L6219R_06

L6219R Stepper motor driver Features ■ ■ ■ ■ ■ ■ ■ ■ ■ Able to drive both windings of bipolar stepper motor Output current up to 500mA each winding Wide voltage range 4.5V to 10V HAlf-step, full-step and microstepp-ing mode Built-in protection diodes Internal pwm current control Low output saturation voltage Designed for unstabilized motor supply voltage Internal thermal shutdown A cross conduction protection is provided to avoid simultaneous cross conduction during switching current direction. An internal pulse-width-modulation (PWM) controls the output current to 500mA with peak start-up current up to 1A. Wide range of current control from 500mA (each bridge) is permitted by means of two logic inputs and an external voltage reference. A phase input to each bridge determines the load current direction. A thermal protection circuitry disables the outputs if the chip temperature exceeds safe operating limits. SO-24 (20+2+2) Description The L6219R is a bipolar monolithic integrated circuits intended to control and drive both winding of a bipolar stepper motor or bidirectionally control two DC motors.The L6219R with a few external components form a complete control and drive circuit for LS-TTL or microprocessor controlled stepper motor system.The power stage is a dual full bridge capable of sustaining 10V and including four diodes for current recirculation. Order codes Part number L6219R L6219R013TR E-L6219R(1) E-L6219R013TR (1) 1. Lead free package (ECOPACK®) see Chapter 5. Package SO-24 SO-24 SO-24 SO-24 Packing Tube Tape & reel Tube Tape & reel June 2006 Rev 3 1/16 www.st.com 1 Table of contents L6219R Table of contents 1 2 Block diagram & pins description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2.1 2.2 2.3 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 3 Functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 3.1 3.2 3.3 3.4 3.5 3.6 Input Logic (I0 and I1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Phase . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Current Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Single-pulse Generator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Output Stage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 VS, VSS, VRef . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 4 Application informations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 4.1 Electrical characteristics curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 5 6 Package informations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 2/16 L6219R List of tables List of tables Table 1. Table 2. Table 3. Table 4. Table 5. Table 6. Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Thermal data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Input logic current level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 3/16 List of figures L6219R List of figures Figure 1. Figure 2. Figure 3. Figure 4. Figure 5. Figure 6. Figure 7. Figure 8. Figure 9. Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Pin connection (Top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Windings of a bipolar stepper motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Principle Operating Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Typical Application Circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Max output current versus supply voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Maximum reference voltages vs. supply voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Maximum output current vs. supply voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 SO-24 Mechanical Data & Package Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 4/16 L6219R Block diagram & pins description 1 Block diagram & pins description Figure 1. Block diagram Figure 2. Pin connection (Top view) Table 1. Pin # 1;2 3;23 Pin description Name OUTPUT A SENSE RESISTOR See pins 5;21 Connection to Lower Emitters of Output Stage for Insertion of Current Sense Resistor Description 4;22 Input connected to the comparators. The voltage across the sense resistor is feedback to this input throught the low pass filter RC CC. The COMPARATOR higher power transistors are disabled when the sense voltage exceeds INPUT the reference voltage of the selected comparator. When this occurs the current decays for a time set by RT CT (toff = 1.1 RT CT). See fig. 4. OUTPUT B GROUND Output Connection. The output stage is a "H" bridge formed by four transistors and four diodes suitable for switching applications. See pins 7;18 5;21 6;19 5/16 Block diagram & pins description Table 1. Pin # 7;18 8;20 L6219R Pin description (continued) Name GROUND INPUT 0 Description Ground Connection. With pins 6 and 19 also conducts heat from die to printed circuit copper. See INPUT 1 (pins 9;17) These pins and pins 8;20 (INPUT 0) are logic inputs which select the outputs of the comparators to set the current level. Current also depends on the sensing resistor and reference voltage. See Funcional Description. This TTL-compatible logic inputs sets the direction of current flow through the load. A high level causes current to flow from OUTPUT A (source) to OUTPUT B (sink). A schmitt trigger on this input provides good noise immunity and a delay circuit prevents output stage short circuits during switching. A voltage applied to this pin sets the reference voltage of the comparators, this determining the output current (also thus depending on Rs and the two inputs INPUT 0 and INPUT 1). A parallel RC network connected to this pin sets the OFF time of the higher power transistors. The pulse generator is a monostable triggered by the output of the comparators (toff = 1.1 RT CT). Supply Voltage Input for Logic Circuitry Supply Voltage Input for the Output Stages. 9;17 INPUT 1 10;16 PHASE 11;15 REFERENCE VOLTAGE 12;14 RC Vss - LOGIC SUPPLY Vs - LOAD SUPPLY 13 24 Note: ESD on GND, Vs, Vss, OUT 1A and OUT 2A is guaranteed up to 1.5KV (Human Body Model, 1500W, 100pF). 6/16 L6219R Electrical specifications 2 2.1 Electrical specifications Absolute maximum ratings Table 2. Symbol VS Io Io VSS VIN Vsense TJ Top Tstg Supply Voltage Output Current (peak) Output Current (continuous) Logic Supply Voltage Logic Input Voltage Range Sense Output Voltage Junction Temperature Operating Temperature Range Storage Temperature Range Absolute maximum ratings Parameter Value 30 ±1 ±0.5 7 -0.3 to VSS 1.5 +150 -20 to +85 -55 to +150 Unit V A A V V V °C °C °C 2.2 Thermal data Table 3. Symbol Rthj-case Rthj-amb Thermal data Description Thermal Resistance Junction-case Thermal Resistance Junction-ambient Max. Max. Value 18 75 (*) Unit °C/W °C/W (*) With minimized copper area. 2.3 Table 4. Electrical characteristics Electrical Characteristics (Tj = 25°C, VS = 4.5V, VSS = 4.75V to 5.25V, VREF = 2V; unless otherwise specified) See Figure 5. Parameter Test Condition Min. Typ. Max. Unit . Symbol OUTPUT DRIVERS (OUTA or OUTB) VS ICEX Motor Supply Range Output Leakage Current *) Vs = 30V; VOUT = Vs; Vs = 30V; VOUT = 0 Sink Driver, IOUT= +300mA Sink Driver, IOUT = +500mA Source Driver, IOUT = -300mA Source Driver, IOUT = -500mA 4.5 -50