lv8740v ON Semiconductor, lv8740v Datasheet - Page 22

• Manufacturer Part Number: lv8740v
• Description: Pwm Current Control Stepping Motor Driver
• Manufacturer: ON Semiconductor

• DC motor driver application circuit example
detection monitor
Connect status
Each constant setting type in the example of the above-mentioned circuit is as follows.
When setting current LIMIT = 100%, VREF = 1.5V, the following output current flows :
Chopping frequency setting.
Time of timer latch when output is short-circuited
62.5kHz (RCHOP=20kΩ)
Ilimit = VREF/5/RF resistance
Tcem = Ccem * Vtcem/Icem
100pF
= 100pF * 1V/10μA = 10μs
= 1.5V/5×100%/0.2Ω=1.5A
1.5V
-
Logic input
+
10
12
13
14
15
16
17
18
19
20
21
22
11
1
2
3
4
5
6
7
8
9
VG
VM
CP2
CP1
VREG5
ATT2
ATT1
EMO
CEM
EMM
RCHOP
MONI
RST
STP/DC22
FR/DC21
MD2/DC12
MD1/DC11
DM
OE
ST
VREF
GND
LV8740V
PGND1
PGND2
OUT1A
OUT1A
OUT1B
OUT1B
OUT2A
OUT2A
OUT2B
OUT2B
VM1
VM1
VM2
VM2
RF1
RF1
RF2
RF2
NC
NC
NC
NC
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
+ -
24V
No.A1864-22/23
M
M