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參數(shù)資料
| 型號： | TB62205FG |
| 元件分類： | 運(yùn)動控制電子 |
| 英文描述： | STEPPER MOTOR CONTROLLER, 0.96 A, PDSO38 |
| 封裝： | 0.450 INCH, 0.65 MM PITCH, LEAD FREE, PLASTIC, HSOP-36/38 |
| 文件頁數(shù)： | 21/36頁 |
| 文件大小： | 528K |
| 代理商： | TB62205FG |
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TB62205FG
2006-01-20
28
Operating Time of Overcurrent Protection Circuit
ISD non-detection time and ISD operating time
The overcurrent protection circuit has a non-detection time to prevent erroneous detection of spike current
generated in diode recovery current (IRR) or at switching. The non-detection time being synchronized with
the CR cycle for setting chopping frequency is expressed as follows.
Non-detection time = 4 × CR cycle
Time required to stop the output after overcurrent flows into the output stage is expressed as follows.
Minimum time = 5 × CR cycle
Maximum time = 8 × CR cycle
Note that the operating times as shown above are achieved when overcurrent flows as it is expected.
Depends on the timing of output control mode, the circuit may not be triggered.
Thus, to ensure safe operation, please insert a fuse in the VM power supply.
(The capacity of the fuse is determined according to a condition to be used. Please select one whose capacity
does not exceed the power dissipation for the IC to avoid any operating problems.)
min
Output stops (RESET mode)
CR oscillating
(chopping reference waveform)
max
min
ISD operating time
(Non-detection time)
ISD BLANK time
When overcurrent starts to flow into the output stage
(overcurrent state occurs)
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