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Ordering number : ENA0612
Bi-CMOS LSI
LV8743V
Overview
PWM Constant-Current Control Stepping Motor Driver and Switching Regulator Controller
The LV8743V is a PWM constant-current control stepping motor driver and switching regulator controller IC.
Features
* Provides a single PWM constant-current control stepping motor driver circuit * Two switching regulator controller circuits * Can control stepping motors with up to W1-2 phase commutation * Built-in high-precision reference voltage circuit * Timer/latch type short circuit protection circuit * Built-in high and low side regenerative diodes * Thermal shutdown circuit
Specifications
Absolute Maximum Ratings at Ta = 25C
Parameter Maximum supply voltage Symbol VM max VCC max Output voltage Driver output peak current Driver output continuous current Regulator output current Allowable power dissipation VO max MDIO peak MDIO max SWIO max Pd max1 Pd max2 Operating temperature Storage temperature Topr Tstg Independent IC Mounted on a circuit board.* tw 10ms, duty 20% Conditions Ratings 40 6 40 800 500 120 0.5 2.8 -20 to +85 -55 to +150 Unit V V V mA mA mA W W C C
* Specified circuit board : 90x90x1.7mm3 : 2-layer glass epoxy printed circuit board
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.
22807 MS PC 20060516-S00009 No.A0612-1/21
LV8743V
Recommended Operating Ratings at Ta = 25C
Parameter Supply voltage range Symbol VM VCC Logic input voltage VREF1 input voltage Regulator output voltage Regulator output current Error amplifier input voltage Timing capacitor Timing resistor Triangle wave frequency VIN VREF1 VO IO VOA CT RT FOSC Conditions Ratings 10 to 35 4.5 to 5.5 0 to VCC+0.3 0 to 3 10 to VM 0 to 100 0 to 3 100 to 15000 5 to 50 10 to 800 Unit V V V V V mA V pF k kHz
Electrical Characteristics at Ta = 25C, VM = 24V, VCC = 5V, VREF1 = 1.5V
Parameter Overall Characteristics VM current consumption VCC current consumption VCC low-voltage cutoff voltage Low-voltage cutoff hysteresis Thermal shutdown temperature Thermal shutdown hysteresis Motor Drivers [Charge pump block] Step-up voltage Rise time Oscillator frequency [Output block] Output on resistance Ron1 Ron2 Output leakage current Diode forward voltage [Logic input block] Logic pin input current IINL IINH Logic high-level input voltage Logic low-level input voltage [Current control block] VREF input current CR pin current MD pin voltage Current setting comparator threshold voltage IREF1 ICR VMD VHH VLH VHL VREF1 = 1.5V CR = 1.0V MD = open VREF1 = 1.5V, IO = H, I1 = H VREF1 = 1.5V, IO = L, I1 = H VREF1 = 1.5V, IO = H, I1 = L -0.5 -1.6 3.21 0.291 0.191 0.093 -1.25 3.38 0.300 0.200 0.100 -0.9 3.55 0.309 0.209 0.107 A mA V V V V VINH VINL VIN = 0.8V VIN = 5V 3 30 2.0 0.8 8 50 15 70 A A V V IOleak VD IO = 300mA, sink side IO = -300mA, source side VO = 35V ID = -300mA 1.0 1.1 1.5 1.4 1.8 50 1.3 A V VGH tONG Fchop VM = 24V, VCC = 5V VGH = 10F 90 28.3 28.8 50 120 29.3 100 150 V ms kHz IM ICC VthVCC VthHIS TSD TSD Design guarantee Design guarantee PS = High, no load PS = High, no load 3.2 60 2.5 3.5 3.5 110 180 40 3.5 4.5 3.8 160 mA mA V mV C C Symbol Conditions min Ratings typ max Unit
Switching Regulator Controller [Reference voltage block] Output voltage Input stability Load stability [Triangle wave oscillator block] Oscillator frequency Frequency stability Current setting pin voltage FOSC FDV VRT RT = 10k, CT = 200pF VM = 10 to 35V RT = 10k 0.89 360 400 1 0.96 440 5 1.03 kHz % V VREGS VDLI VDLO Iregs = -1mA VM = 10 to 35V Iregs = 0 to -3mA 2.475 2.500 2.525 10 10 V mV mV
Continued on next page.
No.A0612-2/21
LV8743V
Continued from preceding page. Parameter [Protection circuit block] Comparator threshold voltage Standby voltage Source current Threshold voltage Latch voltage [Soft start circuit block] Source current Latch voltage ISOFT VltSOFT VSOFT = 0V ISOFT = 40A 1.15 1.45 1.75 100 A mV VthFB VstSCP ISCP VthSCP VltSCP ISCP = 40A FB3, FB4 ISCP = 40A VSCP = 0V 1.5 1.55 2.4 1.7 1.38 1.53 1.68 100 3.3 1.85 100 V mV A V mV Symbol Conditions min Ratings typ max Unit
[Low input voltage malfunction prevention circuit] Threshold voltage Hysteresis voltage [Error amplifier block] Input offset voltage Input offset current Input bias current Open-loop gain Common-mode input voltage range Common-mode rejection ratio Maximum output voltage Minimum output voltage Output sink current Output source current [PWM comparator block] Input threshold voltage (Fosc = 10kHz) Input bias current Maximum duty cycle [Output block] Output on resistance Leakage current Ron ILEAK IO = 75mA VO = 35V 7 10 5 A VT100 VT0 IBDT Don Duty cycle = 100% Duty cycle = 0% DT = 0.4V With the VREGS voltage divided by 17k and 8k resistors 57 67 0.90 0.45 0.96 0.48 1.02 0.51 1 77 V V A % Vio Iio Iib AV VCM CMRR VOH VOL Isi Iso FB = 2.5V FB = 2.5V 300 45 4.5 VM = 10 to 35V 80 5.0 0.2 600 75 0.5 1000 105 85 3.0 6 30 100 mV nA nA dB V dB V V A A VUT VHIS 8.4 240 8.8 340 9.2 440 V mV
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.A0612-3/21
LV8743V
3.5
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
2.8
2.5
Two-layer circuit board 2 *2
2.0 2
1.5
1.46 1.04
1.0
0.5
Independent IC
0.5 0.26
0 - 20
0
20
40
60
80
100
Ambient temperature, Ta - C
Substrate Specifications (Substrate recommended for operation of LV8743V) Size : 90mm x 90mm x 1.7mm (2-layer substrate [2S0P]) Material : Glass epoxy Copper wiring density : L1 = 80% / L2 = 90%
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.A0612-4/21
LV8743V
Pin Assignment
CR2 1 PHA2 2 I12 3 IO2 4 PS 5 PGND1 6 GND 7 OUT2B 8 RNF2 9 OUT2A 10 VMM 11 OUT1B 12 RNF1 13 OUT1A 14 PGND2 15 VG 16 VM 17 CP2 18 CP1 19 VCC 20 VREF1 21 CR1 22 Top view
44 GND 43 OUT4 42 OUT3 41 VMSW 40 INV4 39 FB4 38 DT4 37 NON4 36 INV3 35 FB3
LV8743V
34 DT3 33 NON3 32 SOFT 31 SCP 30 CREG 29 RT 28 CT 27 VREGS 26 MD 25 PHA1 24 I11 23 IO1
PCA01177
No.A0612-5/21
Block Diagram
CP1 CP2
VMM CT VREGS OUT2A OUT2B RNF2 OUT4 OUT3 RT
VG
RNF1
OUT1A
OUT1B
VM Triangle wave oscillator
Charge pump
2.5V reference voltage
Internal reference voltage
VMSW CREG
VCC
+ -
Pre-output stage
Pre-output stage
Pre-output stage
Pre-output stage
+ + -
5V Constant Current + + +
LV8743V
PGND1 Output control logic
One-shot multivibrator Blanking time
NON3 NV3 FB3
PGND2
One-shot multivibrator Blanking time
Output control logic
+ NON4
+ Current selecting D/A converter
+ + -
NV4 FB4 SOFT
VREF1
+ -
Current selecting D/A converter
+
+
GND PS
TSD
Protection circuit LVS
SCP
LVS
GND CR2 PS CR2 PHA2 I02 I12 DT3 DT4
I01 I11
PHA1
MD
No.A0612-6/21
LV8743V
Pin Functions
Pin No. 11 14 12 13 10 8 9 6 21 23 24 25 22 4 3 2 1 26 5 20 44 41 27 33 36 35 34 42 37 40 39 38 43 28 29 32 31 17 15 16 19 18 30 7 VMM OUT1A OUT1B RNF1 OUT2A OUT2B RNF2 PGND1 VREF1 I01 I11 PHA1 CR1 I02 I12 PHA2 CR2 MD PS VCC GND VMSW VREGS NON3 INV3 FB3 DT3 OUT3 NON4 INV4 FB4 DT4 OUT4 CT RT SOFT SCP VM PGND2 VG CP1 CP2 CREG GND Driver channel 2 output phase switching input Driver channel 2 off time setting RC circuit connection Driver system mixed decay setting Driver system enable input Control system power supply Ground Switching regulator control system power supply Regulator system reference voltage output Regulator system error amplifier 3 noninverting input Regulator system error amplifier 3 inverting input Regulator system error amplifier 3 output Regulator system output 3 maximum duty setting Output 3 Regulator system error amplifier 4 noninverting input Regulator system error amplifier 4 inverting input Regulator system error amplifier 4 output Regulator system output 4 maximum duty setting Output 4 Regulator system external timing capacitor connection Regulator system external timing resistor connection Soft startup setting Regulator system timer/latch setting Power supply Power system ground Charge pump capacitor connection Charge pump capacitor connection Charge pump capacitor connection Internal power supply stabilization capacitor connection Ground Driver channel 1 output phase switching input Driver channel 1 off time setting RC circuit connection Driver channel 2 output current setting input Pin Driver output system power supply Driver channel 1 OUTA output pin Driver channel 1 OUTB output pin Driver channel 1 current sensing resistor connection Driver channel 2 OUTA output pin Driver channel 2 OUTB output pin Driver channel 2 current sensing resistor connection Driver output system ground Driver output current setting reference voltage input Driver channel 1 output current setting input Description
No.A0612-7/21
LV8743V
Equivalent Circuits
Pin No. 23 24 25 5 4 3 2 I01 Il1 PHA1 PS I02 I12 PHA2 Pin Equivalent Circuit
VCC
5k
100k
GND
8 9 10 11 12 13 14 OUT2B RNF2 OUT2A VMM OUT1B RNF1 OUT1A
11
14 10
12 8
13 9
19 16 17 18 CP1 VG VM CP2
19
17
18
16
VCC
200k
GND
Continued on next page.
No.A0612-8/21
LV8743V
Continued from preceding page. Pin No. 21 Pin VREF1 Equivalent Circuit
VCC
4pF
500
500
GND
22 1 CR1 CR2
VCC 100k
10k 500
500
25k
500
500
500
15k GND 50k
26
MD
VCC 100k 30k 500 500
63k GND 50k
Continued on next page.
No.A0612-9/21
LV8743V
Continued from preceding page. Pin No. 41 30 Pin VMSW CREG Equivalent Circuit
41
5V
1k
30
GND
27 VREGS
5V VMSW
GND
33 36 35 37 40 39 NON3 INV3 FB3 NON4 INV4 FB4
5V
VMSW
VMSW
36 40
500 500 500 35 39
500 SOFT GND VMSW 33 37
Continued on next page.
No.A0612-10/21
LV8743V
Continued from preceding page. Pin No. 34 38 DT3 DT4 Pin Equivalent Circuit
5V VMSW
500 500 FB GND
29 28 RT CT
500 CT
5V
1V
500
500
500
500
GND VMSW 28 29
42 43
OUT3 OUT4
5V
VMSW
GND
Continued on next page.
No.A0612-11/21
LV8743V
Continued from preceding page. Pin No. 32 Pin SOFT Equivalent Circuit
5V
500 GND VMSW
31
SCP
5V
500 GND VMSW
No.A0612-12/21
LV8743V
Stepping Motor Driver (1) STM output control logic
Parallel input PS Low High High PHA * Low High OUTA Off Low High Output OUTB Off High Low Current direction Standby OUTBOUTA OUTAOUTB
(2) STM constant-current settings
I0 High Low High Low I1 High High Low Low Output current (VREF1/5) /RNF = IO (100%) ((VREF1/5) /RNF) x 2/3 = IO (100%) x 2/3 ((VREF1/5) /RNF) x 1/3 = IO (100%) x 1/3 0
The STM driver constant-current control settings consist of the VREF1 voltage setting, the I0 and I1 current settings, and the resistor (RNF) connected between RNF and ground. The current is set according to the following equation. Iconst [A] = ((VREF1 [V] /5) /RNF []) x attenuation ratio Here VREF1 = 1.5V, I0 = I1 = high, and RNF = 1. Iconst can be determined from the following equation. Iconst = 1.5V/5/1 x 1 = 0.3A (3) Procedure for setting the CR pin constants (the off period and noise canceller time settings) The following are set by connecting a capacitor and resistor to the CR pin. (a) The switching off time (Toff) in constant-current control mode (b) The noise cancellation time (Tn) used to prevent malfunctions due to spike noise when switching from decay to charge mode. Use the following equations to determine the values for the capacitor and resistor. (a) Switching off time (Toff) Toff -CxRxln (1.5/4.8) [sec] (b) Noise cancellation time (Tn) Tn CxRxln {(1.5 - RI)/(4.0 - RI)} [sec] I : The CR pin charge current (1.25mA, typical)
No.A0612-13/21
LV8743V
(4) Constant-current control timing chart
Set current
Output current
CR
MD pin level
30%
70%
OUTA
OUTB
CHARGE FAST
SLOW
When the MD pin is in the open state, the LV8743V's stepping motor constant-current control attenuates the current in fast decay mode for 30% of the off time determined by the CR pin RC circuit, and in slow decay mode for 70% of that time. This mixed decay ratio can be adjusted to an appropriate value by applying an appropriate voltage to the MD pin from an external circuit. If the MD pin is shorted to VCC, operation is locked in slow decay mode for this period, and if it is shorted to ground, operation is locked in fast decay mode.
No.A0612-14/21
LV8743V
(5) Output current vector locus (one step is normalized to 90 degrees)
2-phase commutation position 100.0
Channel 1 phase current ratio
66.7
33.3
0.0 0.0 33.3 66.7 100.0 Channel 2 phase current ratio
(6) Current waveforms in the various commutation modes 2-phase commutation (Channels 1 and 2, CW mode)
I01,I11 PHA1 I02,I12
H
H
PHA2
(%) IOUT1 100 0 (%) -100 100 IOUT2 0 -100
No.A0612-15/21
LV8743V
1-2 phase commutation (Channels 1 and 2, CW mode)
I01 I11 PHA1
I02 I12
PHA2 (%) 100 IOUT1 0 -100 (%) 100 0 IOUT2 -100
W1-2 phase commutation (Channels 1 and 2, CW mode)
I01 I11 PHA1 I02
I12 PHA2 (%) 100 IOUT1 0 -100 (%) 100 IOUT2 0 -100
No.A0612-16/21
Maximum duty setting pin VM
VMSW
Triangle wave
DT 0.96V 5V Triangle wave oscillator
Switching Regulator Controller (1) Regulator block diagram
CT
RT
5V Internal reference voltage 0.48V
REGS
2.5V
2.5V reference voltage
5V OUT
Constant Current
1.45A
LV8743V
NON 5V
Error amplifier 5V + + 5V 1.55V + High during protection circuit operation
REGOUT
FB +
operation
PWM comparator 5V + FB comparator High during 5V LVS -
Constant Current
LVS 5V Protection circuit
2.4A
SOFT INV
SCP
Soft start setting pin Timer/latch setting pin
No.A0612-17/21
LV8743V
(2) Timing chart
Short circuit protection circuit reference voltage Oscillator triangle wave output (CT) Maximum duty input voltage (DT) Error amplifier output (FB) Regulator output (OUT) Triangle wave conversion output (1) SCP pin waveform Short circuit protection comparator output Latch output SOFT pin waveform
1.7V
1.53V 0.96V 0.48V
(2)
VMSW supply voltage
9.2V
No.A0612-18/21
LV8743V
(3) SOFT pin constant setting (Soft start setting) The switching regulator's soft start operation is set by the value of the capacitor connected between the SOFT pin and ground. Use the following equation to determine the value of this capacitor. Soft start time : Tsoft Tsoft C x V/I [sec] V : Error amplifier noninverting input voltage (NON3/NON4) I : SOFT pin charge current 1.45A, typical
(4). SCP pin constant setting (Timer/latch setting) The time until the output is turned off when the regulator output is shorted is set with the value of the capacitor connected between the SCP pin and ground. Use the following equation to determine the value of this capacitor. Timer/latch operating time : Tscp Tscp C x V/I [sec] V : Threshold voltage (1.7V, typical) I : SCP pin charge current (2.4A, typical)
(5) RT pin constant setting (Capacitor charge/discharge current setting) The charge/discharge current for the capacitor connected to the CT pin used to generate the triangle wave is set with the value of the resistor connected between the RT pin and ground. Use the following equation to determine the value of this resistor. Charge/discharge current : Irt Irt V/R [A] V : The R pin voltage (0.96V, typical)
(6) CT pin constant setting (Triangle wave oscillator frequency setting) The triangle wave oscillator frequency can be set with the value of the capacitor connected between the CT pin and ground. (Note that this setting operates in conjunction with the RT pin charge/discharge current setting.) Use the following equation to determine the value of this capacitor. Triangle wave oscillator frequency : Fosc Fosc 1/{2xCxV/I} [Hz] V : Triangle wave amplitude (0.48V, typical when Fosc = 10kHz) * : Note that the amplitude increases with the frequency. I : Capacitor charge/discharge current (See item (5), RT pin constant setting.)
No.A0612-19/21
LV8743V
Application Circuit
30k
1 CR2
680pF
GND 44 OUT4 43 OUT3 42 VMSW 41 INV4 40 FB4 39 DT4 38 NON4 37 INV3 36
5.6k 8k 17k 5.6k
2 PHA2
Logic input
3 I12 4 IO2 5 PS 6 PGND1 7 GND 8 OUT2B
1
9 RNF2
LV8743V
10 OUT2A 11 VMM 12 OUT1B
1
FB3 35 DT3 34 NON3 33 SOFT 32 SCP 31
2.2F 5.6k 0.01F 8k 17k 5.6k
13 RNF1 14 OUT1A
10F
15 PGND2 16 VG 17 VM
CREG 30
0.1F
-+
24V
RT 29 CT 28
39k 330pF
10F 0.1F
0.1F
18 CP2 19 CP1 20 VCC 21 VREF1 22 CR1
VREGS 27
0.1F
MD 26 PHA1 25 I11 24 IO1 23
-+
0.1F 1.5V
-+
680pF
30k
Logic input
5V
No.A0612-20/21
LV8743V
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 February, 2007. Specifications and information herein are subject to change without notice. PS No.A0612-21/21

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