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| 2998 DUAL FULL-BRIDGE MOTOR DRIVER As an interface between low-level logic and solenoids, dc (brush) motors, or stepper motors, the UDN2998W dual full-bridge driver will operate inductive loads up to 50 V with continuous output currents of up to 2 A per bridge or peak (start-up) currents to 3 A. The control inputs are compatible with TTL, DTL, and 5 V CMOS logic. Except for a common supply voltage and thermal shutdown, the two drivers in each package are completely independent. For external PWM control, an Output Enable for each bridge circuit is provided and the sink driver emitters are pinned out for connection to external current-sensing resistors. The chopper drive mode is characterized by low power dissipation levels and maximum efficiency. A PHASE input to each bridge determines load-current direction. Extensive circuit protection is provided on-chip. Both groundclamp and flyback diodes for each bridge are provided. A thermal shutdown circuit disables the load drive if chip temperature rating (package power dissipation) is exceeded. Internally-generated delays provide crossover-current protection. The UDN2998W is packaged in a 12-pin single in-line power-tab package for high power capabilities. Driving either of the bridges at the full 2 A dc rating requires the use of an external heat sink. The tab is at ground potential and needs no insulation. Data Sheet 29319.6B Dwg. No. W-106 ABSOLUTE MAXIMUM RATINGS at TJ +150C Supply Voltage, VBB .......................... 50 V Output Current, IOUT (continuous) ..... 2 A (peak) ........................................... 3 A Sink Driver Emitter Voltage, VE ...... 1.5 V Logic Input Voltage Range, VPHASE or VENABLE ....... -0.3 V to 15 V Package Power Dissipation, PD ....................................... See Graph Operating Temperature Range, TA .............................. -20C to +85C Storage Temperature Range, TS ............................. -55C to +150C NOTE: Output current rating may be limited by chopping frequency, ambient temperature, air flow, or heat sinking. Under any set of conditions, do not exceed the specified current rating or a junction temperature of +150C. FEATURES I I I I I I I I 3 A Peak Output Current Output Voltage to 50 V Integral Output Suppression Diodes Output Current Sensing TTL/CMOS Compatible Inputs Internal Thermal Shutdown Circuitry Crossover-Current Protected Automotive Capable Always order by complete part number: UDN2998W . 2998 DUAL FULL-BRIDGE MOTOR DRIVER FUNCTIONAL BLOCK DIAGRAM (ONE OF TWO DRIVERS) BB Dwg. No. W-107A To maintain isolation between integrated circuit components and to provide for normal transistor operation, the ground tab must be connected to the most negative point in the external circuit. 10 ALLOWABLE PACKAGE POWER DISSIPATION IN WATTS RJT = 2.0C/W TRUTH TABLE ENABLE INPUT Low Low High High PHASE INPUT High Low High Low OUTPUT 1 High Low Open Low OUTPUT 2 Low High Low Open 8 3.0C/W HEAT SINK RJA = 5.0C/W 6 12C/W HEAT SINK RJA = 14C/W 4 2 FREE AIR, R JA = 38C/W 0 25 50 75 100 TEMPERATURE IN C 125 150 Dwg. GP-012B 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright (c) 1985, 2000 Allegro MicroSystems, Inc. 2998 DUAL FULL-BRIDGE MOTOR DRIVER ELECTRICAL CHARACTERISTICS at TA = +25C, TJ +150C, VBB = 50 V Limits Characteristic Output Drivers Operating Voltage Range Output Leakage Current VBB ICEX VOUT = 50 V, VENABLE = 2.0 V, Note 2 VOUT = 0, VENABLE = 2.0 V, Note 2 Output Saturation Voltage VCE(SAT) IOUT = 1 A, Sink Driver IOUT = 2 A, Sink Driver IOUT = -1 A, Source Driver IOUT = -2 A, Source Driver Output Sustaining Voltage Source Driver Rise Time Source Driver Fall Time Deadtime Clamp Diode Leakage Current Clamp Diode Forward Voltage Supply Current Control Logic (PHASE or ENABLE) Logic lnput Voltage VIN(0) VIN(1) Logic Input Current IIN(0) IIN(1) Turn-On Delay Time Turn-Off Delay Time tpd0 tpd1 VPHASE or VENABLE = 0.8 V VPHASE or VENABLE = 2.0 V ENABLE Input to Source Drivers ENABLE Input to Source Drivers -- 2.0 -- -- -- -- -- -- -5.0 <1.0 0.4 2.0 0.8 -- -25 10 1.0 4.0 V V A A s s VCE(sus) tr tf td IR VF IBB IOUT = 2 A, L = 3.5 mH, Note 2 IOUT = -2 A IOUT = -2 A IOUT = 2 A VR = 50 V IF = 2 A VENABLE(1) = VENABLE(2) = 0.8 V 10 -- -- -- -- -- -- 50 -- -- -- -- -- -- -- <5.0 <-5.0 1.2 1.7 1.7 2.0 -- 500 750 2.5 <5.0 1.5 30 50 50 -50 1.4 1.9 1.9 2.2 -- -- -- -- 50 2.0 35 V A A V V V V V ns ns s A V mA Symbol Test Conditions Min. Typ. Max. Units NOTES:1. Each driver is tested separately. 2. Test is performed with VPHASE = 0.8 V and then repeated for VPHASE = 2.0 V. 3. Negative current is defined as coming out of (sourcing) the specified device pin. www.allegromicro.com 2998 DUAL FULL-BRIDGE MOTOR DRIVER V ENABLE VPHASE + I OUT - t pd t pd 90% 0% td t r tf t d 90% Dwg. WM-001 Dwg. WM-001 TYPICAL APPLICATION 2-PHASE BIPOLAR STEPPER MOTOR DRIVE (Chopper Mode) +5V INPUT A 0 +5V INPUT B 0 Dwg. No. A-12,454 Dwg. EP-025 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 2998 DUAL FULL-BRIDGE MOTOR DRIVER Dimensions in Inches (controlling dimensions) 1.260 1.240 0.020 0.775 0.765 0.245 0.225 0.180 MAX 0.055 0.045 0.155 o 0.145 0.135 0.100 0.140 0.365 0.570 0.540 INDEX AREA 0.290 MIN 1 0.065 0.035 0.030 0.020 12 0.100 0.010 0.023 0.018 0.080 0.070 Dwg. MP-007 in NOTES: 1. 2. 3. 4. 5. Lead thickness is measured at seating plane or below. Lead spacing tolerance is non-cumulative. Exact body and lead configuration at vendor's option within limits shown. Lead gauge plane is 0.030" below seating plane. Supplied in standard sticks/tubes of 15 devices. www.allegromicro.com 2998 DUAL FULL-BRIDGE MOTOR DRIVER Dimensions in Millimeters (for reference only) 32.00 31.49 0.51 19.69 19.45 6.22 5.71 4.57 MAX 1.40 1.14 3.94 o 3.68 3.43 2.54 3.56 9.27 14.48 13.71 INDEX AREA 7.36 MIN 1 1.65 0.89 0.76 0.51 12 2.54 0.254 0.59 0.45 2.03 1.77 Dwg. MP-007 mm NOTES: 1. 2. 3. 4. 5. 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. Lead thickness is measured at seating plane or below. Lead spacing tolerance is non-cumulative. Exact body and lead configuration at vendor's option within limits shown. Lead gauge plane is 0.762 mm below seating plane. Supplied in standard sticks/tubes of 15 devices. 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 |
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