DISCONTINUED PRODUCT FOR REFERENCE ONLY

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1 23 Data Sheet 23.5A LOAD SUPPLY A PHASEA OUTA OUT 2A V EA UDN23B VBB V DD SUPPLY B 4 PHASE B OUT B OUT 2B V EB Dwg. No. A-2,455 ABSOLUTE MAXIMUM RATINGS at T J +50 C Load Supply Voltage, V BB V Logic Supply Voltage, V DD V Logic Input Voltage Range, V PHASE or V V to V DD V Output Current, I OUT... ±600 ma Sink Driver Emitter Voltage, V E....5 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 Cost-effective monolithic drive electronics for bipolar stepper and dc (brush) servo motors to 30 V and 500 ma is very practical with the UDN23B and UDN23LB. These dual full-bridge motion control ICs integrate separate inputs, level shifting for upper power outputs, control logic, integral inductive transient protection, and source (upper) and sink (lower) drivers in an H-bridge configuration. The single-chip power IC provides improved space utilization and reliability unmatched by discrete component circuitry. Excepting the power supply connections, the two H-bridges are independent. An input is provided for each bridge and permits pulse-width modulation (PWM) through the use of external circuitry. PWM drive techniques provide the benefits of reduced power dissipation, improved motor performance (especially torque), and positively affect system efficiency. Separate PHASE inputs for each bridge determine the direction of current flow in the load. Additionally, each pair of (sink) emitters are terminated to package connections. This allows the use of current-sensing circuitry. Both devices incorporate an intrinsic dead time to preclude high crossover (or cross-conduction) currents during changes in direction (phase). These devices are packaged in plastic DIPs (suffix B) or surfacemountable wide-body SOICs (suffix LB) with copper lead frames for optimum power dissipation without heat sinks. The lead configurations allow automatic insertion, fit standard IC sockets or printed wiring board layouts, and enable easy attachment of a heat sink for maximum power-handling capability. The heat-sink tabs are at ground potential and require no insulation. Dual full-bridge drivers with peak current ratings of ±3 A are supplied as the UDN2W. FEATURES ±600 ma Output Current Output Voltage to 30 V Crossover Current Protection TTL/NMOS/CMOS Compatible Inputs Low Input Current Internal Clamp Diodes Automotive Capable Always order by complete part number: Part Number Package UDN23B -Pin DIP UDN23LB 20-Lead Wide-Body SOIC DISCONTINUED PRODUCT FOR REFERENCE ONLY IMPORTANT: Load supply voltage must never be applied without logic supply voltage present. NOTE: Output current rating may be limited by chopping frequency, ambient temperature, airflow, and heat sinking. Under any set of conditions, do not exceed the specified maximum current and a junction temperature of +50 C.

2 UDN23LB FUNCTIONAL BLOCK DIAGRAM (One of Two Drivers) LOAD SUPPLY A PHASE A 2 3 V BB V DD 20 SUPPLY B PHASEB V DD V BB OUTA OUTB PHASE OUT OUT 2 OUT2A VEA 2 0 OUT2B VEB V E Dwg. No. A-4,340 Dwg. No. A-2,447 TRUTH TABLE Enable Phase Input Input Output Output 2 High High Low High High Low High Low Low High Low Open Low Low Open Low 25 ALLOWABLE PACKAGE POWER DISSIPATION IN WATTS 20 5 SUFFIX 'LB', R θjt = 6.0 C/W 0 SUFFIX 'B', R = 3 C/W θjt 5 SUFFIX 'B', R θja = 40 C/W SUFFIX 'LB', R θja = 6 C/W TEMPERATURE IN C Dwg. GP-02A V VPHASE IOUT + _ t f t t d r t f t d t r Dwg. No. A-2,44 5 Northeast Cutoff, Box 5036 Worcester, Massachusetts (50) Copyright 5, 3, Allegro MicroSystems, Inc.

3 ELECTRICAL CHARACTERISTICS at T A = +25 C, V BB = 30 V, V DD = 5 V, V E = 0 V, T J +50 C Figure (unless otherwise noted). Limits Characteristic Symbol Test Conditions Min. Typ. Max. Units Output Drivers Operating Voltage Range V BB 0 30 V Output Leakage Current I CEX V = 0. V, V OUT = V BB, Note 2 <.0 50 µa V = 0. V, V OUT = 0 V, Note 2 < µa Output Saturation Voltage V CE(SAT) V = 2.4 V, I OUT = 500 ma.6. V V = 2.4 V, I OUT = -500 ma V Output Sustaining Voltage V CE(sus) I OUT = ±500 ma, Figure 2, Note 2 30 V Motor Supply Current I BB(ON) V = 2.4 V, Outputs Open, Note ma I BB(OFF) V = 0. V, Outputs Open, Note µa Source Driver Rise Time t r I OUT = -500 ma 75 ns Source Driver Fall Time t f I OUT = -500 ma 20 ns Clamp Diode Forward Voltage V F I F = 500 ma.6. V Control Logic (PHASE or ) Logic Input Current I IN() V PHASE or V = 2.4 V <.0 0 µa I IN(0) V PHASE or V = 0. V µa Logic Input Voltage V IN() 2.4 V V IN(0) 0. V Logic Supply Current I DD 4 20 ma Turn-On Delay Time t pd0 Input to Source Drivers 250 ns Turn-Off Delay Time t pd lnput to Source Drivers 500 ns NOTES:. Each driver is tested separately. 2. Test is performed with V PHASE = 0. V and then repeated for V PHASE = 2.4 V. 3. Negative current is defined as coming out of (sourcing) the specified device pin.

4 TEST FIGURES FIGURE VDD = 5V VBB = 40V OUT I OUT ma OUT2 PHASE V E FIGURE 2 VDD = 5V VBB = 40V Dwg. No. A-2,44 TYPICAL APPLICATION 2-PHASE BIPOLAR STEPPER MOTOR DRIVE (Chopper Mode) 2.4V 0.V +5V +36V +5V 2mH PHASE 5.6K 2 IN A 3 4 VBB VDD IN B 5.6K V E 5 2 Dwg. No. A-2,450 6 _ + 7 0K 0. Ω 0 Ω 0K 0. _ K 0K + 5V K 56Ω 0. 0K 470K Dwg. No. A-2,453 +5V INPUT A 0 INPUT B +5V 0 Dwg. No. A-2,454 5 Northeast Cutoff, Box 5036 Worcester, Massachusetts (50)

5 UDN23B Dimensions in Inches NOTE MAX MIN 0.20 MAX 0.05 MIN Dwg. MA-00-7A in Dimensions in Millimeters (Based on = 25.4 mm) NOTE MAX MIN 5.33 MAX 0.3 MIN Dwg. MA-00-7A mm NOTES:. Exact body and lead configuration at vendor s option within limits shown. 2. Lead spacing tolerance is non-cumulative 3. Lead thickness is measured at seating plane or below. 4. Webbed lead frame. Leads 4, 5, 2, and 3 are internally one piece.

6 UDN23LB Dimensions in Inches (Based on mm = ) NOTE NOTE 3 0 TO MIN. Dwg. MA-00-2A in 20 Dimensions in Millimeters NOTE NOTE 3 0 TO MIN. Dwg. MA-00-2A mm NOTES:. Webbed lead frame. Leads 5, 6, 5, and are internally one piece. 2. 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)

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8 SELECTION GUIDE Function Output Ratings * Part Number INTEGRATED CIRCUITS FOR BRUSHLESS DC MOTORS 3-Phase Controller/Drivers ±2.0 A 45 V 236 and Hall-Effect Latched Sensors 0 ma 24 V 375 and Phase Hall-Effect Sensor/Controller 20 ma 25 V 3235 Hall-Effect Complementary Output Sensor 20 ma 25 V Phase Hall-Effect Sensor/Driver 00 ma 4 V Phase Hall-Effect Sensor/Driver 400 ma 26 V 3626 Hall-Effect Comp. Output Sensor/Driver 300 ma 60 V Phase Back-EMF Controller/Driver ±00 ma 4 V 02 A 3-Phase Controller/DMOS Driver ±4.0 A 4 V 25 3-Phase Back-EMF Controller/Driver ±.0 A 7 V 4 INTEGRATED BRIDGE DRIVERS FOR DC AND BIPOLAR STEPPER MOTORS PWM Current Controlled Dual Full Bridge ±750 ma 45 V 2 PWM Current Controlled Dual Full Bridge ±.5 A 45 V 27 PWM Current Controlled Dual Full Bridge ±.5 A 45 V 2 PWM Current Controlled Dual Full Bridge ±750 ma 45 V 2 Dual Full Bridge Driver ±2.0 A 50 V 2 PWM Current Controlled Full Bridge ±2.0 A 50 V 352 PWM Current Controlled Full Bridge ±.3 A 50 V 353 PWM Current Controlled Dual Full Bridge ±00 ma 45 V 36 PWM Current Controlled Dual Full Bridge ±00 ma 30 V 362 OTHER INTEGRATED CIRCUIT & PMCM Unipolar Stepper Motor Quad Driver. A 50 V 2544 Unipolar Stepper-Motor Translator/Driver.25 A 50 V 504 Unipolar Stepper-Motor Quad Driver A 46 V 7024 and 702 Unipolar Microstepper-Motor Quad Driver.2 A 46 V 7042 Voice-Coil Motor Driver ±500 ma 6 V 32-A Voice-Coil Motor Driver ±00 ma V 5 Voice-Coil (and spindle) Motor Driver ±350 ma 7 V 4 * Current is maximum specified test condition, voltage is maximum rating. See specification for sustaining voltage limits or over-current protection voltage limits. Negative current is defined as coming out of (sourcing) the output. Complete part number includes additional characters to indicate operating temperature range and package style. 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. Components made under military approvals will be in accordance with the approval requirements. 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. 5 Northeast Cutoff, Box 5036 Worcester, Massachusetts (50)

QUAD DARLINGTON POWER DRIVER

540 Data Sheet 37C OUT 4 K OUT 3 UDN540B 6 5 3 4 4 3 IN 4 IN 3 ENABLE Combining AND logic gates and inverting high-current bipolar outputs, the UDN540B and A540SLB quad Darlington power drivers provide