L6219DSTR-T

L6219DS Dual Full-Bridge PWM Motor Driver Features and Benefits Description ▪ Interchangeable with SGS L6219DS ▪ 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 ▪ Similar to Dual PBL3717, UC3770 The L6219DS motor driver is 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). Package: 24 pin SOICW (suffix LB) 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. For PWM current control, the maximum output current is determined by user selection of a reference voltage and sensing resistor. Two logic-level inputs select output current limits of 0, 33, 67, or 100% of the maximum level. A PHASE input to each bridge determines load current direction. The L6219DS is supplied in a 24-pin surface-mountable SOIC, with 4 internally-fused leads for maximum package power dissipation in the smallest possible construction. It is lead (Pb) free with 100% matte tin leadframe plating. Not to scale Typical Application STEPPER MOTOR V BB VBB 1 24 RS RC FROM μP 4 5 20 6 19 7 18 8 17 56 k7 RT Q2 PWM 2 10 REF CC 21 C 99 V 22 2 PWM 1 C RC 1 3 + RS 23 2 Q1 16 15 V REF 14 11 12 820 pF CT FROM μP 820 pF VCC 13 +5 V C T 56 k7 RT Dwg. EP-008B1 29319.43I L6219DS Dual Full-Bridge PWM Motor Driver Selection Guide L6219DSTR-T Operating Ambient Temperature Range TA (°C) Packing Part Number 1000 pieces per reel –20 to 85 Absolute Maximum Ratings Characteristic Symbol Notes Rating Units Motor Supply Voltage VBB 45 V Logic Supply Voltage VCC 7.0 V Logic Input Voltage Range VIN –0.3 to VCC+0.3 V Output Emitter Voltage VSENSE 1.5 V Output Current, Peak IOUT(pk) 1.0 A 750 mA Output Current, Continuous 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. IOUT Operating Ambient Temperature TA –20 to 85 ºC Maximum Junction Temperature TJ(max) 150 ºC Tstg –55 to 150 ºC Storage Temperature Range S Thermal Characteristics Characteristic Package Thermal Resistance Symbol Test Conditions* RθJA Value Units 1-layer PCB with copper limited to solder pads 77 ºC/W 1-layer PCB with 3.57 in.2 of copper area 49 ºC/W 6 ºC/W RθJT *Additional thermal information available on the Allegro website. 2.5 R θJT = 6°C/W 2.0 1.5 R θJA= 49°C/W 1.0 R θJA= 77°C/W 0.5 0 25 50 75 100 TEMPERATURE in °C 125 150 Dwg. GP-019C Allegro MicroSystems, Inc. 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com 2 L6219DS Dual Full-Bridge PWM Motor Driver PWM Current-Control Circuitry Phase Truth Table VBB CHANNEL 1 TERMINAL NUMBERS SHOWN. 24 PHASE OUTA H H L L L H OUTB OUT B 1 21 OUT A V REF 15 20 k7 23 w10 40 k7 SENSE COMP IN – ONE SHOT + 22 RC 10 k7 I 0 20 14 CC RS I 1 17 RT SOURCE DISABLE RC CT Dwg. EP-007-5 Pin-Out Diagram OUT 1A 1 OUT 2A 2 SENSE 2 VBB 1 3 2 24 LOAD SUPPLY 23 SENSE 1 22 COMP IN 1 21 OUT 1B OUT 2B 5 20 I 01 GROUND 6 19 GROUND GROUND 7 18 GROUND I 02 8 17 I11 I12 9 16 PHASE 1 15 V REF 1 14 RC 1 13 LOGIC SUPPLY PHASE 2 10 V REF 2 11 RC 2 12 Q 2 PWM 1 4 PWM 2 COMP IN 2 Q1 V CC Dwg. PP-005-3 Allegro MicroSystems, Inc. 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com Copyright © 1998, 2003 Allegro MicroSystems, Inc. 3 L6219DS Dual Full-Bridge PWM 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 Symbol Test Conditions Min. Typ. Max. Units 10 — 45 V VOUT = VBB — < 1.0 50 μA VOUT = 0 —