LM18293N

LM18293 Four Channel Push-Pull Driver March 1995 LM18293 Four Channel Push-Pull Driver General Description The LM18293 is designed to drive DC loads up to one amp Typical applications include driving such inductive loads as solenoids relays and stepper motors along with driving switching power transistors and use as a buffer for low level logic signals The four inputs accept standard TTL and DTL levels for ease of interfacing Two enable pins are provided that also accept the standard TTL and DTL levels Each enable controls 2 channels and when an enable pin is disabled (tied low) the corresponding outputs are forced to the TRI-STATE condition If the enable pins are not connected (i e floating) the circuit will function as if it has been enabled Separate pins are provided for the main power supply (pin 8) and the logic supply (pin 16) This allows a lower voltage to be used to bias up the logic resulting in reduced power dissipation The chip is packaged in a specially designed 16 pin power DIP The 4 center pins of this package are tied together and form the die paddle inside the package This provides much better heat sinking capability than most other DIP packages available The device is capable of operating at voltages up to 36 volts Features Y Y Y Y Y Y 1A output current capability per channel Pin for pin replacement for L293B Special 16 pin power DIP package 36 volt operation Internal thermal overload protection Logical ‘‘0’’ input voltage up to 1 5 volts results in high noise immunity Typical Connection TL H 8706 – 1 FIGURE 1 Application circuit showing bidirectional and on off control of a single DC motor using two outputs and unidirectional on off function of two DC motors using a single output each Order Number LM18293N NS Package Number N16A TRI-STATE is a registered trademark of National Semiconductor Corp C1995 National Semiconductor Corporation TL H 8706 RRD-B30M115 Printed in U S A Absolute Maximum Ratings If Military Aerospace specified devices are required please contact the National Semiconductor Sales Office Distributors for availability and specifications Output Drive Supply Voltage (VS) Logic Supply Voltage (VSS) Input Voltage (VI) Enable Voltage (VE) 36V 36V 7V 7V Peak Output Current (Non-Repetitive t e 5 ms) Junction Temperature (TJ) Thermal Resistance Junction to Case (iJC) 2A a 150 C 14 C W Thermal Resistance Junction to Ambient (iJA) 80 C W Internal Power Dissipation Internally Limited b 40 C to a 125 C Operating Temperature Range b 65 C to a 150 C Storage Temperature Range Lead Temperature (Solder 10 seconds) 260 C Electrical Characteristics VS e 24V VSS e 5V T e 25 C L e 0 4V H e 3 5V each channel unless otherwise noted Symbol VS VSS IS Parameter Main Supply (Pin 8) Logic Supply (Pin 16) Total Quiescent Supply Current Total Quiescent Logic Supply Current (pin 16) Input Voltage Conditions Maximum Supply Voltage Minimum Logic Supply Voltage Maximum Logic Supply Voltage VI e L VI e H VI e L VI e H IO e 0 IO e 0 IO e 0 IO e 0 VE e H VE e H VE e L VE e H VE e H VE e L 2 16 44 16 16 Typical Tested Limit (Note 1) 36 45 36 6 24 4 60 22 24 b0 3 Design Limit (Note 2) Units Vmax Vmin Vmax mAmax mAmax mAmax mAmax mAmax mAmax Vmin Vmax Vmin Vmax Vmax mAmax mAmax Vmin Vmax Vmin Vmax Vmax mAmax mAmax Vmax Vmax ns ns ns ns ISS VI Min Value of Low Max Value of Low Min Value of High Max Value of High (VSS s 7) Max Value of High (VSS l 7) VI e L VI e H Min Value of Low Max Value of Low Min Value of High Max Value of High (VSS s7) Max Value of High (VSS l7) VE e L VE e H Io e b1 amp Io e 1 amp 10%–90% Vo 90%–10% Vo 50% VI to 50% Vo 50% VI to 50% Vo b 30 15 23 VSS 7 b 10 II VE Input Current Enable Voltage (Pins 1 9) 30 100 b0 3 15 23 VSS 7 b 100 g 10 IE VCE sat Top VCE sat Bottom tr tf ton toff Enable Current Source Saturation Voltage Sink Saturation Voltage Rise Time Fall Time Turn-On Delay Turn-Off Delay 14 12 250 250 450 200 18 18 Note 1 Tested limits are guaranteed and 100% production tested Note 2 Design limits are guaranteed (but not 100% production tested) over the full supply and temperature range These limits are not used to calculate outgoing quality levels 2 Connection Diagram Input Output Truth Table VE ( H H L L ( ) High output impedance ( ) Relative to the pertinent channel ) VI (Each Channel) H L H L VO H L X( ) X( ) Enable 1 activates outputs 1 Enable 2 activates outputs 3 2 4 TL H 8706 – 2 Simplified Schematic TL H 8706 – 3 3 Typical Performance Characteristics VS In all cases e 24V Output Voltage vs Input Voltage Output Voltage vs Enable Voltage Saturation Voltage vs Output Current Source Saturation Voltage vs Ambient Temperature Sink Saturation Voltage vs Ambient Temperature Quiescent Logic Supply Current vs Logic Supply Voltage TL H 8706 – 4 Typical Applications DC motor controls (with connections to ground and to the supply voltages) Bidirectional DC motor control TL H 8706 – 5 TL H 8706 – 6 VE H H H H L L e Low Pin 10 H H L L X Pin 15 H L H L X M1 Fast Motor Stop Fast Motor Stop Run Run Free Running Motor Stop X e Don’t care M2 Run Fast Motor Stop Run Fast Motor Stop Free Running Motor Stop VE e L L e Low Inputs Pin 10 e H Pin 15 e L VE e H Pin 10 e L Pin 15 e H Pin 10 e Pin 15 Pin 10 e X Pin 15 e X X e Don’t care Function Turn CW Turn CCW Fast Motor Stop Free Running Motor Stop H e High H e High 4 Bipolar Stepping Motor Control Step Sequencing Tables Full Step VIN 1 L L H H L VIN 2 L H H L L VE 1 and VE 2 e H Half Step VE 1 H H L H H H L H H H e High Motor Control Block Diagram Step 1 2 3 4 1 VE 2 L H H H L H H H L L e Low VIN 1 L L X H H H X L L VIN 2 X L L L X H H H X Step 1 2 3 4 5 6 7 8 1 TL H 8706 – 7 X e Don’t care Mounting Instructions The junction to ambient thermal resistance of the LM18293 can be reduced by soldering the ground pins to a suitable copper area of the printed circuit board or to an external heatsink The graph below which shows the maximum power dissipated and junction to ambient thermal resistance as a function of the side ‘‘l’’ of two equal square copper areas having a thickness of 35m illustrates this In addition it is possible to use an external heatsink (see illustration below) During soldering the pins temperature must not exceed 230 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 Staver External Heat-sink Maximum power dissipated and junction to ambient thermal resistance vs size TL H 8706 – 8 TL H 8706 – 9 TL H 8706 – 10 5 LM18293 Four Channel Push-Pull Driver Mounting Instructions (Continued) Maximum Allowable Power Dissipation vs Ambient Temperature TL H 8706 – 11 Physical Dimensions inches (millimeters) Lit 108380 Molded Dual-In-Line Package (N) Order Number LM18293N NS Package Number N16A LIFE SUPPORT POLICY NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF NATIONAL SEMICONDUCTOR CORPORATION As used herein 1 Life support devices or systems are devices or systems which (a) are intended for surgical implant into the body or (b) support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided in the labeling can be reasonably expected to result in a significant injury to the user National Semiconductor Corporation 1111 West Bardin Road Arlington TX 76017 Tel 1(800) 272-9959 Fax 1(800) 737-7018 2 A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system or to affect its safety or effectiveness National Semiconductor Europe Fax (a49) 0-180-530 85 86 Email cnjwge tevm2 nsc com Deutsch Tel (a49) 0-180-530 85 85 English Tel (a49) 0-180-532 78 32 Fran ais Tel (a49) 0-180-532 93 58 Italiano Tel (a49) 0-180-534 16 80 National Semiconductor Hong Kong Ltd 13th Floor Straight Block Ocean Centre 5 Canton Rd Tsimshatsui Kowloon Hong Kong Tel (852) 2737-1600 Fax (852) 2736-9960 National Semiconductor Japan Ltd Tel 81-043-299-2309 Fax 81-043-299-2408 National does not assume any responsibility for use of any circuitry described no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications