Datasheet

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L293B

L293E

July 2003

■ 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

capable of delivering output currents to 1A per

channel. Each channel is controlled by 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 in-

put 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 L293B and 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.

DIP16 POWERDIP(16+2+2)

ORDERING NUMBERS:

L293B L293E

PUSH-PULL FOUR CHANNEL DRIVERS

PIN CONNECTION (Top view)

DIP16 - L293B

POWERDIP (16+2+2) - L293E

Summary of content (12 pages)

PAGE 1
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.
PAGE 2
L293E L293B BLOCK DIAGRAMS DIP16 - L293B POWERDIP (16+2+2) - L293E 2/12
PAGE 3
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.
PAGE 4
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.
PAGE 5
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.
PAGE 6
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.
PAGE 7
L293E L293B Figure 10.
PAGE 8
L293E L293B Figure 11.
PAGE 9
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.
PAGE 10
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.
PAGE 11
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.
PAGE 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.