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參數(shù)資料
| 型號： | LV8741V |
| 廠商： | SANYO SEMICONDUCTOR CO LTD |
| 元件分類： | 運動控制電子 |
| 英文描述： | STEPPER MOTOR CONTROLLER, 1.75 A, PDSO44 |
| 封裝： | 0.275 INCH, SSOP-44 |
| 文件頁數(shù)： | 10/25頁 |
| 文件大小： | 204K |
| 代理商： | LV8741V |
LV8741V
No.A0814-18/25
DCM Mode (DM-High)
(1) DCM mode output control logic
Parallel input
Output
DC11 (21)
DC12 (22)
OUT1 (2) A
OUT1 (2) B
Mode
Low
OFF
Standby
High
Low
High
Low
CW (Forward)
Low
High
Low
High
CCW (Reverse)
High
Low
Brake
(2) Reset function
RST
Operating mode
MONI
High or Low
Reset operation not performed
High output
The reset function does not operate in DCM mode. In addition, the MONI output is High, regardless of the RST pin
state.
(3) Output enable function
OE
Operating mode
Low
Output OFF
High
Output ON
When the OE pin is set Low, the output is forced OFF and goes to high impedance. When the OE pin is set High,
output conforms to the control logic.
(4) Current limit control time chart
(5) Current limit reference voltage setting function
ATT1
ATT2
Current setting reference voltage
Low
VREF/3
×100%
High
Low
VREF/3
×67%
Low
High
VREF/3
×50%
High
VREF/3
×33%
The voltage input to the VREF pin can be switched to four-step settings as the reference voltage for setting the current limit.
Set current calculation method
The reference voltage is set by the voltage applied to the VREF pin and the two inputs ATT1 and ATT2. The current
limit can be set from this reference voltage and the RF resistance value.
Ilimit = (VREF/3
× Current setting ratio) /RF resistance
(Example) When VREF = 1.5V, setting current ratio = 100% [(ATT1, ATT2) = (Low, Low)] and RNF1 (2) = 0.5
,
the current limit value is as follows :
Ilimit = 1.5V/3
× 100%/0.5 = 1A
CHARGE
fchop
Forced CHARGE
section
Coil current
Set current
Current mode
SLOW
Current mode
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
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