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L9408FDIETR Datasheet(PDF) 11 Page - STMicroelectronics

Part # L9408FDIETR
Description  Automotive multifunction smart alternator regulator
PDF  14 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L9408FDIETR Datasheet(HTML) 11 Page - STMicroelectronics

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L9408F
Electrical specifications
13
Figure 5. Start-up timing
The diagnostic result is disabled during the Soft-start delay time t_ST and the soft attack
timing t_SL.
Figure 6. Load response control
Table 6. Fault detection
Root cause
Signal
Effect
Test detect
Alternator belt breaking
PH
Alternator dis-excitation
VPH<VPHH & VA+<Vreg
Brushes open
PH
Alternator dis-excitation
VPH<VPHH & VA+<Vreg
Field interruption
PH
Alternator dis-excitation
VPH<VPHH & VA+<Vreg
Field short circuit to the battery
PH
Alternator dis-excitation
VPH<VPHH & VA+<Vreg
Field short circuit to the ground
DF
Overvoltage
DF<VS1 & VA+>Vreg



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