L239B

L293B STMICROELECTRONICS | Alldatasheet

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Technical content

PUSH-PULL FOUR CHANNEL DRIVERS .OUTPUT CURRENT 1A PER CHANNEL .PEAK OUTPUT CURRENT 2A PER CHANNEL (non repetitive) .INHIBIT FACILITY .HIGH NOISE IMMUNITY .SEPARATE LOGIC SUPPLY .OVERTEMPERATURE PROTECTION

DESCRIPTION

The L293B and L293E are quad push-pull drivers capableof delivering outputcurrents to 1Aperchan- nel. 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 L293Earepackage in16 and20-pin plastic DIPs respectively ; both use the four center pins to conduct heat to the printed circuit board. POWERDIP (16 + 2+ 2) ORDERING NUMBER : L293E DIP16 ORDERING NUMBER : L293B PIN CONNECTIONS DIP16 - L293B POWERDIP (16+2+2) - L293E

POWERDIP (16+2+2) - L293E L293B - L293E

(*) In the L293 these points are not externally available. They are internally connected to the ground (substrate). O Pins of L293 () Pins of L293E. L293B - L293E

Symbol Parameter Value Unit R th j-case Thermal Resistance Junction-case Max. 14 oC/W R th j-amb Thermal Resistance Junction-ambient Max. 80 oC/W

ELECTRICAL CHARACTERISTICS

For each channel, VS = 24V, VSS = 5V, Tamb =2 5oC, unless otherwise specified Symbol Parameter Test Conditions Min. TYp. Max. Unit Vs Supply Voltage V ss 36 V Vss Logic Supply Voltage 4.5 36 V Is Total Quiescent Supply Current V i =L I o =0 V inh=H Vi =H I o =0 V inh=H Vinh=L mA Iss Total Quiescent Logic Supply Current Vi =L I o =0 V inh=H Vi =H I o =0 V inh=H Vinh=L mA ViL Input Low Voltage -03. 1.5 V ViH Input High Voltage V SS ≤ 7V Vss >7 V 2.3 2.3 Vss V IiL Low Voltage Input Current V il= 1.5V -10 µA IiH High Voltage Input Current 2.3V ≤ VIH ≤ Vss - 0.6V 30 100 µA VinhL Inhibit Low Voltage -0.3 1.5 V VinhH Inhibit High Voltage V SS ≤ 7V Vss >7 V 2.3 2.3 Vss V IinhL Low Voltage Inhibit Current V inhL = 1.5V -30 -100 µA IinhH High Voltage Inhibit Current 2.3V ≤ VinhH ≤ Vss - 0.6V ±10 µA VCEsatH Source Output Saturation Voltage Io = -1A 1.4 1.8 V VCEsatL Sink Output Saturation Voltage I o = 1A 1.2 1.8 V VSENS Sensing Voltage (pins 4, 7, 14, 17) (**) 2 V tr Rise Time 0.1 to 0.9 V o (*) 250 ns tf Fall Time 0.9 to 0.1 V o (*) 250 ns ton Turn-on Delay 0.5 V i to 0.5 Vo (*) 750 ns toff Turn-off Delay 0.5 V i to 0.5 Vo (*) 200 ns * See figure 1 ** Referred to L293E ABSOLUTE MAXIMUM RATINGS Symbol Parameter Value Unit Vs Supply Voltage 36 V Vss Logic Supply Voltage 36 V Vi Input Voltage 7 V Vinh Inhibit Voltage 7 V Iout Peak Output Current (non repetitive t = 5ms) 2 A Ptot Total Power Dissipation at Tground-pins=8 0oC5 W Tstg,Tj Storage and Junction Temperature –40 to +150 oC TRUTH TABLE Vi (each channel) V o Vinh (∞ ) H L H L H L X( o) X( o) H H L L (*) High output impedance (**) Relative to the considerate channel L293B - L293E

Figure 10 :Bipolar Stepping Motor Control L293B - L293E

Fi g u r e1 1:Stepping Motor Driver with Phase Current Control and Short Circuit Protection L293B - L293E

The Rth j-ambof the L293B and the L293E can be re- duced by soldering the GND pins to a suitable cop- per area of the printed circuit board as shown in fig- ure 12 or to an external heatsink (figure 13). During soldering the pins temperature must not ex- ceed 260oC and the soldering time must not be longer than 12 seconds. The external heatsink or printed circuit copper area must be connectedto electrical ground. F i g u r e1 2:Example of P.C. Board Copper Area which is Used as Heatsink Figure 13 :External Heatsink Mounting Ex- ample (Rth = 30oC/W) L293B - L293E

I L B e D b Z F E PMDIP16W.EPS DIP16 PACKAGE MECHANICAL DATA Dimensions Millimeters Inches a1 0.51 0.020 B 0.77 1.65 0.030 0.065 b 0.5 0.020 b1 0.25 0.010 D 20 0.787 E 8.5 0.335 e 2.54 0.100 e3 17.78 0.700 F 7.1 0.280 i 5.1 0.201 L 3.3 0.130 Z 1.27 0.050 DIP16PW.TBL L293B - L293E

I L B e D Z b Z F E PMDIP20WEPS POWERDIP (16+2+2) PACKAGE MECHANICAL DATA Dimensions Millimeters Inches a1 0.51 0.020 B 0.85 1.4 0.033 0.055 b 0.5 0.020 b1 0.38 0.5 0.015 0.020 D 24.8 0.976 E 8.8 0.346 e 2.54 0.100 e3 22.86 0.900 F 7.1 0.280 i 5.1 0.201 L 3.3 0.130 Z 1.27 0.050 DIP20PW.TBL 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. Specifica- tions mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information pre- viously 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.  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. L293B - L293E