L9466
Car alternator voltage regulator
Features
■
■
■
■
■
■
For air and liquid cooled applications
DF output (inverted field monitor)
Thermal protection
FIeld driver, lamp driver, relay driver, and DF
(field monitor) short circuit protected
Load response control
Single phase autostart
Description
The L9466 is a monolithic multifunction generator
Voltage regulator intended for use in automotive charging applications.
Table 1.
Device summary
Order code
L9466N
Multiwatt8
This All Silicon Voltage Regulator regulates the output of an automotive generator by controlling the field winding current by means of a variable frequency PWM high side driver.
Package
Multiwatt8
Packing
Tube
September 2013 Rev 3 1/11 www.st.com
11
4
5
1
2
3
Contents
Contents
L9466
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3.1
Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3.2
Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3.3
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2/11
L9466 Block diagram
Figure 1.
Block diagram
R
Relay
L
Fault
Lamp
ASVR
VGO
P
F+
DF
To
ECM
C
Field
(Rotor)
Key SW.
Stator
Rectifier
Bridge
Starter
Battery
Loads
3/11
Pin description
Table 2.
N°
6
7
4
5
8
1
2
3
Pin description
Pin Description
V
GO
F+
G
Generator Output – Voltage Sense and Power Supply to ASVR
Field Driver - High Side Drive Output
Ground for ASVR (Must be connected for Ground for ASVR)
NC Not connected
Gnd Internally connected to the Tab or Slug in MW-8.
DF Inverted Field Monitor Output
L Lamp - Low Side Driver; Relay - High Side Driver
P Phase Sense Input
Figure 2.
Pin connection (top view)
Tab connected to pin 5
6
5
4
3
2
1
8
7
D02AT502B
P
L
DF
GND
NC
G
F+
V
GO
L9466
4/11
L9466 Electrical specifications
3.1 Absolute maximum ratings
Table 3.
Symbol
I
OC
P tot
Absolute maximum ratings
Parameter
Output current capability
Power dissipation
Short circuit protected
Value
Internally limited
6
All terminal, to VGO and ground
Unit
W
Table 4.
Symbol
T j
T stg
T sd
R th j-case
Thermal data
Parameter
Junction temperature
Storage temperature
Thermal shut-down
Thermal resistance junction to case
Value
-40 to +150
-50 to +150
175
15
1.5
Unit
C
C
C
°C/W
Table 5.
Symbol
V
OS
V
OS
I
SB
Electrical characteristics
(T case
= -35°C to +150°C continuous unless otherwise specified)
Parameter Test condition Min. Typ.
Max.
Operating supply voltage
Operating supply voltage
Stand-by current
T case
= +25
C to =150
C
T case
= -40
C to +25
C
V
GO
= 12.6V; T case
= 25
C;
10k
; F+, G & Tab (Slug)
Grounded; L, DF, & P unconnected; Regulator not activated.
8
10
Vov
Vov
300
V
SP
V
NB
Regulator set-point
Generator output, no battery
Unit
V
V
A
V
SP
Curve shown in Figure 3
- 2
V
SP
+
2
V
T
C
V
LR
V
SR
V
F-ON
Thermal compensation
Load regulation
Speed regulation
Output saturation voltage
No battery, I
OUT
= 2A to 50%
Max. Load
Voltage @ V
GO
6500 grpm, 10% to 95% load
15A load, 2000 to 20,000 grpm
I
F
= 6A, V
GO
= 14.0V,
T case
= 25
C
300
100
750 mV mV mV
5/11
Electrical specifications L9466
Table 5.
Electrical characteristics (continued)
(T case
= -35°C to +150°C continuous unless otherwise specified)
Parameter Test condition Min. Typ.
Max.
Symbol Unit
I
V
I
I
F-ON
F-LIM
F-LIM
G-MIN
V
D-F
I
D-R
F
OSC
V
DF
I
DF-LK
F
TURBO
F
TURBO
Output saturation voltage
Field limit current
Field limit current
(1)
(1)
Min. generator current load
Field discharge diode
Diode reverse current
Oscillation frequency
DF saturation voltage
DF output leakage current
Internal clock frequency
IRD, SS, LRC Rate
I
I
I
F
= 5A, V
GO
= 13.5V,
T case
= 125
C
Current F+ Terminal to Gnd.
@ T case
25
C
Current F+ Terminal to Gnd.
@ T case
= +150
C
Current measured @ generator output
F
V
= 6A, T
R
During LRC operation
DF
= 20V
V
DF
< 25V
V
DF
= 32 - 35V; at 2.2k
V
DF
case
10mA
= 25
C
= 32 - 35V; at 2.2k
9.0
6.0
0.5
340 400
4X
16
850
1.85
1
460
0.8
10 mV
A
A
A mA
Hz
V
V
A
Hz
1.
The Field Drive capability shall not decrease as a function of temperature between 25°C and 150°C, at a rate faster than -
0.024A/°C (for example, Field Drive shall be capable of
7.2A at 100°C).
Figure 3.
Set-point voltage vs. mounting tab temperature
6/11
L9466 Electrical specifications
Table 6.
Symbol
Diagnostic (T case
= -35°C to +150°C unless otherwise specified)
Parameter Conditions Min. Typ.
Max.
Units
V
OV
Over-voltage V
SP
+ 1
V
SP
+
1.3
V
SP
+ 2 V
V
V
V
UV
L-SAT
L-SAT-BO
Under-voltage
Lamp ON saturation voltage
Lamp ON voltage
(1)
I
F
P
> F
P-LRC
0.95
L
= 0.5A (sinked by ASVR) >V
L-ACT
I
L
< 0.5A, VGO = Open; T case
=
-35
C to 85
C
1.33
3.8
1.8
1.45
5
V
V
V
V
L-RLY
Lamp OFF (relay drive) saturation voltage (vs. B+)
I
L
= 750mA (Sourced by ASVR)
(2)
T case
< 125°C
Delay before Lamp ON
1.85
T
DELAY
Fault indication delay time 0.9
1.1
1.3
1.
This condition can happen when the connection between the battery and VGO or the output terminal of the generator is broken. The 1.1 second delay is not required, and current is sinked by ASVR.
2.
When no fault is detected the Lamp terminal is pulled up by ASVR.
V s
Table 7.
Fault indication table
Conditions
Initial KEY-ON Bulb and Wiring Check (Lamp ON for 1 sec.
15% after initial KEY-ON)
V
GO
> V
OV
V
P
< V
P-F
AND V
GO
< V
SP
F
P
< F
P-TR
@ V
P-TR
No Connection Between Battery and V
GO
At Start: Lamp ON until F
P
>F
P-IR
AND V
P
>V
P-F
. i.e. until V
P
reaches 8V.
T
Delay
No
Yes
Yes
Yes
No
No
Table 8.
Symbol
V
L-PD
I
L-PD
V
P-IR
I
P
F
P-IR
F
P-TR
IRD
Regulation features
Parameter Conditions
L terminal regulator activate threshold
VGO=12.6V
L terminal pull down current
Phase terminal current sink
V
L
= V
L-ACT
VGO=12.6V
Initiate regulation phase voltage threshold
Regulator Activated
V
P
> 1.5V and < 12.6V
VGO = 12.6V
Initiate regulation phase frequency
Terminate regulation phase frequency
Initiate regulation delay
Regulator activated, V
P-IR
and
F
P-IR
Conditions Met First Time.
Min.
0.8
0.09
1.1
0.25
123
59
1.7
Typ.
Max.
1
1.3
145
72
2
1.15
0.78
1.5
3.5
167
86
2.3
Unit
V mA
V mA
Hz
Hz s
7/11
Electrical specifications L9466
Table 8.
Symbol
F
LRC Load response control rate
P-LRC
LRC transition frequency
SS
Regulation features (continued)
Soft-start
Parameter
FSDC Field strobe duty cycle
Conditions
Regulator activated AND
(regulation terminated OR regulation NOT initiated)
Field drive duty cycle increase
LRC enabled if F
P
< F
P-LRC
LRC enabled until V
SP
reached regardless other conditions
Min.
16
8.5
255
34
Typ.
Max.
Unit
18.75
10
300
40
22
11.5
345
46
%
%/s
Hz
%/s
8/11
L9466 Package information
In order to meet environmental requirements, ST (also) offers these devices in ECOPACK
® packages. ECOPACK
®
packages are lead-free. The category of second Level Interconnect is marked on the package and on the inner box label, in compliance with JEDEC Standard
JESD97. The maximum ratings related to soldering conditions are also marked on the inner box label.
ECOPACK is an ST trademark. ECOPACK specifications are available at: www.st.com.
Figure 4.
Multiwatt8 mechanical data and package dimensions
DIM.
C
E
A
B mm inch
MIN.
TYP.
MAX.
MIN.
TYP.
MAX.
0.49
5
2.65
1.6
0.55
0.019
0.197
0.104
0.063
0.022
F
G
0.78
0.85
0.030
0.033
2.40
2.54
2.68
0.094
0.10
0.105
G1 17.64
17.78
17.92
0.69
0.70
0.71
H1 19.6
0.772
L7
S
S1
U
Z
H2
L
L2
L3
L4
Dia1 3.65
2.65
1.9
1.9
0.40
0.70
20.35
20.2
20.65
0.80
0.795
0.81
17.05
17.20
17.35
0.67
0.68
0.68
17.25
17.5
17.75
0.679
0.689
0.699
10.3
10.7
10.9
0.406
0.421
0.429
2.9
2.6
2.6
0.55
0.85
3.85
0.104
0.075
0.075
0.015
0.028
0.144
0.114
0.102
0.102
0.022
0.034
0.152
OUTLINE AND
MECHANICAL DATA
Multiwatt8 (Pin 5 GND)
0043696 F
9/11
Revision history
Table 9.
Date
21-Oct-2008
Document revision history
17-May-1994
19-Sep-2013
Revision
1
2
3
Changes
Initial release.
Revalidation document.
Document reformatted.
Updated
Section 2: Pin description on page 4 .
Updated Disclaimer.
L9466
10/11
L9466
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