LV8741V-TLM-E

LV8741V Bi-CMOS IC PWM Current Control Stepper Motor Driver www.onsemi.com Overview The LV8741V is a 2-channel H-bridge driver IC that can switch a stepper motor driver, which is capable of micro-step drive and supports Quarter-step excitation, and two channels of a brushed motor driver, which supports forward, reverse, brake, and standby of a motor. It is ideally suited for driving brushed DC motors and stepper motors used in office equipment and amusement applications. Feature SSOP44K (275mil)  Single-channel PWM current control stepper motor driver (selectable with DC motor driver channel 2) incorporated.  BiCDMOS process IC  On resistance (upper side : 0.5 ; lower side : 0.5 ; total of upper and lower : 1.0 ; Ta = 25C, IO = 1.5A)  Excitation mode can be set to Full-step, Half-step full torque, Half-step or Quarter-step  Excitation step proceeds only by step signal input  Motor current selectable in four steps  IO max = 1.5A  Output short-circuit protection circuit (selectable from latch-type or auto reset-type) incorporated  Thermal shutdown circuit and power supply monitor circuit incorporated  Support control power supply VCC = 2.7V to 5.5V Typical Applications  Stepper/Brush DC Motors  Computing & Peripherals, Industrial  Printers, Inkjet Printer, Multi-Function Printer  Flatbed Scanner, Document Scanner  Slot Machine, Vending Machine, Cash Machine ORDERING INFORMATION See detailed ordering and shipping information on page 28 of this data sheet. © Semiconductor Components Industries, LLC, 2015 June 2015 - Rev. 2 1 Publication Order Number : LV8741V/D LV8741V Specifications Absolute Maximum Ratings at Ta = 25C Parameter Symbol Supply voltage 1 VM max Supply voltage 2 VCC max Conditions VM , VM1 , VM2 Output peak current IO peak tw  10ms, duty 20% , Per 1ch Output current IO max Per 1ch Logic input voltage VIN Ratings ST , OE , DM , MD1/DC11 , MD2/DC12 , Unit 38 V 6 V 1.75 A 1.5 A -0.3 to VCC+0.3 V FR/DC21 , STP/DC22 , RST , EMM , ATT1 , ATT2 EMO input voltage VEMO Allowable power dissipation 1 Pd max1 Independent IC Allowable power dissipation 2 Pd max2 * -0.3 to VCC+0.3 V 0.55 W 2.9 W Operating temperature Topr -20 to +85 C Storage temperature Tstg -55 to +150 C * Specified circuit board : 90901.7mm3 : glass epoxy printed circuit board with back mounting. Caution 1) Absolute maximum ratings represent the value which cannot be exceeded for any length of time. Caution 2) Even when the device is used within the range of absolute maximum ratings, as a result of continuous usage under high temperature, high current, high voltage, or drastic temperature change, the reliability of the IC may be degraded. Please contact us for the further details. Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality should not be assumed, damage may occur and reliability may be affected. Recommended Operating Conditions at Ta = 25C Parameter Symbol Supply voltage range 1 VM Supply voltage range 2 VCC VREF input voltage range VREF Logic voltage range VIN Conditions VM , VM1 , VM2 ST , OE , DM , MD1/DC11 , MD2/DC12 , Ratings Unit 9.5 to 35 V 2.7 to 5.5 V 0 to VCC-1.8 V 0 to VCC V FR/DC21 , STP/DC22 , RST , EMM , ATT1 , ATT2 Functional operation above the stresses listed in the Recommended Operating Ranges is not implied. Extended exposure to stresses beyond the Recommended Operating Ranges limits may affect device reliability. www.onsemi.com 2 LV8741V Electrical Characteristics at Ta = 25°C, VM = 24V, VCC = 5V, VREF = 1.5V Parameter Symbol Standby mode current drain 1 IMstn Current drain 1 IM Conditions Ratings min typ Unit max ST = ”L” , I(VM)+I(VM1)+I(VM2) 150 200 A ST = ”H”, OE = ”H”, no load 0.75 1 mA 110 160 A mA I(VM)+I(VM1)+I(VM2) Standby mode current drain 2 ICCstn ST = ”L” Current drain 2 ICC ST = ”H”, OE = ”H”, no load VCC low-voltage cutoff voltage VthVCC ST = ”H”, OE = ”H”, no load Low-voltage hysteresis voltage VthHIS Thermal shutdown temperature TSD Design guarantee 180 C Thermal hysteresis width TSD Design guarantee 40 C Output on-resistance Ronu IO = 1.5A, Upper-side on resistance 0.5 0.7  Rond IO = 1.5A, Lower-side on resistance 0.5 0.6  Output leakage current IOleak VM = 35V 50 A Diode forward voltage 1 VD1 ID = -1.0A 1 1.3 V Diode forward voltage 2 VD2 ID = -1.5A Logic pin input current IINL ST , OE , DM , MD1/DC11 , MD2/DC12 , 2.5 3 2.2 2.35 2.5 V 100 150 200 mV 1.1 1.5 V 3 8 15 A ATT2 ,VIN = 0.8V VIN = 5V 30 50 70 A 2.0 VCC V 0 0.8 V 0.5 0.515 V FR/DC21 , STP/DC22 , RST , EMM , ATT1 , IINH Logic input High VINh ST , OE , DM , MD1/DC11 , MD2/DC12 , voltage Low VINLl FR/DC21 , STP/DC22 , RST , EMM , ATT1 , Current Quarter step Vtdac0_W Step 0(When initialized : channel 1 selection resolution reference voltage level Half step Vtdac1_W Step 1 (Initial state+1) 0.485 0.5 0.515 V Vtdac2_W Step 2 (Initial state+2) 0.323 0.333 0.343 V Vtdac3_W Step 3 (Initial state+3) 0.155 0.167 0.179 V Vtdac0_H Step 0 (When initialized: channel 1 0.485 0.5 0.515 V comparator level) Vtdac2_H Step 2 (Initial state+1) 0.323 0.333 0.343 V Vtdac0_HF Step 0 (Initial state, channel 1 comparator 0.485 0.5 0.515 V level) resolution (full torque) 0.485 comparator level) resolution Half step ATT2 Vtdac2_HF Step 2 (Initial state+1) 0.485 0.5 0.515 V Vtdac2_F Step 2 0.485 0.5 0.515 V Chopping frequency Fchop RCHOP = 20k 45 62.5 75 Current setting reference voltage VRF00 ATT1 = L, ATT2 = L 0.485 0.5 0.515 V VRF01 ATT1 = H, ATT2 = L 0.323 0.333 0.343 V VRF10 ATT1 = L, ATT2 = H 0.237 0.25 0.263 V VRF11 ATT1 = H, ATT2 = H 0.155 0.167 0.179 Iref VREF = 1.5V VREG5 output voltage Vreg5 IO = -1mA VG output voltage VG Rise time tONG Full step resolution VREF pin input current kHz V A -0.5 Charge pump 4.5 5 5.5 V 28 28.7 29.8 V 0.5 ms 125 150 kHz 50 100 mV VG = 0.1F , Between CP1-CP2 0.1uF ST=”H”→VG = VM+4V Oscillator frequency Fosc RCHOP = 20k 90 Output short-circuit protection EMO pin saturation voltage Iemo = 1mA Product parametric performance is indicated in the Electrical Characteristics for the listed test conditions, unless otherwise noted. Product performance may not be indicated by the Electrical Characteristics if operated under different conditions. www.onsemi.com 3 LV8741V Package Dimensions unit : mm SSOP44K (275mil) Exposed Pad CASE 940AF ISSUE A www.onsemi.com 4 LV8741V 1.00 SOLDERING FOOTPRINT* (Unit: mm) 7.00 (3.5) (4.7) 0.65 0.32 *For additional information on our Pb−Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D. GENERIC MARKING DIAGRAM* XXXXXXXXXX YMDDD XXXXX = Specific Device Code Y = Year M = Month DDD = Additional Traceability Data www.onsemi.com 5 LV8741V 4.0 3.0 Pd max - Ta *1 With components mounted on the exposed die-pad board *2 With no components mounted on the exposed die-pad board Two-layer circuit board 1 *1 2.90 Two-layer circuit board 2 *2 2.0 2.05 1.51 1.07 1.0 0 -20 0 20 40 60 80 100 Substrate Specifications (Substrate recommended for operation of LV8741V) Size : 90mm × 90mm × 1.7mm (two-layer substrate [2S0P]) Material : Glass epoxy Copper wiring density : L1 = 90% / L2 = 95% L1 : Copper wiring pattern diagram L2 : Copper wiring pattern diagram Cautions 1) The data for the case with the Exposed Die-Pad substrate mounted shows the values when 95% or more of the Exposed Die-Pad is wet. 2) For the set design, employ the derating design with sufficient margin. Stresses to be derated include the voltage, current, junction temperature, power loss, and mechanical stresses such as vibration, impact, and tension. Accordingly, the design must ensure these stresses to be as low or small as possible. The guideline for ordinary derating is shown below : (1)Maximum value 80% or less for the voltage rating (2)Maximum value 80% or less for the current rating (3)Maximum value 80% or less for the temperature rating 3) After the set design, be sure to verify the design with the actual product. Confirm the solder joint state and verify also the reliability of solder joint for the Exposed Die-Pad, etc. Any void or deterioration, if observed in the solder joint of these parts, causes deteriorated thermal conduction, possibly resulting in thermal destruction of IC. www.onsemi.com 6 LV8741V Pin Assignment CP2 1 44 VM CP1 2 43 VG VCC 3 42 PGND VREG5 4 41 NC ATT2 5 40 GND ATT1 6 39 NC NC 7 38 NC EMO 8 37 OUT1A CEM 9 36 VM1 EMM 10 35 RF1 RCHOP 11 MONI 12 34 OUT1B LV8741V 33 OUT2A RST 13 32 VM2 STP/DC22 14 31 RF2 FR/DC21 15 30 OUT2B MD2/DC12 16 29 NC NC 17 28 NC MD1/DC11 18 27 GND DM 19 26 NC OE 20 25 NC ST 21 24 NC VREF 22 23 SGND Top view www.onsemi.com 7 MONI PGND VM www.onsemi.com 8 + GND VCC VREF VREG5 + - LVS TSD + - RCHOP Oscillation circuit Regulator ATT2 Attenuator (4 levels selectable) ST ATT1 Charge pump Output preamplifier stage RF1 OUT1B VM1 VM2 OUT2A RF2 DM EMM Current set (Full/Half/ Half full-torque/ Quarter) Current set (Full/Half/ Half full-torque/ Quarter) MD1/ MD2/ FR/ STP/ RST OE DC11 DC12 DC21 DC22 + Output control logic OUT2B + OUT1A Output preamplifier stage VG Output preamplifier stage CP1 Output preamplifier stage CP2 CEM EMO LV8741V Block Diagram LV8741V Pin Functions Pin No. Pin name Description 36 VM1 Channel 1 motor power supply pin 37 OUT1A Channel 1 OUTA output pin 34 OUT1B Channel 1 OUTB output pin 35 RF1 Channel 1 current-sense resistor connection pin 32 VM2 Channel 2 motor power supply connection pin 33 OUT2A Channel 2 OUTA output pin 30 OUT2B Channel 2 OUTB output pin 31 RF2 Channel 2 current-sense resistor connection pin 42 PGND Power system ground 12 MONI Position detection monitor pin 14 STP/DC22 STM STEP signal input pin/DCM2 output control input pin 22 VREF Constant current control reference voltage input pin 18 MD1/DC11 STM excitation mode switching pin/DCM1 output control input pin 16 MD2/DC12 STM excitation mode switching pin/DCM1 output control input pin 13 RST Reset signal input pin 20 OE Output enable signal input pin 15 FR/DC21 STM forward/reverse rotation signal input pin/DCM2 output control input pin 6 ATT1 Motor holding current switching pin 5 ATT2 Motor holding current switching pin 21 ST Chip enable pin 44 VM Motor power supply connection pin Logic power supply connection pin 3 VCC 23 GND Signal system ground 11 RCHOP Chopping frequency setting resistor connection pin 19 DM Drive mode (STM/DCM) switching pin 4 VREG5 Internal power supply capacitor connection pin 2 CP1 Charge pump capacitor connection pin 1 CP2 Charge pump capacitor connection pin 43 VG Charge pump capacitor connection pin 8 EMO Output short-circuit state warning output pin 10 EMM Overcurrent mode switching pin 9 CEM Pin to connect the output short-circuit state detection time setting capacitor 27,40 GND Ground 7, 17, 24, 25, 26, 28, NC No Connection (No internal connection to the IC) 29, 38, 39, 41 www.onsemi.com 9 LV8741V Equivalent Circuits Pin No. Pin 5 ATT2 6 ATT1 10 EMM 13 RST 14 STP/DC22 15 FR/DC21 16 MD2/DC12 18 MD1/DC11 19 DM 20 OE 21 ST Equivalent Circuit VCC 5kΩ 100kΩ GND 30 OUT2B 31 RF2 36 32 VM2 32 33 OUT2A 34 OUT1B 35 RF1 36 VM1 37 OUT1A 42 PGND VCC 37 33 34 30 35 GND 42 1 CP2 2 CP1 43 VG 44 VM 2 31 44 1 43 100Ω VREG5 GND Continued on next page. www.onsemi.com 10 LV8741V Continued from preceding page. Pin No. 22 Pin VREF Equivalent Circuit VCC 500Ω GND 4 VREG5 VM 2kΩ 78kΩ 26kΩ GND 12 MONI VCC 500Ω GND Continued on next page. www.onsemi.com 11 LV8741V Continued from preceding page. Pin No. 8 Pin Equivalent Circuit EMO VCC GND 9 CEM VCC 500Ω GND 11 RCHOP VCC GND 1kΩ www.onsemi.com 12 LV8741V Description of operation 1. Input Pin Function 1-1) Chip enable function This IC is switched between standby and operating mode by setting the ST pin. In standby mode, the IC is set to power-save mode and all logic is reset. In addition, the internal regulator circuit and charge pump circuit do not operate in standby mode. ST Mode Internal regulator Charge pump Low or Open Standby mode Standby Standby High Operating mode Operating Operating 1-2) Drive mode switching pin function The IC drive mode is switched by setting the DM pin. In STM mode, stepper motor channel 1 can be controlled by the CLK-IN input. In DCM mode, DC motor channel 2 or stepper motor channel 1 can be controlled by parallel input. Stepper motor control using parallel input is Full-step or Half-step full torque. DM Drive mode Application Low or Open STM mode Stepper motor channel 1 (CLK-IN) High DCM mode DC motor channel 2 or stepper motor channel 1 (parallel) 2.STM mode (DM = Low or Open) 2-1) STEP pin function Input Operating mode ST STP Low * Standby mode High Excitation step proceeds High Excitation step is kept 2-2) Excitation mode setting function MD1 MD2 Micro-step resolution (Excitation mode) Low Low High Low Initial position Channel 1 Channel 2 Full step (2 phase excitation) 100% -100% Half step (1-2 phase excitation) 100% 0% full torque Low High Half step (1-2 phase excitation) 100% 0% High High Quarter step 100% 0% (W1-2 phase excitation) This is the initial position of each excitation mode in the initial state after power-on and when the counter is reset. 2-3) Constant-current control reference voltage setting function ATT1 ATT2 Current setting reference voltage Low Low VREF/3100% High Low VREF/367% Low High VREF/350% High High VREF/333% The voltage input to the VREF pin can be switched to four-step settings as the reference voltage for setting the output current. This is effective for reducing power consumption when motor holding current is supplied. Set current value calculation method The reference voltage is set by the voltage applied to the VREF pin and the two inputs ATT1 and ATT2. The output current (output current at a constant-current drive current ratio of 100%) can be set from this reference voltage and the RF resistance value. IOUT = (VREF/3  Voltage setting ratio)/RF resistor www.onsemi.com 13 LV8741V (Example) When VREF = 0.66V, setting current ratio = 100% [(ATT1, ATT2) = (Low, Low)] and RF resistor = 0.22, the following output current flows : IOUT = 0.66V/3  100%/0.22 = 1A 2-4) Input Timming TstepH TstepL STEP Tdh Tds (md1 step) (step md1) MD1 Tdh Tds (md2 step) (step md2) MD2 Tdh Tds (fr step) (step fr) FR TstepH/TstepL : Clock H/L pulse width (min 500ns) Tds : Data set-up time (min 500ns) Tdh : Data hold time (min 500ns) 2-5) Blanking period If, when exercising PWM constant-current chopping control over the motor current, the mode is switched from decay to charge, the recovery current of the parasitic diode may flow to the current sensing resistance, causing noise to be carried on the current sensing resistance pin, and this may result in erroneous detection. To prevent this erroneous detection, a blanking period is provided to prevent the noise occurring during mode switching from being received. During this period, the mode is not switched from charge to decay even if noise is carried on the current sensing resistance pin. In the blanking time for this IC, it is fixed one sixteenth of chopping cycle. 2-6) Reset function RST Operating mode High Normal operation Low Reset state RESET RST STEP MONI 1ch output 0% 2ch output Initial state When the RST pin is set Low, the output excitation position is forced to the initial state, and the MONI output also goes Low. When RST is set High after that, the excitation position proceeds to the next STEP input. www.onsemi.com 14 LV8741V 2-7) Output enable function OE Operating mode Low Output OFF High Output ON OE Power save mode STEP MONI 1ch output 0% 2ch output Output is high-impedance When the OE pin is set Low, the output is forced OFF and goes to high impedance. However, the internal logic circuits are operating, so the excitation position proceeds when the STEP signal is input. Therefore, when OE is returned to High, the output level conforms to the excitation position proceeded by the STEP input. 2-8) Forward/reverse switching function FR Operating mode Low Clockwise (CW) High Counter-clockwise (CCW) FR CW mode CCW mode CW mode STEP Excitation position (1) (2) (3) (4) (5) (6) (5) (4) (3) (4) (5) 1ch output 2ch output The internal D/A converter proceeds by one bit at the rising edge of the input STEP pulse. In addition, CW and CCW mode are switched by setting the FR pin. In CW mode, the channel 2 current phase is delayed by 90° relative to the channel 1 current. In CCW mode, the channel 2 current phase is advanced by 90° relative to the channel 1 current. www.onsemi.com 15 LV8741V 2-9) Setting the chopping frequency For constant-current control, chopping operation is made with the frequency determined by the external resistor (connected to the RCHOP pin). The chopping frequency to be set with the resistance connected to the RCHOP pin (pin 11) is as shown below. Chopping frequency settings (reference data) 100 Fchop – kHz 80 60 40 20 0 0 10 20 30 RCHOP – kΩ www.onsemi.com 16 40 50 60 PCA01883 LV8741V 2-10) Output current vector locus (one step is normalized to 90 degrees) 100.0 θ2 (Full-step/ Half-step full torque) θ4 Channel 1 phase current ratio (%) θ3 66.7 θ2 33.3 θ1 θ0 0.0 0.0 33.3 66.7 100.0 Channel 2 current ratio (%) Setting current ration in each micro-step mode STEP Quarter-step (%) Channel 1 Half-step (%) Channel 2 Channel 1 0 0 100 1 33.3 100 2 66.7 66.7 3 100 33.3 4 100 0 Half-step full torque (%) Channel 2 Channel 1 Full-step (%) Channel 2 Channel 1 0 100 0 100 66.7 66.7 100 100 100 0 100 0 www.onsemi.com 17 100 Channel 2 100 LV8741V 2-11) Examples of current waveform in each micro-step mode Full step (CW mode) STEP MONI (%) 100 l1 0 -100 (%) 100 I2 0 -100 Half step full torque (CW mode) STEP MONI (%) 100 I1 0 -100 (%) 100 I2 0 -100 www.onsemi.com 18 LV8741V Half step (CW mode) STEP MONI (%) 100 I1 0 -100 (%) 100 I2 0 -100 Quarter step (CW mode) STEP MONI (%) 100 I1 0 -100 (%) 100 I2 0 -100 www.onsemi.com 19 LV8741V 2-12) Current control operation specification (Sine wave increasing direction) STEP Set current Set current Coil current Forced CHARGE section fchop Current mode CHARGE SLOW FAST CHARGE SLOW FAST (Sine wave decreasing direction) STEP Set current Coil current Forced CHARGE section Set current fchop Current mode CHARGE SLOW Forced CHARGE section FAST FAST CHARGE SLOW In each current mode, the operation sequence is as described below :  At rise of chopping frequency, the CHARGE mode begins.(The section in which the CHARGE mode is forced regardless of the magnitude of the coil current (ICOIL) and set current (IREF) exists for 1/16 of one chopping cycle.)  The coil current (ICOIL) and set current (IREF) are compared in this forced CHARGE section. When (ICOIL