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L9484
February 2003
This is preliminary information on a new product now in development. Details are subject to change without notice.
s
FOR AIR AND LIQUID COOLED
APPLICATIONS
s
AMBIENT AIR TEMPERATURE
(THERMISTOR) COMPENSATED
s
SPECIAL DEFAULT COMPENSATION
CURVE WITH TS-TERMINAL OPEN
s
COMPENSATION CURVE WITH
APPLICATION SPECIFIC RESISTOR ON TS
s
THERMAL PROTECTION
s
FIELD DRIVER, LAMP DRIVER, RELAY
DRIVER, AND DF (FIELD MONITOR) SHORT
CIRCUIT PROTECTED
s
LOAD RESPONSE CONTROL
s
SINGLE PHASE AUTOSTART
DESCRIPTION
The L9484 is a monolithic multifunction generator
Voltage regulator intended for use in automotive
charging applications. This All Silicon Voltage Regu-
lator regulates the output of an automotive generator
by controlling the field winding current by means of a
variable frequency PWM high side driver.
MULTIWATT8
ORDERING NUMBER: L9484
PRODUCT PREVIEW
CAR ALTERNATOR VOLTAGE REGULATOR
Figure 1. Typical Application SchematicPIN DESCRIPTION
7
6
3
2
8
1
4
NTC
L9484
2/8
PIN CONNECTION (Top view)
ABSOLUTE MAXIMUM RATINGS
THERMAL DATA
Notes: 1. The Field Drive capability shall not decrease as a function of temperature between 25C and 150C, at a rate faster than -0.024A/
N
Pin
Description
1
V
GO
Generator Output Voltage Sense and Power Supply to ASVR
2
F+
Field Driver - High Side Drive Output
3
G
Ground for ASVR (Must be connected for Ground for ASVR)
4
TS
Thermistor Sense Terminal
5
Gnd
Internally connected to the Tab or Slug in MW-8. Shall not be used for ASVR Ground, nor
voltage applied to Pin 5 to cause
50mV Pin 5 to Pin 3. May be unconnected or externally
connected to Pin 3.
6
DF
Inverted Field Monitor Output
7
L
Lamp - Low Side Driver; Relay - High Side Driver
8
P
Phase Sense Input
Symbol
Parameter
Value
Unit
Output Current Capability
INTERNALLY LIMITED
A
Power Dissipation
6
W
Short Circuit Protected
All Terminal, to VGO and
Ground
Symbol
Parameter
Value
Unit
T
j
Junction Temperature
-40 to +150
C
T
stg
Storage Temperature
-50 to +150
C
T
sd
Thermal Shut-Down
175
15
C
R
th j-case
Thermal Resistance Junction to Case
1.5
C/W
1
2
3
4
5
6
7
D02AT502
8
P
L
DF
GND
TS
G
F+
V
GO
Tab connected to pin 5
3/8
L9484
C (for example, Field Drive shall be capable of
7.2A at 100C).
ELECTRICAL CHARACTERISTCS
(T
case
= -35C to +150C continuous unless otherwise specified)
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
V
OS
Operating Supply Voltage
T
case
= +25
C to =150
C
8
Vov
V
V
OS
Operating Supply Voltage
T
case
= -40
C to +25
C
10
Vov
V
I
SB
Stand-By Current
V
GO
= 12.6V; T
case
= 25
C; 10k
V
GO
to TS; F+, G & Tab (Slug)
Grounded; L, DF, & P
unconnected; Regulator NOT
Activated.
300
A
V
SP
Regulator Set-Point
10k
between V
GO
and TS
Curve shown in Fig. 2
V
SP
Regulator Set-Point
NTC thermistor with R
25
C
=
10k
; T
j
= 90C
Curves shown in Fig. 3
(with MURATA NTC NTH4G39A1)
V
NB
Generator Output, No Battery
No battery, I
OUT
= 2A to 50%
Max. Load
V
SP
- 2
V
SP
+
2
V
T
C
Thermal Compensation
Voltage @ V
GO
Curves shown in Figs. 2, 3
V
LR
Load Regulation
6500 grpm, 10% to 95% load
300
mV
V
SR
Speed Regulation
15A load, 2000 to 20,000 grpm
100
mV
V
F-ON
Output Saturation Voltage
I
F
= 6A, V
GO
= 14.0V, T
case
=
25
C
750
mV
V
F-ON
Output Saturation Voltage
I
F
= 5A, V
GO
= 13.5V, T
case
=
125
C
850
mV
I
F-LIM
Field Limit Current
1
Current F+ Terminal to Gnd.
@ T
case
25
C
9.0
A
I
F-LIM
Field Limit Current
1
Current F+ Terminal to Gnd.
@ T
case
= +150
C
6.0
A
I
G-MIN
Min. Generator Current Load
Current measured @ generator
output
0.5
A
V
D-F
Field Discharge Diode
I
F
= 6A, T
case
= 25
C
1.85
V
I
D-R
Diode Reverse Current
V
R
= 20V
1
mA
F
OSC
Oscillation Frequency
During LRC operation
340
400
460
Hz
V
DF
DF Saturation Voltage
I
DF
10mA
0.8
V
I
DF-LK
DF Output Leakage Current
V
DF
< 25V
10
A
F
TURBO
Internal Clock Frequency
V
DF
= 32 - 35V; thru 2.2k
4X
Hz
F
TURBO
IRD, SS, LRC Rate
V
DF
= 32 - 35V; thru 2.2k
16
L9484
4/8
Figure 2. Set-Point Voltage vs. Mounting Tab Temperature (10k
between V
GO
& TS)
Figure 3. Set-Point Voltage vs. Thermistor Temperature, T
j
= 90C (Not guaranteed by testing,
depending on NTC characteristics)
Figure 4. Set-Point Voltages vs. Mounting Tab Temperature (TS-Open)
13.5
13.7
13.9
14.1
14.3
14.5
14.7
14.9
15.1
15.3
15.5
-40
-20
0
20
40
60
80
100
120
Junction Temp
Vo
l
t
s
13.53
14.49
14.73
13.91
14.88
15.04
13.4
13.6
13.8
14
14.2
14.4
14.6
14.8
15
15.2
-40
-20
0
20
40
60
80
100
120
NTC Temp
Vo
l
t
s
13.36
14.80
13.4
13.6
13.8
14
14.2
14.4
14.6
14.8
15
15.2
-40
-20
0
20
40
60
80
100
120
Temp
Se
t
Vo
lt
a
g
e
s
160
140
13.2
14.63
14.43
14.12
14.00
5/8
L9484
DIAGNOSTIC (T
case
= -35
C to +150
C unless otherwise specified)
2. 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.
3. When no fault is detected the Lamp terminal is pulled up by ASVR.
FAULT INDICATION TABLE
Symbol
Parameter
Conditions
Min. Typ.
Max.
Units
V
OV
Over-Voltage
V
SP
+ 1
V
SP
+
1.3
V
SP
+ 2
V
V
L-SAT
Lamp ON Saturation Voltage
I
L
= 0.5A (sinked by ASVR)
>V
L-ACT
1.33
1.45
V
V
L-SAT-BO
Lamp ON Voltage
2
I
L
< 0.5A, VGO = Open; T
case
= -
35
C to 85
C
3.8
5
V
V
L-RLY
Lamp OFF (Relay Drive)
Saturation Voltage (vs. B+)
I
L
= 750mA (Sourced by ASVR)
3
Tcase < 125C
1.85
V
T
DELAY
Fault Indication Delay Time
Delay before Lamp ON
0.9
1.1
1.3
s
Conditions
T
Delay
?
Initial KEY-ON Bulb and Wiring Check (Lamp ON for 1 sec
15% after initial KEY-ON)
No
V
GO
> V
OV
Yes
V
P
< V
P-F
AND V
GO
< V
SP
Yes
F
P
< F
P-TR
@ V
P-TR
Yes
No Connection Between Battery and V
GO
No
At Start: Lamp ON until F
P
>F
P-IR
AND V
P
>V
P-F
. i.e. until V
P
reaches 8V.
No
REGULATION FEATURES
Symbol
Parameter
Conditions
Min.
Typ.
Max.
Unit
V
L-PD
L Terminal Regulator Activate
Threshold
VGO=12.6V
0.8
1
1.15
V
I
L-PD
L Terminal Pull Down Current
V
L
= V
L-ACT
VGO=12.6V
0.09
0.78
mA
V
P-IR
Initiate Regulation Phase Voltage
Threshold
Regulator Activated
1.1
1.3
1.5
V
V
P-TR
Terminate Regulation Phase
Voltage Threshold
Regulator Activated
1.1
1.3
1.5
V
V
P-F
Phase Input Voltage Low FAULT
Threshold
7.0
8
9.0
V
I
P
Phase Terminal Current Sink
V
P
> 1.5V and < 12.6V
VGO = 12.6V
0.3
3.5
mA
F
P-IR
Initiate Regulation Phase
Frequency
123
145
167
Hz
L9484
6/8
F
P-TR
Terminate Regulation Phase
Frequency
59
72
86
Hz
IRD
Initiate Regulation Delay
Regulator Activated, V
P-IR
AND
F
P-IR
Conditions Met First Time.
1.7
2
2.3
s
FSDC
Field Strobe Duty Cycle
Regulator Activated AND
(Regulation Terminated OR
Regulation NOT Initiated)
16
18.75
22
%
LRC
Load Response Control Rate
Field Drive Duty Cycle Increase
34
40
46
%/s
F
P-LRC
LRC Transition Frequency
LRC Enabled if F
P
< F
P-LRC
255
300
345
Hz
SS
Soft-Start
LRC enabled until V
SP
reached
regardless other conditions
34
40
46
%/s
REGULATION FEATURES (continued)
Symbol
Parameter
Conditions
Min.
Typ.
Max.
Unit
7/8
L9484
Multiwatt8 (Pin. 5 Gnd)
DIM.
mm
inch
MIN.
TYP.
MAX.
MIN.
TYP.
MAX.
A
5
0.197
B
2.65
0.104
C
1.6
0.063
E
0.49
0.55
0.019
0.022
F
0.78
0.85
0.030
0.033
G
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
H2
20.2
0.795
L
20.35
20.65
0.80
0.81
L2
17.05
17.20
17.35
0.67
0.68
0.68
L3
17.25
17.5
17.75
0.679
0.689
0.699
L4
10.3
10.7
10.9
0.406
0.421
0.429
L7
2.65
2.9
0.104
0.114
S
1.9
2.6
0.075
0.102
S1
1.9
2.6
0.075
0.102
U
0.40
0.55
0.015
0.022
Z
0.70
0.85
0.028
0.034
Dia1
3.65
3.85
0.144
0.152
OUTLINE AND
MECHANICAL DATA
Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences
of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted
by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject
to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not
authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics.
The ST logo is a registered trademark of STMicroelectronics
2003 STMicroelectronics - All Rights Reserved
STMicroelectronics GROUP OF COMPANIES
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L9484
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