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L99LDLH32 bảng dữ liệu(PDF) 37 Page - STMicroelectronics

tên linh kiện L99LDLH32
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L99LDLH32 bảng dữ liệu(HTML) 37 Page - STMicroelectronics

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L99LDLH32
Functional description
141
Figure 11. Short to ground fault management
5.3.9
Channel output – Open load detection
The L99LDLH32 features the open load (no current regulation) detection, implemented both
in Bus mode and Fail Safe / Stand Alone mode as well.
The open load detection is masked when the O/LED supply voltage is below a power good
threshold (VPG_TH_VPRE_REG), which is configurable in the range of [VPG_TH_VPRE_REG_min
÷ VPG_TH_VPRE_REG_max] with a step equal to VPG_TH_VPRE_REG_step.
There is one status bit (PG_NOT_VPRE_REG - see RAM memory map, Chapter 7) for the
VPRE_REG group to indicate the selected voltage threshold to enable open load diagnostic is
reached. If this bit is equal to “0”, the desired voltage threshold is not reached and the open
load diagnostic is disabled; otherwise, the threshold is reached and the diagnostic enabled.



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