L9911A View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
'L9911A' PDF : 15 Pages View PDF
L9911
Figure 7. Phase Regulation Characteristics
on
Engine off
on
Ign. Switch off
on
W/Lamp off
t_ST
t_SL
Ifield
F+/DFM
Field Pre-
excitation
Field
Regulation
Load ON
PRINCIPLE OF PHASE REGULATION:
When VB+ is above the regulated voltage, the field driver is controlled to keep phase peak voltage from
falling below VPHH1.
If phase peak voltage drops below VPHL1, phase regulation does not work.
Figure 8. Application Diagram
ignition
switch
warning lamp
_
+
Stator
B+ L
C
Field
L9911
F+
P
DFM
GND
+Vb / Vcc
to E.C.U.
8/15
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