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L9908 数据表(PDF) 91 Page - STMicroelectronics

部件名 L9908
功能描述  Automotive 3-Phase motor gate driver unit
PDF  153 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

L9908 数据表(HTML) 91 Page - STMicroelectronics

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Table 84. OFD enable bits
OFDn_EN1
OFDn_EN0
Description
0
0
Off State Diagnosis disabled (Default)
0
1
Pull-up current enabled, Pull-down current disabled
1
0
Pull-down current enabled, Pull-up current disabled
1
1
Off State Diagnosis disabled
The OFD is automatically enabled when OFD_EN bit is set and INLn/INHn = 0 [n = 1,2,3]. Once enabled, the
OFD circuit is stopped as soon as a 0 → 1 transition of INHn/INLn is detected.
Depending on the external load condition, the OFD configuration and detection shall follow the next table:
Table 85. OFD fault detection table
Condition
OFD_EN[1:0]
Error Flag
Description
3-Phase OFD
[Three phase load]
OFD1 = 10
OFD2 = 01
OFD3 = 10
HS2_OFD = X(1)
LS1_OFD = 0
LS2_OFD = 0
LS3_OFD = 0
Short to ground on one or multiple motor phase
HS2_OFD = 0
LS1_OFD = 1
LS2_OFD = 1
LS3_OFD = 1
Short to battery on one or multiple motor phase
HS2_OFD = X(1)
LS1_OFD = 0
LS2_OFD = 1
LS3_OFD = 1
Open connection on motor phase 1 (SHS_1)
HS2_OFD = X(1)
LS1_OFD = 0
LS2_OFD = 1
LS3_OFD = 0
Open connection on motor phase 2 (SHS_2)
HS2_OFD = X(1)
LS1_OFD = 1
LS2_OFD = 1
LS3_OFD = 0
Open connection on motor phase 3 (SHS_3)
HS2_OFD = 1
LS1_OFD = 1
LS2_OFD = 1
LS3_OFD = 1
No Fault
1. X = don't care.
L9908
Off State Diagnosis (OFD)
DS13546 - Rev 3
page 91/153



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