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L9918 Datasheet(PDF) 26 Page - STMicroelectronics

Part # L9918
Description  Alternator voltage regulator with LIN interface for 12 V applications
PDF  109 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L9918 Datasheet(HTML) 26 Page - STMicroelectronics

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Symbol
Parameter
Notes
Min.
Typ.
Max.
Unit
DFLRCBZ,19
Blind Zone in default mode
selectable by NVM bits
(TV_SPRUNG)
14.4
%
DFLRCBZ,20
15.2
%
DFLRCBZ,21
16
%
DFLRCBZ,22
16.8
%
DFLRCBZ,23
17.6
%
DFLRCBZ,24
18.4
%
DFLRCBZ,25
19.2
%
DFLRCBZ,26
20
%
DFLRCBZ,27
20.8
%
DFLRCBZ,28
21.6
%
DFLRCBZ,29
22.4
%
DFLRCBZ,30
23.2
%
DFLRCBZ,31
24
%
DFLRCBZ,32
24.8
%
TFDC_min,1
Minimum duty cycle
(SST_ULIM_TV0_EN)
0
%
TFDC_min,2
8
%
IFRO
Minimum excitation current
when EXC duty cycle is >
40 % for rotor open detection
0.5
A
IMAX_VE1
Excitation Current
Limitation in pre-excitation
state (IMAX_VE)
Imax_ve
_val
A
IMAX_VE2
Imax_ve
_val -0.2
A
IMAX_VE3
Imax_ve
_val
+0.2
A
IMAX_VE4
No Lim
A
EXC duty cycle communication
The duty cycle value applied on the power MOS that drivers the excitation coil of the alternator feeds a digital duty
cycle filter.
Table 10. EXC duty cycle communication
Symbol
Parameter
Notes
Min.
Typ.
Max.
Unit
DFfilter,1
EXC duty cycle filter
(DFM_FILTER_TP)
13
ms
DFfilter,2
26
DFfilter,3
40
DFfilter,4
53
DFfilter,5
66
DFfilter,6
80
DFfilter,7
93
DFfilter,8
106
L9918
EXC electrical characteristic
DS13000 - Rev 2
page 26/109



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