L6219DSA_08

L6219DSA Stepper motor driver for automotive range Features ■ ■ ■ ■ ■ ■ ■ ■ ■ Able to drive both windings of bipolar stepper motor Output current up to 750 mA each winding Wide voltage range: 10 V to 46 V Half-step, full-step and microstepping 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 750 mA with peak startup current up to 1 A. Wide range of current control from 750 mA (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. SO24 (20+2+2) Description The L6219DSA 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 L6219DSA with a few external components form a complete control and drive circuit for LSTTL or microprocessor controlled stepper motor system. The power stage is a dual full bridge capable of sustaining 46 V and including four diodes for current recirculation. Table 1. Device summary Order code E-L6219DSA E-L6219DSATR Package SO24 SO24 Packing Tube Tape & reel April 2008 Rev 2 1/15 www.st.com 1 Contents L6219DSA Contents 1 2 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2.1 2.2 2.3 2.4 2.5 2.6 Input logic (I0 and I1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Phase . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Current sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Single-pulse generator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Output stage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 VS, VSS, VRef . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 3 4 5 Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 2/15 L6219DSA List of tables List of tables Table 1. Table 2. Table 3. Table 4. Table 5. Table 6. Table 7. Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Absolute maximum rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Pin functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Thermal data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Electrical characteristcs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Current levels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 3/15 List of figures L6219DSA List of figures Figure 1. Figure 2. Figure 3. Figure 4. Figure 5. Figure 6. Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 SO24 pins connection (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Timing diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Principle operating sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Typical application circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 SO24 mechanical data and package dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 4/15 L6219DSA Block diagram 1 Block diagram Figure 1. Block diagram Table 2. Absolute maximum rating Description 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 Value 50 ±1 ±0.75 7 -0.3 to +7 1.5 +150 -40 to +125 -55 to +150 Unit V A A V V V °C °C °C Parameter Vs IO IO Vss Vin Vsense Tj Top Tstg 5/15 Block diagram Figure 2. SO24 pins connection (top view) L6219DSA Table 3. Pin # 1, 21 3, 23 Pin functions Name Output of bridge 1 Sense resistor See pins 2, 5 Connection to lower emitters of output stage for insertion of current sense resistor Input connected to the comparators. The voltage across the sense resistor is feedback to this input throught the low pass filter RC CC. The higher power transistors are disabled when the sense voltage exceeds 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 Figure 3. Output Connection. The output stage is a "H" bridge formed by four transistors and four diodes suitable for switching applications Ground connection, they 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 functional description Description 4, 22 Comparator input 2, 5 Output of bridge 2 6, 7, 18, 19 8, 20 Ground Input 0 9, 17 Input 1 6/15 L6219DSA Table 3. Pin # Block diagram Pin functions (continued) Name 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) 10, 16 Phase 11, 15 Reference voltage 12, 14 RC 13 24 VSS - Logic supply Supply voltage input for logic circuitry VS - Load supply Supply voltage input for the output stages Note: ESD on GND, VS, VSS, OUT 1 A and OUT 2 A is guaranteed up to 1.5 KV (human body model, 1500 W, 100 pF). Figure 3. Timing diagram Table 4. Parameter Rthj-case Rthj-amb Thermal data Description Thermal resistance junction-case Thermal resistance junction-ambient max. max. PDIP 18 75 (1) Unit °C/W °C/W 1. With minimized copper area. 7/15 Block diagram Table 5. L6219DSA Electrical characteristcs (Tj = 40 °C to 125 °C, VS = 46 V, VSS = 4.75 V to 5.25 V, VREF = 5 V; unless otherwise specified) See Figure 5 Description Test condition Min. Typ. Max. Unit Parameter Output drivers (OUTA or OUTB) VS ICEX Motor supply range Output leakage current VS = 52 V VOUT = 50 V VS = 52 V VOUT = 1 V Sink driver, IOUT= +500 mA Sink driver, IOUT = +750 mA Source driver, IOUT = -500 mA Source driver, IOUT = -750 mA High stage IF =750 mA Low stage IF =750 mA Both bridges ON, no load Both bridges OFF 10 -200 46 200 0.75 1.15 1.6 1.8 1.7 1.6 17 12 V μA μA V V V V V V mA mA VCE(sat) Output saturation voltage VF IS(on) IS(off) Clamp diode forward voltage Driver supply current Driver supply current Control logic VIN(H) VIN(L) IIN(H) IIN(L) VREF ISS(ON) ISS(OFF) Input voltage Input voltage Input current Input current Reference voltage Total logic supply current Total logic supply current All inputs All inputs VIN = 2.4 V VIN = 0.84 V Operating Io = I1 = 0.8 V, no load Io = I1 = 2.4 V, no load 2.4 1.5