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| L293B L293E PUSH-PULL FOUR CHANNEL DRIVERS .OUTPUTCURRENT1APERCHANNEL .PEAKOUTPUTCURRENT2APERCHANNEL .I .HI .SEPARATELOGI .OVERTEMPERATUREPROTECTI (non repetitive) NHIBIT FACILITY GH NOISE IMMUNITY C SUPPLY ON DESCRIPTION The L293B and L293E are quad push-pull drivers capableof delivering output currents to 1A per channel. Each channel is controlledby a TTL-compatible logic input and each pair of drivers (a full bridge) is equipped with an inhibit input which turns off all four transistors. A separate supply input is provided for the logic so that it may be run off a lower voltage to reduce dissipation. Additionally, the L293E has external connection of sensing resistors, for switchmode control. The L293Band L293E are package in 16 and 20-pin plastic DIPs respectively ; both use the four center pins to conduct heat to the printed circuit board. PIN CONNECTIONS DIP16 - L293B DIP16 ORDERING NUMBER : L293B POWERDIP (16 + 2+ 2) ORDERING NUMBER : L293E POWERDIP (16+2+2) - L293E April 1993 1/12 L293B - L293E BLOCK DIAGRAMS DIP16 - L293B POWERDIP (16+2+2) - L293E 2/12 L293B - L293E SCHEMATIC DIAGRAM (*) In the L293 these points are not externally available. They are internally connected to the ground (substrate). O Pins of L293 () Pins of L293E. 3/12 L293B - L293E ABSOLUTE MAXIMUM RATINGS Symbol Vs Vss Vi Vinh Iout Ptot Tstg, Tj Parameter Supply Voltage Logic Supply Voltage Input Voltage Inhibit Voltage Peak Output Current (non repetitive t = 5ms) o Total Power Dissipation at Tground-pins = 80 C Storage and Junction Temperature Value 36 36 7 7 2 5 -40 to +150 Unit V V V V A W o C THERMAL DATA Symbol Rth j-case R th j-amb Parameter Thermal Resistance Junction-case Thermal Resistance Junction-ambient Max. Max. Value 14 80 Unit C/W o C/W o ELECTRICAL CHARACTERISTICS For each channel, VS = 24V, VSS = 5V, Tamb = 25oC, unless otherwise specified Symbol Vs Vss Is Iss Parameter Supply Voltage Logic Supply Voltage Total Quiescent Supply Current Test Conditions Min. Vss 4.5 = = = = = = H H L H H L -03. 2.3 2.3 30 -0.3 2.3 2.3 -30 1.4 1.2 250 250 750 200 TYp. Max. 36 36 6 24 4 60 22 24 1.5 Vss 7 -10 100 1.5 Vss 7 -100 10 1.8 1.8 2 Unit V V mA Vi = L Vi = H Vi = L Vi = H Io = 0 Io = 0 Io = 0 Io = 0 Total Quiescent Logic Supply Current Vinh Vinh Vinh Vinh Vinh Vinh 2 16 44 16 16 mA ViL ViH IiL IiH VinhL VinhH IinhL IinhH VCEsatH VCEsatL VSENS tr tf ton toff * ** Input Low Voltage Input High Voltage Low Voltage Input Current High Voltage Input Current Inhibit Low Voltage Inhibit High Voltage Low Voltage Inhibit Current High Voltage Inhibit Current Source Output Saturation Voltage Sink Output Saturation Voltage Sensing Voltage (pins 4, 7, 14, 17) (**) Rise Time Fall Time Turn-on Delay Turn-off Delay VSS 7V Vss > 7V Vil = 1.5V 2.3V VIH Vss - 0.6V VSS 7V Vss > 7V VinhL = 1.5V 2.3V Vinh H Vss - 0.6V Io = -1A Io = 1A 0.1 0.9 0.5 0.5 to to Vi Vi 0.9 Vo (*) 0.1 Vo (*) to 0.5 Vo (*) to 0.5 Vo (*) V V A A V V A A V V V ns ns ns ns See figure 1 Referred to L293E TRUTH TABLE Vi (each channel) H L H L Vo H L o X() o X() Vinh () H H L L (*) High output impedance (**) Relative to the considerate channel 4/12 L293B - L293E Figure 1 : Switching Timers Figure 2 : Saturation voltage versus Output Current Figure 3 : Source Saturation Voltage versus Ambient Temperature Figure 4 : Sink Saturation Voltage versus Ambient Temperature Figure 5 : Quiescent Logic Supply Current versus Logic Supply Voltage 5/12 L293B - L293E Figure 6 : Output Voltage versus Input Voltage Figure 7 : Output Voltage versus Inhibit Voltage APPLICATION INFORMATION Figure 8 : DC Motor Controls (with connection to ground and to the supply voltage) Figure 9 : Bidirectional DC Motor Control Vinh H H L A H L X Run M1 Fast Motor Stop Free Running Motor Stop H = High B H L X Run M2 Fast Motor Stop Free Running Motor Stop X = Don't Care Inputs Vinh = H C= H;D=L C = L; D =H C=D Vinh = L L = Low C = X; D =X H = High Function Turn Right Turn Left Fast Motor Stop Free Running Motor Stop X = Don't Care L = Low 6/12 L293B - L293E Figure 10 :Bipolar Stepping Motor Control 7/12 L293B - L293E Figure 11 :Stepping Motor Driver with Phase Current Control and Short Circuit Protection 8/12 L293B - L293E MOUNTING INSTRUCTIONS The Rth j-amb of the L293B and the L293E can be reduced by soldering the GND pins to a suitable copper area of the printed circuit board as shown in figure 12 or to an external heatsink (figure 13). Figure 12 :Example of P.C. Board Copper Area which is Used as Heatsink During soldering the pins temperature must not exceed 260oC and the soldering time must not be longer than 12 seconds. The external heatsink or printed circuit copper area must be connected to electrical ground. Figure 13 :External Heatsink Mounting Example (Rth = 30oC/W) 9/12 L293B - L293E DIP16 PACKAGE MECHANICAL DATA Dimensions Min. a1 B b b1 D E e e3 F i L Z 3.3 1.27 8.5 2.54 17.78 7.1 5.1 0.130 0.050 0.51 0.77 0.5 0.25 20 0.335 0.100 0.700 0.280 0.201 1.65 Millimeters Typ. Max. Min. 0.020 0.030 0.020 0.010 0.787 DIP16PW.TBL PMDIP16W.EPS Inches Typ. Max. 0.065 a1 I b Z B e3 e L b1 E D 16 9 1 8 10/12 F L293B - L293E POWERDIP (16+2+2) PACKAGE MECHANICAL DATA Dimensions Min. a1 B b b1 D E e e3 F i L Z 3.3 1.27 8.8 2.54 22.86 7.1 5.1 0.130 0.050 0.38 0.51 0.85 0.5 0.5 24.8 0.346 0.100 0.900 0.280 0.201 0.015 1.4 Millimeters Typ. Max. Min. 0.020 0.033 0.020 0.020 0.976 DIP20PW.TBL Inches Typ. Max. 0.055 a1 I b Z e3 B e Z L b1 E D 20 11 1 10 11/12 PMDIP20WEPS F L293B - L293E Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. SGS-THOMSON Microelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of SGS-THOMSON Microelectronics. (c) 1994 SGS-THOMSON Microelectronics - All Rights Reserved SGS-THOMSON Microelectronics GROUP OF COMPANIES Australia - Brazil - France - Germany - Hong Kong - Italy - Japan - Korea - Malaysia - Malta - Morocco - The Netherlands - Singapore Spain - Sweden - Switzerland - Taiwan - Thaliand - United Kingdom - U.S.A. 12/12 |
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