A2919SLB-T

2919 DUAL FULL-BRIDGE MOTOR DRIVER 2919 The A2919SB and A2919SLB motor drivers are designed to drive both windings of a bipolar stepper motor or bidirectionally control two dc motors. Both bridges are capable of sustaining 45 V and include internal pulse width modulation (PWM) control of the output current to 750 mA. The outputs have been optimized for a low output-saturation voltage drop (less than 1.8 V total source plus sink at 500 mA). For PWM current control, the maximum output current is determined by the user’s selection of a reference voltage and sensing resistor. Two logic-level inputs select output current limits of 0%, 41%, 67%, or 100% of the maximum level. A PHASE input to each bridge determines load current direction. The bridges include both ground clamp and flyback diodes for protection against inductive transients. Internally generated delays prevent crossover currents when switching current direction. Special power-up sequencing is not required. Thermal protection circuitry disables the outputs if the chip temperature exceeds safe operating limits. The A2919SB is supplied in a 24-pin dual in-line plastic batwing package with a copper lead-frame and heat sinkable tabs for improved power dissipation capabilities. The A2919SLB is supplied in a 24-lead surface-mountable SOIC. Their batwing construction provides for maximum package power dissipation in the smallest possible construction. The A2919SB/SLB are available for operation from -40°C to +85°C. To order, change the suffix from 'S–' to 'E–'. These devices are also available on special order for operation to +125°C. For applications not requiring quarter-step operation, but desire lower detent or running current, the similar UDN2916B/EB/LB may be preferred. DUAL FULL-BRIDGE PWM MOTOR DRIVER A2919SB OUT 1A OUT 2A E2 S E NS E 2 OUT 2 B G R OUND G R OUND I 02 Data Sheet 29319.21E 1 2 3 4 5 6 7 8 2 VBB 24 23 L OAD S UP P LY E1 S E NS E 1 OUT 1B I 01 G R OUND G R OUND I 11 P HAS E 1 V REF 1 RC 1 LOG IC S UP P LY 1 22 21 20 19 18 17 P WM 1 I 12 P HAS E 2 V REF 2 RC 2 9 9 10 11 12 θ2 P WM 2 θ1 16 15 14 V CC 13 Dwg. P P -005 ABSOLUTE MAXIMUM RATINGS at TJ ≤ 150°C Motor Supply Voltage, VBB ................... 45 V Output Current, IOUT (Peak, tw ≤ 20 µs) ........................ ±1.0 A (Continuous) .......................... ±750 mA Logic Supply Voltage, VCC .................. 7.0 V Logic Input Voltage Range, VIN ......................... - 0.3 V to VCC+0.3 V Output Emitter Voltage, VE .................. 1.5 V Package Power Dissipation, PD ....................................... See Graph Operating Temperature Range, TA ................................. -20°C to +85°C Storage Temperature Range, TS ............................... - 55°C to +150°C Output current rating may be limited by duty cycle, ambient temperature, and heat sinking. Under any set of conditions, do not exceed the specified peak current rating or a junction temperature of +150°C. FEATURES ■ ■ ■ ■ ■ ■ ■ 750 mA Continuous Output Current 45 V Output Sustaining Voltage Internal Clamp Diodes Internal PWM Current Control Low Output Saturation Voltage Internal Thermal Shutdown Circuitry Half- or Quarter-Step Operation of Bipolar Stepper Motors 2919 DUAL FULL-BRIDGE MOTOR DRIVER Selection Guide Part Number Pb-free1 RθJA (°C/W) 40 55 RθJT (°C/W) 6.0 6.0 Package Packing Ambient Temperature (°C) –20 to 85 –20 to 85 A2919SLB-T A2919SLBTR-T 1 Yes Yes 24-Lead SOIC 24-Lead SOIC 31 per tube 1000 per reel Pb-based variants are being phased out of the product line. The variants cited in this footnote are in production but have been determined to be LAST TIME BUY. This classification indicates that sale of this device is currently restricted to existing customer applications. The variants should not be purchased for new design applications because obsolescence in the near future is probable. Samples are no longer available. Status change : October 31, 2006. Deadline for receipt of LAST TIME BUY orders: April 27, 2007. These variants include: A2919SB, A2919SLB and A2919SLBTR. 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 2919 DUAL FULL-BRIDGE MOTOR DRIVER A2919SLB ALLOWABLE PACKAGE POWER DISSIPATION IN WATTS 5 RθJT = 6.0°C/W I 02 1 PWM 2 24 23 22 2 21 20 19 VBB LOAD SUPPLY OUT 2B SENSE 2 E2 OUT 2A GROUND GROUND OUT 1A E1 SENSE 1 OUT 1B I 12 PHASE 2 V REF 2 RC 2 GROUND GROUND LOGIC SUPPLY RC 1 V REF 1 PHASE 1 I 11 2 3 4 5 6 7 8 9 9 V CC θ2 4 3 SUFFIX 'B', R θJA = 40°C/W 2 18 17 16 1 15 1 SUFFIX 'LB', R θJA = 55°C/W 0 25 50 75 100 TEMPERATURE IN °C 125 150 Dwg. GP-049A 10 PWM 1 11 12 θ1 14 13 TRUTH TABLE I 01 PHASE Dwg. PP-047 OUTA H L OUTB L H H L PWM CURRENT-CONTROL CIRCUITRY 'B' PACKAGE, CHANNEL 1 PIN NUMBERS SHOWN. V BB 24 OUT B 1 21 OUT A V REF 15 60 kΩ ÷10 120 kΩ I 0 20 I 1 17 42 kΩ RS 23 E SENSE – 22 + ONE SHOT 14 RC SOURCE DISABLE RC CC RT CT Dwg. EP-007-3 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 W Copyright © 1994 Allegro MicroSystems, Inc. 2919 DUAL FULL-BRIDGE MOTOR DRIVER ELECTRICAL CHARACTERISTICS at TA = +25°C, TJ ≤ 150°C, VBB = 45 V, VCC = 4.75 V to 5.25 V, VREF = 5.0 V (unless otherwise noted). Limits Characteristic Output Drivers (OUTA or OUTB) Motor Supply Range Output Leakage Current VBB ICEX Operating VOUT = VBB VOUT = 0 Output Sustaining Voltage Output Saturation Voltage VCE(sus) VCE(SAT) IOUT = ± 750 mA, L = 3.0 mH Sink Driver, IOUT = +500 mA Sink Driver, IOUT = +750 mA Source Driver, IOUT = -500 mA Source Driver, IOUT = -750 mA Clamp Diode Leakage Current Clamp Diode Forward Voltage Driver Supply Current IR VF IBB(ON) IBB(OFF) VR = 45 V IF = 750 mA Both Bridges ON, No Load Both Bridges OFF 10 — — 45 + VF — — — — — — — — — < 1.0