L293B L293E
PUSH-PULL FOUR CHANNEL DRIVERS
s s s s s s
OUTPUT CURRENT 1A PER CHANNEL PEAK OUTPUT CURRENT 2A PER CHANNEL (non repetitive) INHIBIT FACILITY HIGH NOISE IMMUNITY SEPARATE LOGIC SUPPLY OVERTEMPERATURE PROTECTION
DIP16
POWERDIP(16+2+2)
DESCRIPTION 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 PIN CONNECTION (Top view)
ORDERING NUMBERS: 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.
POWERDIP (16+2+2) - L293E
DIP16 - L293B
July 2003
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L293E L293B
BLOCK DIAGRAMS
DIP16 - L293B
POWERDIP (16+2+2) - L293E
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L293E L293B
SCH EMATIC 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 = 80C Storage and Junction Temperature Value 36 36 7 7 2 5 40 to +150 Unit V V V V A W
oC
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L293E L293B
THERMAL DATA
Symbol Rth j-case Rth j-amb Parameter Thermal Resistance Junction-case Thermal Resistance Junction-ambient Max. Max. Value 14 80 Unit
o o
C/W C/W
ELECTRICAL CHARACTERISTCS
Symbol Vs
V
Parameter Supply Voltage Logic Supply Voltage Total Quiescent Supply Current
Test Condition
Min.
V
Typ.
Max. 36 36
Unit V V mA mA mA mA mA mA V
ss
ss
4.5 Vi = L; Io = 0; Vinh = H Vi = h; Io = 0; Vinh = H Vinh = L 2 16 44 16 16 -0.3 VSS 7V VSS > 7V Vil = 1.5V 2.3V VIH VSS - 0.6V -0.3 VSS 7V VSS > 7V 2.3 2.3 -30 1.4 1.2 30 2.3 2.3
Is
6 24 4 60 22 24 1.5
Iss
Total Quiescent Logic Supply Current
Vi = L; Io = 0; Vinh = H Vi = h; Io = 0; Vinh = H Vinh = L
ViL
Input Low Voltage Input High Voltage
V iH
IiL IiH VinhL VinhH
Vss
7 -10 100 1.5
V
V
V A A V V V A A V V V ns ns ns ns
Low Voltage Input Current High Voltage Input Current Inhibit Low Voltage Inhibit High Voltage
ss
7 -100 1 0 1.8 1.8 2
IinhL IinhH VCEsatH VCEsatL VSENS tr tf ton toff
Low Voltage Inhibit Current High Voltage Inhibit Current Sink Output Saturation Voltage Sensing Voltage (pins 4, 7, 14, 17) (**) Rise Time Fall Time Turn-on Delay Turn-off Delay
VinhL = 1.5V 2.3V VinhH Vss- 0.6V Io = 1A
Source Output Saturation Voltage Io = -1A
0.1 to 0.9 Vo (*) 0.9 to 0.1 Vo (*) 0.5 Vi to 0.5 Vo (*) 0.5 Vi to 0.5 Vo (*)
250 250 750 200
* See figure 1 ** Referred to L293E
TRUTH TABLE
Vi (each channel) H L H L
(*) High output impedance (**) Relative to the considerate channel
Vo H L X
(*)
Vinh (**) H H L L
X (*)
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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
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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 H H L A H L X M1 Fast Motor Stop Run Free Running Motor Stop
L = Low H = High X = Don't Care
B H L X Run
M2
Fast Motor Stop Free Running Motor Stop
Figure 9. Bidirectional DC Motor Control
Inputs Vinh = H C=H;D=L C=L;D=H C=D Vinh = L
L = Low H = High
Function Turn Right Turn Left Fast Motor Stop
C = X ; D = X Free Running Motor Stop
X = Don't Care
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L293E L293B
Figure 10. Bipolar Stepping Motor Control
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L293E L293B
Figure 11. Stepping Motor Driver with Phase Current Control and Short Circuit Protection
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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 260C 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 = 30C/W)
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L293E L293B
DIM. MIN. a1 B b b1 D E e e3 F I L Z 0.51 0.77
mm TYP. MAX. MIN. 0.020 1.65 0.5 0.25 20 8.5 2.54 17.78 7.1 5.1 3.3 1.27 0.030
inch TYP. MAX.
OUTLINE AND MECHANICAL DATA
0.065 0.020 0.010 0.787 0.335 0.100 0.700 0.280 0.201 0.130
DIP16
0.050
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L293E L293B
DIM. MIN. a1 B b b1 D E e e3 F I L Z 0.38 0.51 0.85
mm TYP. MAX. MIN. 0.020 1.40 0.50 0.50 24.80 8.80 2.54 22.86 7.10 5.10 3.30 1.27 0.015 0.033
inch TYP. MAX.
OUTLINE AND MECHANICAL DATA
0.055 0.020 0.020 0.976 0.346 0.100 0.900 0.280 0.201 0.130
Powerdip 20
0.050
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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. STMicroelectronics acknowledges the trademarks of all companies referred to in this document. The ST logo is a registered trademark of STMicroelectronics 2003 STMicroelectronics - All Rights Reserved STMicroelectronics GROUP OF COMPANIES Australia - Brazil - Canada - China - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan -Malaysia - Malta - Morocco Singapore - Spain - Sweden - Switzerland - United Kingdom - United States. http://www.st.com
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