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參數(shù)資料
| 型號： | LB8653T |
| 元件分類： | 運動控制電子 |
| 英文描述： | STEPPER MOTOR CONTROLLER, 0.8 A, PDSO24 |
| 封裝： | 0.225 INCH, TSSOP-24 |
| 文件頁數(shù)： | 5/14頁 |
| 文件大?。?/td> | 305K |
| 代理商： | LB8653T |
LB8653T, LB8653FN
No.7982-13/14
(7) Shutter drive “Regeneration” mode
The “Regeneration” (MD1/MD2/MD3/IN1/IN2 = L/L/L/H/H) in shutter mode is used to slow the coil current
decay. This mode makes coil current regenerative (Slow-Decay) within the output H-bridge by switching from
“Close” (MD1/MD2/MD3/IN1/IN2 = L/L/L/L/H). (Refer to the following figure.)
(1) “Close” (MD1/2/3/IN1/2 = L/L/L/L/H)
(2) “Regeneration” (MD1/2/3/IN1/2 = L/L/L/H/H)
When shutter control is switched from “Stand-by” to “Close” (“Open”), the current rises to the target constant-
current value from the state of output current 0 (zero). However, the output of the constant-current control
amplifier inside the IC is in the full drive state during the above-mentioned “Regeneration” state. Therefore, when
it is switched from “Regeneration” to “Close” (“Open”), the current falls to the target constant-current value from
the state of full drive output.
For that reason, to switch the shutter drive to “Close” (“Open”) from “Regeneration” by constant-current control,
it must be switched to “Stand-by” once before switching to “Close” (“Open”).
The example of drive sequence is shown in the figure below.
(8) GND wiring and each power supply line capacitor
Connect PGND and SGND near the IC and set a capacitor to the part nearest the power supply pin for each power
supply.
OUT8
OUT7
OUT8
OUT7
ILB01670
IN2
IN1
Stand-by
Close
Open
Regeneration
Stand-by
ILB01671
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