參數(shù)資料
型號(hào): LV8773
廠商: SANYO SEMICONDUCTOR CO LTD
元件分類: 運(yùn)動(dòng)控制電子
英文描述: STEPPER MOTOR CONTROLLER, DIP28
封裝: 0.500 INCH, DIP-28
文件頁數(shù): 4/14頁
文件大小: 183K
代理商: LV8773
LV8773
No.A1961-12/26
Application Circuit Example
Stepping motor driver circuit
The formulae for setting the constants in the examples of the application circuits above are as follows :
Constant current (100%) setting
When VREF = 1.5V
IOUT = VREF/5/RF resistance
= 1.5V/5/0.3
Ω = 1.0A
Chopping frequency setting
Fchop = Ichop/ (Cchop × Vtchop × 2)
= 10
μA/ (220pF × 0.5V × 2) = 45.4kHz
Timer latch time when the output is short-circuited
Tcem = Ccem × Vtcem/Icem
= 100pF × 1V/10
μA = 10μs
+-
100pF
200pF
24V
1.5V
+
-
M
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
VG
OUT1A
VM
PGND
CP1
VREG5
VM1
ATT
RF1
EMO1
CEM
OUT1B
EMM
CHOP
OUT2A
RF2
DC22
DC21
DC12
VM2
DC11
PGND
OUT2B
VREF
GND
L
V8773
EMO2
CP2
ST
Logic input
Position detection
monitor
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