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L9779WD Datasheet(PDF) 91 Page - STMicroelectronics

Part # L9779WD
Description  Multifunction IC for engine management system
PDF  170 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L9779WD Datasheet(HTML) 91 Page - STMicroelectronics

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L9779WD
Functional description
169
Note:
When those four single Lside and four single Hside are configured as parallel configuration,
for example 2 single Lside stage to 1 Lside stage or 4 single Lside stage to 1 Lside stage,
the Rdson could be 1/2 or 1/4 as one single stage, the over current threshold could be
roughly double or 4 times as single stage, but the over current detected filter time will be
increased to 2 times as single stage from 4 µs typical to 8 µs typical by L9779WD itself,
because each single stage will switch on its own overcurrent threshold no matter the
configuration for off stage diagnostic, all thresholds will be kept as single stage whatever the
configuration of those 4 Lside/Hside.
4Low
4High
0
0
1
1
0
0
0
1
1
1
0
0
0
1
0
0
OUT22 and OUT24 and OUT27 and OUT28 Low side Parallel
OUT21 and OUT23 and OUT25 and OUT26 High side Parallel
OUT24
OUT23
OUT22
OUT21
2Low
2High
0 0 1 1 0 1 1 0 OUT27 and OUT28 Low side Parallel
OUT21 and OUT23 High side Parallel
OUT27
OUT23
OUT27
OUT21
2Low
2Low
2High
2High
0
0
1
0
1
1
1
0
0
1
1
1
0
1
0
0
OUT22 and OUT24 Low side Parallel
OUT27 and OUT28 Low side Parallel
OUT21 and OUT23 High side Parallel
OUT25 and OUT26 High side Parallel
OUT24
OUT27
OUT23
OUT25
OUT22
OUT27
OUT21
OUT26
4Low
2High
0 1 0 1 0 1 1 0 OUT22 and OUT24 and OUT27 and OUT28 Low side Parallel
OUT21 and OUT23 High side Parallel
OUT24
OUT23
OUT22
OUT21
4Low
2High
0 0 0 1 1 0 0 0 OUT22 and OUT24 and OUT27 and OUT28 Low side Parallel
OUT25 and OUT26 High side Parallel
OUT24
OUT25
OUT22
OUT25
2Low
4High
0 1 0 0 0 0 1 0 OUT22 and OUT24 Low side Parallel
OUT21 and OUT23 and OUT25 and OUT26 High side Parallel
OUT24
OUT23
OUT22
OUT25
2Low
4High
0 1 0 0 0 1 0 0 OUT27 and OUT28 Low side Parallel
OUT21 and OUT23 and OUT25 and OUT26 High side Parallel
OUT27
OUT23
OUT27
OUT25
Half
Bridge
2Low
2High
10 110 110
OUT22 and OUT24 Low side Parallel
OUT21 and OUT23 High side Parallel
OUT24
OUT23
OUT22
OUT21
Table 40. CPS table combined mode parallelism (continued)
Register
bit
7 6 5 4 3 2 1 0
Over current mask time increased to 8 µs
Enable
by
Diagn
on



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