STMICROELECTRONICS L9484

L9484
CAR ALTERNATOR VOLTAGE REGULATOR
PRODUCT PREVIEW
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FOR AIR AND LIQUID COOLED
APPLICATIONS
AMBIENT AIR TEMPERATURE
(THERMISTOR) COMPENSATED
SPECIAL DEFAULT COMPENSATION
CURVE WITH TS-TERMINAL OPEN
COMPENSATION CURVE WITH
APPLICATION SPECIFIC RESISTOR ON TS
THERMAL PROTECTION
FIELD DRIVER, LAMP DRIVER, RELAY
DRIVER, AND DF (FIELD MONITOR) SHORT
CIRCUIT PROTECTED
LOAD RESPONSE CONTROL
SINGLE PHASE AUTOSTART
DESCRIPTION
The L9484 is a monolithic multifunction generator
MULTIWATT8
ORDERING NUMBER: L9484
Voltage regulator intended for use in automotive
charging applications. 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.
Figure 1. Typical Application SchematicPIN DESCRIPTION
NTC
7
4
1
8
2
6
3
February 2003
This is preliminary information on a new product now in development. Details are subject to change without notice.
1/8
L9484
N°
Pin
1
VGO
Description
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
6
DF
7
L
Lamp - Low Side Driver; Relay - High Side Driver
8
P
Phase Sense Input
Generator Output – Voltage Sense and Power Supply to ASVR
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.
Inverted Field Monitor Output
PIN CONNECTION (Top view)
Tab connected to pin 5
8
P
7
L
6
DF
5
GND
4
TS
3
G
2
F+
1
VGO
D02AT502
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Output Current Capability
Power Dissipation
Short Circuit Protected
Value
Unit
INTERNALLY LIMITED
A
6
W
All Terminal, to VGO and
Ground
THERMAL DATA
Symbol
Parameter
Value
Unit
Tj
Junction Temperature
-40 to +150
°C
Tstg
Storage Temperature
-50 to +150
°C
Tsd
Thermal Shut-Down
175 ± 15
°C
1.5
°C/W
Rth j-case
Thermal Resistance Junction to Case
Notes: 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/
2/8
L9484
ELECTRICAL CHARACTERISTCS
(Tcase = -35°C to +150°C continuous unless otherwise specified)
Symbol
Parameter
VOS
Operating Supply Voltage
VOS
ISB
Test Condition
Min.
Typ.
Max.
Unit
Vov
V
Tcase = +25°C to =150°C
8
Operating Supply Voltage
Tcase = -40°C to +25°C
10
Stand-By Current
VGO = 12.6V; Tcase = 25°C; 10kΩ
VGO to TS; F+, G & Tab (Slug)
Grounded; L, DF, & P
unconnected; Regulator NOT
Activated.
VSP
Regulator Set-Point
10kΩ between VGO and TS
Curve shown in Fig. 2
VSP
Regulator Set-Point
NTC thermistor with R25°C =
10kΩ; Tj = 90°C
Curves shown in Fig. 3
(with MURATA NTC NTH4G39A1)
VNB
Generator Output, No Battery
No battery, IOUT = 2A to 50%
Max. Load
VSP - 2
TC
Thermal Compensation
Voltage @ VGO
VLR
Load Regulation
6500 grpm, 10% to 95% load
300
mV
VSR
Speed Regulation
15A load, 2000 to 20,000 grpm
100
mV
VF-ON
Output Saturation Voltage
IF = 6A, VGO = 14.0V, Tcase =
25°C
750
mV
VF-ON
Output Saturation Voltage
IF = 5A, VGO = 13.5V, Tcase =
125°C
850
mV
IF-LIM
Field Limit Current1
Current F+ Terminal to Gnd.
@ Tcase ≤ 25°C
9.0
A
IF-LIM
Field Limit Current1
Current F+ Terminal to Gnd.
@ Tcase = +150°C
6.0
A
IG-MIN
Min. Generator Current Load
Current measured @ generator
output
0.5
A
VD-F
Field Discharge Diode
IF = 6A, Tcase = 25°C
ID-R
Diode Reverse Current
VR = 20V
FOSC
Oscillation Frequency
During LRC operation
VDF
DF Saturation Voltage
IDF ≤ 10mA
DF Output Leakage Current
VDF < 25V
IDF-LK
Vov
V
300
µA
VSP +
2
V
Curves shown in Figs. 2, 3
340
400
FTURBO
Internal Clock Frequency
VDF = 32 - 35V; thru 2.2kΩ
4X
FTURBO
IRD, SS, LRC Rate
VDF = 32 - 35V; thru 2.2kΩ
÷ 16
1.85
V
1
mA
460
Hz
0.8
V
10
µA
Hz
°C (for example, Field Drive shall be capable of ≥7.2A at 100°C).
3/8
L9484
Figure 2. Set-Point Voltage vs. Mounting Tab Temperature (10kΩ between VGO & TS)
15.5
15.3
15.1
Volts
14.9
14.7
14.5
14.3
14.1
13.9
13.7
13.5
-40
-20
0
20
40
60
80
100
120
Junction Temp
Figure 3. Set-Point Voltage vs. Thermistor Temperature, Tj = 90°C (Not guaranteed by testing,
depending on NTC characteristics)
15.2
15.04
15
14.88
14.8
14.73
14.6
Volts
14.49
14.4
14.2
14
13.91
13.8
13.6
13.53
13.4
-40
-20
0
20
40
60
80
100
120
NTC Temp
Figure 4. Set-Point Voltages vs. Mounting Tab Temperature (TS-Open)
15.2
15
14.80
14.8
14.63
Set Voltages
14.6
14.4
14.2
14.43
14.12
14.00
14
13.8
13.6
13.36
13.4
13.2
-40
-20
0
20
40
60
Temp
4/8
80
100
120
140
160
L9484
DIAGNOSTIC (Tcase = -35°C to +150°C unless otherwise specified)
Symbol
VOV
VL-SAT
Parameter
Conditions
Over-Voltage
Lamp ON Saturation Voltage
IL = 0.5A (sinked by ASVR)
VL-SAT-BO Lamp ON Voltage 2
VL-RLY
TDELAY
Min.
Typ.
Max.
Units
VSP + 1
VSP +
1.3
VSP + 2
V
>VL-ACT
1.33
1.45
V
3.8
5
V
1.85
V
1.3
s
IL < 0.5A, VGO = Open; Tcase = 35°C to 85°C
Lamp OFF (Relay Drive)
Saturation Voltage (vs. B+)
IL = 750mA (Sourced by ASVR)
Fault Indication Delay Time
Delay before Lamp ON
3
Tcase < 125C
0.9
1.1
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
TDelay?
Conditions
Initial KEY-ON Bulb and Wiring Check (Lamp ON for 1 sec ± 15% after initial KEY-ON)
No
VGO > VOV
Yes
VP < VP-F AND VGO < VSP
Yes
FP < FP-TR @ VP-TR
Yes
No Connection Between Battery and VGO
No
At Start: Lamp ON until FP>FP-IR AND VP>VP-F. i.e. until VP reaches 8V.
No
REGULATION FEATURES
Symbol
Parameter
Conditions
Min.
Typ.
Max.
Unit
1
1.15
V
0.78
mA
VL-PD
L Terminal Regulator Activate
Threshold
VGO=12.6V
0.8
IL-PD
L Terminal Pull Down Current
VL = VL-ACT
VGO=12.6V
0.09
VP-IR
Initiate Regulation Phase Voltage
Threshold
Regulator Activated
1.1
1.3
1.5
V
VP-TR
Terminate Regulation Phase
Voltage Threshold
Regulator Activated
1.1
1.3
1.5
V
7.0
8
9.0
V
3.5
mA
167
Hz
VP-F
IP
FP-IR
Phase Input Voltage Low FAULT
Threshold
Phase Terminal Current Sink
Initiate Regulation Phase
Frequency
VP > 1.5V and < 12.6V
VGO = 12.6V
0.3
123
145
5/8
L9484
REGULATION FEATURES (continued)
Symbol
FP-TR
Parameter
Conditions
Terminate Regulation Phase
Frequency
Min.
Typ.
Max.
Unit
59
72
86
Hz
IRD
Initiate Regulation Delay
Regulator Activated, VP-IR AND
FP-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
%
Load Response Control Rate
Field Drive Duty Cycle Increase
34
40
46
%/s
LRC Transition Frequency
LRC Enabled if FP < FP-LRC
255
300
345
Hz
Soft-Start
LRC enabled until VSP reached
regardless other conditions
34
40
46
%/s
LRC
FP-LRC
SS
6/8
L9484
mm
DIM.
MIN.
TYP.
inch
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
OUTLINE AND
MECHANICAL DATA
0.022
F
0.78
0.85
0.030
G
2.40
2.54
2.68
0.094
0.10
0.105
0.033
G1
17.64
17.78
17.92
0.69
0.70
0.71
H1
19.6
0.772
H2
20.2
20.65
0.795
L
20.35
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
Multiwatt8 (Pin. 5 Gnd)
7/8
L9484
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
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