E-L6219DSA

L6219DSA Stepper motor driver Datasheet − production data Features ■ Drives both windings of a bipolar stepper motor ■ Output current up to 750 mA for 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 SO24 Description The L6219DSA is a bipolar monolithic integrated circuit intended to control and drive both windings of a bipolar stepper motor or bidirectionally control two DC motors. With only a few external components, the L6219DSA controls and drives the circuit for LSTTL or microprocessor-controlled stepper motor systems. The power stage is a dual full bridge sustaining 46 V and including four diodes for current recirculation. Table 1. 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. A wide range of current control from 750 mA (each bridge) is permitted by two logic inputs and an external voltage reference. A phase input to each bridge determines the load current direction. Thermal protection circuitry disables the outputs if the chip temperature exceeds safe operating limits. Device summary Order code Package Packing E-L6219DSA SO24 Tube E-L6219DSATR SO24 Tape and reel October 2012 This is information on a product in full production. Doc ID 4970 Rev 4 1/12 www.st.com 12 Contents L6219DSA Contents 1 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2.1 Input logic (I0 and I1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2.2 Phase . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2.3 Current sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2.4 Single-pulse generator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 2.5 Output stage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 2.6 VS, VSS, VRef . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 3 Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 4 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 5 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 2/12 Doc ID 4970 Rev 4 L6219DSA 1 Block diagram Block diagram Figure 1. Block diagram AM15158v1 Table 2. Absolute maximum ratings Parameter Description Value Unit Vs Supply voltage 50 V IO Output current (peak) ±1 A IO Output current (continuous) ±0.75 A Vss Logic supply voltage 7 V Vin Logic input voltage range -0.3 to +7 V Vsense Sense output voltage 1.5 V Tj Junction temperature +150 °C Top Operating temperature range -40 to +125 °C Tstg Storage temperature range -55 to +150 °C Doc ID 4970 Rev 4 3/12 Block diagram L6219DSA Figure 2. SO24 pin connection (top view) AM15159v1 Table 3. Pin # Name 1, 21 Output of bridge 1 3, 23 Sense resistor Connection to lower emitters of output stage for insertion of current sense resistor 4, 22 Comparator input 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. 2, 5 Output of bridge 2 Output connection. The output stage is a H bridge formed by four transistors and four diodes suitable for switching applications. 6, 7, 18, 19 Ground Ground connection. They also conduct heat from die to printed circuit copper 8, 20 Input 0 See input 1 (pins 9, 17) Input 1 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 Section 2: Functional description. 10, 16 Phase These TTL-compatible logic inputs set 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 a good noise immunity and a delay circuit prevents output stage short-circuits during switching. 11, 15 Reference voltage 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) 9, 17 4/12 Pin functions Description See pins 2, 5 Doc ID 4970 Rev 4 L6219DSA Block diagram Table 3. Pin # 12, 14 13 24 Note: Pin functions (continued) Name Description RC 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) VSS - Logic supply Supply voltage input for logic circuitry VS - Load supply Supply voltage input for the output stages 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 AM15160v1 Table 4. Thermal data Parameter Rthj-case Rthj-amb Description Thermal resistance junction-case max. Thermal resistance junction-ambient max. PDIP Unit 18 °C/W 75(1) °C/W 1. With minimized copper area. Doc ID 4970 Rev 4 5/12 Block diagram L6219DSA Table 5. 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. Parameter Description Test condition Min. Typ. Max. Unit 10 - 46 V VS = 52 V VOUT = 50 V VS = 52 V VOUT = 1 V - 200 -200 μA μA Sink driver, IOUT= +500 mA Sink driver, IOUT = +750 mA Source driver, IOUT = -500 mA Source driver, IOUT = -750 mA - - 0.75 1.15 1.6 1.8 V V V V Output drivers (OUTA or OUTB) VS ICEX VCE(sat) Motor supply range Output leakage current Output saturation voltage VF Clamp diode forward voltage High stage IF =750 mA Low stage IF =750 mA - - 1.7 1.6 V V IS(on) Driver supply current Both bridges ON, no load - - 17 mA IS(off) Driver supply current Both bridges OFF - - 12 mA Control logic VIN(H) Input voltage All inputs 2.4 - - V VIN(L) Input voltage All inputs - - 0.8 V IIN(H) Input current VIN = 2.4 V -