Ordering number : ENA2056 Bi-CMOS LSI LV8771VH PWM Constant-Current Control Stepping Motor Driver Overview The LV8771VH is a PWM current control stepping motor driver. It is ideally suited for driving stepping motors used in office equipment and amusement applications. Features • 1 channel PWM current control stepping motor driver. • IO max = 1.5A • Output on-resistance (High side : 0.6Ω ; Low side : 0.4Ω ; total : 1.0Ω ; Ta = 25°C, IO = 1.5A). • Micro step mode can be set to full-step, half-step (full torque), half-step, and quarter-step mode. • Built-in thermal shutdown circuit. • No control power supply necessary. Specifications Absolute Maximum Ratings at Ta = 25°C Parameter Symbol Conditions Ratings Unit Supply voltage VM max Output peak current IO peak Output current IO max Allowable power dissipation Pd max Logic input voltage VIN max VREF input voltage VREF max -0.3 to +6 V Operating temperature Topr -20 to +85 °C Storage temperature Tstg -55 to +150 °C t ≤ 10ms, ON-duty ≤ 20% * 36 V 1.75 A 1.5 A 3.0 W -0.3 to +6 V * Specified circuit board : 90.0mm×90.0mm×1.6mm, glass epoxy board. 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. Any and all SANYO Semiconductor Co.,Ltd. products described or contained herein are, with regard to "standard application", intended for the use as general electronics equipment. The products mentioned herein shall not be intended for use for any "special application" (medical equipment whose purpose is to sustain life, aerospace instrument, nuclear control device, burning appliances, transportation machine, traffic signal system, safety equipment etc.) that shall require extremely high level of reliability and can directly threaten human lives in case of failure or malfunction of the product or may cause harm to human bodies, nor shall they grant any guarantee thereof. If you should intend to use our products for new introduction or other application different from current conditions on the usage of automotive device, communication device, office equipment, industrial equipment etc. , please consult with us about usage condition (temperature, operation time etc.) prior to the intended use. If there is no consultation or inquiry before the intended use, our customer shall be solely responsible for the use. Specifications of any and all SANYO Semiconductor Co.,Ltd. products described or contained herein stipulate the performance, characteristics, and functions of the described products in the independent state, and are not guarantees of the performance, characteristics, and functions of the described products as mounted in the customer's products or equipment. To verify symptoms and states that cannot be evaluated in an independent device, the customer should always evaluate and test devices mounted in the customer ' s products or equipment. 52312 SY 20120215-S00005 No.A2056-1/13 LV8771VH Recommendation Operating Conditions at Ta = 25°C Parameter Symbol Conditions Ratings Unit Supply voltage range VM 9 to 32 V Logic input voltage VIN 0 to 5.5 V VREF input voltage range VREF 0 to 3 V Electrical Characteristics at Ta = 25°C, VM = 24V, VREF = 1.5V Parameter Symbol Ratings Conditions min typ Unit max 100 150 μA 2 3 mA Standby mode current drain IMstn ST = “L” Current drain IM ST = “H”, I01 = I11 = I02 = I12 = “L”, with no VREG5 output voltage Vreg5 Ireg5 = -1mA 4.7 5 5.3 V Thermal shutdown temperature TSD Design guarantee 150 180 210 °C Thermal hysteresis width ΔTSD Design guarantee 40 Ronu IO = 1.5A, Upper-side on resistance 0.6 0.78 0.4 0.52 Ω 50 μA 1.4 V 0.8 V 12 μA load °C Motor driver Output on resistance Ω Rond IO = 1.5A, Lower-side on resistance Output leakage current IOleak VM = 36V Diode forward voltage VD Logic high-level input voltage VINH Logic low-level input voltage VINL Logic pin input current IINL IINH VIN = 5V 30 50 70 μA Current setting comparator Vtdac11 I01(02) = “H”, I11(12) = “H” 0.29 0.30 0.31 V threshold voltage Vtdac01 I01(02) = “L”, I11(12) = “H” 0.20 0.21 0.22 V Vtdac10 I01(02) = “H”, I11(12) = “L” 0.11 0.12 0.13 V Fchop1 FC = “L” 24.8 31.0 37.2 kHz Fchop2 FC = “H” 49.6 62.0 74.4 kHz Iref VREF = 1.5V -0.5 Chopping frequency VREF pin input current 1.1 2.0 VIN = 0.8V V 4 8 μA Charge pump VG output voltage VG Rise time tONG 28 Oscillator frequency Fosc VG = 0.1μF 100 28.7 29.8 V 200 500 μS 125 150 kHz Package Dimensions unit : mm (typ) 3222A 15.0 0.5 5.6 7.6 15 14 1 2.0 2.7 0.1 (1.5) 1.7max (0.7) 0.2 0.3 SANYO : HSOP28(275mil) Allowable power dissipation, Pd max - W 28 0.8 Pd max – Ta 4.0 3.0 2.0 1.56 1.0 0 – 20 0 20 40 60 80 100 Ambient temperature, Ta - C No.A2056-2/13 PGND VM GND VREF VREG5 + - TSD + Oscillation circuit Regulator ST Charge pump + OUT1A OUT1B VM1 Current selection ( Quartoe/Half/Full) Output preamplifier stage RF1 VM2 OUT2A RF2 + Current selection ( Quartoe/Half/Full) OUT2B FC I01 I11 PH1 I12 I02 PH2 Output control logic Output preamplifier stage VG Output preamplifier stage CP1 Output preamplifier stage CP2 LV8771VH Block Diagram No.A2056-3/13 LV8771VH Pin Assignment SGND 1 28 VREF NC 2 27 FC OUT2B 3 26 ST VM2 4 25 PH2 PGND2 5 24 I02 RF2 6 23 I12 OUT2A 7 22 PH1 LV8771VH OUT1B 8 21 I01 RF1 9 20 I11 PGND1 10 19 VREG5 VM1 11 18 CP1 OUT1A 12 17 NC NC 13 16 CP2 VM 14 15 VG Top view No.A2056-4/13 LV8771VH Pin Functions Pin No. Pin Name Pin Functtion 22 PH1 Channel 1 forward/reverse rotation pin. 21 I01 Channel 1 output control input pin . 20 I11 Channel 1 output control input pin . 25 PH2 Channel 2 forward/reverse rotation pin. 24 I02 Channel 2 output control input pin . 23 I12 Channel 2 output control input pin . 27 FC Chopping frequency switching pin. Equivalent Circuit VREG5 GND 26 ST Chip enable pin. VREG5 GND 8 OUT1B Channel 1 OUTB output pin. 9 RF1 Channel 1 current-sense resistor connection pin. 10 PGND1 Power system ground pin 1. 11 VM1 Channel 1 motor power supply connection pin. 12 OUT1A Channel 1 OUTA output pin. 3 OUT2B Channel 2 OUTB output pin. 4 VM2 Channel 2 current-sense resistor connection pin. 5 PGND2 Power system ground pin 2. 6 RF2 Channel 2 motor power supply connection pin. 7 OUT2A Channel 2 OUTA output pin. 11 4 8 3 12 7 10 5 9 6 GND 2, 13 , 17 NC No Connection (No internal connection to the IC) Continued on next page. No.A2056-5/13 LV8771VH Continued from preceding page. Pin No. Pin Name Pin Functtion 15 VG Charge pump capacitor connection pin. 14 VM Motor power supply connection pin. 16 CP2 Charge pump capacitor connection pin. 18 CP1 Charge pump capacitor connection pin. Equivalent Circuit 18 14 16 15 VREG5 GND 19 VREG5 Internal power supply capacitor connection pin. VM GND 28 VREF Constant current control reference voltage input pin. VREG5 GND No.A2056-6/13 LV8771VH Description of operation Input Pin Function The function to prevent including the turn from the input to the power supply is built into each logic pin. Therefore, the current turns to the power supply even if power supply (VM) is turned off with the voltage impressed to the input pin and there is not crowding. (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 Low or Open Standby mode Standby Charge pump Standby High Operating mode Operating Operating (2) Output control logic I01(02) I11(12) Low Low 0 High Low IO = (( VREF / 5 ) / RF ) × 40% Low High IO = (( VREF / 5 ) / RF ) × 70% High High IO = ( VREF / 5 ) / RF PH1(2) Output current (IO) Current direction Low OUTB → OUTA High OUTA → OUTB (3) Setting constant-current control reference current This IC is designed to automatically exercise PWM constant-current chopping control for the motor current by setting the output current. Based on the voltage input to the VREF pin and the resistance connected between RF and GND, the output current that is subject to the constant-current control is set using the calculation formula below: IOUT = (VREF / 5) / RF resistance * The above setting is the output current at I01(02) = High, I11(12) = Low. (Example) When VREF = 1.5V, I01(02) = High, I11(12) = Low and RF1(2) resistance is 0.5Ω, the setting current is shown below. IOUT = (1.5V / 5) / 0.5Ω = 0.6A (4) Chopping frequency control logic FC Chopping frequency Low 31kHz High 62kHz (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. The blanking time is fixed at approximately 1μs. No.A2056-7/13 LV8771VH (6) Current control operation specification (Sine wave increasing direction) STEP Set current Set current Coil current Forced CHARGE section Current mode CHARGE SLOW FAST CHARGE SLOW FAST (Sine wave decreasing direction) STEP Set current Coil current Forced CHARGE section Current mode CHARGE SLOW FAST Set current Forced CHARGE section FAST CHARGE SLOW In each current mode, the operation sequence is as described below : • At rise of chopping frequency, the CHARGE mode begins. (In the time defined as the “blanking time,” the CHARGE mode is forced regardless of the magnitude of the coil current (ICOIL) and set current (IREF).) • The coil current (ICOIL) and set current (IREF) are compared in this blanking time. When (ICOIL < IREF) state exists ; The CHARGE mode up to ICOIL ≥ IREF, then followed by changeover to the SLOW DECAY mode, and finally by the FAST DECAY mode for approximately 1μs. When (ICOIL < IREF) state does not exist ; The FAST DECAY mode begins. The coil current is attenuated in the FAST DECAY mode till one cycle of chopping is over. Above operations are repeated. Normally, the SLOW (+FAST) DECAY mode continues in the sine wave increasing direction, then entering the FAST DECAY mode till the current is attenuated to the set level and followed by the SLOW DECAY mode. No.A2056-8/13 LV8771VH (7) Typical current waveform in each excitation mode Full step (CW mode) H I01,I11 PH1 H I02,I12 PH2 (%) 100 I1 0 -100 (%) 100 I2 0 -100 Half step full torque (CW mode) I01 I11 PH1 I02 I12 PH2 (%) 100 l1 0 -100 (%) 100 l2 0 -100 No.A2056-9/13 LV8771VH Half step (CW mode) I01 I11 PH1 I02 I12 PH2 (%) 100 I1 0 -100 (%) 100 I2 0 -100 Quarter step (CW mode) I01 I11 PH1 I02 I12 PH2 (%) 100 I1 0 -100 (%) 100 I2 0 -100 No.A2056-10/13 LV8771VH (8) Charge Pump Circuit When the ST pin is set High, the charge pump circuit operates and the VG pin voltage is boosted from the VM voltage to the VM + VREG5 voltage. Because the output is not turned on if VM+4V or more is not pressured, the voltage of the VG pin recommends the drive of the motor to put the time of tONG or more, and to begin. ST VG pin voltage VM+VREG5 VM+4V VM tONG VG Pin Voltage Schematic View No.A2056-11/13 LV8771VH Application Circuit Example 1 SGND VREF 28 2 NC FC 27 3 OUT2B ST 26 4 VM2 1.5V + - PH2 25 5 PGND2 I02 24 6 RF2 I12 23 7 OUT2A Logic input PH1 22 LV8771VH M 8 OUT1B I01 21 9 RF1 I11 20 VREG5 19 10 PGND1 CP1 18 11 VM1 NC 17 12 OUT1A 24V - + Logic input 13 NC CP2 16 14 VM VG 15 Each constant setting formula of above circuit example is as below. Setting of chopping frequency: 31kHz (FC = Low) The setting constant-current level becomes like a list. (Example) I01(02) = High, I11(12) = High When VREF = 1.5V, RF = 0.47Ω IOUT = VREF/5/RF resistance = (1.5V/5) / 0.47Ω = 0.64A I01(02) I11(12) Low Low 0 High Low IO = (( VREF / 5 ) / RF ) × 40% Low High IO = (( VREF / 5 ) / RF ) × 70% High High IO = ( VREF / 5 ) / RF PH1(2) Output current (IO) Current direction Low OUTB → OUTA High OUTA → OUTB No.A2056-12/13 LV8771VH SANYO Semiconductor Co.,Ltd. assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all SANYO Semiconductor Co.,Ltd. products described or contained herein. Regarding monolithic semiconductors, if you should intend to use this IC continuously under high temperature, high current, high voltage, or drastic temperature change, even if it is used within the range of absolute maximum ratings or operating conditions, there is a possibility of decrease reliability. Please contact us for a confirmation. SANYO Semiconductor Co.,Ltd. strives to supply high-quality high-reliability products, however, any and all semiconductor products fail or malfunction with some probability. It is possible that these probabilistic failures or malfunction could give rise to accidents or events that could endanger human lives, trouble that could give rise to smoke or fire, or accidents that could cause damage to other property. When designing equipment, adopt safety measures so that these kinds of accidents or events cannot occur. Such measures include but are not limited to protective circuits and error prevention circuits for safe design, redundant design, and structural design. In the event that any or all SANYO Semiconductor Co.,Ltd. products described or contained herein are controlled under any of applicable local export control laws and regulations, such products may require the export license from the authorities concerned in accordance with the above law. No part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying and recording, or any information storage or retrieval system, or otherwise, without the prior written consent of SANYO Semiconductor Co.,Ltd. Any and all information described or contained herein are subject to change without notice due to product/technology improvement, etc. When designing equipment, refer to the "Delivery Specification" for the SANYO Semiconductor Co.,Ltd. product that you intend to use. Upon using the technical information or products described herein, neither warranty nor license shall be granted with regard to intellectual property rights or any other rights of SANYO Semiconductor Co.,Ltd. or any third party. SANYO Semiconductor Co.,Ltd. shall not be liable for any claim or suits with regard to a third party's intellectual property rights which has resulted from the use of the technical information and products mentioned above. This catalog provides information as of May, 2012. Specifications and information herein are subject to change without notice. PS No.A2056-13/13