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NCV7728DPAR2G 数据表(PDF) 23 Page - ON Semiconductor

部件名 NCV7728DPAR2G
功能描述  Hex Half-Bridge Driver
PDF  27 Pages
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制造商  ONSEMI [ON Semiconductor]
网页  http://www.onsemi.com
标志 ONSEMI - ON Semiconductor

NCV7728DPAR2G 数据表(HTML) 23 Page - ON Semiconductor

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NCV7728
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23
SI
Status
Output
State
SO
Output
Current
t
LSx ON
ULDSC=0
LSx
ON
No
Fault
LSx ON
SRR=1
No
Fault
No
Fault
ULD
OUTx
ON
No Fault
ULD
ULD
LSx ON
ULDSC=1
ULD
LSx ON
SRR=1
LSx
ON
ULD
OUTx GND
IuldLS
TdUld
TdUld
OUTx
Z
OUTx GND
No Fault
No
Fault
TdUld
TdUld
OUTx VS
HSx ON
ULDSC=0
No
Fault
HSx ON
SRR=1
ULD
ULD
HSx ON
ULDSC=1
OUTx
Z
IuldHS
0A
ULD
No
Fault
TdUld
Figure 24. LS Under−load Timing Diagram
Thermal Warning and Thermal Shutdown
The NCV7728 provides individual thermal sensors for
each half−bridge. Moreover, the sensor reports over
temperature warning level and an over temperature
shutdown level. The TW status bit (output bit 0) will be set
if the temperature exceeds the over temperature warning
level, but the drivers will remain active. Once the IC
temperature fall below the thermal warning threshold the
TW flag is automatically clearly. If any of the individual
thermal sensors detects a thermal shutdown level then the
drivers on the offending half bridge are latched off. The TSD
(PRE_15) bit is set to capture a thermal shutdown event. A
valid SPI command with SRR and temperature below the
Tsd threshold are required to clear the latched fault. Since
thermal warning precedes an over temperature shutdown,
software polling of this bit will allow load control and
possible
prevention
of
over
temperature
shutdown
conditions.
Figure 25. Thermal Warning and Shutdown Timing Diagram
OUTx
ON
t
SI
Status
Output
State
SO
OUTx
ON
No
Fault
TSD
TWR
TJ
TW
No
Fault
TW
OUTx ON
No
Fault
No
Fault
OUTx
ON
TW
OUTx
ON
TW
OUTx Z
TwHy
TsdHy
OUTx ON
SRR =1
TSD
TW
TSD
TW
TW
OUTx ON
SRR =1
TW
OUTx
ON
TW



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