The LV8740V is a 2-channel H-bridge driver IC that can switch a stepper motor driver, which is
capable of micro-step drive and supports Quarter-step excitation, and two channels of a brushed
DC motor driver, which supports forward, reverse, brake, and standby of a motor. It is ideally
suited for driving brushed DC motors and stepper motors used in office equipment and
amusement applications.
Function
•
Single-channel PWM current control stepper motor driver (selectable with DC motor driver channel 2) incorporated.
•
On resistance (upper side : 0.3Ω ; lower side : 0.2Ω ; total of upper and lower : 0.5Ω ; Ta = 25°C, IO = 2.5A)
•
Excitation mode can be set to Full-step, Half-step full torque, Half-step , or Quarter-step
•
Excitation step proceeds only by step signal input
•
Motor current selectable in four steps
•
BiCDMOS process IC
•
Output short-circuit protection circuit (selectable from latch-type or auto reset-type) incorporated
•
Unusual condition warning output pins
•
No control supply required
Specifications
Absolute Maximum Ratings
at Ta = 25°C
Parameter
Supply voltage 1
Output peak current
Output current
Logic input voltage
MONI/EMO input voltage
Allowable power dissipation
Operating temperature
Storage temperature
Symbol
VM max
IO peak
IO max
VIN
VMONI/VEMO
Pd max
Topr
Tstg
*
VM , VM1 , VM2
tw
≤
10ms, duty 20%, Each 1ch
Each 1ch
ST , OE , DM , MD1/DC11 , MD2/DC12 ,
FR/DC21 , STP/DC22 , RST , EMM , ATT1 , ATT2
-0.3 to +6.0
3.45
-30 to +85
-55 to +150
V
W
°C
°C
Conditions
Ratings
38
3.0
2.5
-0.3 to +6.0
Unit
V
A
A
V
* Specified circuit board : 90×90×1.6mm
3
: 2-Layer glass epoxy printed circuit board with back mounting.
Caution 1) Absolute maximum ratings represent the value which cannot be exceeded for any length of time.
Caution 2) Even when the device is used within the range of absolute maximum ratings, as a result of continuous usage under high temperature, high current,
high voltage, or drastic temperature change, the reliability of the IC may be degraded. Please contact us for the further details.
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.
ORDERING INFORMATION
See detailed ordering and shipping information on page 25 of this data sheet.
Semiconductor Components Industries, LLC, 2013
April, 2013
42413NK 20130225-S00006 No.A1864-1/25
LV8740V
Recommended Operating Conditions
at Ta = 25°C
Parameter
Supply voltage range
Logic input voltage
Symbol
VM
VIN
VM , VM1 , VM2
ST , OE , DM , MD1/DC11 , MD2/DC12 ,
FR/DC21 , STP/DC22 , RST , EMM , ATT1 ,
ATT2
VREF input voltage range
VREF
0 to 3.0
V
Conditions
Ratings
9 to 35
0 to 5.5
Unit
V
V
Electrical Characteristics
at Ta = 25°C, VM = 24V, VREF = 1.5V
Parameter
Standby mode current drain
Current drain
VREG5 output voltage
Thermal shutdown temperature
Thermal hysteresis width
Motor Driver
Output on-resistance
Ronu
Rond
Output leakage current
Diode forward voltage
ST pin input current
IOleak
VD
ISTL
ISTH
Logic pin input current
(other ST pin)
IINH
Logic input voltage
High
Low
Current setting
comparator
threshold voltage
(Current step
switch)
Half step
resolution
Vtdac2_H
Half step
resolution
(full torque)
Full step
resolution
Current setting comparator
threshold voltage
(Current attenuation rate switch)
Vtatt00
Vtatt01
Vtatt10
Vtatt11
Chopping frequency
VREF pin input current
MONI pin saturation voltage
Charge pump
VG output voltage
Rise time
Oscillator frequency
VG
tONG
Fosc
VG = 0.1μF , Between CP1-CP2 0.1uF
ST=”H”
→
VG=VM+4V
RCHOP = 20kΩ
90
125
150
kHz
28
28.7
29.8
0.5
V
ms
Fchop
Iref
Vsatmon
ATT1=L, ATT2=L
ATT1=H, ATT2=L
ATT1=L, ATT2=H
ATT1=H, ATT2=H
RCHOP = 20kΩ
VREF = 1.5V
IMONI=1mA
0.290
0.190
0.140
0.090
45
-0.5
50
100
0.300
0.200
0.150
0.100
62.5
0.310
0.210
0.160
0.110
75
V
V
V
V
kHz
μA
mV
Vtdac2_HF
Vtdac2_F
Vtdac0_HF
Quarter
step
resolution
Vtdac1_W
Vtdac2_W
Vtdac3_W
Vtdac0_H
VINh
VINl
Vtdac0_W
IINL
IO = 2.5A, Upper-side on resistance
IO = 2.5A, Lower-side on resistance
VM=35V
ID = -2.5A
VIN = 0.8V
VIN = 5V
OE , DM , MD1/DC11 , MD2/DC12 ,
FR/DC21 , STP/DC22 , RST , EMM , ATT1 ,
ATT2 , VIN = 0.8V
VIN = 5V
ST , OE , DM , MD1/DC11 , MD2/DC12 ,
FR/DC21 , STP/DC22 , RST , EMM , ATT1 ,
ATT2
Step 0(When initialized : channel 1
comparator level)
Step 1 (Initial state+1)
Step 2 (Initial state+2)
Step 3 (Initial state+3)
Step 0 (When initialized: channel 1
comparator level)
Step 2 (Initial state+1)
Step 0 (Initial state, channel 1 comparator
level)
Step 2 (Initial state+1)
Step 2
0.290
0.290
0.300
0.300
0.310
0.310
V
V
0.200
0.290
0.210
0.300
0.220
0.310
V
V
0.260
0.200
0.095
0.290
0.270
0.210
0.105
0.300
0.280
0.220
0.115
0.310
V
V
V
V
0.290
0.300
0.310
V
30
2.0
0
50
70
5.5
0.8
μA
V
V
3
48
3
1.1
8
80
8
0.3
0.2
0.4
0.25
50
1.3
15
112
15
Ω
Ω
μA
V
μA
μA
μA
Symbol
IMstn
IM
Vreg5
TSD
ΔTSD
Conditions
ST = ”L” , I(VM)+I(VM1)+I(VM2)
ST = ”H”, OE = ”L”, no load
I(VM)+I(VM1)+I(VM2)
IO=-1mA
Design guarantee
Design guarantee
4.7
150
5.0
180
40
5.3
210
V
°C
°C
Ratings
min
typ
180
3
max
250
5
Unit
μA
mA
Continued on next page.
No.A1864-2/25
LV8740V
Continued from preceding page.
Parameter
Output short-circuit protection
EMO pin saturation voltage
CEM pin charge current
CEM pin threshold voltage
Vsatemo
Icem
Vtcem
Iemo = 1mA
Vcem=0V
7
0.8
50
10
1.0
100
13
1.2
mV
μA
V
Symbol
Conditions
Ratings
min
typ
max
Unit
Pin Assignment
VG 1
VM 2
CP2 3
CP1 4
VREG5 5
ATT2 6
ATT1 7
EMO 8
CEM 9
EMM 10
RCHOP 11
MONI 12
RST 13
STP/DC22 14
FR/DC21 15
MD2/DC12 16
MD1/DC11 17
DM 18
OE 19
ST 20
VREF 21
GND 22
Top view
44 OUT1A
43 OUT1A
42 PGND1
41 NC
40 NC
39 VM1
38 VM1
37 RF1
36 RF1
35 OUT1B
34 OUT1B
LV8740V
33 OUT2A
32 OUT2A
31 RF2
30 RF2
29 VM2
28 VM2
27 NC
26 NC
25 PGND2
24 OUT2B
23 OUT2B
No.A1864-3/25
LV8740V
Package Dimensions
unit : mm (typ)
3285B
TOP VIEW
15.0
44
SIDE VIEW
BOTTOM VIEW
(7.8)
5.6
7.6
(3.6)
1
(0.68)
2
0.65
0.22
1.7 MAX
0.2
SIDE VIEW
0.05 (1.5)
0.5
SSOP44J(275mil)
Pd max - Ta
6.0
Four-layer circuit board 1*1
5.50
5.0
Allowable power dissipation, Pdmax - W
4.0
Four-layer circuit board 2*2
3.45
3.80
3.0
Two-layer circuit board 1*1
2.65
2.86
Two-layer circuit board 2*2
2.0
1.98
1.79
1.0
1.38
*1 With components mounted on the exposed die-pad board
*2 With no components mounted on the exposed die-pad board
0
10
30
50
70
90
Ambient temperature, Ta - C
No.A1864-4/25
LV8740V
Substrate Specifications
(Substrate recommended for operation of LV8740V)
Size
: 90mm × 90mm × 1.6mm
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,
射频识别(Radio Frequency Identification，RFID)技术是一种利用无线射频通信实现的非接触式自动识别技术，与目前广泛采用的条形码技术相比，RFID具有容量大、识别距离远、穿透能力强、抗污性强等特点。RFID技术已经发展得比较成熟并获得了大规模商用，但超高频RFID技术相对滞后。本文分析了射频芯片nRF9E5的功能特性，并将其用于RFID系统中，设计了一套有源超高频(...[详细]
聊聊、笑笑、闹闹
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
