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Ordering number : ENA0438A
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Bi-CMOS LSI
LV8044LP
Overview
For Digital Still Camera
6-channel Motor Driver IC
The LV8044LP is a 6-channel motor driver IC for digital still camera.
Functions
* Two microstep drive H-bridge driver channels. * Two microstep drive/PWM saturated drive switchable H-bridge driver channels. * Two constant-current drive H-bridge driver channels. * Drive mode switchable between 2-phase, 1-2 phase full torque, 1-2 phase, and 4W1-2 phase (channels 1, 2, 3, and 4). * Microstep drive step advance controlled by a single step signal input (channels 1, 2, 3, and 4). * Ability to set the hold current to one of four levels (channels 1, 2, 3, and 4). * Ability to set the constant-current reference voltage to one of 16 levels from the serial data (channels 5 and 6). * Eight-bit 3-wire serial control. * Three on-chip photosensor driver circuits.
Specifications
Maximum Ratings at Ta = 25C
Parameter Power supply voltage 1 Power supply voltage 2 Output peak current Output continuous current Maximum power drain allowed 1 Maximum power drain allowed 2 Operating temperature Storage temperature Symbol VM max VCC max IO peak IO max Pd max1 Pd max2 Topg Tstg Each CH tw 10ms, duty 20% Each CH IC proper With substrate * Conditions Ratings 6.0 6.0 600 400 0.25 1.4 -20 to +85 -55 to +150 Unit V V mA mA mW mW C C
*: With 40mm x 50mm x 0.8mm glass epoxy substrate (four-layer substrate).
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 (home appliances, AV equipment, communication device, office equipment, industrial equipment etc.). 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 applications outside the standard applications of our customer who is considering such use and/or outside the scope of our intended standard applications, please consult with us 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.
32807 MS PC / 71906 MS OT 20060512-S00004 No.A0438-1/25
LV8044LP
Recommended Operating Conditions at Ta = 25C
Parameter Power supply voltage range 1 Power supply voltage range 2 Logic input voltage range STEP frequency PWM frequency Symbol VM VCC VIN FSTEP FPWM STEP1, STEP2 STEP3, STEP4 Conditions Ratings
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Unit 2.7 to 5.5 2.7 to 5.5 0 to VCC +0.3 to 64 to 100 V V V KHz KHz
Electrical Characteristics at Ta = 25C, VM = 5V, VCC = 3.3V
Parameter Standby supply current Motor supply current Logic supply current VCC low-voltage cut voltage Low-voltage hysteresis voltage Thermal shutdown temperature Thermal hysteresis width Symbol ISTN IM ICC VthVCC VthHIS TSD TSD Design guarantee Design guarantee ST = "L" ST = "H", PWM3 = PWM4 = "H", IN51 = IN61 = "H", no load ST = "H", PWM3 = PWM4 = "H", IN51 = IN61 = "H", no load 2.1 100 150 2.35 150 180 40 2.6 200 200 V mV C C 2 3 4 mA 50 Conditions min Ratings typ max 1.0 100 A A Unit
Microstep Driver (channels 1, 2, 3, and 4)
Output on resistance Ronu Rond Output leak current Diode forward voltage 1 Logic pin input current IOleak1 VD1 IinL IinH Logic input "H" level voltage Logic input "L" level voltage Current selection reference voltage level Vstep15 Vstep14 Vstep13 Vstep12 Vstep11 Vstep10 Vstep9 Vstep8 Vstep7 Vstep6 Vstep5 Vstep4 Vstep3 Vstep2 Vstep1 1-2 phase Vstep16 Vstep8 1-2 phase (Full torque) Vstep8 2 phase Vstep8 Vstep16 4W1-2 phase Vinh Vinl Vstep16 ID = -400mA VIN = 0V (ST, STEP1, STEP2) VIN = 3.3V (ST, STEP1, STEP2) ST, STEP1, STEP2 ST, STEP1, STEP2 Step 16 (Initial level: the channel 1 comparator level) Step 15 (Initial+1) Step 14 (Initial+2) Step 13 (Initial+3) Step 12 (Initial+4) Step 11 (Initial+5) Step 10 (Initial+6) Step 9 (Initial+7) Step 8 (Initial+8) Step 7 (Initial+9) Step 6 (Initial+10) Step 5 (Initial+11) Step 4 (Initial+12) Step 3 (Initial+13) Step 2 (Initial+14) Step 1 (Initial+15) Step 16 (Initial level: the channel 1 comparator level) Step 8 (Initial+1) Step 16 (Initial level: the channel 1 comparator level) Step 8 (Initial+1) Step 8 0.185 0.185 0.200 0.200 0.215 0.215 V V 0.129 0.185 0.148 0.200 0.159 0.215 V V 0.185 0.185 0.176 0.170 0.162 0.154 0.146 0.129 0.113 0.097 0.079 0.062 0.044 0.024 0.006 0.185 0.200 0.200 0.193 0.186 0.178 0.171 0.163 0.148 0.131 0.115 0.097 0.079 0.06 0.04 0.02 0.200 0.215 0.215 0.206 0.200 0.192 0.184 0.176 0.159 0.143 0.127 0.109 0.092 0.074 0.054 0.036 0.215 V V V V V V V V V V V V V V V V 0.185 0.200 20 2.5 1.0 0.215 33 0.9 IO = 400mA, Upper ON resistance IO = 400mA, Lower ON resistance 0.7 0.5 0.8 0.6 1.0 1.2 1.0 50 A V A A V V V
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No.A0438-2/25
LV8044LP
Continued from preceding page. Parameter Chopping frequency Symbol fchop1 fchop2 fchop3 fchop4 Current setting reference voltage VSEN00 VSEN01 VSEN10 VSEN11 (D5, D6) = (0, 0) (D5, D6) = (0, 1) (D5, D6) = (1, 0) (D5, D6) = (1, 1) Conditions min 104 52 160 80 0.185 0.119 0.085 0.051 Ratings typ 130 65 200 100 0.200 0.134 0.100 0.066
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Unit max 156 78 240 120 0.215 0.149 0.115 0.081 KHz KHz KHz KHz V V V V
Constant-Current Drive (channels 5 and 6)
Output on resistance Ronu Rond Output leak current Diode forward voltage 1 Logic pin input current IOleak VD1 IinL IinH Logic input "H" level voltage Logic input "L" level voltage Output constant current Current setting reference voltage Vinh Vinl IOUT Vref0 Vref1 Vref2 Vref3 Vref4 Vref5 Vref6 Vref7 Vref8 Vref9 VrefA VrefB VrefC VrefD VrefE VrefF ID = -400mA VIN = 0V, (IN51, IN52, IN61, IN62) VIN = 3.3V, (IN51, IN52, IN61, IN62) IN51, IN52, IN61, IN62 IN51, IN52, IN61, IN62 Rload = 3,RF = 0.5, Internal standard = 0.2V (D4, D5, D6, D7) = (0, 0, 0, 0) (D4, D5, D6, D7) = (1, 0, 0, 0) (D4, D5, D6, D7) = (0, 1, 0, 0) (D4, D5, D6, D7) = (1, 1, 0, 0) (D4, D5, D6, D7) = (0, 0, 1, 0) (D4, D5, D6, D7) = (1, 0, 1, 0) (D4, D5, D6, D7) = (0, 1, 1, 0) (D4, D5, D6, D7) = (1, 1, 1, 0) (D4, D5, D6, D7) = (0, 0, 0, 1) (D4, D5, D6, D7) = (1, 0, 0, 1) (D4, D5, D6, D7) = (0, 1, 0, 1) (D4, D5, D6, D7) = (1, 1, 0, 1) (D4, D5, D6, D7) = (0, 0, 1, 1) (D4, D5, D6, D7) = (1, 0, 1, 1) (D4, D5, D6, D7) = (0, 1, 1, 1) (D4, D5, D6, D7) = (1, 1, 1, 1) 0.285 0.19 0.18 0.171 0.161 0.156 0.152 0.147 0.143 0.137 0.133 0.128 0.123 0.114 0.104 0.095 0.30 0.20 0.190 0.180 0.170 0.165 0.160 0.155 0.150 0.145 0.140 0.135 0.130 0.120 0.110 0.100 0.315 0.21 0.2 0.189 0.179 0.173 0.168 0.163 0.158 0.152 0.147 0.142 0.137 0.126 0.116 0.105 V V V V V V V V V V V V V V V V 380 400 20 2.5 1.0 420 33 0.9 IO = 400mA, Upper ON resistance IO = 400mA, Lower ON resistance 0.7 0.5 0.8 0.6 1.0 1.2 1.0 50 A V A A V V mA
Photo-sensor Drive Circuit
Output saturation voltage Vsat IO = -20mA 0.09 0.12 V
Serial Data Transfer Pin
Logic pin input current IinL IinH Logic input "H" level voltage Logic input "L" level voltage Minimum SLCK "H" pulse width Minimum SLCK "L" pulse width Minimum setup time (STB SCLK rising edge) Minimum setup time (SCLK rising edge STB) Minimum STB pulse width Data setup time Data hold time Maximum SCLK frequency Tstbw Tds Tdh Fclk 0.125 0.125 0.125 4 s s s MHz Tsup2 0.125 s Vinh Vinl Tckh Tckl Tsup1 VIN = 0V (SCLK, SDATA, STB) VIN = 3.3V (SCLK, SDATA, STB) SCLK, SDATA, STB SCLK, SDATA, STB 0.125 0.125 0.125 20 2.5 1.0 33 1.0 50 A A V V s s s
No.A0438-3/25
LV8044LP
Serial Input Switching Characteristics Timing Chart
Fclk Tsup1 Tckh Tckl
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SCLK
Tds Tdh
SDATA
D0
D1
D2
D6
D7 Tsup2
STB
Tstbw
Package Dimensions
unit : mm (typ) 3302A
1.6
Top View Bottom View
Pd max - Ta
Specified Substrate: 40x50x0.8mm3 glass epoxy four-layer board
Allowable Power Consumption, Pd max - W
1.4 1.2
0.35 5.0 21 20 30
5.0
0.35
31
0.4
(0.7)
0.8
0.73
40 11 10 1 0.2 (0.7)
0.85max
0.4 0.25
Independent IC
0.13
0.05 0 NOM
0 -20
0
20
40
60
80
100
SANYO : VQLP40(5.0X5.0)
Ambient Temperature, Ta - C
Pin Assignment
30 29 28 27 26 25 24 23 22 21
OUT6B
OUT6A
OUT4B
OUT4A
OUT3B
PGND2
OUT3A
RF6
RF4
RF3
31 IN62 32 IN61 33 VM6
PWM3/ 20 STEP2
PWM4 19 VM34 18 VCC 17
34 SGND 35 PI1 36 PI2 37 PI3/MO 38 VM5 39 IN52
LV8044LP
STB 16 SDATA 15
TOP VIEW
SCLK 14 STEP1 13 VM12 12
PGND1
OUT5B
OUT5A
OUT2B
OUT2A
OUT1B
OUT1A
10
40 IN51
ST 11
RF5
RF2
1
2
3
4
5
6
7
8
RF1
9
No.A0438-4/25
Block Diagram
RF1
OUT1A
OUT1B
VM12 VM6 OUT6A
OUT2A
OUT2B
RF2
RF3 OUT3A
OUT3B
VM34
OUT4A
OUT4B
RF4
VM5 OUT5A
OUT5B
RF5
OUT6B
RF6 PGND2
PGND1
LV8044LP
Output control logic
Output control logic
Output control logic
Output control logic
Current selection
(4W1-2/1-2/ 1-2Full/2) (4W1-2/1-2/ 1-2Full/2)
Current selection
Monitor selector Current selection Current selection
(4W1-2/1-2/ 1-2Full/2)
(4W1-2/1-2/ 1-2Full/2)
Reference voltage selection circuit (0.1 to 0.3 V in 16 steps)
VCC
TSD
Oscillator Serial-to-parallel converter (8 bits)
LVS
Reference voltage circuit (0.3 V)
SGND SCLK SDATA STB ST PWM4 IN51 IN52 IN61 IN62 MO/PI3 PI1 V PI2 CC
STEP1
STEP2 /PWM3
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No.A0438-5/25
LV8044LP
Pin Function
Pin No. 13 20 19 40 39 32 31 14 15 16 11 10 7 21 24 4 27 8 5 23 26 2 29 9 6 22 25 3 28 12 18 38 33 35 36 Pin name STEP1 PWM3/STEP2 PWM4 IN51 IN52 IN61 IN62 SCLK SDATA STB ST OUT1A OUT2A OUT3A OUT4A OUT5A OUT6A OUT1B OUT2B OUT3B OUT4B OUT5B OUT6B RF1 RF2 RF3 RF4 RF5 RF6 VM12 VM34 VM5 VM6 PI1 PI2 Serial data transfer clock input Serial data input Serial data latch pulse input Chip enable 1ch 2ch 3ch 4ch 5ch 6ch 1ch 2ch 3ch 4ch 5ch 6ch 1ch 2ch 3ch 4ch 5ch 6ch Channels 1/2 - Motor power supply Channels 3/4 - Motor power supply Channels 5 - Motor power supply Channels 6 - Motor power supply Photosensor drive output Current sensing resistor connection OUTB output OUTA output Channel 6- Logic input 1 Function Channels 1/2 - STEP signal input 3ch PWM signal input / Channels 3/4 - STEP signal input 4ch PWM signal input Channel 5 - Logic input 1 Equivalent circuit
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No.A0438-6/25
LV8044LP
Continued from preceding page. Pin No. 37 Pin name PI3/MO Function Photosensor drive output 3/position detection monitor Equivalent circuit
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17 1 30 34
VCC PGND1 PGND2 SGND
Logic system power supply Channels 1/2/5 - Power system ground Channels 3/4/6 - Power system ground Signal system ground
Serial Data Input Specifications
1. Serial Data Input Setup
First set STB low and then input the SDATA and SCLK signals. The SCLK signal is not accepted when STB is high. SDATA inputs the data in the order D0, D1, ... D6, D7. Data is transferred on the rising edge of SCLK and after all data has been transferred, all the data is latched on the rising edge of STB. 2. Timing with which the Serial Data Settings are Reflected in the Output * STP timing mode (applies to microstep driver settings) Type 1: The hold, reset, and enable settings, as well as the reference voltage setting are reflected at the same time as the STB signal data latch operation. Type 2: The forward/reverse (FR) and the excitation setting mode (MS) setting that are set at STP setup are reflected in the output at the next clock rising edge after data latch. * STB timing (applies to settings other than the above) Type 1: The PWM driver, constant-current driver, PI, and other settings are reflected at the same time as the STB signal data latch operation.
No.A0438-7/25
LV8044LP
Serial Data Truth Table
Serial Logic Table (1)
Input D0 D1 D2 D3 D4 D5 D6 D7 0 1 0 1 * 0 0 0 * * * * * 0 1 * * * 1 0 0 * * * * * * * * * * 1 * * * * * 0 1 * * * * 1/2ch output enable * 0 1 (Dummy data) Output ON 0 0 1 1 * * * * * * * * 0 1 * * * * * 0 1 0 1 * * * * * * 0 * * * * 0 0 1 1 * * * * * * * * * * * * * * * 0 1 * * * * * 1/2ch counter reset Cancel Output OFF 1/2ch step hold (Dummy data) 1/2ch energization direction CW (Forward) CCW (Reverse) Cancel Hold Reset Channels 1 and 2 current reference voltage selection Channels 1 and 2 excitation mode selection 2 phase 1-2 phase (full torque) 1-2 phase 4W1-2 phase 100% (0.2V) 67% (0.134V) 50% (0.1V) 33% (0.066V) Setting mode Description Remarks Set channel 1ch 2ch 3ch 4ch 5ch 6ch
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Serial data reflection PI timing STEP1 STEP2 STB
No.A0438-8/25
LV8044LP
Serial Logic Table (2)
Input D0 D1 D2 D3 D4 D5 D6 D7 0 1 0 1 * 0 1 0 * * * * * 0 0 1 1 * * * * * * * * * * 0 1 0 1 * * * * * * 0 0 1 1 * * * * * * * * * * 0 1 3/4ch Channels 3 and 4 saturation/microstep selection 0 1 0 1 * * * * * * 1 1 0 0 1 * * * * * * * * 0 0 1 1 * * * * * * * * 0 1 * * * * * * * * * * 0 1 0 1 * * * * * * 0 1 * * * * * * * * 0 0 1 1 * * * * * * * * 0 1 * * * * * * * * * * 0 1 * * * * * * * * 0 1 (Dummy data) 3/4ch PWM DECAY (Saturated mode) 3/4ch energization direction (Microstep mode) 3/4ch step hold (Microstep mode) 3/4ch counter reset (Microstep mode) 3/4ch output enable (Microstep mode) 4ch energization direction (Saturated mode) 3ch energization direction (Saturated mode) OFF OUT3A OUT3B OUT3B OUT3A Brake OFF OUT4A OUT4B OUT4B OUT4A Brake Brake Standby mode CW (Forward) CCW (Reverse) Cancel Hold Reset Cancel Output OFF Output ON 3/4ch current reference voltage selection 3/4ch excitation mode selection 2 phase 1-2 phase (full torque) 1-2 phase 4W1-2 phase 100% (0.2V) 67% (0.134V) 50% (0.1V) 33% (0.066V) PWM Microstep Setting mode Description
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Remarks
Set channel 1ch 2ch 3ch 4ch 5ch 6ch
Serial data reflection PI timing STEP1 STEP2 STB
No.A0438-9/25
LV8044LP
Serial Logic Table (3)
Input D0 D1 D2 D3 D4 D5 D6 D7 0 1 0 1 * 0 0 1 * * * * * 0 1 * * * * * * * 1 0 1 * * * * * * * * * 1 0 1 0 1 0 1 0 1 1 0 0 1 1 0 0 1 1 1 0 0 0 0 1 1 1 1 0 1 1 1 1 1 1 1 1 Constant-current reference voltage 0.155V 0.150V 0.145V 0.140V 0.135V 0.130V 0.120V 0.110V 0.100V 0 0 1 1 * * * * * * * * 0 1 0 1 0 1 0 * * * * 0 1 0 1 * * * * 0 0 1 1 0 0 1 * * * * 0 0 1 1 * * * * 0 0 0 0 1 1 1 * * * * * * * * 0 1 * * 0 0 0 0 0 0 0 (Dummy data) Reference setting channel selection 5ch setting 6ch setting 0.300V 0.200V 0.190V 0.180V 0.170V 0.165V 0.160V 6ch energization direction 5ch energization direction OFF OUT5A OUT5B OUT5B OUT5A Brake OFF OUT6A OUT6B OUT6B OUT6A Brake *2 *1 Setting mode Description
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Remarks
Set channel 1ch 2ch 3ch 4ch 5ch 6ch
Serial data reflection PI timing STEP1 STEP2 STB
No.A0438-10/25
LV8044LP
Serial Logic Table (4)
Input D0 D1 D2 D3 D4 D5 D6 D7 0 1 * * * 0 1 1 * * * * * 0 1 * * * * * * * * * 0 1 1 * * * * * * * * * * 0 1 * * * * * 0 * * * * * * 0 1 * * * * * * * * * Photo-sensor drive 2 * * * * (Dummy data) * 0 (Dummy data) 1 * PI3/MO select * * * MO output channel selection (When MO output selected) MO output position * * * * * * * * * * 1 * * * * * 0 1 0 1 * 0 0 1 1 Chopping frequency setting 1-2 phase 130KHz 65KHz 200KHz 100KHz MO output 1/2ch 3/4ch *3 PI3 Output Photo-sensor drive 3 (When PI3 output selected) ON OFF ON Photo-sensor drive 1 OFF ON OFF Setting mode Description
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Remarks
Set channel 1ch 2ch 3ch 4ch 5ch 6ch
Serial data reflection PI timing STEP1 STEP2 STB
1
1
1
*
*
0
*
*
Initial position *4
Notes *1: This serial data is only accepted when the IN51/IN52 pulse inputs are in the Low/Low states, respectively. It is ignored at all other times. *2: This serial data is only accepted when the IN61/IN62 pulse inputs are in the Low/Low states, respectively. It is ignored at all other times. *3: When D4 = 1, MO is only output if microstep mode is selected for channels 3 and 4. In PWM mode, this output is held fixed at the high level. *4: The MO output can be specified to be the 1-2 phase position only in 4W1-2 phase excitation mode. In all other excitation modes, the MO output position becomes the initial position regardless of the serial data values.
No.A0438-11/25
LV8044LP
Channels 1 and 2 Driver Circuit (Microstep drive stepping mode driver)
STEP1 Pin Function
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Input ST Low High STEP1 *
Operating mode Standby mode Excitation step feed
High Excitation step hold
Excitation Mode Setting (D0 = 0, D1 = 0, D2 = 0)
D3 0 1 0 1 D4 0 0 1 1 Excitation mode 2 phase excitation 1-2 phase excitation (full torque) 1-2 phase excitation 4W1-2 phase excitation Initial position 1ch 100% 100% 100% 100% 2ch -100% 0% 0% 0%
The initial state at power on is the initial position for each excitation mode when the counter is reset. Reference Voltage Setting Serial Data: (D0 = 0, D1 = 0, D2 = 0)
D5 0 1 0 1 D6 0 0 1 1 Current setting reference voltage (When microstep is 100%) 0.2V 0.134V 0.1V 0.066V
The output current setting reference voltage can be switched between four levels with the serial data. This setting is useful for saving power in the motor powered hold state. Calculating the Set Current Since the reference voltage can be modified (0.2, 0.134, 0.1, and 0.66V) with the serial data, the output current can be set with the reference voltage and the resistor RF connected between the RF pin and ground. IOUT = ( x )/ Example: If the reference voltage is 0.2 V, the set current ratio is 100%, and the RF resistor value is 1, then the output current will be that shown below. IOUT = 0.2V x 100%/1 = 200mA
No.A0438-12/25
LV8044LP
Output Current Vector Locus (With one step normalized to 90 degrees)
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Set Current Ratios in the Different Excitation Modes
STEP 4W1-2 phase (%) 1ch 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 0 10 20 30 39.5 48.5 57.5 65.5 74.0 81.5 85.5 89 93.0 96.5 100 100 100 2ch 100 100 100 96.5 93.0 89 85.5 81.5 74.0 65.5 57.5 48.5 39.5 30 20 10 0 100 0 100 0 74.0 74.0 100 100 100 100 1-2 phase (%) 1ch 0 2ch 100 1-2 phase full torque (%) 1ch 0 2ch 100 1ch 2 phase (%) 2ch
No.A0438-13/25
LV8044LP
2 Phase Excitation (CW mode)
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2 Phase Excitation full torque (CW mode)
1 2-Phase Excitation (CW mode)
No.A0438-14/25
LV8044LP
4W1-2 Phase Excitation (CW mode)
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No.A0438-15/25
LV8044LP
Current Control Operation Specifications * Sine wave increasing direction
STEP
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Set current Coil current Set current
fchop
Current mode
CHARGE
SLOW
FAST
CHARGE
SLOW
FAST
* Sine wave decreasing direction
STEP
Set current
Coil current
Set current
fchop
Current mode
CHARGE
SLOW
FAST
CHARGE
FAST
CHARGE
SLOW
Each of the current modes operates with the follow sequence. * The IC enters charge mode when the chopping oscillation starts. (A period of charge mode is forcibly present in 1/8 of the period, regardless of which of the coil current (ICOIL) and the set current (IREF) is larger.) * In charge mode, the coil current (ICOIL) and the set current (IREF) are compared. If an ICOIL < IREF state exists during the charge period: The IC operates in charge mode until ICOIL IREF. After that, it switches to slow decay mode and then switches to fast decay mode in the last 1/8 of the period. If no ICOIL < IREF state exists during the charge period: The IC switches to fast decay mode and the coil current is attenuated with the fast decay operation until the end of the chopping period. The above operation is repeated. Normally, in the sine wave increasing direction the IC operates in slow (+fast) decay mode, and in the sine wave decreasing direction the IC operates in fast decay mode until the current is attenuated and reaches the set value and the IC operates in slow decay mode.
No.A0438-16/25
LV8044LP
Chopping Frequency Setting (D6 and D7 in the serial data)
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This IC integrates an internal oscillator circuit and allows the chopping frequency used in constant-current control to be switched with the serial data (111***, D6, D7) setting.
Data D6 0 1 0 1 Data D7 0 0 1 1 Chopping frequency 130KHz 65KHz 200KHz 100KHz
Monitor Output Setting (Serial data bits D3, D4, and D5) The signal output from the PI3/MO pin can be switched with the serial data (111, D3, ****) setting.
Data D3 0 1 PI3/MO pin output Photosensor drive output 3 Stepping position detection monitor output
It is also possible to select which of channels 1 and 2 or channels 3 and 4 are output from the monitor pin with the serial data (111*, D4, D5, **) setting. The MO output position used to detect the driver excitation position in microstepping drive mode can also be switched. The state MO = Low is output at the output position.
Data D4 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 Data D5 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 PWM drive mode 4W1-2 phase excitation Channels 3 and 4 monitor/initial position Channels 3 and 4 monitor/1-2 phase position Output held fixed at the high level 2 phase excitation Channels 3 and 4 monitor/initial position 1-2 phase excitation (full torque) Channels 3 and 4 monitor/initial position 2 phase excitation 4W1-2 phase excitation Channels 1 and 2 monitor/initial position Channels 1 and 2 monitor/1-2 phase position Channels 3 and 4 monitor/initial position 1-2 phase excitation (full torque) 2 phase excitation Channels 1 and 2 monitor/initial position Channels 1 and 2 monitor/initial position Channels 1 and 2 excitation mode 2 phase excitation Channels 3 and 4 excitation mode MO output Channels 1 and 2 monitor/initial position
No.A0438-17/25
LV8044LP
Operations
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Basic Set Current Step Switching (STEP pin) and Forward/Reverse Switching (D3 in the serial data)
The IC internal D/A converter advances by 1 bits on the rising edge of the input step pulse. The CW/CCW mode can be switched with the serial data (100, D3, ****) setting. The operation progresses with the position number decreasing in CW mode and increasing in CCW mode. In CW mode, the channel 2 current phase is delayed by 90 degrees relative to the channel 1 current. In CCW mode, the channel 2 current phase is advanced by 90 degrees relative to the channel 1 current.
No.A0438-18/25
LV8044LP
Excitation Mode Switching During Operation (D3 and D4 in the serial data)
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If the excitation mode is switched when power is applied to the motor, the operation follows the sequence shown below. (CW mode)
Before excitation mode switching Excitation mode Position (16) (15) to (9) 4W1-2 phase (8) (7) to (1) 0 (16) 1-2 phase (8) 0 (16) 2 phase full torque 2 phase (8)' 0 (8)' (15) (7) -(1) (15) (7) -(1) (7) (8) 0 -(8) 0 0 4W1-2 phase Step position after excitation mode switching 1-2 phase (8) (8) 0 (8) -(8) 2 phase full torque (8)' (8)' 0 (8)' -(8)' (8)' 0 -(8)' (8)' (8)' (8)' (8)' -(8)' (8)' (8)' -(8)' (8)' (8)' -(8)' 2 phase
No.A0438-19/25
LV8044LP
Output Enable Function (D6 in the serial data)
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When the OE bit in the serial data, D6 (100, ***, D6, *), is set to 0, the output is turned off and set to the high-impedance state at the rise of STB. Since, however, the internal logic circuits operate in this state, the position number will be advanced if a step input is applied. Therefore, when the OE bit (D6) is returned to 1, a level according to the position number advanced by the step input will be output. Counter Reset Function (D5 in the serial data)
When the reset bit in the serial data, D5 (100, **, D5, **), is set to 0, the output goes to the initial state at the rise of STB and the MO output goes low. Then, when the reset bit (D5) is next set to 1, the position number will advance at the next step input.
No.A0438-20/25
LV8044LP
Step Hold Function (D4 in the serial data)
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When the hold bit in the serial data, D4 (100, *, D4, ***), is set to 1, the external step state at that time is held without change as the internal step state. Since the (external) step state is low at the timing of the step hold operation (1) in the figure, the internal step state is held at the low level, and since the (external) step state is high at the timing of the step hold operation (1), the internal step state is held at the high level. When the hold data (D) is set to 0, the internal state is synchronized with the external step signal. The output is held at the state at the point where the step hold was applied and after the step hold is released, it advances with the timing of the next step input (rising edge). As long as the IC is in the hold state, the position number does not advance even if external step pulses are applied.
No.A0438-21/25
LV8044LP
Channels 3 and 4 Driver Circuit (Saturated drive/microstep drive)
Driver Mode Setting (D0 = 0, D1 = 1, D2 = 0)
D7 data value 0 1 Drive mode Saturated drive Microstep drive Pin functions PWM3 STEP2 Notes Used as the channel 3 PWM input pin
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Used as the channels 3 and 4 excitation step input pin
The channels 3 and 4 driver circuit can be switched between the following operating modes by bit D7 in the serial data (010, ****, D7). (1) Two saturated mode driver channels (2) One microstep drive stepping motor driver channel Microstep Drive Stepping Motor Driver The basic functionality provided is identical to that of the channels 1 and 2 stepping motor driver. See section 10-2 for details on the serial data settings. PWM Saturated Mode Driver Channel 3 Truth Table (PWM mode: D0 = 1, D1 = 1, D2 = 0)
Input ST Low High High High High High High PWM3 * Low Low Low Low High High D3 * 0 1 0 1 * * D4 * 0 0 1 1 * * D7 * * * * * 0 1 OUT3A OFF OFF High Low Low Low OFF Output OUT3B OFF OFF Low High Low Low OFF Standby mode Output off CW (forward) CCW (reverse) Brake SLOW DECAY (brake) FAST DECAY (output off) Operating mode
Channel 4 Truth Table (PWM mode: D0 = 1, D1 = 1, D2 = 0)
Input ST Low High High High High High High PWM4 * Low Low Low Low High High D5 * 0 1 0 1 * * D6 * 0 0 1 1 * * D7 * * * * * 0 1 OUT4A OFF OFF High Low Low Low OFF Output OUT4B OFF OFF Low High Low Low OFF Standby mode Output off CW (forward) CCW (reverse) Brake SLOW DECAY (brake) FAST DECAY (output off) Operating mode
*: Don't care
No.A0438-22/25
LV8044LP
Channels 5 and 6 Driver Circuit (Constant-current drive)
Output Function
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When the channels 5 and 6 driver circuit is used to drive an actuator, it can be controlled either from the serial data or from the IN51, IN52, IN61, and IN62 parallel signals. When the parallel input signals IN51 (IN61)/IN52 (IN62) are in the low/low state (note that since these inputs are pulled down internally in the IC, the open/open state can also be used), the output mode will be determined by the serial data. If the parallel input signals are in any state other than the above, the serial data will be ignored and the output mode will be determined by the parallel inputs. Truth Table (Channel 5: D0 = 1, D1 = 0, D2 = 1)
Parallel input IN51 IN52 D3 0 Low Low 1 0 1 High Low High Low High High * * * Serial data D4 0 0 1 1 * * * OUT5A OFF High Low Low High Low Low Outputs OUT5B OFF Low High Low Low High Low Standby mode CW (forward) CCW (reverse) Brake CW (forward) CCW (reverse) Brake Mode
Truth Table (Channel 6: D0 = 0, D1 = 0, D2 = 1)
Parallel input IN61 IN62 D5 0 Low Low 1 0 1 High Low High Low High High * * * Serial data D6 0 0 1 1 * * * OUT6A OFF High Low Low High Low Low Outputs OUT6B OFF Low High Low Low High Low Standby mode CW (forward) CCW (reverse) Brake CW (forward) CCW (reverse) Brake Mode
*: Don't care
No.A0438-23/25
LV8044LP
Constant-Current Control Reference Voltage Setting (D0 = 1, D1 = 0, D2 = 1, D3 = 0 (channel 5) or D3 = 1 (channel 6))
D4 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 D5 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 D6 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 D7 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1
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Current setting reference voltage 0.300V 0.200V 0.190V 0.180V 0.170V 0.165V 0.160V 0.155V 0.150V 0.145V 0.140V 0.135V 0.130V 0.120V 0.110V 0.100V
The constant-current setting for channels 5 and 6 can be set individually for each channel. (When D3 is 0, channel 5 is set, and when D3 is 1, channel 6 is set.) The constant-current output value is set by the constant-current reference voltage set with the serial data and the value of the resistor (referred to as "RF" here) connected to the RF5 or RF6 pin. The formula below is used to calculated the constant-current output value. = /
No.A0438-24/25
LV8044LP
Photosensor Drive Circuit (PI1, PI2, and PI3)
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The photosensor drive circuit has open-drain outputs. The output is controlled (set to on or off) by a bit in the serial data (0 or 1). Truth Table
Input ST Low High High High High High High D3 * 0 1 * * * * D4 * * * 0 1 * * D5 * * * * * 0 1 PI1 OFF OFF Low * * * * Output PI2 OFF * * OFF Low * * PI3 OFF * * * * OFF Low Standby mode Off On Off On Off On Drive circuit
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This catalog provides information as of March, 2007. Specifications and information herein are subject to change without notice. PS No.A0438-25/25

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