature Range, T A C to +5 C Storage Temperature Range, T S C to +50 C. 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 L6A and L6CD Always order by complete part number: Part Number Package UDN540B 6-pin batwing DIP A540SLB 0-lead batwing SOIC

2 A540SLB OUT 4 K NO CONNECTION OUT 3 OUT NO CONNECTION K OUT NC NC NC V CC NC IN 4 IN 3 NO CONNECTION ENABLE SUPPLY NO CONNECTION IN IN ALLOWABLE PACKAGE POWER DISSIPATION IN WATTS R = 6.0 C/W θjt SUFFIX 'B', R = 43 C/W θja SUFFIX 'LB', R θja = 60 C/W TEMPERATURE IN C Dwg. PP-07-3 Dwg. GP-04-3 TRUTH TABLE ENABLE IN N OUT N H H ON L OFF L X OFF X = Don t care. 5 Northeast Cutoff, Box 5036 Worcester, Massachusetts (50) Copyright 6, 6 Allegro MicroSystems, Inc.

3 ELECTRICAL CHARACTERISTICS at T A = 5 C, T J 50 C, V CC = 4.75 V to 5.5 V. Limits Characteristic Symbol Test Conditions Min. Typ. Max. Units Output Leakage Current I CEX V OUT = 50 V, V IN = 0. V, V EN =.4 V <.0 00 µa V OUT = 50 V, V IN =.4 V, V EN = 0. V <.0 00 µa Output Sustaining Voltage V CE(sus) I OUT =. A, L = 3.0 mh 50 V Output Saturation Voltage V CE(SAT) I OUT = 600 ma, V IN = V EN =.4 V 0..0 V I OUT =.0 A, V IN = V EN =.4 V.0. V I OUT =. A, V IN = V EN =.4 V.3.6 V Input Voltage Logic V IN() or V EN().4 V Logic 0 V ln(0) or V EN(0) 0. V Input Current Logic V IN() or V EN() =.4 V 0 µa Logic 0 V ln(0) or V EN(0) = 0. V -00 µa Total Supply Current I CC V IN * = V EN =.4 V, V CC = 5.0 V, 4 0 ma Outputs Open V IN * = V EN = 0. V, V CC = 5.0 V ma Clamp Diode Forward Voltage V F I F =.0 A.3.6 V I F =. A.6.0 V Clamp Diode Leakage Current I R V R = 50 V <.0 00 µa Typical Data is for design information only. *All inputs simultaneously, all other tests are performed with each input tested separately.

4 TYPICAL APPLICATION (QUAD RELAY DRIVER WITH ZENER FLYBACK) + V K4 K IN 4 IN 3 ENABLE 4 3 K 5V V IN K IN Dwg. EP-06 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. V CC + V Z + VF V CC V CC + VF OUTPUT VOLTAGE V CE(SAT) I OUT ZENER CLAMP OUTPUT CURRENT DIODE CLAMP I CEX Dwg. WP-00 5 Northeast Cutoff, Box 5036 Worcester, Massachusetts (50)

5 6 UDN540B Dimensions in Inches (controlling dimensions) NOTE MAX MIN 0.0 MAX 0.05 MIN Dimensions in Millimeters (for reference only) Dwg. MA-00-7A in 6 NOTE MAX MIN 5.33 MAX 0.3 MIN 3..3 NOTES: Leads,,, and 6 may be half leads at vendor s option.. 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. Dwg. MA-00-7A mm

6 A540SLB Dimensions in Inches (for reference only) NOTE NOTE 3 0 TO MIN. 0 Dimensions in Millimeters (controlling dimensions) Dwg. MA-00-A in NOTE NOTE 3 0 TO MIN. Dwg. MA-00-A mm NOTES:. Webbed lead frame. Leads 5, 6, 5, and 6 are internally one piece.. Lead spacing tolerance is non-cumulative. 3. Exact body and lead configuration at vendor s option within limits shown. 5 Northeast Cutoff, Box 5036 Worcester, Massachusetts (50)

7 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 design of its products. The information included herein is believed to be accurate and reliable. However, Allegro MicroSystems, Inc. assumes no responsibility for its use; nor for any infringements of patents or other rights of third parties which may result from its use.

8 IN ORDER OF ) OUTPUT CURRENT, ) OUTPUT VOLTAGE, 3) NUMBER OF DRIVERS POWER SINK DRIVERS SELECTION GUIDE Output Ratings * Features Serial Latched Diode Saturated Internal ma V # Input Drivers Clamp Outputs Protection Part Number 00 0 X X X X X X X Hall Sensor/Driver X X X X X X Hall Sensor/Driver X X X X X 03 5 X X X X X X X X X 5 0 X X 5 50 X X X 54 0 X X X X 04 5 X Dual 4 to 4-Line Decoder/Driver X X X X X X X X 543 and X X Hall Sensor/Driver X X X Hall Sensor/Driver X X X Stepper Motor Controller/Driver MOS 704 and Microstepping Controller/Driver MOS Stepper Motor Translator/Driver X X 064 and X 065 and X X X X X Stepper Motor Controller/Driver MOS X X 7 * 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. 5 Northeast Cutoff, Box 5036 Worcester, Massachusetts (50)

DISCONTINUED PRODUCT FOR REFERENCE ONLY. QUAD HIGH-CURRENT, HIGH-VOLTAGE SOURCE DRIVER FEATURES

DISCONTINUED PRODUCT FOR REFERENCE ONLY. QUAD HIGH-CURRENT, HIGH-VOLTAGE SOURCE DRIVER FEATURES Data Sheet 29309.10 2944 V S Capable of driving loads to 4 A at supply voltages to 60 V (inductive loads to 35 V), the UDN2944W is a quad high-current, highvoltage source driver. Each of the four power