LV8713T-TLM-H

Ordering number : ENA1918 LV8713T Bi-CMOS LSI PWM Constant-Current Control Stepping Motor Driver http://onsemi.com Overview The LV8713T is a stepping motor driver of the micro-step drive corresponding to supports 8W 1-2 phase excitation. It is the best for the drive of the stepping motor for a scanner and a small printer. Features • Single-channel PWM constant-current control stepping motor driver incorporated. • Control mode can be set to 2-phase, 1-2 phase, 4W1-2 phase , or 8W1-2 phase • Microstep can control easily by the CLK-IN input. • Power-supply voltage of motor : VM max = 18V • Output current : IO max = 0.8A • Output ON resistance : RON = 1.1Ω (upper and lower total, typical, Ta = 25°C ) • A thermal shutdown circuit and a low voltage detecting circuit are built into. Specifications Absolute Maximum Ratings at Ta = 25°C Parameter Symbol Motor supply voltage VM max Logic supply voltage VCC max Output peak current IO peak Output continuousness current IO max Logic input voltage VIN Allowable power dissipation Pd max Operating temperature Storage temperature Conditions Ratings Unit 18 V 6 V Each 1ch, tw ≤ 10ms, duty 20% 1.0 A Each 1ch 800 mA -0.3 to VCC + 0.3 V 1.35 W Topr -20 to +85 °C Tstg -55 to +150 °C * * Specified circuit board : 57.0mm×57.0mm×1.7mm, glass epoxy 2-layer board. Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability. Semiconductor Components Industries, LLC, 2013 June, 2013 20211 SY 20110117-S00002 No.A1918-1/16 LV8713T Allowable Operating Ratings at Ta = 25°C Parameter Symbol Motor supply voltage range VM Logic supply voltage range VCC Logic input voltage VIN VREF input voltage range VREF Conditions Ratings Unit 4 to 16 V 2.7 to 5.5 V -0.3 tp VCC+0.3 V 0 to VCC-1.8 V Electrical Characteristics at Ta = 25°C, VM = 12V, VCC = 3.3VVREF = 1.0V Parameter Symbol Ratings Conditions min Standby mode current drain Current drain typ IMstn PS = “L”, no load 1 μA ICCstn PS = “L”, no load 1 μA IM PS = “H”, no load 0.3 0.5 0.7 mA 0.9 1.3 1.7 mA ICC PS = “H”, no load Thermal shutdown temperature TSD Design guarantee 180 Thermal hysteresis width ΔTSD Design guarantee 40 VCC low voltage cutting voltage VthVCC Low voltage hysteresis voltage VthHIS REG5 output voltage Vreg5 IO = -1mA Output on resistance RonU °C °C 2.1 2.4 2.7 V 100 130 160 mV 4.5 5 5.5 V IO = -800mA, Source-side on resistance 0.78 1.0 Ω 0.32 0.43 Ω 10 μA 1.0 1.2 V RonD IO = 800mA, Sink-side on resistance Output leakage current IOleak VO = 15V Diode forward voltage VD ID = -800mA Logic pin input current Unit max IINL VIN = 0.8V 4 8 12 μA IINH VIN = 3.3V 22 33 45 μA Logic high-level input voltage VINH Logic low-level input voltage VINL VREF input current IREF VREF = 1.0V Current setting comparator Vtatt00 ATT1 = L, ATT2 = L 0.191 0.200 0.209 threshold voltage Vtatt01 ATT1 = H, ATT2 = L 0.152 0.160 0.168 V Vtatt10 ATT1 = L, ATT2 = H 0.112 0.120 0.128 V Vtatt11 ATT1 = H, ATT2 = H 0.072 0.080 0.088 V Fchop Cchop = 220pF 36 45 54 (current attenuation rate switching) Chopping frequency CHOP pin threshold voltage 2.0 V 0.8 V μA -0.5 V kHz VCHOPH 0.6 0.7 0.8 V VCHOPL 0.17 0.2 0.23 V 7 10 13 μA 250 400 0.191 0.200 0.209 V CHOP pin charge/discharge current Ichop MONI pin saturation voltage Vsatmon Imoni = 1mA Current setting 8W1-2-phase Vtdac0_2W Step 0 (When initialized : channel 1 comparator drive threshold Vtdac1_8W Step 1 (Initial state+1) 0.191 0.200 0.209 V voltage Vtdac2_8W Step 2 (Initial state+2) 0.191 0.200 0.209 V Vtdac3_8W Step 3 (Initial state+3) 0.189 0.198 0.207 V Vtdac4_8W Step 4 (Initial state+4) 0.187 0.196 0.205 V Vtdac5_8W Step 5 (Initial state+5) 0.185 0.194 0.203 V Vtdac6_8W Step 6 (Initial state+6) 0.183 0.192 0.201 V Vtdac7_8W Step 7 (Initial state+7) 0.179 0.188 0.197 V Vtdac8_8W Step 8 (Initial state+8) 0.175 0.184 0.193 V Vtdac9_8W Step 9 (Initial state+9) 0.171 0.180 0.189 V Vtdac10_8W Step 10 (Initial state+10) 0.167 0.176 0.185 V Vtdac11_8W Step 11 (Initial state+11) 0.163 0.172 0.181 V Vtdac12_8W Step 12 (Initial state+12) 0.158 0.166 0.174 V Vtdac13_8W Step 13 (Initial state+13) 0.152 0.160 0.168 V Vtdac14_8W Step 14 (Initial state+14) 0.146 0.154 0.162 V Vtdac15_8W Step 15 (Initial state+15) 0.140 0.148 0.156 V Vtdac16_8W Step 16 (Initial state+16) 0.132 0.140 0.148 V (current step switching) mV comparator level) Continued on next page. No.A1918-2/16 LV8713T Continued from preceding page. Parameter Symbol Ratings Conditions min typ Unit max Current setting 8W1-2-phase Vtdac17_8W Step 17 (Initial state+17) 0.126 0.134 0.142 V comparator drive Vtdac18_8W Step 18 (Initial state+18) 0.118 0.126 0.134 V Vtdac19_8W Step 19 (Initial state+19) 0.112 0.120 0.128 V Vtdac20_8W Step 20 (Initial state+20) 0.102 0.110 0.118 V Vtdac21_8W Step 21 (Initial state+21) 0.094 0.102 0.110 V Vtdac22_8W Step 22 (Initial state+22) 0.086 0.094 0.102 V Vtdac23_8W Step 23 (Initial state+23) 0.078 0.086 0.094 V Vtdac24_8W Step 24 (Initial state+24) 0.068 0.076 0.084 V Vtdac25_8W Step 25 (Initial state+25) 0.060 0.068 0.076 V Vtdac26_8W Step 26 (Initial state+26) 0.050 0.058 0.066 V Vtdac27_8W Step 27 (Initial state+27) 0.040 0.048 0.056 V Vtdac28_8W Step 28 (Initial state+28) 0.032 0.040 0.048 V Vtdac29_8W Step 29 (Initial state+29) 0.022 0.030 0.038 V Vtdac30_8W Step 30 (Initial state+30) 0.012 0.020 0.028 V Vtdac31_8W Step 31 (Initial state+31) 0.002 0.010 0.018 V Vtdac0_4W Step 0 (When initialized : channel 1 0.191 0.200 0.209 V threshold voltage (current step switching) 4W1-2-phase drive 1-2 phase drive comparator level) Vtdac2_4W Step 2 (Initial state+1) 0.191 0.200 0.209 V Vtdac4_4W Step 4 (Initial state+2) 0.187 0.196 0.205 V Vtdac6_4W Step 6 (Initial state+3) 0.183 0.192 0.201 V Vtdac8_4W Step 8 (Initial state+4) 0.175 0.184 0.193 V Vtdac10_4W Step 10 (Initial state+5) 0.167 0.176 0.185 V Vtdac12_4W Step 12 (Initial state+6) 0.158 0.166 0.174 V Vtdac14_4W Step 14 (Initial state+7) 0.146 0.154 0.162 V Vtdac16_4W Step 16 (Initial state+8) 0.132 0.140 0.148 V Vtdac18_4W Step 18 (Initial state+9) 0.118 0.126 0.134 V Vtdac20_4W Step 20 (Initial state+10) 0.102 0.110 0.118 V Vtdac22_4W Step 22 (Initial state+11) 0.086 0.094 0.102 V Vtdac24_4W Step 24 (Initial state+12) 0.068 0.076 0.084 V Vtdac26_4W Step 26 (Initial state+13) 0.050 0.058 0.066 V Vtdac28_4W Step 28 (Initial state+14) 0.032 0.040 0.048 V Vtdac30_4W Step 30 (Initial state+15) 0.012 0.020 0.028 V Vtdac0_H Step 0 (When initialized : channel 1 0.191 0.200 0.209 V comparator level) 2 phase drive Vtdac16_H Step 4 (Initial state+1) 0.132 0.140 0.148 V Vtdac16_F Step 4' (When initialized : channel 1 0.191 0.200 0.209 V comparator level) No.A1918-3/16 LV8713T Package Dimensions unit : mm (typ) 3260A 6.5 0.5 6.4 13 4.4 24 12 1 0.5 0.15 0.22 1.2max 0.08 (1.0) (0.5) SANYO : TSSOP24(225mil) Pd max - Ta 1.5 Allowable power dissipation, Pd max - W 1.35 1.0 0.70 0.5 Specified circuit board : 57.0 × 57.0 × 1.7mm3 2-layer glass epoxy board 0 - 20 0 20 40 60 80 100 Ambient temperature, Ta - C FR OUT1A PGND RNF1 OUT1B VM OUT2A RNF2 OUT2B PGND MD1 MD2 Pin Assignment 24 23 22 21 20 19 18 17 16 15 14 13 1 2 3 4 5 6 7 8 9 10 11 12 RST OE REG5 PS MONI VREF STEP ATT1 ATT2 CHOP VCC GND LV8713T No.A1918-4/16 + - + - GND VREF VCC REG5 LVS TSD + - PS Start circuit Attenuator (100%/80% /50%/20%) CHOP ATT1 ATT2 Oscillation circuit 1/5 Standard voltage VM-5V standard voltage OUT1B Current selection (8W1-2/ 4W1-2/1-2/2) + OUT1A Output preamplifier stage Output preamplifier stage MD1 MD2 FR + RNF2 Current selection (8W1-2/ 4W1-2/1-2/2) OUT2B STEP RST OE OUT2A Output control logic Output preamplifier stage VM Output preamplifier stage RNF1 MONI PGND LV8713T Block Diagram No.A1918-5/16 LV8713T Pin Functions Pin No. Pin Name Pin Functtion 1 RST Excitation reset signal input pin. 2 OE Output enable signal input pin. 7 STEP STEP signal input pin. 8 ATT1 Motor holding current switching pin. 9 ATT2 Motor holding current switching pin. 13 MD2 Excitation mode switching pin 2. 14 MD1 Excitation mode switching pin 1. 24 FR CW / CCW switching signal input pin. Equivalent Circuit VCC GND 4 PS Power save signal input pin. VCC 4 GND 16 OUT2B Channel 2 OUTB output pin. 17 RNF2 Channel 2 current-sense resistor 18 OUT2A Channel 2 OUTA output pin. 20 OUT1B Channel 1 OUTB output pin. 21 RNF1 Channel 1 current-sense resistor VM connection pin. 20 16 23 18 connection pin. 23 OUT1A Channel 1 OUTA output pin.Power 21 17 GND 6 VREF Constant current control reference voltage input pin. VCC 6 GND Continued on next page. No.A1918-6/16 LV8713T Continued from preceding page. Pin No. 3 Pin Name REG5 Pin Functtion Internal power supply capacitor connection pin. Equivalent Circuit VM 3 GND 5 MONI Position detection monitor pin. VCC 5 GND 10 CHOP Chopping frequency setting capacitor connection pin. VCC GND 10 No.A1918-7/16 LV8713T Description of operation Stepping motor control (1) Power save function This IC is switched between standby and operating mode by setting the PS pin. In standby mode, the IC is set to power-save mode and all logic is reset. In addition, the internal regulator circuit do not operate in standby mode. PS Mode Internal regulator Low or Open Standby mode Standby High Operating mode Operating (2) The order of turning on recommended power supply The order of turning on each power supply recommends the following. VCC power supply order → VM power supply order → PS pin = High It becomes the above-mentioned opposite for power supply OFF. However, the above-mentioned is a recommendation, the overcurrent is not caused by not having defended this, and IC is destroyed. (3) STEP pin function Operating mode Input PS STP Low * Standby mode High Excitation step proceeds High Excitation step is kept (4) Excitation mode setting function(initial position) MD1 MD2 Excitation mode Initial position Channel 1 Channel 2 -100% Low Low 2 phase excitation 100% High Low 1-2 phase excitation 100% 0% Low High 4W1-2 phase excitation 100% 0% High High 8W1-2 phase excitation 100% 0% This is the initial position of each excitation mode in the initial state after power-on and when the counter is reset. (5) Position detection monitoring function The MONI position detection monitoring pin is of an open drian type. When the excitation position is in the initial position, the MONI output is placed in the ON state. (Refer to "(12) Examples of current waveforms in each of the excitation modes.") No.A1918-8/16 LV8713T (6) Reset function RST Operating mode High Normal operation Low Reset state RST RESET STEP MONI 1ch output 0% 2ch output Initial position When the RST pin is set to Low, the excitation position of the output is forcibly set to the initial position, and the MONI output is placed in the ON state. When RST is then set to High, the excitation position is advanced by the next STEP input. (7) Output enable function OE Operating mode Low Output ON High Output OFF OE Power save mode STEP MONI 1ch output 0% 2ch output Output is high-impedance When the OE pin is set High, 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 Low, the output level conforms to the excitation position proceeded by the STEP input. No.A1918-9/16 LV8713T (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. (9) Setting constant-current control The setting of STM driver's constant current control is decided the VREF voltage from the resistance connected between RNF and GND by the following expression. IOUT = (VREF/5)/RNF resistance * The above setting is the output current at 100% of each excitation mode. The voltage input to the VREF pin can be switched to four-step settings depending on the statuses of the two inputs, ATT1 and ATT2. This is effective for reducing power consumption when motor holding current is supplied. Attenuation function for VREF input voltage ATT1 ATT2 Current setting reference voltage attenuation ratio Low Low 100% High Low 80% Low High 60% High High 40% The formula used to calculate the output current when using the function for attenuating the VREF input voltage is given below. IOUT = (VREF/5) × (attenuation ratio)/RNF resistance Example : At VREF of 1.0V, a reference voltage setting of 100% [(ATT1, ATT2) = (L, L)] and an RNF resistance of 0.5Ω, the output current is set as shown below. IOUT = 1.0V/5 × 100%/0.5Ω = 400mA If, in this state, (ATT1, ATT2) is set to (H, H), IOUT will be as follows : IOUT = 400mA × 40% = 160mA In this way, the output current is attenuated when the motor holding current is supplied so that power can be conserved. No.A1918-10/16 LV8713T (10) Chopping frequency setting For constant-current control, this IC performs chopping operations at the frequency determined by the capacitor (Cchop) connected between the CHOP pin and GND. The chopping frequency is set as shown below by the capacitor (Cchop) connected between the CHOP pin and GND. Tchop C × V × 2 / I (s) V : Width of suresshu voltage, typ 0.5V I : Charge/discharge current, typ 10μA For instance, when Cchop is 200pF, the chopping frequency will be as follows : Fchop 1 / Tchop (Hz) (11) Output current vector locus (one step is normalized to 90 degrees) Channel 1 phase current ratio (%) 100.0 66.7 33.3 0.0 0.0 33.3 66.7 100.0 Channel 2 current ratio (%) No.A1918-11/16 LV8713T Setting current ration in each excitation mode STEP 8W1-2 phase (%) Channel 1 4W1-2 phase (%) Channel 2 Channel 1 θ0 100 0 θ1 100 5 θ2 100 10 θ3 99 15 θ4 98 20 θ5 97 24 θ6 96 29 θ7 94 34 θ8 92 38 θ9 90 43 θ10 88 47 θ11 86 51 θ12 83 55 θ13 80 60 θ14 77 63 θ15 74 67 θ16 70 70 θ17 67 74 θ18 63 77 θ19 60 80 θ20 55 83 θ21 51 86 θ22 47 88 θ23 43 90 θ24 38 92 θ25 34 94 θ26 29 96 θ27 24 97 θ28 20 98 θ29 15 99 θ30 10 100 θ31 5 100 θ32 0 100 1-2 phase (%) Channel 2 Channel 1 100 0 100 10 98 20 96 29 92 38 88 47 83 55 77 63 70 70 63 77 55 83 47 88 38 92 29 96 20 98 10 100 0 100 2-phase (%) Channel 2 Channel 1 100 0 70 70 0 100 100 Channel 2 100 No.A1918-12/16 LV8713T (12) Typical current waveform in each excitation mode 2-phase excitation (CW mode) STEP MONI (%) 100 l1 0 -100 (%) 100 I2 0 -100 1-2 phase excitation (CW mode) STEP MONI (%) 100 I1 0 -100 (%) 100 I2 0 -100 No.A1918-13/16 LV8713T 4W1-2 phase excitation (CW mode) STEP MONI (%) 100 50 I1 0 -50 -100 (%) 100 50 I2 0 -50 -100 8W1-2 phase excitation (CW mode) STEP MONI (%) 100 50 I1 0 -50 -100 (%) 100 50 I2 0 -50 -100 No.A1918-14/16 LV8713T (13) Current control timing chart(Chopping operation) (Sine wave increasing direction) STEP Set current Set current Coil current Chopping cycle fchop BLANKING section BLANKING section Current mode CHARGE SLOW FAST CHARGE SLOW FAST (Sine wave decreasing direction) STEP Set current Coil current Set current Chopping cycle fchop Current mode CHARGE Chopping cycle BLANKING section SLOW FAST BLANKING section Forced CHARGE section FAST CHARGE BLANKING section SLOW In each current mode, the operation sequence is as described below : • At rise of chopping frequency, the CHARGE mode begins. (The Blanking section in which the CHARGE mode is forced regardless of the magnitude of the coil current (ICOIL) and set current (IREF) exists for 1μs.) • 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.A1918-15/16 LV8713T Application Circuit Example Logic input - + 1.0V Clock input 24 OUT1A 23 REG5 PGND 22 4 PS RNF1 21 5 MONI OUT1B 20 6 VREF VM 19 7 STEP 8 ATT1 RNF2 17 9 ATT2 OUT2B 16 10 CHOP PGND 15 11 VCC MD1 14 12 GND MD2 RST 2 OE 3 LV8713T Short-circuit state detection monitor FR 1 Logic input + - 12V OUT2A 18 M 220pF 3.3V - + Logic input 13 The formulae for setting the constants in the examples of the application circuits above are as follows : Constant current (100%) setting When VREF = 1.0V IOUT = VREF/5/RNF resistance = 1.0V/5/0.51Ω = 0.392A Chopping frequency setting Fchop = Ichop/ (Cchop × Vtchop × 2) = 10μA/ (220pF × 0.5V × 2) = 45kHz ON Semiconductor and the ON logo are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. 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