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LV8731V-TLM-H;中文规格书,Datasheet资料

LV8731V-TLM-H;中文规格书,Datasheet资料

Bi-CMOS LSI

PWM Constant-Current Control Stepping Motor Driver

LV8731V

Overview

The LV8731V is a 2-channel H-bridge driver IC that can switch a stepping motor driver, which is capable of micro-step drive and supports 4W 1-2 phase excitation, and two channels of a brushed motor driver, which supports forward, reverse, brake, and standby of a motor. It is ideally suited for driving brushed DC motors and stepping motors used in office equipment and amusement applications.

Features

? Single-channel PWM current control stepping motor driver (selectable with DC motor driver channel 2) incorporated. ? BiCDMOS process IC

? Low on resistance (upper side : 0.3Ω ; lower side : 0.25Ω ; total of upper and lower : 0.55Ω ; Ta = 25°C, I O = 2A) ? Excitation mode can be set to 2-phase, 1-2 phase, W1-2 phase , or 4W1-2 phase ? Excitation step proceeds only by step signal input ? Motor current selectable in four steps

? Output short-circuit protection circuit (selectable from latch-type or auto-reset-type) incorporated ? Unusual condition warning output pins ? No control power supply required

Specifications

Absolute Maximum Ratings at Ta = 25°C

Parameter Symbol

Conditions

Ratings Unit

Supply voltage VM max 36V Output peak current I O peak tw ≤ 10ms, duty 20% 2.5 A Output current I O max 2

A Logic input voltage V IN

-0.3 to +6V MONI/EMO input voltage

Vmoni/Vemo

-0.3 to +6

V

Continued on next page.

LV8731V-TLM-H;中文规格书,Datasheet资料

Parameter Symbol

Conditions

Ratings Unit

Allowable power dissipation Pd max Ta ≤ 85°C * 3.25W Operating temperature Topr -20 to +85°C Storage temperature

Tstg

-55 to +150

°C

* Specified circuit board : 90.0mm ×90.0mm ×1.6mm, glass epoxy 2-layer board, with backside mounting.

Allowable Operating Ratings at Ta = 25°C

Parameter Symbol

Conditions

Ratings Unit

Supply voltage range VM 9 to 32V Logic input voltage V IN 0 to 5.5V VREF input voltage range

VREF

0 to 3

V

Electrical Characteristics at Ta = 25°C, VM = 24V, VREF = 1.5V

Ratings

Parameter Symbol

Conditions

min typ max

Unit

Standby mode current drain IMst ST = “L”

100 400μA Current drain

IM ST = “H”, OE = “L”, with no load 3.2 5mA VREG5 output voltage Vreg5 I O = -1mA 4.5 5 5.5V Thermal shutdown temperature TSD

Design guarantee

150

180

200

°C Thermal hysteresis width ΔTSD Design guarantee 40

°C

Motor driver Ronu I O = 2A, Upper-side on resistance 0.3 0.4Ω Output on resistance

Rond I O = 2A, Lower-side on resistance

0.25

0.33

Ω Output leakage current I O leak 50μA Diode forward voltage VD

ID = -2A

1.2 1.4V I IN L V IN = 0.8V 48 12μA Logic pin input current

I IN H V IN = 5V

3050

70

μA

Logic high-level input voltage V IN H 2.0

V Logic low-level input voltage V IN L 0.8V Vtdac0_4W

Step 0 (When initialized : channel 1 comparator level) 0.291

0.3 0.309

V

Vtdac1_4W Step 1 (Initial state+1) 0.2910.3 0.309V Vtdac2_4W Step 2 (Initial state+2) 0.2850.294 0.303V Vtdac3_4W Step 3 (Initial state+3) 0.2790.288 0.297V Vtdac4_4W Step 4 (Initial state+4) 0.2670.276 0.285V Vtdac5_4W Step 5 (Initial state+5) 0.2550.264 0.273V Vtdac6_4W Step 6 (Initial state+6) 0.2400.249 0.258V Vtdac7_4W Step 7 (Initial state+7) 0.2220.231 0.240V Vtdac8_4W Step 8 (Initial state+8) 0.2010.21 0.219V Vtdac9_4W

Step 9 (Initial state+9)

0.1800.189 0.198V Vtdac10_4W Step 10 (Initial state+10) 0.1570.165 0.173V Vtdac11_4W Step 11 (Initial state+11) 0.1340.141 0.148V Vtdac12_4W Step 12 (Initial state+12) 0.1070.114 0.121V Vtdac13_4W Step 13 (Initial state+13) 0.0800.087 0.094V Vtdac14_4W Step 14 (Initial state+14) 0.0530.06 0.067V 4W1-2-phase drive

Vtdac15_4W Step 15 (Initial state+15)

0.0230.03

0.037

V Vtdac0_W

Step 0 (When initialized : channel 1 comparator level) 0.2910.3 0.309V Vtdac4_W Step 4 (Initial state+1) 0.2670.276 0.285V Vtdac8_W Step 8 (Initial state+2)

0.2010.21 0.219V W1-2-phase drive

Vtdac12_W Step 12 (Initial state+3)

0.1070.114

0.121

V Vtdac0_H Step 0 (When initialized : channel 1 comparator level) 0.2910.3 0.309V 1-2 phase drive

Vtdac8_H

Step 8 (Initial state+1)

0.2010.21

0.219

V Current setting comparator threshold voltage (current step switching)

2 phase drive

Vtdac8_F

Step 8' (When initialized : channel 1 comparator level)

0.291

0.3 0.309

V

Continued on next page.

Ratings

Parameter Symbol

Conditions

min typ max Unit

Vtatt00 ATT1 = L, ATT2 = L 0.2910.3 0.309V Vtatt01 ATT1 = H, ATT2 = L 0.2320.24 0.248V Vtatt10 ATT1 = L, ATT2 = H 0.1430.15 0.157V Current setting comparator threshold voltage

(current attenuation rate switching)

Vtatt11

ATT1 = H, ATT2 = H 0.0530.06 0.067V Chopping frequency

Fchop Cchop = 200pF 4050 60kHz CHOP pin charge/discharge current Ichop

710

13

μA

Chopping oscillation circuit threshold voltage Vtup 0.8

1 1.2

V

VREF pin input current Iref VREF = 1.5V -0.5

μA MONI pin saturation voltage Vsatmon

Imoni = 1mA

400

mV

Charge pump VG output voltage VG

28

28.7

29.8

V

Rise time

tONG VG = 0.1μF 200 μS Oscillator frequency

Fosc

90

125

150

kHz

Output short-circuit protection EMO pin saturation voltage Vsatemo Iemo = 1mA 400mV CEM pin charge current

Icem

Vcem = 0V

710

13

μA

CEM pin threshold voltage Vtcem 0.8

1 1.2

V

Package Dimensions

LV8731V-TLM-H;中文规格书,Datasheet资料

unit : mm (typ) 3333

01.0

2.0

2.204.0

3.0

3.25

LV8731V-TLM-H;中文规格书,Datasheet资料

Ambient temperature, Ta –°C

A l l o w a b l e p o w

LV8731V-TLM-H;中文规格书,Datasheet资料

e r

LV8731V-TLM-H;中文规格书,Datasheet资料

d i s s i p a t i o n , P d m a x –W

Substrate Specifications (Substrate recommended for operation of LV8731V) Size : 90mm × 90mm × 1.6mm (two-layer substrate [2S0P]) Material : Glass epoxy

Copper wiring density : L1 = 85% / 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 90% 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.

Pin Assignment

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 2244

43

42

41

40

39

38

37

36

35

34

33

32

31

30

29

28

27

26

25

24

23

OUT1A

VG

OUT1A VM

PGND CP2

NC CP1

NC VREG5

VM1 ATT2

VM1 ATT1

RF1 EMO

RF1 CEM

OUT1B EMM

OUT1B CHOP

OUT2A MONI

OUT2A RST/BLK

RF2 STEP/DC22

RF2 FR/DC21

VM2 MD2/DC12

VM2 MD1/DC11

NC DM

NC OE

PGND ST

OUT2B VREF

OUT2B GND

Top view

LV8731V

LV8731V Block Diagram

LV8731V-TLM-H;中文规格书,Datasheet资料

LV8731V-TLM-H;中文规格书,Datasheet资料

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LV8731V-TLM-H;中文规格书,Datasheet资料

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LV8731V-TLM-H;中文规格书,Datasheet资料

Description of operation

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 Mode Internal regulator Charge pump

Low or Open Standby mode Standby Standby

Operating Operating

High Operating

mode

(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.

mode Application DM Drive

Low or Open STM mode Stepping motor channel 1 (CLK-IN)

High DCM mode DC motor channel 2 or stepping motor channel 1 (parallel)

STM mode (DM = Low or Open)

LV8731V-TLM-H;中文规格书,Datasheet资料

(2) Excitation mode setting function

mode

MD1 MD2 Excitation

Initial position

Channel 1 Channel 2 Low Low 2 phase excitation 100% -100%

High Low 1-2 phase excitation 100% 0%

Low High W1-2 phase excitation 100% 0%

High High 4W1-2 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.

(3) 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 "Examples of current waveforms in each of the excitation modes.")

分销商库存信息: ONSEMI

LV8731V-TLM-H