L9911

Car alternator multifunction smart voltage regulator

Datasheet - production data

 Thermal protection
 Field short circuit protection
 Protected diagnostic lamp driver
 Protected high side relay driver
 Complex diagnostics
 Load response control
 DFM output (field monitor)
 Self start function
'!0'03

Multiwatt8

Description
The L9911 is a monolithic multifunction alternator
voltage regulator intended for use in automotive
application.
Features
It includes the control section, the field power
 Fully monolithic design stage, fault diagnostic circuit which drives a
 High side field driver warning lamp, and the protection against short
circuits

Table 1. Device summary

Order code Temp. range, °C Package Packing

L9911F
L9911I
L9911P
Tj = -40 to +150 Multiwatt8 Tube
L9911V
L9911K
L9911U

September 2015 DocID10990 Rev 13 1/20

This is information on a product in full production. www.st.com
Contents L9911

Contents

1 Circuit operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.1 Voltage regulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.2 Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.3 Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.4 Load response control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.5 Self start function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

3 Electrical specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.1 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.2 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.3 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.4 Principle of phase regulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

4 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.1 Multiwatt 8 (pin 5 GND) package information . . . . . . . . . . . . . . . . . . . . . . 17

5 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

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L9911 List of tables

List of tables

Table 1. Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Table 2. Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Table 3. Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Table 4. Thermal data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Table 5. Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Table 6. Load response control parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Table 7. Load response control timing options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Table 8. Correspondence of frequency (typical values) to application features . . . . . . . . . . . . . . . . 11
Table 9. Customization of L9911: combination of LRC, regulation, and application options . . . . . . 11
Table 10. Fault detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Table 11. Multiwatt 8 (pin 5GND) package mechanical drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Table 12. Document revision history. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

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3
List of figures L9911

List of figures

Figure 1. Pin connection (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Figure 2. Vreg-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Figure 3. Vreg-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Figure 4. Vreg-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Figure 5. Vreg-4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Figure 6. Output voltage rise/fall time (F+, DFM). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Figure 7. Phase regulation characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Figure 8. Application diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Figure 9. High side/low side driver saturation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Figure 10. Test mode to cancel soft-start/attack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Figure 11. Soft-start enable frequency range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Figure 12. Soft-start characteristics (always activated at engine start) . . . . . . . . . . . . . . . . . . . . . . . . 15
Figure 13. Soft start/attack characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Figure 14. DF monitor electrical configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Figure 15. Short circuit drivers' protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Figure 16. Multiwatt 8 (pin 5GND) package outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

4/20 DocID10990 Rev 13

L9911 Circuit operation

1 Circuit operation

The alternator's voltage regulator performs the following main functions:

1. voltage regulation
2. protection
3. control fault diagnosis
4. load response control

1.1 Voltage regulation

The alternator voltage is compared with a reference voltage in an amplifier, whose output
determines the switching frequency of output power MOS whose current excites the coil of
the alternator; as the regulator is in fixed-frequency topology, the field switching frequency
does not depend on the alternator characteristics. The regulators have an integrated filter in
the voltage sensing path guaranteeing the correct behaviour of the devices also when the
rectifier diodes feature very high switching spikes. The internal filtering allows the usage of
the device also with very long cables connecting the alternator to the battery with an
impedance so high to cause a superimposed ripple on the alternator voltage higher than 5-
6 V. Consequently it doesn't need, in the standard application, any external component.
Anyway an external capacitor (2.2 μF) must be inserted between A+ and ground when using
the device with very long cables.

1.2 Protection
It is present a protection against short circuits of the lamp and the relay power drivers (L)
and of the field power driver (F+), a thermal drivers shutdown protection and an overvoltage
protection of L power drivers.

1.3 Diagnosis
The circuit detects fault conditions related to the phase and F+ status and receives
informations from one of the three alternator phases. In order to prevent spurious
indications, fault warnings are not displayed immediately but are delayed by a fixed time.

1.4 Load response control

The internal circuit regulates the soft start characteristics (activated always at engine start)
and the soft attack characteristics.

1.5 Self start function

The device wakes up by the phase signal only. The phase signal must have a voltage
amplitude higher than VPHL1 and a frequency higher than EN-x.

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Pin description L9911

2 Pin description

Figure 1. Pin connection (top view)

 "
 &
 2%3
 '.$ CASE
 ,
 2%3
 $&-
 0

'!0'03

Table 2. Pin description

N° Pin Function

1 P Phase sense input.

2 DFM Field monitor output.
3 RES Reserved.
4 L Lamp terminal low side driver; relay terminal high side driver.
5 GND-case Ground.
6 RES Reserved.
7 F+ High side driver output.
+
8 B Sensed power supply.

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L9911 Electrical specification

3 Electrical specification

3.1 Absolute maximum ratings

Tj = -40 to 150 °C, unless otherwise specified.

Table 3. Absolute maximum ratings

Symbol Parameter Value Unit

VS DC supply voltage (2 min. @ 25 °C) 24 V

Transient supply voltage (load dump) [see Figure 8]
- 40 V
t < 500 ms
Transient supply voltage (low energy spikes)
- 60 V
(see Figure 8) ISO7637-1 pulse 1,2,3 /ISO7637-3
Tj Junction temperature range -40 to 150 °C
Tstg, Tcase Storage and case temperature range -40 to 150 °C
Ptot Total power dissipation (@ Tcase  150°C, Ifield  5A) 4 W
Reverse battery voltage (see Figure 8) @ 25°C,
- -2.5 V
T = 15 sec.
- Normal working condition reverse voltage (P vs. GND) -1.5 V
- DC pin current on F+, B+, GND (bonding limitation) 15 A
- ESD voltage MILSTD883C (All pins vs.GND) ±4 KV

3.2 Thermal data

Table 4. Thermal data
Symbol Parameter Value Unit

Rth j-case Thermal resistance junction-to-case ≤1.5 °C/W

3.3 Electrical characteristics

Tj = -40 °C to 150 °C; unless otherwise specified.

Table 5. Electrical characteristics

Symbol Parameter Test condition Min. Typ. Max. Unit

Vbat Operating supply voltage - 7 - 18 V

Ib-sinked Supply battery current - - - 25 mA
Ib-stby Standby current B+ = 12.5 V, F+ = 0 V - - 500 μA

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Electrical specification L9911

Table 5. Electrical characteristics (continued)

Symbol Parameter Test condition Min. Typ. Max. Unit

Ialt =1 A-0.9 · Inom; Tcase = 20 °C; 14.0 14.4 14.8 V

Vreg 1 1400 < rpm < RPMMAX -4.5 -3.5 -2.5 mV/°C
(see Figure 2)

Regulated voltage & thermal drift. Ialt =10 A; Tcase = 23 °C; 14.35 14.5 14.65 V
Vreg 2 3 configurations available, rpm = 6000 rpm; 15 V max. -11.8 -10 -8.2 mV/°C
selectable by mask option (see (see Figure 3)
Table 8). Ialt =10 A; Tcase = 23 °C; 14.35 14.5 14.65 V
Vreg 3
rpm = 6000 rpm (see Figure 4) -6 -4 -2 mV/°C
Ialt =10 A; Tcase = 23 °C; 13.95 14.2 14.3 V
Vreg 4
rpm = 6000 rpm (see Figure 5) -3.5 -2.5 -1.5 mV/°C
Vrpm - 1400<rpm<RPMMAX; Ialt = 10 A - - 200 mV
Vload - 5 A<Ialt < Inom; rpm = 6000 rpm - - 250 mV
Ialt = 3 A resistive; Tcase = 25 °C;
Vreg-less Reg. voltage without battery 12 - 16 V
2000 < rpm < RPMMAX
Voltage on pin
High and low
Vov-p Overvoltage protection threshold B+ to disable L 18 - 22 V
side driver off
drivers
VB+ to turn on L low side driver Vreg - Vreg +
Vov-d Overvoltage diagnosis threshold Vreg V
at VF+ > VS1 5% 5%
Temperature to disable F+,
Tj-sd Thermal shutdown threshold 160 175 190 °C
DFM, L (high & low side drivers)
L/F+/DFM from OFF STATE
Tj-sd- Tj-sd-
Tj-sd-dwn Thermal shut-down hysteresis (due to thermal shutdown) to ON - °C
10 2
STATE
Vuv-1 VB+ to turn on L low side driver 7.7 8.6 9.5 V
Under voltage diagnosis threshold Vuv + Vuv + Vuv +
Vuv-up VB+ to turn off L low side driver V
0.40 0.75 1.2
Tj = 150 °C; I = 4.5 A - - 0.6 V
VF+_sat Field driver saturation voltage
Tj = 25 °C; I = 7 A - - 0.55 V
Vf Freewheeling diode F+ I=5A - - 2 V
F+ = 0 V; Tj = -40 °C 11 - 18 A
Field short circuit driver protection
If_SCTH threshold current F+ = 0 V; Tj = -25 °C 9.5 - 18 A
(see Figure 15)
F+ = 0 V; Tj = -150 °C 9 - 18 A
Vs1 Field driver ON-state detection - 4.5 - 5.5 V
f-pre Pre-excitation frequency - 283 333 383 Hz
Duty-pre Pre-excitation Field driver ON-duty - 15.93 18.75 21.57 %
tr Output voltage rise time Ifield = 3 A resistive 10 - 50 μs
tf Output voltage fall time see Figure 6) 10 - 50 μs
Ialt = 1 A~0.9 · Inom;
Fsw_F+ Field switching frequency 250 - 400 Hz
1400 rpm < rpm < RPMMAX

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L9911 Electrical specification

Table 5. Electrical characteristics (continued)

Symbol Parameter Test condition Min. Typ. Max. Unit

If_leak Output field driver leakage current B+ = 24 V; VF+ = 0 - - 10 A

Phase regulation max field ON
DUTY-PR see Figure 7 26.56 31.25 35.94 %
duty
High side driver saturation
VH_SAT With driver Isource = 500 mA - - 1.5 V
Voltage (see Figure 9)
Low side driver saturation voltage
VL_SAT With driver Isink = 500 mA - - 1.5 V
(see Figure 9)
Self bias without supply lamp B+ open; L connected to 12 V
VLSB - - 4 V
driver voltage through a 50 Ohm resistor
High side driver short circuit
IHSC B+ = 12.5 V; L = GND 1.2 - 3 A
current protection
Low side driver short circuit
ILSC B+ = L = 12.5 V 1 - 2 A
current (see Figure 15)
Enable regulator supply voltage
VthL - 0.8 - 1.15 V
threshold
L terminal pull-down current when
Ipd_L VL = 0.6 V 0.4 - 3.5 mA
the generator is not rotating
L sink current when the generator
IL_sink P frequency 500 Hz; VB+ = 12 V - - 100 μA
is rotating
t-D Diagnostic alarm delay time - 0.2 - 0.5 s
Test mode to cancel soft start/
Vcan-DFM 30 - 50 V
attack (voltage) (see Figure 10)
tcan-DFM Test mode delay time 25 - - ms
Enable control voltage input high
VPHL1 - - - 0.40 V
threshold
Enable control voltage input low
VPHL2 - - - 0.25(1) V
threshold
Enable Control Voltage Phase
tPHL1 - 50 - 115 μs
Filtering Time
Diagnosis phase loss input high
VPHH1 - 8 9 10 V
threshold
Diagnosis phase loss input low
VPHH2_1 - 6.4 7.4 8.4 V
threshold
tPHd Diagnostic phase filtering time - 50 - 100 μs
IPd-P1 Phase pull-down current VP = 0.8 V 1 - 8 mA
Ialt =1 A~0.9 · Inom;
DFM output open drain switching
f-dfm 1400 rpm < rpm < RPMMAX; 125 - 200 Hz
freq.
Isink = 4 mA
VL-DFM Output low voltage saturation I-sink = 14 mA - - 1.5 V
I-SC_DFM Short circuit current protection VB+ = VDFM = 12.5 V 50 - 400 mA
Ilk-DFM Output leakage current VDFM =16 V at DFM driver OFF - - 5 μA

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19
Electrical specification L9911

Table 5. Electrical characteristics (continued)

Symbol Parameter Test condition Min. Typ. Max. Unit

t-TM Output voltage rise time 0.5 - 50

R = 1 k (see Figure 6) μs
t-TD Output voltage fall time 0.5 - 50
1. Guaranteed by design.

Table 6. Load response control parameters

Symbol Parameter Test Condition Min. Typ. Max. Unit

tST_1 Soft start delay time (see - 0- - s

Figure 12) 2 steps available,
Activated always at engine start
tST_2 selectable by mask option (see 1.73 2 2.35 s
Table 7).
tSL_1 Soft attack time / soft start time 2.13 2.5 2.87
(see Figure 12). 2 steps
From 0 to 100 % field duty cycle s
tSL_2 available, selectable by mask 7.65 9 10.35
option (see Table 7).
Reset frequency range to
EN-RES enable regulation; Frequency
- 40 50 60 Hz
(constant) judged after 4 periods (see
Figure 11)
Tj = 25 °C 108 120 132 Hz
EN-1
Tj = -40 to150 °C 102 120 138 Hz
Tj = 25 °C 131 145 159 Hz
EN-2
Tj = -40 to150 °C 124 145 166 Hz
Soft start enable (EN) and LRC Tj = 25 °C 144 160 176 Hz
EN-3
disable (DISAB) frequency Tj = -40 to150 °C 136 160 184 Hz
ranges.
Tj = 25 °C 174 193 212 Hz
EN-4 4 configurations available,
selectable by mask option Tj = -40 to150 °C 165 193 221 Hz
(possible combinations in Tj = 25 °C 270 300 330 Hz
DISAB-1 Table 8). Always activated at Tj = -40 to150 °C 255 300 345 Hz
engine start. Frequencies
judged after 4 periods (see Tj = 25 °C 315 350 385 Hz
DISAB-2
Figure 11) Tj = -40 to150 °C 298 350 402 Hz
Tj = 25 °C 367 408 449 Hz
DISAB-3
Tj = -40 to150 °C 347 408 469 Hz
Tj = 25 °C 420 466 512 Hz
DISAB-4
Tj = -40 to150 °C 397 466 535 Hz

Table 7. Load response control timing options

- t_SL = 2.5 s t_SL = 9 s

t_ST = 0 s LRC-A LRC-D

t_ST = 0.5 s LRC-C -
t_ST = 2 s LRC-E LRC-B

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L9911 Electrical specification

Table 8. Correspondence of frequency (typical values) to application features

Alternator revolution speed (rpm) 6 pole pairs 8 pole pairs

Typical configuration A Initiate regulation 1200 EN-1 EN-3

(Config-A) LRC Cut 3000 DISAB-1 DISAB-3

Typical configuration B Initiate Regulation 1450 EN-2 EN-4

(Config-B) LRC Cut 3000 DISAB-1 DISAB-3

Typical configuration Initiate Regulation 1450 EN-2 EN-4

C (Config-C) LRC Cut 3500 DISAB-2 EN-4

Considering the overall WW application scenario, there is a direct correspondence between

Typical configurations A/B and regulation curve Vreg-1, and between typical configuration C
and regulation curves Vreg-2 and Vreg-3. This is allowing the summary of all possible
customization for L9911 in the table below.

Table 9. Customization of L9911: combination of LRC, regulation, and application options

LRC Vreg-1/Config-A Vreg-1/Config-B Vreg-2/Config-B Vreg-2/Config-A Vreg-4/Config-A
timing 6 Pole 8 Pole 6 Pole 8 Pole 6 Pole 8 Pole 6 Pole 8 Pole 6 Pole 8 Pole
options Pairs Pairs Pairs Pairs Pairs Pairs Pairs Pairs Pairs Pairs

LRC-A L9911P nya nya nya nya nya nya nya L9911K nya

LRC-B nya nya L9911F nya L9911I nya nya nya nya nya
LRC-C nya nya nya nya nya nya L9911V nya nya nya

LRC-D nya nya nya nya nya nya nya nya nya nya

LRC-E L9911U nya nya nya nya nya nya nya nya nya

Figure 2. Vreg-1




 0D[



 7\S
6







0LQ




                   
4

6^6  #
6^6  #
6^6  # '!0'03

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19
Electrical specification L9911

Figure 3. Vreg-2







 -AX



 4YP
6







-IN













































4
6^6  #
6^6  #
6^6  # '!0'03

Figure 4. Vreg-3









-AX





4Y P
6














-IN




                   
4

6 ^6  #

6^6  #
6^6  #
'!0'03

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L9911 Electrical specification

Figure 5. Vreg-4





-AX



4YP

6



-IN









                   
4
6^6  #
6^6  #
6^6  # '!0'03

Figure 6. Output voltage rise/fall time (F+, DFM)


&
$&-

6O LT AGE



T RI SE T FALL
T 4- T 4$
'!0'03

Figure 7. Phase regulation characteristics

ON
%NGINE OFF

ON
)GN3W ITCH OFF
,OAD/.
ON
7,AMP OFF
T?34 T?3,

)FIELD

&$&- &IELD0RE &IELD

EXCITATION 2EGULATION '!0'03

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19
Electrical specification L9911

3.4 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

WARNINGLAMP
,
?
"

#
,
& 6B6CC

3TATOR &IELD
$&-
0
'.$
TO%#5

'!0'03

Figure 9. High side/low side driver saturation

"

2EGULATOR!SSY
,

#ONTROL
,
#IRCUIT

'!0'03

Figure 10. Test mode to cancel soft-start/attack

$&-

&),4%2TCA N #!.#%,
#/-0
!.$,!4#(
6CAN
'!0'03

Figure 11. Soft-start enable frequency range

%. ^
3/&4 34!2 4
[
%.!",% #/.34!.4
&2%15%.#9 (Z

%. 2%3 '!0'03

14/20 DocID10990 Rev 13

L9911 Electrical specification

Figure 12. Soft-start characteristics (always activated at engine start)

)GNSW
ON
OFF

SMIN SMIN 4IMESEC

%NGINESPEEDRPM
SOFTATTACKINHIBITION!LTSPEED

SOFTSTARTENABLE!LTSPEED

4IMESEC

&IELDCURRENT! 3OFTSTART 3OFTSTART 3OFTSTART

TIMING TIMING TIMING

3OFTSTART 3OFTSTART 3OFTSTART

DELAYTIME DELAYTIME DELAYTIME

S^S 4IMESEC

7,AMP

S^S

ON

OFF
4IMESEC
%'STOP %'STOP 3TARTERON
3TARTERON AND)GNSWOFF 3TARTERON

)GNSWON )GNSWON

%NGINE ST ART %NGINESTART %NGINERESTART

3OFT ATTACKINHIBI TION 3OFTATTACK IN HIBITION
!LTSPEED%'SP EED !LTSPEED%'SPEED
'!0'03

Figure 13. Soft start/attack characteristics

ON

%NGINE OFF

ON
)GN3WITCH OFF
,OAD/.
ON
OFF
7,AMP
T?34 T?3,

)FIELD

&$&- &IELD0RE &IELD

EXCITATION 2EGULATION

'!0'03

DocID10990 Rev 13 15/20

19
Electrical specification L9911

Table 10. Fault detection

Root cause Signal Effect Test detect

Alternator belt breaking P Alternator disexcitation VP<VPHH1 & VB+<Vreg

Brushes open P Alternator disexcitation VP<VPHH1 & VB+<Vreg
Field driver open P Alternator disexcitation VP<VPHH1 & VB+<Vreg
Field interruption P Alternator disexcitation VP<VPHH1 & VB+<Vreg
Field short circuit to the battery F+ Overvoltage VF+>VS1 & VB+ > Vov-d
Field short circuit to the ground P Alternator disexcitation VP<VPHH1 & VB+<Vreg
Battery discharge B+ Undervoltage VB+<Vuv

Note: The diagnostic result is disabled during the Soft-start delay time t_ST 0...3 and the soft-start
/ soft attack timing t_SL 0...3

Figure 14. DF monitor electrical configuration

,
2EGULATORASSY
6ALIM

"
#ONTROL
2
#IRCUIT
!LTERNATOR
&IELD & $&-

TOTHE%#5
&IELDDRIVER $&-ONDRIVER
4ES TCIRCUIT
'!0'03

Figure 15. Short circuit drivers' protection

#URRENTSHORTCIRCUIT&IELDDRIVER2ELAYDRIVER$&-ONDRIVER

4MS

#URRENTSHORTCIRCUIT,AMPDRIVER

&ILTERINGTIME 2ETRYTIME
'!0'03

Field driver, DFMon driver and Relay driver are protected in switching mode (not linear),
with a retry time less than 25 ms.
Lamp driver is protected in linear mode, with a retry time of 1 s.

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L9911 Package information

4 Package information

In order to meet environmental requirements, ST offers these devices in different grades of

ECOPACK® packages, depending on their level of environmental compliance. ECOPACK®
specifications, grade definitions and product status are available at: www.st.com.
ECOPACK® is an ST trademark.

4.1 Multiwatt 8 (pin 5 GND) package information

Figure 16. Multiwatt 8 (pin 5GND) package outline

+

$
6
/

6
GLDP &

/
/

/
/

) %

(
=
8 *

*

+
B-B%9 *$3*36

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Package information L9911

Table 11. Multiwatt 8 (pin 5GND) package mechanical drawing

Dimensions

Ref Millimeters Inches(1)

Min. Typ. Max. Min. Typ. Max.

A - - 5 - - 0.1969
B - - 2.65 - - 0.1043
C - - 1.6 - - 0.0630
E 0.49 - 0.55 0.0193 - 0.0217
F 0.78 - 0.85 0.0307 - 0.0335
G 2.40 2.54 2.68 0.0945 0.1000 0.1055
G1 17.64 17.78 17.92 0.6945 0.7000 0.7055
H1 19.6 - - 0.7717 - -
H2 - - 20.2 - - 0.7953
L 20.35 20.65 0.8012 0.8130
L2 17.05 17.20 17.35 0.6713 0.6772 0.6831
L3 17.25 17.5 17.75 0.6791 0.6890 0.6988
L4 10.3 10.7 10.9 0.4055 0.4213 0.4291
L7 2.65 - 2.9 0.1043 - 0.1142
S 1.9 - 2.6 0.0748 - 0.1024
S1 1.9 - 2.6 0.0748 - 0.1024
U 0.40 - 0.55 0.0157 - 0.0217
Z 0.70 - 0.85 0.0276 - 0.0335
diam1 3.65 - 3.85 0.1437 - 0.1516
1. Values in inches are converted from mm and rounded to 4 decimal digits.

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L9911 Revision history

5 Revision history

Table 12. Document revision history

Date Revision Changes

22-Jun-2004 1 Initial release.

Modified Figure 2, Table 2 and Table 5;
18-May-2005 2 Updated Figure 10, 11 and 14; Add Table 7.
Add ordering numbers.
Updated Table 5.
07-Nov-2005 3
Added new tables 6-9.
Added the L9911C part number.
28-Nov-2005 4
Updated the Table 9.
Document reformatted.
11-Jul-2007 5
Updated order codes, see Table 1: Device summary.
Updated Table 1: Device summary, Table 7: Load response control
09-Nov-2009 6 timing options and Table 9: Customization of L9911: combination of
LRC, regulation, and application options.
Updated Table 1: Device summary, Table 5: Electrical characteristics
and Table 9: Customization of L9911: combination of LRC,
23-Jul-2010 7 regulation, and application options.
Updated Figure 2, 3 and 4.
Added new Figure 5.
Updated Table 5: Electrical characteristics.
25-Jan-2011 8
Updated Figure 5.
Modified in the Table 5: Electrical characteristics the values of the
29-Mar-2011 9
“Vuv-up” parameter.
Updated:
Table 1: Device summary on page 1;
26-Mar-2012 10 Table 7: Load response control timing options on page 10;
Table 9: Customization of L9911: combination of LRC, regulation,
and application options on page 11.
Updaded Table 9: Customization of L9911: combination of LRC,
28-May-2012 11
regulation, and application options on page 11.
19-Sep-2013 12 Updated disclaimer.
30-Sep-2015 13 Added Section 1.5: Self start function on page 5.

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 L9911

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