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Ordering number : ENA0814A
Bi-CMOS LSI
LV8741V
Overview
PWM Constant-Current Control Stepping Motor Driver
The LV8741V is a PWM current-control stepping motor driver IC.
Features
* Single-channel PWM current control stepping 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 = 25C, IO = 1.5A) * Excitation mode can be set to 2-phase, 1-2 phase full torque, 1-2 phase or W1-2 phase * Excitation step proceeds only by step signal input * Motor holding current selectable in four steps * IO max = 1.5A * Output-stage push-pull structure enabling high-speed operation * Output short-circuit protection circuit (selectable from latch-type or auto reset-type) incorporated * Thermal shutdown circuit and power supply monitor circuit incorporated * Supports control power supply VCC = 3.3V
Specifications
Absolute Maximum Ratings at Ta = 25C
Parameter Supply voltage 1 Supply voltage 2 Output peak current Output current Logic input voltage EMO input voltage Symbol VM max VCC max IO peak IO max VIN VEMO tw 10ms, duty 20% Conditions Ratings 38 6 1.75 1.5 -0.3 to VCC+0.3 -0.3 to VCC+0.3 Unit V V A A V V
Continued on next page.
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.
90507 MS PC / 61307 MS PC 20070411-S00007 No.A0814-1/24
LV8741V
Continued from preceding page. Parameter Allowable power dissipation 1 Allowable power dissipation 2 Operating temperature Storage temperature *1 Specified circuit board : 90x90x1.7mm3 Symbol Pd max1 Pd max2 Topr Tstg : glass epoxy printed circuit board Independent IC * Our recommended two-layer substrate *1, *2 Conditions Ratings 0.55 2.9 -20 to +85 -55 to +150 Unit W W C C
*2 For mounting to the backside by soldering, refer the precautions.
Recommended Operating Conditions at Ta = 25C
Parameter Supply voltage range 1 Supply voltage range 2 VREF input voltage range Symbol VM VCC VREF Conditions Ratings 9.5 to 35 2.7 to 5.5 0 to VCC-1.8 Unit V V V
Electrical Characteristics at Ta = 25C, VM = 24V, VCC = 5V, VREF = 1.5V
Parameter Standby mode current drain 1 Current drain 1 Standby mode current drain 2 Current drain 2 VCC low-voltage cutoff voltage Low-voltage hysteresis voltage Thermal shutdown temperature Thermal hysteresis width Symbol IMstn IM ICCstn ICC VthVCC VthHIS TSD TSD Design guarantee Design guarantee ST = "L" ST = "H", OE = "H", no load ST = "L" ST = "H", OE = "H", no load 2.2 100 Conditions min Ratings typ 150 0.75 110 2.5 2.35 150 180 40 max 200 1 160 3 2.5 200 A mA A mA V mV C C A V V A A V 0.8 Step 0(When initialized : channel 1 comparator level) Step 1 (Initial state+1) Step 2 (Initial state+2) Step 3 (Initial state+3) 1-2 phase drive Step 0 (When initialized: channel 1 comparator level) Step 2 (Initial state+1) 1-2 phase (full torque) drive Step 0 (Initial state, channel 1 comparator level) Step 2 (Initial state+1) 2 phase drive Chopping frequency Current setting reference voltage Fchop VRF00 VRF01 VRF10 VRF11 VREF pin input current Iref Step 2 RCHOP = 20k ATT1 = L, ATT2 = L ATT1 = H, ATT2 = L ATT1 = L, ATT2 = H ATT1 = H, ATT2 = H VREF = 1.5V 0.485 0.485 45 0.485 0.323 0.237 0.155 -0.5 0.5 0.5 62.5 0.5 0.333 0.25 0.167 0.515 0.515 75 0.515 0.343 0.263 0.179 V V kHz V V V V A Continued on next page. 0.323 0.485 0.333 0.5 0.343 0.515 V V 0.485 0.323 0.155 0.485 0.5 0.333 0.167 0.5 0.515 0.343 0.179 0.515 V V V V 0.485 0.5 0.515 V V Unit
Output on-resistance
Ronu Rond
IO = 1.5A, Upper-side on resistance IO = 1.5A, Lower-side on resistance
0.5 0.5
0.8 0.8 50
Output leakage current Diode forward voltage 1 Diode forward voltage 2 Logic pin input current
IOleak VD1 VD2 IINL IINH ID = -1.0A ID = -1.5A VIN = 0.8V VIN = 5V 3 30 2.0 1 1.1 8 50
1.3 1.5 15 70
Logic high-level input voltage Logic low-level input voltage Current selection reference voltage level W1-2-phase drive
VINH VINL
No.A0814-2/24
LV8741V
Continued from preceding page. Parameter Charge pump VREG5 output voltage VG output voltage Rise time Oscillator frequency Output short-circuit protection EMO pin saturation voltage Iemo = 1mA 50 100 mV Vreg5 VG tONG Fosc VG = 1F RCHOP = 20k 90 IO = -1mA 4.5 28 5 28.7 5 125 5.5 29.8 10 150 V V ms kHz Symbol Conditions min Ratings typ max Unit
Package Dimensions
unit : mm (typ) 3333
TOP VIEW 15.0 44 23 SIDE VIEW BOTTOM VIEW
(4.7)
5.6 7.6 (3.5)
1 (0.68)
0.65
0.22
22
0.2
1.7MAX
SIDE VIEW
0.1 (1.5)
0.5
SANYO : SSOP44K(275mil)
No.A0814-3/24
LV8741V
4.0
Pd max - Ta
*1 With components mounted on the exposed die-pad board *2 With no components mounted on the exposed die-pad board
Allowable power dissipation, Pd max - W
3.0
Two-layer circuit board 1 *1
2.90
Two-layer circuit board 2 *2
2.0 2.05 1.51 1.0 1.07
0 - 20
0
20
40
60
80
100
Ambient temperature, Ta - C
Substrate Specifications (Substrate recommended for operation of LV8741V) Size : 90mm x 90mm x 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.
No.A0814-4/24
LV8741V
Pin Assignment
CP2 1 CP1 2 VCC 3 VREG5 4 ATT2 5 ATT1 6 NC 7 EMO 8 CEM 9 EMM 10 RCHOP 11
44 VM 43 VG 42 PGND 41 NC 40 GND 39 NC 38 NC 37 OUT1A 36 VM1 35 RF1 34 OUT1B
LV8741V
MONI 12 RST 13 STP/DC22 14 FR/DC21 15 MD2/DC12 16 NC 17 MD1/DC11 18 DM 19 OE 20 ST 21 VREF 22 Top view 33 OUT2A 32 VM2 31 RF2 30 OUT2B 29 NC 28 NC 27 GND 26 NC 25 NC 24 NC 23 SGND
No.A0814-5/24
Block Diagram
CP2 OUT1A VM2 OUT2A OUT2B
CP1
VG
RF1
OUT1B VM1 RF2
VM
Charge pump
+ -
PGND
Output preamplifier stage
Output preamplifier stage
Output preamplifier stage
MONI Regulator
VREG5
LV8741V
Output control logic + Attenuator (4 levels selectable) Oscillation circuit Current selection (W1-2/1-2/ 1-2Full/2) + Current selection (W1-2/1-2/ 1-2Full/2)
Output preamplifier stage
EMO
CEM
VREF
+ -
VCC
+ -
SGND RCHOP ST ATT1
TSD
LVS ATT2 MD1/ MD2/ FR/ STP/ RST OE DC11 DC12 DC21 DC22 DM EMM
No.A0814-6/24
LV8741V
Pin Functions
Pin No. 36 37 34 35 32 33 30 31 42 12 14 22 18 16 13 20 15 6 5 21 44 3 23 11 19 4 2 1 43 8 10 9 27,40 7, 17, 24, 25, 26, 28, 29, 38, 39, 41 Pin name VM1 OUT1A OUT1B RF1 VM2 OUT2A OUT2B RF2 PGND MONI STP/DC22 VREF MD1/DC11 MD2/DC12 RST OE FR/DC21 ATT1 ATT2 ST VM VCC SGND RCHOP DM VREG5 CP1 CP2 VG EMO EMM CEM GND NC Channel 1 motor power supply pin Channel 1 OUTA output pin Channel 1 OUTB output pin Channel 1 current-sense resistor connection pin Channel 2 motor power supply connection pin Channel 2 OUTA output pin Channel 2 OUTB output pin Channel 2 current-sense resistor connection pin Power system ground Position detection monitor pin STM STEP signal input pin/DCM2 output control input pin Constant current control reference voltage input pin STM excitation mode switching pin/DCM1 output control input pin STM excitation mode switching pin/DCM1 output control input pin Reset signal input pin Output enable signal input pin STM forward/reverse rotation signal input pin/DCM2 output control input pin Motor holding current switching pin Motor holding current switching pin Chip enable pin Motor power supply connection pin Logic power supply connection pin Signal system ground Chopping frequency setting resistor connection pin Drive mode (STM/DCM) switching pin Internal power supply capacitor connection pin Charge pump capacitor connection pin Charge pump capacitor connection pin Charge pump capacitor connection pin Output short-circuit state warning output pin Overcurrent mode switching pin Pin to connect the output short-circuit state detection time setting capacitor Ground No Connection (No internal connection to the IC) Description
No.A0814-7/24
LV8741V
Equivalent Circuits
Pin No. 5 6 10 13 14 15 16 18 19 20 21 ATT2 ATT1 EMM RST STP/DC22 FR/DC21 MD2/DC12 MD1/DC11 DM OE ST Pin Equivalent Circuit
VCC
5k
100k
GND
30 31 32 33 34 35 36 37 42 OUT2B RF2 VM2 OUT2A OUT1B RF1 VM1 OUT1A PGND
36 32
VCC
37 33
34 30
GND 42
1 2 43 44 CP2 CP1 VG VM
35 31
2
44
1
43
VCC
100
GND
Continued on next page.
No.A0814-8/24
LV8741V
Continued from preceding page. Pin No. 22 Pin VREF Equivalent Circuit
VCC
500
GND
4 VREG5
VM
2k
78k
26k GND
12 MONI
VCC
500
GND
Continued on next page.
No.A0814-9/24
LV8741V
Continued from preceding page. Pin No. 8 EMO Pin Equivalent Circuit
VCC
GND
9 CEM
VCC
500 GND
11
RCHOP
VCC
GND 1k
No.A0814-10/24
LV8741V
Input Pin Function (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 Low or Open High Mode Standby mode Operating mode Internal regulator Standby Operating Charge pump Standby Operating
(2) Drive mode switching pin function The IC drive mode is switched by setting the DM pin. In STM mode, stepping motor channel 1 can be controlled by the CLK-IN input. In DCM mode, DC motor channel 2 or stepping motor channel 1 can be controlled by parallel input. Stepping motor control using parallel input is 2-phase or 1-2 phase full torque.
DM Low or Open High Drive mode STM mode DCM mode Application Stepping motor channel 1 (CLK-IN) DC motor channel 2 or stepping motor channel 1 (parallel)
STM mode (DM = Low or Open) (1) STEP pin function
Input ST Low High High STP * Standby mode Excitation step proceeds Excitation step is kept Operating mode
(2) Excitation mode setting function
MD1 MD2 Excitation mode Channel 1 Low High Low High Low Low High High 2 phase excitation 1-2 phase excitation (full torque) 1-2 phase excitation W1-2 phase excitation 100% 100% 100% 100% Initial position Channel 2 -100% 0% 0% 0%
This is the initial position of each excitation mode in the initial state after power-on and when the counter is reset.
(3) Constant-current control reference voltage setting function
ATT1 Low High Low High ATT2 Low Low High High Current setting reference voltage VREF/3x100% VREF/3x67% VREF/3x50% VREF/3x33%
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 x Voltage setting ratio)/RF resistor (Example) When VREF = 1.5V, setting current ratio = 100% [(ATT1, ATT2) = (Low, Low)] and RF resistor = 0.5, the following output current flows : IOUT = 1.5V/3 x 100%/0.5 = 1A
No.A0814-11/24
LV8741V
(4) Reset function
RST High Low Operating mode Normal operation Reset state
RST STEP MONI
RESET
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. (5) Output enable function
OE Low High Operating mode Output OFF Output ON
OE STEP MONI
Power save mode
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.
No.A0814-12/24
LV8741V
(6) Forward/reverse switching function
FR Low High Operating mode Clockwise (CW) 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. (7) 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.
100
Chopping frequency settings (reference data)
80
Fchop - kHz
60
40
20
0 0 10 20 30 40 50 60
RCHOP - k
PCA01883
No.A0814-13/24
LV8741V
(8) Output current vector locus (one step is normalized to 90 degrees)
100.0 4 3
2 (2-phase/ 1-2 phase full torque)
Channel 1 phase current ratio (%)
66.7 2
33.3
1
0 0.0 0.0 33.3 66.7 Channel 2 current ratio (%) 100.0
Setting current ration in each excitation mode
STEP W1-2 phase (%) Channel 1 0 1 2 3 4 0 33.3 66.7 100 100 Channel 2 100 100 66.7 33.3 0 100 0 100 0 66.7 66.7 100 100 100 100 1-2 phase (%) Channel 1 0 Channel 2 100 1-2 phase full torque (%) Channel 1 0 Channel 2 100 2-phase (%) Channel 1 Channel 2
No.A0814-14/24
LV8741V
(9) 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 full torque (CW mode)
STEP
MONI (%) 100 I1 0 -100 (%) 100 I2 0 -100
No.A0814-15/24
LV8741V
1-2 phase excitation (CW mode)
STEP
MONI (%) 100 I1 0 -100 (%) 100 I2 0 -100
W1-2 phase excitation (CW mode)
STEP
MONI (%) 100
I1
0
-100 (%) 100
I2
0
-100
No.A0814-16/24
LV8741V
(10) 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
FAST
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.(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 (ICOILNo.A0814-17/24
LV8741V
DCM Mode (DM-High) (1) DCM mode output control logic
Parallel input DC11 (21) Low High Low High DC12 (22) Low Low High High OUT1 (2) A OFF High Low Low Output OUT1 (2) B OFF Low High Low Standby CW (Forward) CCW (Reverse) Brake Mode
(2) Reset function
RST High or Low Operating mode Reset operation not performed MONI High output
The reset function does not operate in DCM mode. In addition, the MONI output is High, regardless of the RST pin state. (3) Output enable function
OE Low High Operating mode Output OFF Output ON
When the OE pin is set Low, the output is forced OFF and goes to high impedance. When the OE pin is set High, output conforms to the control logic. (4) Current limit control time chart
Set current
Current mode
Coil current Forced CHARGE section
fchop
Current mode
CHARGE
SLOW
(5) Current limit reference voltage setting function
ATT1 Low High Low High ATT2 Low Low High High Current setting reference voltage VREF/3x100% VREF/3x67% VREF/3x50% VREF/3x33%
The voltage input to the VREF pin can be switched to four-step settings as the reference voltage for setting the current limit.
Set current calculation method The reference voltage is set by the voltage applied to the VREF pin and the two inputs ATT1 and ATT2. The current limit can be set from this reference voltage and the RF resistance value. Ilimit = (VREF/3 x Voltage setting ratio) /RF resistance (Example) When VREF = 1.5V, setting current ratio = 100% [(ATT1, ATT2) = (Low, Low)] and RNF1 (2) = 0.5, the current limit value is as follows : Ilimit = 1.5V/3 x 100%/0.5 = 1A
No.A0814-18/24
LV8741V
(6) Typical current waveform in each excitation mode when stepping motor parallel input control 2-phase excitation (CW mode)
DC11 DC12 DC21 DC22
(%) 100 lOUT1 0 -100 (%) 100 lOUT2 0 -100
1-2 phase excitation full torque (CW mode)
DC11
DC21
DC12
DC22 (%) 100 l1 0 -100 (%) 100 l2 0 -100
No.A0814-19/24
LV8741V
Output short-circuit protection circuit To protect IC from damage due to short-circuit of the output caused by lightening or ground fault, the output short-circuit protection circuit to put the output in the standby mode is incorporated. (1) Output short-circuit protection operation changeover function Changeover to the output short-circuit protection of IC is made by the setting of OCPM pin.
EMM Low or Open High State Auto reset method Latch method
(2) Auto reset method When the output current is below the output short-circuit protection current, the output is controlled by the input signal. When the output current exceeds the detection current, the switching waveform as shown below appears instead. (When the resistor inserted between RCHOP-GND is 20k)
Exceeding the over-current detection current ON Output current OFF ON OFF ON
1V OCP voltage Tscp
1 to 2s
256s (TYP)
When detecting the output short-circuit state, the short-circuit detection circuit is activated. When the short-circuit detection circuit operation exceeds the timer latch time described later, the output is changed over to the standby mode and reset to the ON mode again in 256s (TYP). In this event, if the overcurrent mode still continues, the above switching mode is repeated till the overcurrent mode is canceled. (3) Latch method Similarly to the case of automatic reset method, the short-circuit detection circuit is activated when it detects the output short-circuit state. When the short-circuit detection circuit operation exceeds the timer latch time described later, the output is changed over to the standby mode. In this method, latch is released by setting PS = "L" (4) Output short-circuit condition warning output pin EMO, warning output pin of the output short-circuit protection circuit, is an open-drain output. EMO outputs ON when output short-circuit is detected. (5) Timer latch time (Tscp) The time to output OFF when an output short-circuit occurs can be set by the capacitor connected between the CEM pin and GND. The capacitor (C) value can be determined as follows : Timer latch : Tscp Tscp Td+C x V/I [sec] Td : Internal delay time TYP 4s V : Threshold voltage of comparator TYP 1V I : CEM charge current TYP 2.5A
The Tscp time must be set so as not to exceed 80% of the chopping period. The CEN pin must be connected to (S) GND when the output short protection funtion is not to be used.
No.A0814-20/24
LV8741V
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. If the VG pin voltage is not boosted sufficiently, the output cannot be controlled, so be sure to provide a wait time of tONG or more after setting the ST pin High before starting to drive the motor.
ST
VG pin voltage VM+VREG5 VM+4V
VM
tONG
VG Pin Voltage Schematic View Recommended Power-on Sequence Provide a wait time of 10s or more after the VCC power supply rises before supplying the motor power supply. Provide a wait time of 10s or more after the motor power supply rises before setting the ST pin High.
VCC VM
10s or longer 10s or longer
ST
No.A0814-21/24
LV8741V
Application Circuits
* Stepping motor driver application circuit example
10F ++-
1 CP2 0.1F -+ 0.1F 2 CP1 3 VCC 4 VREG5 0.1F Logic input 5 ATT2 6 ATT1 7 NC 20k 8 EMO 9 CEM 10 EMM 43k 11 RCHOP 12 MONI 13 RST Logic input 14 STP/DC22 15 FR/DC21 16 MD2/DC12 17 NC 18 MD1/DC11 19 DM 20 OE Logic input 21 ST -+ 22 VREF
VM 44 VG 43
1F PGND 42 NC 41 GND 40 NC 39 NC 38 OUT1A 37 VM1 36 RF1 35 OUT1B 34 OUT2A 33 VM2 32 RF2 31 OUT2B 30 NC 29 NC 28 GND 27 NC 26 NC 25 NC 24 GND 23 0.25 M 0.25
LV8741V
0.1F
The setting conditions for the above circuit diagram example are as follows : * 2-phase excitation (MD1/DC11 = Low, MD2/DS12 = Low) * Auto recovery-type output short-circuit protection function (EMM = Low) * Reset function fixed to normal operation (RST = High) * Output enable function fixed to output ON state (OE = High)
ATT1 L H L H ATT2 L L H H Current setting reference voltage VREF/3x100% VREF/3x67% VREF/3x50% VREF/3x33%
The set current value is as follows : IOUT = (VREF/3 x Voltage setting ratio) /0.25
No.A0814-22/24
LV8741V
* DC motor driver application circuit example
1 CP2 0.1F -+ 0.1F 2 CP1 3 VCC 4 VREG5 0.1F 5 ATT2 6 ATT1 7 NC 20k 8 EMO 9 CEM 10 EMM 43k 1ch 2ch control logic inputs control logic inputs 11 RCHOP 12 MONI 13 RST 14 STP/DC22 15 FR/DC21 16 MD2/DC12 17 NC 18 MD1/DC11 19 DM 20 OE Logic input -+ 21 ST 22 VREF
VM 44 VG 43
10F ++-
1F PGND 42 NC 41 GND 40 NC 39 NC 38 OUT1A 37 VM1 36 RF1 35 OUT1B 34 OUT2A 33 VM2 32 RF2 31 OUT2B 30 NC 29 NC 28 GND 27 NC 26 NC 25 NC 24 GND 23 0.25 M 2ch DC motor M 0.25 1ch DC motor
LV8741V
0.1F
The setting conditions for the above circuit diagram example are as follows : * Auto recovery-type output short-circuit protection function (EMM = Low) * Output enable function fixed to output ON state (OE = High) * Current limit reference voltage setting = 100% (ATT1 = Low, ATT2 = Low) The current limit value is as follows : Ilimit = (VREF/3) /0.25
No.A0814-23/24
LV8741V
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. 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. Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed for volume production. 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 intellctual property rights which has resulted from the use of the technical information and products mentioned above.
This catalog provides information as of September, 2007. Specifications and information herein are subject to change without notice. PS No.A0814-24/24

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