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L9945 датащи(PDF) 139 Page - STMicroelectronics

номер детали L9945
подробное описание детали  Automotive fully configurable 8-channel High/Low side MOSFET pre-driver suitable for 12 V and 24 V systems
PDF  151 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
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If both OFF and ON pulses are requested in the same SPI frame, the behavior depends on the output state:
If the output is currently being kept OFF, an ON pulse will be generated
If the output is currently being kept ON, an OFF pulse will be generated
Diagnostic pulses requests are ignored in case of H-Bridge configuration.
The table below lists the diagnostic pulses related timings.
Table 49. Diagnostic pulses timings
Symbol
Parameter
Min.
Max.
Unit
tPULSE_ON
ON pulse duration
80
120
µs
tPULSE_OFF
OFF pulse duration
100
150
µs
6.6
Summary of disable sources and faults
The table below gathers all the disable sources and the fault events and summarizes their effects on the outputs.
Table 50. Summary of disable sources and faults
Event
CH1 – CH5
CH6
CH7 – CH8
DIS assertion (Section 6.1.1 )
Actively OFFA
Actively OFFA
No Effect
NDIS assertion (Section 6.1.1 )
Actively OFFA
Actively OFFA
No Effect
VDD5 overvoltage (Section 6.1.2 )
Actively OFFM
Actively OFFM
No Effect
VDD5 undervoltage (Section 6.1.2 )
Actively OFFA
Actively OFFA
No Effect
BIST on going (Section 6.1.3 )
Three-State
Three-State
Three-State
BIST failed (Section 6.1.3 )
Actively OFFM
Actively OFFM
Three-StateM
HWSC on going (Section 6.1.3 )
Actively OFF
Actively OFF
Three-State
HWSC failed (Section 6.1.3 )
Actively OFFM
Actively OFFM
Three-StateM
VPS undervoltage (Section 6.1.4 )
Actively OFFA
Actively OFFA
Actively OFFA
Charge Pump undervoltage (Section 6.1.5 )
Actively OFFA
Actively OFFA
Actively OFFA
Disable via SPI (en_OUT_xx) (Section 6.1.6 )
Three-StateM
Three-StateM
Three-StateM
Disable via SPI (prot_disable_xx) (Section 6.1.7 )
Actively OFFM
Actively OFFM
Actively OFFM
EN6 set low (Section 6.1.8 )
No Effect
Actively OFFA
No Effect
NRES assertion (Section 6.1.9 )
Actively OFFM
Actively OFFM
Actively OFFM
CC failed (Section 6.1.10 )
Actively OFFM
Actively OFFM
No Effect
OC failure (Section 6.3.1 )
Actively OFFM
Actively OFFM
Actively OFFM
STG failure (Section 6.4 )
No Effect
No Effect
No Effect
STB failure (Section 6.4 )
No Effect
No Effect
No Effect
OL failure (Section 6.4 )
No Effect
No Effect
No Effect
ON pulse request (Section 6.5 )
Actively ONA
Actively ONA
Actively ONA
OFF pulse request (Section 6.5 )
Actively OFFA
Actively OFFA
Actively OFFA
Syntax: A = Automatic Re-Engagement, M = Manual Re-Engagement
Note:
When configured as H-Bridge, CH7 and CH8 are treated like CH1-CH5.
L9945
Summary of disable sources and faults
DS12275 - Rev 8
page 139/151



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