L293 L293D Push-Pull Four Channel Driver FEATURES * Output Current 1A Per Channel (600mA for L293D) * Peak Output Current 2A Per Channel (1.2A for L293D) * Inhibit Facility * High Noise Immunity * Separate Logic Supply * Over-Temperature Protection DESCRIPTION The L293 and L293D are quad push-pull drivers capable of delivering output currents to 1A or 600mA per channel respectively. 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 input is provided for the logic so that it may be run off a lower voltage to reduce dissipation. Additionally the L293D includes the output clamping diodes within the IC for complete interfacing with inductive loads. Both devices are available in 16-pin Batwing DIP packages. They are also available in Power S0IC and Hermetic DIL packages. TRUTH TABLE ABSOLUTE MAXIMUM RATINGS VI VINH* VO (each channel) H H H L H L H L X** L L X** *Relative to the considered channel **High output impedence Collector Supply Voltage, VC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36V Logic Supply Voltage, VSS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36V Input Voltage, VI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7V Inhibit Voltage, VINH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7V Peak Output Current (Non-Repetitive), lOUT (L293) . . . . . . . . . . . . . . 2A lOUT (L293D) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.2A Total Power Dissipation at Tground-pins = 80C, N Batwing pkg, (Note) . . . . . . . . . . . . . . . 5W Storage and Junction Temperature, Tstg, TJ . . . . . . . . . . -40 to +150C Note:Consult packaging section of Databook for thermal limitations and considerations of packages. BLOCK DIAGRAM Note: Output diodes are internal in L293D. 8/94 L293 L293D CONNECTION DIAGRAMS DIL-16 (TOP VIEW) N Package, SP Package SOIC-28 (TOP VIEW) DWP Package ELECTRICAL CHARACTISTICS: (For each channel, VC = 24V, VSS = 5V, TAMB = 25C, unless otherwise specified; TA = TJ) PARAMETER SYMBOL Collector Supply Voltage VC Logic Supply Voltage VSS Collector Supply Current IC TEST CONDITION MIN. TYP. 4.5 ISS Input Low Voltage VIL Input High Voltage VIH Low Voltage Input Current IIL High Voltage Input Current IIH Inhibit Low Voltage VINH, L Inhibit High Voltage VINH, H Low Voltage Inhibit Current VINH, L 36 V 36 V VI = L, IO = 0, VINH = H 2 6 mA VI = H, IO = 0, VINH = H 16 24 4 mA mA 44 60 mA VINH = L Total Quiescent Logic Supply Current MAX. UNITS VI = L, IO = 0, VINH = H 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 -10 100 A A VI = 0V VI = 4.5V 30 -0.3 1.5 V VSS 7V 2.3 VSS V VSS >7V 2.3 7 V -30 -100 A High Voltage Inhibit Current VINH, H 10 A Source Output Saturation Voltage VCEsatH IO = -1A (-0.6A for L293D) 1.4 1.8 V Sink Output Saturation Voltage VCEsatL VF IO = 1A (0.6A for L293D) IF = 0.6A 1.2 1.3 1.8 Clamp Diode Forward Voltage (L293D only) V V Rise Time TR 0.1 to 0.9 VO (See Figure 1) 100 ns Fall Time TF 0.9 to 0.1 VO (See Figure 1) 350 ns Turn-on Delay TON 0. 5 VI to 0.5 VO (See Figure 1) 750 ns Turn-off Delay TOFF 0. 5 VI to 0.5 VO (See Figure 1) 200 ns 2 L293 L293D SCHEMATIC DIAGRAM APPLICATION INFORMATION Figure 1: Switching Times Figure 4: L293 Saturation vs Output Currrent Figure 2: Quiescent Logic Supply Current vs Logic Supply Voltage Figure 3: Output Voltage vs Input Voltage Figure 5: L293 Source Saturation vs Ambient Temperature Figure 6: L293 Sink Saturation Voltage vs Ambient Temperature NOTE: For L293D curves, multiply output current by 0.6. 3 L293 L293D APPLICATION INFORMATION (Cont.) Figure 7: DC Motor Controls (with Connection to Ground and to Supply Voltage) VINH H H A H L L X L = Low M1 Fast Motor Stop Run Free Running Motor Stop H = High B H L X Figure 8: Bidirectional DC Motor Control INPUTS C = H; D = L VINH = H C = L; D = H C=D M2 Run Fast Motor Stop Free Running Motor Stop VINH = L C = X; D = X X = Don't Care L = Low H = High Figure 9: Bipolar Stepping Motor Control 4 FUNCTION Turn Right Turn Left Fast Motor Stop Free Running Motor Stop X = Don't Care L293 L293D MOUNTING INSTRUCTIONS Figure 10). In addition, it is possible to use an external heatsink (see Figure 11). The Rthj-amp of the L293 can be reduced by soldering the GND pins to a suitable copper area of the printed circuit board or to an external heatsink. During soldering the pins' temperature must not exceed 260C and the soldering time must not be longer than 12 seconds. The diagram of Figure 13 shows the maximum package power Ptot and the JA as a function of the side "l" of two equal square copper areas having a thickness of 35 (see The external heatsink or printed circuit copper area must be connected to electrical ground. Figure 10: Example of P.C. Board Copper Area which is used as Heatsink Figure 11: External Heatsink Mounting Example ( JA = 25C/W) Figure 12: Maximum Package Power and Junction to Ambient Thermal Resistance Figure 13: Maximum Allowable Power Dissipation vs Ambient Temperature UNITRODE INTEGRATED CIRCUITS 7 CONTINENTAL BLVD. * MERRIMACK, NH 03054 TEL. (603) 424-2410 * FAX (603) 424-3460 5