L293B

L293B L293E 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 DIP16 POWERDIP(16+2+2) ORDERING NUMBERS: The L293B and L293E are quad push-pull drivers capable of delivering output currents to 1A per channel. Each channel is controlled by a TTLcompatible 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 L293B L293E sensing resistors, for switchmode control. The L293B and L293E are package in 16 and 20pin plastic DIPs respectively ; both use the four center pins to conduct heat to the printed circuit board. PIN CONNECTION (Top view) POWERDIP (16+2+2) - L293E DIP16 - L293B July 2003 1/12 L293E L293B BLOCK DIAGRAMS DIP16 - L293B POWERDIP (16+2+2) - L293E 2/12 L293E L293B 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. 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) 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 oC 3/12 L293E L293B THERMAL DATA Symbol Parameter Value Unit Rth j-case Thermal Resistance Junction-case Max. 14 o Rth j-amb Thermal Resistance Junction-ambient Max. 80 o C/W C/W ELECTRICAL CHARACTERISTCS Symbol Parameter Test Condition Min. Typ. Max. Unit Vs Supply Voltage V ss 36 V V ss Logic Supply Voltage 4.5 36 V Is Total Quiescent Supply Current Vi = L; Io = 0; Vinh = H 2 6 mA Vi = h; Io = 0; Vinh = H 16 24 mA 4 mA Vinh = L Iss Total Quiescent Logic Supply Current ViL Input Low Voltage ViH Input High Voltage Vi = L; Io = 0; Vinh = H 44 60 mA Vi = h; Io = 0; Vinh = H 16 22 mA Vinh = L 16 24 mA -0.3 1.5 V VSS ≤ 7V 2.3 Vss V VSS > 7V 2.3 7 V -10 µA IiL Low Voltage Input Current Vil = 1.5V IiH High Voltage Input Current 2.3V ≤ VIH ≤ VSS - 0.6V VinhL Inhibit Low Voltage VinhH Inhibit High Voltage 100 µA -0.3 1.5 V VSS ≤7V 2.3 V ss V VSS > 7V 2.3 7 V -100 µA ±10 µA IinhL Low Voltage Inhibit Current VinhL = 1.5V IinhH High Voltage Inhibit Current 2.3V ≤VinhH≤ Vss- 0.6V 30 -30 VCEsatH Source Output Saturation Voltage Io = -1A 1.4 1.8 V VCEsatL Sink Output Saturation Voltage 1.2 1.8 V VSENS Sensing Voltage (pins 4, 7, 14, 17) (**) 2 V Io = 1A tr Rise Time 0.1 to 0.9 Vo (*) 250 ns tf Fall Time 0.9 to 0.1 Vo (*) 250 ns ton Turn-on Delay 0.5 Vi to 0.5 Vo (*) 750 ns toff Turn-off Delay 0.5 Vi to 0.5 Vo (*) 200 ns * See figure 1 ** Referred to L293E TRUTH TABLE Vi (each channel) Vo Vinh (**) H H H L L H H X (*) L L X (*) L (*) High output impedance (**) Relative to the considerate channel 4/12 L293E L293B Figure 1. Switching Timers Figure 2. Saturation voltage versus Output Current Figure 4. Sink Saturation Voltage versus Ambient Temperature Figure 3. Source Saturation Voltage versus Ambient Temperature Figure 5. Quiescent Logic Supply Current versus Logic Supply Voltage 5/12 L293E L293B Figure 6. Output Voltage versus Input Voltage APPLICATION INFORMATION Figure 8. DC Motor Controls (with connection to ground and to the supply voltage) Figure 7. Output Voltage versus Inhibit Voltage Vinh A H H Fast Motor Stop H Run H L Run L Fast Motor Stop L X Free Running X Free Running M1 B Motor Stop L = Low H = High M2 Motor Stop X = Don’t Care Figure 9. Bidirectional DC Motor Control Inputs Vinh = H Vinh = L L = Low 6/12 Function C=H;D=L Turn Right C=L;D=H Turn Left C=D Fast Motor Stop C = X ; D = X Free Running Motor Stop H = High X = Don’t Care L293E L293B Figure 10. Bipolar Stepping Motor Control 7/12 L293E L293B Figure 11. Stepping Motor Driver with Phase Current Control and Short Circuit Protection 8/12 L293E L293B MOUNTING INSTRUCTIONS The R th 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). During soldering the pins temperature must not exceed 260°C 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 12. Example of P.C. Board Copper Area which is Used as Heatsink Figure 13. External Heatsink Mounting Example (Rth = 30°C/W) 9/12 L293E L293B mm DIM. MIN. a1 0.51 B 0.77 TYP. inch MAX. MIN. TYP. MAX. 0.020 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 OUTLINE AND MECHANICAL DATA 3.3 0.130 DIP16 Z 10/12 1.27 0.050 L293E L293B mm DIM. MIN. a1 0.51 B 0.85 b b1 TYP. inch MAX. MIN. TYP. MAX. 0.020 1.40 0.033 0.50 0.38 0.055 0.020 0.50 D 0.015 0.020 24.80 0.976 E 8.80 0.346 e 2.54 0.100 e3 22.86 0.900 F 7.10 0.280 I 5.10 0.201 L OUTLINE AND MECHANICAL DATA 3.30 0.130 Powerdip 20 Z 1.27 0.050 11/12 L293E L293B Information furnished is believed to be accurate and reliable. However, STMicroelectronics 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 STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. 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