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參數(shù)資料
| 型號(hào)： | UPD16857 |
| 廠商： | NEC Corp. |
| 英文描述： | MONOLITHIC 6 channel H-BRIDGE DRIVER |
| 中文描述： | 整體式6通道H橋驅(qū)動(dòng)器 |
| 文件頁數(shù)： | 10/16頁 |
| 文件大?。?/td> | 78K |
| 代理商： | UPD16857 |
μ
PD16857
10
Data Sheet S13908EJ1V0DS00
ABOUT SWITCHING OPERATION
When output A is switched as shown in the figure on the right, a dead
time (time during which both Pch and Nch are off) elapses to prevent
through current. Therefore, the waveform of output A (rise time, fall time,
and delay time) changes depending on whether output B is fixed to the
high or low level.
The output voltage waveforms of A in response to an input waveform
where output B is fixed to the low level (1) or high level (2) are shown
below.
(1) Output B: Fixed to low level
Output A: Switching operation (Operations of Pch switch and Nch switch are shown.)
Output A goes into high-impedance state and is in an undefined status during the dead time period. But,
because output B is pulled down by the load, a low level is output to A.
(2) Output B: Fixed to high level
Output A: Switching operation (Operations of Pch switch and Nch switch are shown.)
Output A goes into high-impedance state and is in an undefined status during the dead time period. But,
because output B is pulled up by the load, a high level is output to A.
V
M
A
B
Pch
Nch
Pch
Nch
Dead time
Input waveform
Voltage waveform at point A
Pch
Nch
:
:
OFF
ON
OFF
OFF
ON
OFF
→
→
→
→
ON
OFF
Current ON
Current OFF
OFF
OFF
OFF
ON
→
→
→
→
→
→
Dead time
Input waveform
Voltage waveform at point A
Pch
Nch
:
:
OFF
ON
OFF
OFF
ON
OFF
→
→
→
→
ON
OFF
Current OFF
Current ON
OFF
OFF
OFF
ON
→
→
→
→
→
→
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