L9407F(2008) Ver la hoja de datos (PDF) - STMicroelectronics
Número de pieza
componentes Descripción
Fabricante
L9407F Datasheet PDF : 14 Pages
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Electrical specification
L9407F
Figure 6. Soft start/attack characteristics
on
Engine off
on
Ign. Key off
on
W/Lamp off
Load ON
t_ST
t_SL
Ifield
Bl
Bl
DF - DFM
Field Pre-excitation Field Regulation
ct(s) Table 6. Fault detection
du Root cause
Pro Alternator belt breaking
lete Brushes open
so Driver open
- Ob Field interruption
t(s) Field short circuit to the battery
uc Field short circuit to the ground
rod Battery discharge (Field driver
open)
P No fully excited
leteBattery discharge
Signal
Effect
PH
Alternator
disexcitation
PH
Alternator
disexcitation
PH
Alternator
disexcitation
PH
Alternator
disexcitation
PH
Alternator
disexcitation
DF Overvoltage
A+ Undervoltage
A+ Undervoltage
A+ Undervoltage
Test detect
VPH<VPHH & VA+<Vreg
VPH<VPHH & VA+<Vreg
VPH<VPHH & VA+<Vreg
VPH<VPHH & VA+<Vreg
VPH<VPHH & VA+<Vreg
DF<VS1 & VA+>Vreg
VA+<Vreg
VA+<Vuv
VA+<Vuv
so The diagnostic result is disabled during the Soft-start delay time t_ST and the soft-start / soft attack timing t_SL
Ob Figure 7. Output voltage rise/fall time (DF, DF_MON)
90%
DF
DF_MON
Voltage
10%
t-RISE
t-TM
t-FALL
t-TD
10/14
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