LM18298 Dual Full-Bridge Driver General Description Features The LM18298 is a high voltage, high current dual full-bridge driver designed to accept standard TTL logic levels and drive inductive loads such as relays, solenoids, DC and stepping motors. Two enable inputs are provided to gate the input control signals. The emitters of the lower transistors of each bridge are connected together and the corresponding external terminal can be used for the connection of a current sensing resistor. An additional supply input is provided to accommodate conventional logic supply voltages. Y Y Y Y Y Y Power supply voltage up to 46V 2A output per channel Low saturation voltage Thermal shutdown protection Logical ‘‘0’’ input voltage up to 1.5V (High noise immunity) Pin for pin replacement for L298N Applications Y Y DC and stepper motor drivers Relay and solenoid drivers Block & Connection Diagrams TL/H/9302 – 1 TL/H/9302 – 2 TO 220-15 Order Number LM18298T NS Package Number TA15A C1995 National Semiconductor Corporation TL/H/9302 RRD-B30M115/Printed in U. S. A. LM18298 Dual Full-Bridge Driver April 1992 Absolute Maximum Ratings (Note 1) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/Distributors for availability and specifications. Main Supply (Pin 4) Logic Supply (Pin 9) Logic Inputs (Pins 5, 6, 7, 10, 11, 12) b 1 to a 2.3V 25W ESD Susceptibility (Note 3) 1 kV Lead Temperature (Soldering, 10 seconds) 260§ C b 65§ C to a 150§ C Storage Temperature Range 50V 7V b 0.3 to 7V Peak Output Current (Per Channel) Non-Repetitive (t e 100 ms) Repetitive (80% duty cycle, tON e 10 ms) DC Operation Sense Voltage (Pins 1, 15) Power Dissipation (Note 2) Operating Ratings Junction Temperature Range (TJ) Main Supply (Pin 4) 3A 2.5A 2A b 40§ C to a 150§ C 46V Electrical Characteristics VS e 42V, VSS e 5V, IO e 0A, TJ e 25§ C, L e 0V, H e 5V, unless otherwise specified Symbol VS VSS IS Parameter Conditions Typical (Note 4) Main Supply Voltage (Pin 4) Logic Supply Voltage (Pin 9) Main Supply Quiescent Current (Pin 4) Logic Supply Quiescent Current (Pin 9) VIH V (max) 4.5 V (min) 7 V (max) 9 22 32 70 Enable e H, Input e L 22 36 Enable e H, Input e H 6 12 Input e L IIH High Level Input Current (Pins 5, 7, 10, 12) Input e H VEN L Low Level Enable Voltage (Pins 6, 11) 30 High Level Enable Voltage (Pins 6, 11) IEN L Low Level Enable Input Current (Pins 6, 11) Enable e L IEN H High Level Enable Input Current (Pins 6, 11) Enable e H 2 mA (max) 6 High Level Input Voltage (Pins 5, 7, 10, 12) Low Level Input Current (Pins 5, 7, 10, 12) mA (max) 4 Low Level Input Voltage (Pins 5, 7, 10, 12) IIL VEN H V (min) 46 Enable e H, Input e L Enable e L, Input e X VIL Units (Limits) VSS a 2.5 Enable e H, Input e H Enable e L, Input e X ISS Limit (Note 5) 30 b 0.3 V (min) 1.5 V (max) 2.3 V (min) VSS V (max) b 10 mA (max) 100 mA (max) b 0.3 V (min) 1.5 V (max) 2.3 V (min) VSS V (max) b 10 mA (max) 100 mA (max) Electrical Characteristics (Continued) VS e 42V, VSS e 5V, IO e 0A, TJ e 25§ C, unless otherwise specified Symbol VCE sat (H) VCE sat (L) VCE sat Vsense Parameter Source Saturation Voltage (Pins 2, 3, 13, 14) Sink Saturation Voltage (Pins 2, 3, 13, 14) Total Drop VCE sat (H) a VCE sat (L) Sensing Voltage (Pins 1, 15) Conditions Typical (Note 4) Limit (Note 5) IO e 1A 1.35 1.7 IO e 2A 2.0 2.7 IO e 1A 1.2 1.6 IO e 2A 1.7 2.3 IO e 1A 3.2 IO e 2A 4.9 t s 50 ms b1 Continuous Units (Limits) V (max) V (max) V (max) V (min) b 0.5 Continuous 2 V (max) T1 Source Current Turn-Off Delay 0.5 Input to 0.9 IO (Figure 2 ) 0.5 T2 Source Current Fall Time 0.9 IO to 0.1 IO (Figure 2 ) 0.15 ms T3 Source Current Turn-On Delay 0.5 Input to 0.1 IO (Figure 2 ) 1.3 ms T4 Source Current Rise Time 0.1 IO to 0.9 IO (Figure 2 ) 0.85 ms T5 Sink Current Turn-Off Delay 0.5 Input to 0.9 IO (Figure 3 ) 0.25 ms T6 Sink Current Fall Time 0.9 IO to 0.1 IO (Figure 3 ) 0.1 ms T7 Sink Current Turn-On Delay 0.5 Input to 0.1 IO (Figure 3 ) 1.3 ms T8 Sink Current Rise Time 0.1 IO to 0.9 IO (Figure 3 ) 0.1 ms fC Commutation Frequency IO e 2A 25 kHz ms Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. DC and AC electrical specifications do not apply when operating the device beyond its specified Operating Ratings. Note 2: The maximum power dissipation must be derated at elevated temperatures and is a function of TJ max, iJC, and TC. The maximum allowable power dissipation at any temperature is PD max e (TJ max b TC)/iJC or the number given in the Absolute Maximum Ratings, whichever is lower. The typical junction-tocase thermal resistance (iJC) of the LM18298 is 3§ C/W. Note 3: Human body model, 100 pF discharged through a 1.5 kX resistor. Note 4: Typicals are at 25§ C and represent the most likely parametric norm. Note 5: Limits are guaranteed and 100% tested. 3 Typical Performance Characteristics Output Voltage (See Figure 1 ) Output Voltage (See Figure 1 ) Maximum Power Dissipation TL/H/9302 – 3 Source Current Switching Times Source Current Switching Times Main Supply Quiescent Current (IS, Pin 4) TL/H/9302 – 12 Sink Current Switching Times Sink Current Switching Times Logic Supply Quiescent Current (ISS, Pin 9) TL/H/9302 – 13 4 Test Circuits TL/H/9302 – 4 FIGURE 1. Input/Enable Threshold Test Circuit TL/H/9302–5 FIGURE 2(a). Source Current Switching Time Test Circuit TL/H/9302 – 6 FIGURE 2(b). Source Current Switching Time Definitions TL/H/9302–7 FIGURE 3(a). Sink Current Switching Time Test Circuit TL/H/9302 – 8 FIGURE 3(b). Sink Current Switching Time Definitions 5 Applications Information TL/H/9302 – 10 TL/H/9302–9 Enable B Inputs Input 3 e H, Input 4 e L Motor 1 Input 4 Clockwise H H Dynamic Braking H Run H Input 3 e L, Input 4 e H Counterclockwise H L Run L Dynamic Braking Input 3 e Input 4 Dynamic Braking Input 3 e X, Input 4 e Input 3 Coast to a Stop L X X Coast to a Stop L L e Low H e High Motor Direction Enable B Input 3 Coast to a Stop L e Low H e High Motor 2 X e Don’t Care FIGURE 5. 2-Motor Controller (Using both High- and Low-Side Driver Modes) X e don’t care FIGURE 4. Bidirectional DC Motor Control TL/H/9302 – 11 FIGURE 6. Two-Phase Bipolar Stepper Motor Control Circuit of 1.2V or less at the rated load current. Typical devices are the MB346 (Microsemi Corp., Santa Ana, CA), and the V331X (Varo Semiconductor Inc., Garland, TX). CLAMP DIODES When driving inductive loads, diodes are necessary to clamp spikes at the LM18298 outputs. Clamp diodes must have a recovery time of 200 ns or better and a forward drop 6 7 LM18298 Dual Full-Bridge Driver Physical Dimensions inches (millimeters) Order Number LM18298T See NS Package Number TA15A 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 Fran3ais 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.