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L9945TR bảng dữ liệu(PDF) 34 Page - STMicroelectronics

tên linh kiện L9945TR
Giải thích chi tiết về linh kiện  Automotive fully configurable 8-channel High/Low side MOSFET pre-driver suitable for 12 V and 24 V systems
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L9945TR bảng dữ liệu(HTML) 34 Page - STMicroelectronics

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Figure 18. Current limitation iterations (until OC failure)
tBLANK_HB
toff
ILIM_th
(CH3/7)
OC_th
(CH4/8)
tBLANK_HB
t
tOC
NON1/5
(NPWM)
OC Failure
toff
HBx_ILIM
Internal
NPWM
tBLANK_HB
0A
0s
toc
Ch4/8
toc
Ch3/7
CH3/7
CH4/8
tOC
freewheeling
OC Failure
Running Timers
toc
toff
tBLANK_HB
Current through
Load and Rshunt
Current through
Load only
Current through
Rshunt only
GAPG0102161522CFT
When current limitation threshold is reached for the first time, a dedicated HBx_ILIM latch is set, indicating that
current limitation function has been activated. This latch is cleared on SPI readout.
The OFF time interval for current limitation (tOFF) is selectable via SPI according to HBx_toff bit:
Table 22. tOFF selection
HBx_toff [1-0]
Min tOFF value
Typical tOFF value
Max tOFF value
Unit
00
28
31
34
µs
01
42
48
52
µs
10
56
62.5
70
µs
L9945
Functional description
DS12275 - Rev 10
page 34/144



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